321 Studios Gas Grill P777 User Manual

P777  
Handbook Multichannel power amplifier  
MULTICHANNEL POWER AMPLIFIER  
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Warning  
Mains plug/appliance coupler is used to disconnect  
device and it shall remain readily operable.  
CAUTION  
RISK OF ELECTRIC  
SHOCK DO NOT OPEN  
ATTENTION  
RISQUE DE CHOC ELECTRIQUE  
NE PAS OUVRIR  
CAUTION: To reduce the risk of electric shock, do not remove cover (or back). No user serviceable parts inside. Refer  
servicing to qualified service personnel.  
WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.  
CLASS I construction shall be connected to a MAINS  
socket outlet with a protective earthing connection.  
safety  
guidelines  
Do not defeat the safety purpose of the polarized or  
grounding-type plug. A polarized plug has two blades  
with one wider than the other. A grounding type plug  
has two blades and a third grounding prong. e wide  
blade or the third prong are provided for your safety. If  
the provided plug does not fit into your outlet, consult an  
electrician for replacement of the obsolete outlet.  
e lightning flash with an arrowhead symbol within an equilateral triangle, is intended to alert the user to the  
presence of uninsulated ‘dangerous voltage’ within the product’s enclosure that may be of sufficient magnitude to  
constitute a risk of electric shock to persons.  
e exclamation point within an equilateral triangle is intended to alert the user to the presence of important  
operating and maintenance (servicing) instructions in the literature accompanying the product.  
CAUTION: In Canada and the USA, to prevent electric shock, match the wide blade of the plug to the wide slot in the  
socket and insert the plug fully into the socket.  
Many of these items are common sense precautions but, for your own safety and to ensure that you do not damage the unit, you must read them.  
5. Ventilation  
10. Power sources  
15. Damage requiring service  
e equipment should be serviced by qualified service  
personnel when:  
A. the power-supply cord or the plug has been  
damaged, or  
B. objects have fallen, or liquid has spilled into the  
equipment, or  
Important safety instructions  
Do not place the equipment on a bed, sofa, rug or  
similar soſt surface, or in an enclosed bookcase or  
cabinet, since ventilation may be impeded.  
Only connect the equipment to a power supply of  
the type described in the operating instructions or as  
marked on the equipment.  
is product is designed and manufactured to meet  
strict quality and safety standards. However, you should  
be aware of the following installation and operation  
precautions.  
Keep a minimum of 5cm (2 inches) clear around the  
apparatus to allow sufficient passage of air.  
e primary method of isolating the equipment from  
the mains supply is to remove the mains plug. e  
equipment must be installed in a manner that makes  
disconnection possible.  
1. Follow all instructions  
6. Heat  
You should read all the safety and operating instructions  
before operating this equipment. Retain this handbook  
for future reference and adhere to all warnings in the  
handbook or on the equipment.  
C. the equipment has been exposed to rain, or  
Locate the equipment away from naked flames or heat-  
producing appliances such as radiators, stoves or other  
appliances that produce heat.  
11. Power-cord protection  
D. the equipment does not appear to operate  
normally or exhibits a marked change in  
performance, or  
E. the equipment has been dropped or the enclosure  
damaged.  
Power supply cords should be routed so that they are not  
likely to be walked on or pinched by items placed upon  
or against them. Pay particular attention to the point  
where they exit from the equipment.  
7. Climate  
2. Water and moisture  
e equipment has been designed for use in moderate  
climates and in domestic situations. Unplug this  
equipment during lightning storms to prevent possible  
damage from a strike or mains surge.  
e presence of electricity near water can be dangerous.  
Do not use the equipment near water – for example next  
to a bathtub, washbowl, kitchen sink, in a wet basement  
or near a swimming pool, etc.  
12. Non-use periods  
Safety compliance  
is equipment has been designed to meet the IEC/EN  
60065 international electrical safety standard.  
is device complies with Part 15 of the FCC Rules.  
Operation is subject to the following two conditions:  
(1) is device may not cause harmful interference, and  
(2) this device must accept any interference received,  
including interference that may cause undesired  
operation.  
If the equipment is not being used for an extended  
period, we recommend that you unplug the power cord  
of the equipment from the outlet, to save power.  
8. Cleaning  
3. Object or liquid entry  
Unplug the unit from the mains supply before cleaning.  
Take care that objects do not fall and liquids are not  
spilled into the enclosure through any openings. Liquid-  
filled objects such as vases should not be placed on the  
equipment.  
13. Abnormal smell  
e case should normally only require a wipe with a soſt,  
lint-free cloth. Do not use chemical solvents for cleaning.  
If an abnormal smell or smoke is detected from the  
equipment, turn the power off immediately and unplug  
the equipment from the wall outlet. Contact your dealer  
and do not reconnect the equipment.  
We do not advise the use of furniture cleaning sprays or  
polishes as they can cause permanent white marks.  
4. Liſting and placing the equipment  
is amplifier weighs 37.2kg, so take extreme care when  
liſting or moving this unit. We recommend that two  
people are available to liſt this unit.  
9. Grounding  
Ensure that the unit is grounded (‘earthed’) properly at  
all times  
14. Servicing  
You should not attempt to service the equipment.  
Contact your dealer to arrange servicing.  
Only use a rack or shelf that is stable and strong enough  
to support the weight of this equipment.  
E-2  
 
 
ank you and congratulations for purchasing your Arcam FMJ P777 Multichannel power  
amplifier.  
Contents  
Arcam has been producing specialist audio products of remarkable quality for over three  
decades and the P777 is the latest in a long line of award winning HiFi equipment. e design  
of the FMJ range draws upon all of Arcam’s experience as one of the UK’s most respected audio  
companies and is built to give you years of trouble-free listening enjoyment.  
welcome  
is handbook has been designed to give you all the information you need to install, connect  
and use the Arcam P777. It may be that the P777 has been installed and set up as part of your  
Hi-Fi or home cinema installation by a qualified Arcam dealer. In this case, you may wish to  
skip the sections of this handbook dealing with installation and setting up the unit. Use the  
Contents list to guide you to the section of interest.  
We hope that your multichannel power amplifier will give you years of trouble-free operation.  
In the unlikely event of any fault, or if you simply require further information about Arcam  
products, our network of dealers will be happy to help you. Further information can also be  
found on the Arcam website at www.arcam.co.uk.  
e FMJ development team  
MULTICHANNEL POWER AMPLIFIER  
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overview  
e P777 Multichannel Power Amplifier is built  
to Arcam’s traditional high quality design and  
manufacturing standards. It is an extremely high-  
performance multichannel power amplifier obviously  
well suited to multichannel home cinema amplification,  
although it also provides superb quality stereo  
performance with two-channel sources. e P777 is an  
ideal partner for the FMJ AV888 Pre-amp Processor.  
Each power amplifier module is identical, and is  
electrically isolated from the other modules by opto-  
isolated circuitry which ensures that each amplifier  
module has its own isolated supply. is allows the  
amplifier to give excellent channel separation and very  
low distortion.  
Placing the unit  
Power  
<
Place the P777 on a level, firm surface, avoiding  
direct sunlight and sources of heat or damp.  
e P777 is supplied with a moulded mains plug already  
fitted to the lead. Up to 3kW is drawn at maximum  
levels, so a heavy duty IEC mains cable is supplied.  
<
e P777 is a powerful amplifier and a source of  
considerable heat output when driven hard. Take  
this into consideration when placing the unit.  
Check that the plug supplied fits your supply – if your  
mains supply voltage or mains plug is different, or you  
need a new mains lead, please contact your Arcam  
dealer.  
installation  
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<
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Do not place the unit in an enclosed space such as  
a bookcase or closed cabinet unless there is very  
good provision for ventilation.  
Do not place any other component or item on top  
of the P777 as this may obstruct airflow around  
the unit, causing the P777 to run hot.  
Do not place your record deck on top of this  
unit. Record decks are very sensitive to the noise  
generated by mains power supplies which will be  
heard as a background ‘hum’ if the record deck is  
too close.  
Push the IEC plug end of the power cable into the socket  
on the back of the P777, making sure that it is pushed in  
firmly. Plug the other end of the cable into your mains  
socket and, if necessary, switch the socket on.  
Connecting to a pre-amplifier  
Two different connection types are provided for  
receiving signals from your pre-amplifier: phono  
sockets and XLR connectors. e connection type to use  
depends on the set-up that you have.  
e P777 also has input and output phono sockets  
for the signal being fed to each channel, to allow the  
signal to be passed on to additional power amplifiers  
to drive loudspeakers in other rooms or to bi-amplify  
any of the speakers. If the P777 is being used to drive  
a five-channel surround sound system, then the spare  
two modules (SBL and SBR) can be used in conjunction  
with the main (L and R) modules to bi-amplify suitable  
front leſt and right speakers.  
Room acoustics  
<
If the cables to be used to connect your pre-  
amplifier to the P777 are less than 3m long, we  
recommend connecting your pre-amplifier to the  
AudIo IN phono (RCA) sockets of your P777. To  
use the phono connections, make sure that all the  
channel input switches are not depressed.  
e shape of your room and how it’s furnished will affect  
the sound you hear. For instance, too many bare surfaces  
can cause reflections that may add harshness to the  
sound. Adding carpeting and drapes can help.  
If you have a choice of rooms, avoid ones that are  
perfectly square or have one dimension exactly twice  
another. ese rooms can aggravate resonances that  
colour the sound.  
e customised installation of the P777 to a listening  
room is an important process which requires care at  
every stage. For this reason, the installation information  
is very comprehensive and should be followed carefully.  
is manual has been written with the assumption that  
the installer is familiar with the installation of high-end  
audio/video systems.  
<
If the cables to be used to connect your pre-  
amplifier to the P777 are 3m or longer and your  
pre-amplifier has balanced XLR outputs, we  
recommend using these instead of the phono  
(RCA) connections. Performance will also be  
improved in electrically-noisy environments  
by using these connections. To use the XLR  
connections, make sure that the INPuT sElEcT  
switches are depressed for each channel.  
12V Trigger input  
If your pre-amp provides a 12V Trigger output, it can  
be connected to the 12V TRIGGER IN socket using a mono  
3.5mm jack. is enables the P777 to be turned on  
remotely from the pre-amp.  
Female XLR  
Male XLR  
tip: 12V trigger signal  
sleeve: ground  
2
1
2
1
3
3
Pin  
1
Function  
Chassis ground (cable shield)  
‘Hot’ (normal polarity)  
Note that the trigger input is only active when the  
central power button on the front panel is depressed.  
2
3
‘Cold’ (inverted polarity)  
In normal use there is no need to make any connections  
to this input.  
E-4  
 
 
Interconnect cables  
We recommend the use of high-quality screened cables  
that are designed for the particular application. Other  
cables will have different impedance characteristics  
that will degrade the performance of your system (for  
example, do not use cabling intended for video use to  
carry audio signals). All cables should be kept as short as  
is practically possible.  
It is good practice when connecting your equipment to  
make sure that the mains power-supply cabling is kept  
as far away as possible from your audio cables. Failure to  
do so may result in unwanted noise in the audio signals.  
Speaker terminals  
Input select switch  
e P777 is equipped with seven pairs of  
speaker terminals. See page 7 for information  
on the different ways of connecting  
loudspeakers.  
Depress this switch to take the audio source  
from the BAlANcEd XlR INPuT connector for  
each channel; if the switch is not depressed,  
the audio source is taken from the AudIo IN  
RCA (phono) connector.  
CH.7 / SBR  
4Ð16  
OHMS  
CH.6 / SR  
4Ð16  
OHMS  
CH.5 / RIGHT  
CH.4 / CENTRE  
CH.3 / LEFT  
CH.2 / SL  
4Ð16  
OHMS  
CH.1 / SBL  
4Ð16  
OHMS  
4Ð16  
OHMS  
4Ð16  
OHMS  
4Ð16  
OHMS  
CLASS 2  
WIRING  
CLASS 2  
WIRING  
CLASS 2  
WIRING  
CLASS 2  
WIRING  
CLASS 2  
WIRING  
CLASS 2  
WIRING  
CLASS 2  
WIRING  
Ð
+
Ð
+
Ð
+
Ð
+
Ð
+
Ð
+
Ð
+
XLR audio input  
BALANCED  
XLR INPUT  
BALANCED  
XLR INPUT  
BALANCED  
XLR INPUT  
BALANCED  
XLR INPUT  
BALANCED  
XLR INPUT  
BALANCED  
XLR INPUT  
BALANCED  
XLR INPUT  
Balanced XLR connectors for each  
of seven channels, from an XLR-  
equipped pre-amplifier.  
XLR  
RCA  
XLR  
RCA  
XLR  
RCA  
XLR  
RCA  
XLR  
RCA  
XLR  
RCA  
XLR  
RCA  
INPUT  
SELECT  
INPUT  
SELECT  
INPUT  
SELECT  
INPUT  
SELECT  
INPUT  
SELECT  
INPUT  
SELECT  
INPUT  
SELECT  
IN  
IN  
IN  
IN  
IN  
IN  
IN  
OUT  
OUT  
OUT  
OUT  
OUT  
OUT  
OUT  
AUDIO  
AUDIO  
AUDIO  
AUDIO  
AUDIO  
AUDIO  
AUDIO  
POWER INLET  
220V  
- 240V  
Power inlet  
Check the mains  
50Ð60Hz  
1800VA  
MAX  
XLR CONNECTIONS:  
PIN1: CABLE SCREEN  
PIN2: ÔHOTÕ SIGNAL  
PIN3: ÔCOLDÕ SIGNAL  
2
1
3
supply voltage matches  
the values printed on  
the back panel before  
connecting the mains  
cable here.  
12V TRIGGER  
IN  
12V Trigger input  
audio input and output  
See page 4 for details.  
AudIo IN from a pre-amplifier for each of  
seven channels. AudIo ouT may be used to  
bi-amplify a set of speakers (see page 7).  
E-5  
 
 
speakers  
Speaker placement  
Speaker wiring options  
notes on making speaker  
connections  
e P777 allows connection of up to seven  
loudspeakers. All speakers, with the exception of the  
subwoofer, should be arranged around your normal  
viewing/listening position (see diagram). e subwoofer  
can be placed almost anywhere and we recommend  
experimenting with it in various positions to obtain the  
best result.  
e surround leſt (SL) and right (SR) speakers  
reproduce the ambient sound and effects present in a  
multichannel home cinema system.  
Single wiring  
Single wiring is the conventional wiring method of  
running a single cable per channel between the amplifier  
and the speaker; this is the easiest technique.  
<
Do not make any connections to any amplifier  
while it is switched on. We recommend that  
your amplifier is completely disconnected  
from the mains supply before starting.  
e surround back leſt (SBL) and surround back right  
(SBR) speakers are used to add extra depth, a more  
spacious ambience and sound localisation.  
bi-wiring  
<
Before switching your amplifier on for the  
first time aſter connecting to speakers, please  
check all connections thoroughly. Ensure  
that bare wires or cables are not touching  
each other or the amplifiers chassis (which  
could cause short circuits), and that you  
have connected positive (+) to positive and  
negative () to negative. Be sure to check the  
wiring for both the amplifier and the speaker.  
Bi-wiring is running two separate cables between the  
amplifier and each speaker, with one cable carrying  
the low-frequency information, the other the higher-  
frequency signals.  
A subwoofer (SW) will greatly improve the bass  
performance from your system. is is useful for  
reproducing special cinema effects, especially where  
a dedicated LFE (Low-Frequency Effects) channel is  
available, as with Dolby Digital or DTS Digital Surround  
encoded discs.  
e closer you place a speaker to intersecting room  
surfaces (corners, wall and ceiling, wall and floor),  
the stronger the bass output. is can help bass-shy  
speakers, but it can also add too much bass. Again, just  
moving a speaker a few inches can oſten make a big  
difference in sound.  
Bi-wiring can improve the sound of your system because  
the separation of high- and low-frequency signal  
currents into different speaker cables avoids distortions  
caused by the different currents interacting with one-  
another within a single cable, as occurs in single-wired  
systems.  
Position your front leſt (L) and right (R) speakers  
to achieve a good stereo image for normal musical  
reproduction. If they are placed too close together there  
will be a lack of spaciousness. Alternatively if they are  
placed too far apart the stereo image will appear to have  
a hole in the middle and will be
halves.  
<
<
Aſter making connections: switch the  
amplifier on, with the pre-amplifier volume  
set to a low setting. Select a source signal, then  
gradually increase the volume to the required  
listening level.  
If you are unsure as to how your system  
should be connected, or need advice on  
bi-wiring or bi-amping, please contact your  
Arcam dealer who will be happy to help you.  
e P777 is designed to allow easy bi-wiring, but you  
will need to connect to loudspeakers that provide  
separate terminals for the two cables. Each speaker  
must have two pairs of terminals; one pair labelled HF  
or ‘High Frequency, the other pair labelled lF or ‘Low  
Frequency.  
L
R
e centre speaker (C) allows fo
realistic reproduction of dialogu
centre sounds as well as wider an
better imaging for stereo effects  
and background sounds for  
bi-amping  
Bi-amping is the separation of the amplification of  
low- and high-frequency signals over two amplifiers.  
Bi-amping requires the use of two amplifiers per  
channel.  
C
SW  
home cinema use. Do not  
SL  
SR  
compromise on the quality  
of your centre speaker as it  
carries all the dialogue for a  
home cinema system.  
SBL  
SBR  
E-6  
 
 
Ð
Ð
Ð
Ð
+
+
+
+
Single wiring  
HF  
LF  
HF  
LF  
...etc...  
If each speaker has more than one pair of connecting terminals, use the terminals labelled  
Ð
Ð
+
+
Ð
Ð
+
+
lF or ‘Low Frequency’ for each speaker.  
HF  
LF  
HF  
LF  
Connect the positive terminal of the right speaker connection on the amplifier (coloured  
red and labelled +R) to the positive terminal of your right speaker. Similarly, connect the  
negative terminal of the amplifier (coloured black and labelled with R–) to the negative  
terminal of your speaker. Repeat the process for the leſt speaker, using the amplifier  
terminals labelled +l and l.  
Arcam P777  
Ð
+
Ð
+
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+
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+
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+
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+
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IN OUT  
IN OUT  
IN OUT  
IN OUT  
IN OUT  
IN OUT  
IN OUT  
speaker  
If your speakers support bi-wiring, then there is a strip of conductive metal on the  
speakers connecting the low-frequency terminals to those for the higher-frequencies; this  
MUST NOT BE REMOVED in a single-wired system.  
SBR  
SR  
R
C
L
SL  
SBL  
Ð
Ð
+
+
bi-wiring  
HF  
LF  
Bi-wiring is performed in the same way as single wiring except that, for each speaker, a  
pair of cables are used to connect the amplifier to each speaker.  
Follow the instructions given for single wiring; then perform the same actions, this time  
connecting the upper set of speaker terminals on your amplifier to the terminals labelled  
HF or ‘High Frequency’ for each speaker. Please refer to the illustration.  
Arcam P777  
Speakers that support bi-wiring have a strip of metal on the speakers connecting the low-  
frequency terminals to those for the higher-frequencies; this MUST BE REMOVED in a  
bi-wired system.  
Ð
+
IN OUT  
Bi-wiring using one amplifier  
channel per speaker  
bi-amping  
Ð
Ð
+
+
HF  
LF  
Bi-amping requires the use of two amplifier channels per speaker. Using this method will  
prevent you from using seven surround speakers.  
Connect two channels of the P777 with a phono cable between the AudIo ouT socket on  
one channel to the AudIo IN channel of another. One channel should then be connected to  
the speakers as described for single wiring, with the exception that this channel should be  
connected to the speaker terminals labelled HF or ‘High Frequency. e second channel must  
then be connected to the lF or ‘Low Frequency’ terminals, as in the diagram.  
Note that the strip of metal on the speakers connecting the lower terminals to the upper  
terminals MUST BE REMOVED. Failure to do so will result in damage to both amplifiers,  
which will not normally be covered under warranty.  
Ð
+
Ð
+
IN OUT  
IN OUT  
Bi-amping using two amplifier  
channels per speaker  
Arcam P777  
Arcam recommends that the phono connections are use for bi-amping. If you prefer to use the  
XLR connectors, use a Y-lead with one female XLR to two male XLRs, so that two amplifier  
channels may be fed from a single source. Contact your dealer if you need assistance.  
E-7  
 
 
MULTICHANNEL POWER AMPLIFIER  
operation  
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7
In the unlikely event that the LEDs do not follow this  
sequence when the unit is powered up, or they behave  
abnormally at any time during use, then refer to the  
‘Fault status indicators’ table on page 10 to discover why  
the amplifier is in protection mode.  
Front panel control  
operating procedure  
Once the relevant connections have been made, the  
P777 can be switched on using the central button on the  
front panel.  
e front panel has a single control: a centrally located  
power on/off button.  
PoWER  
Switching on  
It is recommended that you switch on your pre-amplifier  
or controller before powering up the power amplifier.  
Switching off  
To shut down, switch the power amplifier off first,  
followed by the pre-amplifier or controller.  
is eliminates the chance of any ‘thumps’ or power  
spikes being fed through to the power amplifier and  
potentially causing damage to the system.  
Switches the unit on and off. Note that the modules are  
turned on individually to stagger the surge created when  
a powerful amplifier is switched on (i.e., it provides a  
‘soſt start’). is reduces the surge current drawn from  
the domestic power supply.  
Normal powering up is indicated by the following  
sequence of front panel LED indicators:  
1. On pressing the power switch, all LEDs turn red.  
2. Aſter a short delay (about half-a-second), the  
centre LED turns amber.  
3. e LEDs continue turning amber from the  
centre to the edges in pairs, at about one second  
intervals.  
4. e centre LED turns green and a relay ‘click’ is  
heard.  
5. e LEDs continue turning green from the centre  
to the edges in pairs, along with relay ‘clicks, at  
about one second intervals.  
Status LEds  
A separate LED indicates the status of each of the seven  
channels of the P777.  
e LEDs cycle through red, orange, then green to  
indicate the status from powered-up (initialised),  
stabilised and active respectively.  
All LEDs are off in standby mode.  
E-8  
 
 
trouble-  
shooting  
<
<
the signal (interconnect) leads are not wrapped  
around a mains lead.  
try switching the ground liſt on the back panel of  
the processor (if available).  
no Lights on the Unit  
Check that:  
Sound only comes from some of the speakers  
Check that:  
<
the power cord is plugged into the P777 and the  
mains socket outlet it is plugged into is switched  
on.  
<
<
<
<
all speakers in the system are connected to the  
P777.  
you have configured your pre-amp to include all  
the speakers in your system.  
you have an appropriate surround sound source  
selected and playing through the pre-amp.  
for digital sources, check the player is outputting  
multichannel data. With some DVD players you  
are able to select in what format multi-format  
encoded discs are outputted, and whether  
multichannel data is down-mixed to PCM  
(stereo).  
There is radio/television reception  
interference  
e P777 has been designed to a very high standards of  
electromagnetic compatibility.  
<
<
the plug fuse has not failed, or a circuit-breaker  
earlier in the power supply path has not opened.  
the power button is pressed in.  
Check that:  
Red LEd present  
Refer to the ‘Fault status indicators’ table (overleaf) if  
you have an unusual sequence of LEDs.  
<
<
<
the aerial/dish cable is routed as far as possible  
from your amplifier and its cabling.  
the cabling used from the aerial/dish is of high  
quality and screened.  
repositioning the receiving aerial/dish as far as  
possible from your amplifier and its cabling may  
bring an improvement.  
if the problem persists, contact your aerial  
contractor.  
no sound is produced  
Check that:  
<
the disc you are playing is a multichannel  
recording and that the processor is outputting  
multichannel audio.  
<
<
<
the correct input has been selected on the pre-  
amplifier.  
you have assigned the digital input to the correct  
input source.  
the volume is turned up to a reasonable level and  
‘MUTE’ is not displayed on the front panel display  
on the pre-amplifier.  
<
<
<
<
your speaker balance is correct.  
all amplifiers are turned on and all channels are  
working correctly.  
you are using high quality screened audio cable  
between your equipment and that no cables are  
broken or damaged.  
<
all units are turned on. If the audio is ‘daisy-  
chained’ from the P777, make sure that the unit  
being fed is turned on.  
<
your power amplifier(s) are turned on and  
working correctly.  
Hum on an amplifier output  
Check that:  
Sound is poor and badly distorted  
Check that:  
<
all cables are making a good connection. If  
necessary withdraw the cable from the connector  
and plug it back in again. (Turn the power off  
before doing this.)  
<
all cables are making a good connection. If  
necessary withdraw the cable from the connector  
and plug it back in again. (Turn the power off  
before doing this.)  
<
if the hum originates from a ground loop caused  
by an aerial, satellite dish or cable supply, you  
should contact your aerial contractor.  
<
you have selected the correct size of speakers  
to suit your system in the setup menu of the  
processor or pre-amp.  
E-9  
 
 
Fault status indicators  
e LED patterns below indicate the following fault conditions:  
LED status  
All LEDs are green  
Description  
is is the normal operating state of the amplifier.  
Amplifier action  
None  
During power up all LEDs stay red for an extended time e amplifier is waiting for the DC offset fault lines to  
clear. A DC offset fault can occur if an excessive DC  
To verify excessive DC offset voltage, remove the  
interconnect leads (with the P777 switched off) and turn  
on the P777. e fault should have cleared.  
voltage is present at the output of the pre-amp feeding  
the P777. Normal operation resumes if the lines clear in  
20 seconds.  
During power up or normal operation, one or more  
e DC fault cannot be cleared. e channels with the  
e amplifier shuts down. e power switch must be  
LEDs are flashing green, with the remaining LEDs solid flashing green LEDs represent the amplifier modules that cycled to reset the amplifier (cycling the trigger does  
red  
have a DC offset fault. Alternatively, a DC offset fault has NOT reset the amplifier).  
reoccurred on the same channel within 12 seconds of a  
previous DC offset fault clearance.  
During power up or normal operation, one or more  
e amplifier is attempting to clear a DC offset fault on a e amplifier mutes the channel with the fault and its  
LEDs are flashing green, with the remaining LEDs NOT channel with the flashing green LED.  
paired channel. e amplifier stays in this state for up  
to two seconds or until the fault clears (whichever is  
sooner).  
solid red  
During power up or normal operation, one or more  
LEDs are flashing red, with the remaining LEDs solid  
red  
A short circuit fault cannot be cleared. e flashing red  
e amplifier shuts down. e power switch must be  
LEDs represent the amplifier modules with a short circuit cycled to reset the amplifier (cycling the trigger resets the  
fault. Alternatively, a short circuit fault has reoccurred on amplifier).  
the same channel within 12 seconds of a previous short  
circuit fault clearance.  
During power up or normal operation, one or more  
LEDs are flashing red, with the remaining LEDs NOT  
solid red  
e amplifier is attempting to clear a short circuit fault on e amplifier mutes the channel with the fault and its  
a channel with the flashing red LED.  
paired channel. e amplifier stays in this state for up  
to half-a-second or until the fault clears (whichever is  
sooner).  
During power up or normal operation, one or more  
LEDs are flashing amber  
e amplifier is attempting to clear an over temperature  
fault on a channel with the flashing amber LED.  
e amplifier mutes the channel with the fault and its  
paired channel and the fan is set to maximum speed. e  
amplifier stays in this state until the channel has cooled.  
During power up or normal operation, one LED is  
flashing amber, with the remaining LEDs solid red  
An over temperature fault has reoccurred on the same  
e amplifier shuts down. e power switch must be  
channel within 12 seconds of a previous over temperature cycled to reset the amplifier (cycling the trigger resets the  
fault clearance. e flashing amber LEDs represent the  
amplifier modules with an over temperature fault.  
amplifier).  
During power up or normal operation, all the LEDs are  
flashing amber  
e amplifier is attempting to clear an over temperature  
fault on more than one channel, or the power  
transformers have overheated.  
e amplifier mutes all channels and the fan is set to  
maximum speed. e amplifier stays in this state until all  
channels have cooled, or the transformer has cooled.  
During normal operation, all the LEDs are solid red  
An over temperature fault has reoccurred on one or more e amplifier shuts down. e power switch must be  
channels, or the power transformers have overheated  
within 12 seconds of a previous over temperature fault  
clearance.  
cycled to reset the amplifier (cycling the trigger resets the  
amplifier).  
During power up or normal operation, one or more  
LEDs are flashing amber, with the remaining LEDs  
flashing green  
A DC offset fault occurred on one or more channels  
while attempting to clear a multiple over temperature  
fault.  
e amplifier shuts down. e power switch must be  
cycled to reset the amplifier (cycling the trigger does  
NOT reset the amplifier).  
During power up or normal operation, one or more  
LEDs are flashing amber, with the remaining LEDs  
flashing red  
A short circuit fault occurred on one or more channels  
while attempting to clear a multiple over temperature  
fault.  
e amplifier shuts down. e power switch must be  
cycled to reset the amplifier (cycling the trigger resets the  
amplifier).  
E-10  
 
 
specifications  
All measurements are with 230V/50Hz mains power  
Maximum continuous output power  
Continual improvement policy  
Arcam has a policy of continual improvement for its  
products. is means that designs and specifications  
are subject to change without notice.  
All channels driven, 20Hz–20kHz, 8Ω  
All channels driven, 20Hz–20kHz, 4Ω  
One or two channels driven at 1kHz, 8Ω  
One or two channels driven at 1kHz, 4Ω  
Total harmonic distortion  
160W per channel; 1.05kW total  
270W per channel; 1.62kW total  
170W per channel  
Radio interference  
e P777 is an audio device which has been  
designed to very high standards of electromagnetic  
compatibility.  
290W per channel  
At any level up to rated power, into 4Ω or 8Ω  
Frequency response  
Typically <0.004% at 1kHz  
e unit can radiate RF (radio frequency) energy.  
In some cases this can cause interference with FM  
and AM radio reception. If this is the case, keep the  
P777 and its connecting cables as far from the tuner  
and its aerials as possible. Connecting the P777 and  
the tuner to different mains sockets can also help to  
reduce interference.  
Less than –0.3dB (10Hz—20kHz)  
–3dB at 100kHz  
Residual hum and noise  
Ref. full power  
–108dB, 20Hz–20kHz, unweighted  
x37 (31.5dB), Arcam standard  
470pF in parallel with 22kΩ  
EC Countries – ese products have been designed  
to comply with directive 89/336/EEC.  
Voltage gain  
USA – ese products comply with FCC  
requirements.  
Input impedance  
General  
Power requirements  
115V or 230VAC, 50/60Hz, 1200W maximum via heavy  
duty IEC C20 mains inlet (requires IEC C19 plug).  
A soſt start system eliminates large inrush currents at  
switch on.  
Physical  
E&OE  
Dimensions: W430 x D450 x H180mm  
Weight: 37.2kg net; 40kg packed  
NOTE: All specification values are typical unless otherwise stated  
E-11  
 
 
Worldwide Guarantee  
is entitles you to have the unit repaired free of charge, during the first two years  
aſter purchase, at any authorised Arcam distributor provided that it was originally  
purchased from an authorised Arcam dealer or distributor. e manufacturer can take  
no responsibility for defects arising from accident, misuse, abuse, wear and tear, neglect  
or through unauthorized adjustment and/or repair, neither can they accept responsibility  
for damage or loss occurring during transit to or from the person claiming under the  
guarantee.  
product  
guarantee  
The warranty covers:  
Parts and labour costs for two years from the purchase date. Aſter two years you must pay  
for both parts and labour costs. e warranty does not cover transportation costs at any  
time.  
Claims under guarantee  
is equipment should be packed in the original packing and returned to the dealer from  
whom it was purchased, or failing this, directly to the Arcam distributor in the country of  
residence.  
It should be sent carriage prepaid by a reputable carrier – not by post. No responsibility  
can be accepted for the unit whilst in transit to the dealer or distributor and customers are  
therefore advised to insure the unit against loss or damage whilst in transit.  
For further details contact Arcam at:  
Arcam Customer Support Department,  
Pembroke Avenue, Waterbeach,  
CAMBRIDGE,  
CB25 9QR, England  
or via www.arcam.co.uk.  
Problems?  
If your Arcam dealer is unable to answer any query regarding this or any other Arcam  
product please contact Arcam Customer Support at the above address and we will do our  
best to help you.  
on-line registration  
You can register your product on-line at www.arcam.co.uk.  
Correct disposal of this product  
is marking indicates that this  
product should not be disposed with  
other household waste throughout  
the EU.  
To prevent possible harm to the  
environment or human health from  
uncontrolled waste disposal and to  
conserve material resources, this  
product should be recycled responsibly.  
To dispose of your product, please use your local  
return and collection systems or contact the retailer  
where the product was purchased.  
E-12  
 
 
E-13  
 
A&R cAMBRIdGE lTd, PEMBRokE AVENuE, WATERBEAcH, cAMBRIdGE cB25 9QR, ENGlANd  
SH213E Issue 2  
 

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