Arcam AV8 - Manual (Page 12)

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5.1 Rear speakers defines how the speakers in a full ‘7.1’ installation
handle 5.1 decoded sources.
Surr L/R redirects 5.1 surround signal to the surround left and
right speakers. No signal will be directed to the surround back
left or right speakers.
Surr Back L/R redirects 5.1 surround signal to the surround back
left and right speakers. No signal will be directed to the surround
left or right speakers.
Both redirects the 5.1 surround signal to both pairs of speakers
with the signal to each set reduced by 3dB.
3 – SPEAKER DELAY SETTINGS
3 - Delay Settings
Front Left: 3Ft
Centre: 3Ft
Front Right: 3Ft
Surr. Left: 3Ft
Surr. Back L/R 3Ft
Surr. Right: 3Ft
Subwoofer: 3Ft
NOTE: Only enter these delay settings once you have specified what
delay units (i.e.,
Time, Imperial or Metric) you will be using, or the
information will be lost when changing units. If the delay units are set
to
Time, then enter the delay in milliseconds for each channel.
The speaker distance control automatically sets the appropriate time
delays required for all the speakers in your system. To set up the correct
speaker distance, you must measure from the usual listening position to
the front of each individual speaker in the system. The delay adjustment
is not a substitute for proper speaker placement – it helps to ensure
accurate and correct signal arrival times from all the channels to the
primary listening position.
No measurement can be entered for a speaker that is not selected in
the previous ‘Speaker Sizes’ menu.
Front
left
Surr
left
Surr
right
Surr
back
left
Sub
woofer
Front
right
Centre
e.g. 3m
(9ft)
e.g. 4m
(12ft)
e.g. 2m
(6ft)
Surr
back
left
Surr
back
right
Distance measurements for 5.1 [and 7.1]
speaker delay settings
4 – LEVEL SETTINGS
4 - Level Settings
Test Tone Cycle: Manual
Front L: ---I--- +0dB
Centre: ---I--- +0dB
Front R: ---I--- +0dB
Surr. R: ---I--- +0dB
Surr. BR: Not Present
Surr. BL: Not Present
Surr. L: ---I--- +0dB
Subwoofer: ---I--- +0dB
Select Speaker for Tone
It is very important to calibrate the speakers correctly to achieve an
accurately centred sound stage. We recommend you use a sound
pressure level meter (SPL meter) to perform this part of the setup as
it is difficult to judge the levels accurately by ear alone.
Manual is best for setting up with an SPL meter as the test tone will
not change to the next speaker until instructed by you.
Auto is best for
setting up by ear as the test tone changes automatically to each speaker
after a two second burst of sound.
On first installation, watch the OSD display as you cycle through the
available speakers with the test tone. Check that the speaker in use
corresponds to that indicated on the OSD. If there is an error then
check and correct the system cabling before proceeding further.
To calibrate the speakers with an SPL meter, place the meter at ear
level with the microphone pointing towards the ceiling, when seated in
the usual listening position. You will need to set the meter to ‘
C’ ‚ setting
with a ‘slow’‚ response and to read 75dB SPL at the centre of the scale.
This volume is equivalent to normal conversation.
Each speaker can be finely tuned by 1dB increments to ±10dB. The
output from each speaker needs to be adjusted to the 75dB SPL sound
level. No adjustments can be made for a speaker that is not selected in
the previous ‘Speaker Sizes’ menu.
NOTE: If you do not have an SPL meter, simply set the front left
speaker to 0dB on the menu and then match all the other speakers
to this level.
5 – SUBWOOFER SETTINGS
If no subwoofer was selected in the previous speaker menus you
cannot adjust the stereo sub level or the number of subwoofers.
5 - Subwoofer Settings
Crossover Freq.: 80Hz THX
Stereo Mode: Sat+Sub
LFE Level: ---I--- -0dB
DTS LFE Gain: 0dB Normal
Sub Stereo: ---I--- -0dB
DVD-A Sub Level: Normal
No. of Subwoofers: 1
Crossover Frequency: Allows you to set the frequency at which
the signal is redirected from small speakers to the subwoofer or large
speakers. The adjustment can be made in increments of 10Hz between
40Hz and 150Hz.
If
THX or THX Surr.EX have been selected in the previous menus, the
crossover frequency will be set to THX specification at 80Hz.
Stereo Mode: Select between Large, Large+Sub or Sat+Sub. You
have the flexibility to choose how bass information is distributed to
your speakers only if you have large front left and right speakers and
a subwoofer as part of your home theatre speaker system. To decide
which setting is best for your room, once you have positioned all of
your speakers, choose the option which gives you the most solid even
sounding bass using a setup disc or live program material.
Large Pure stereo information. Use this setting if you have large
front speakers.