NAIM AV2 Owner's Manual - page 23
21
AV2
18.2 Speaker Setup Routine
The Speaker Setup routine defines the presence and size of
the speakers connected to the main, centre, surround, extra
rear and sub-woofer outputs, their distance from the listening
position, and allows their relative volumes to be adjusted. To
switch the AV2 into Speaker Setup mode press the handset
menu
key followed by the
mode
5
key (
front panel:
press and
hold
mode
button).
Note:
Some parameters in the speaker setup routine are
interrelated. For example, if NO is specified for a specific speaker,
its setup options will be unavailable. Similarly if NO sub-woofer is
specified, only a default will be available for the main speakers.
The following order of setup steps is arbitrary. It is possible to
move between setup steps by pressing
2
5
or
8
6
(
front panel:
input
or
mode
buttons).
18.2.1 Main Left and Right Speakers - Size
The mode button indicator on the AV2 front panel will flash,
the display will show
LR
on the left hand side and
LG
or
SM
on
the right hand side.
LR
refers to the main left and right channel
speakers and
LG
(large),
SM
(small) to their size. Pressing either
the
3
4
or
6
4
keys (
front panel:
rotary
control) will prompt
the right hand side of the display to cycle though the
SM
and
LG
options. Select either option and move to the next step by
pressing 8
6
(
front panel:
mode button).
Note:
If the AV2 is being set up from its default state, the main left
and right speaker options will be limited to LG (large) until a sub-
woofer has been specified as present.
Note:
“Large” speakers are typically floor or stand mounted
products. “Small” speakers are typically those intended to be used
as part of a sub-woofer/satellite system. If LG (large) is selected, low
frequency effect signals only are routed to the sub-woofer channel.
If SM (small) is selected, both the low frequency effects and the
main channel low bass signals are routed to the sub-woofer.
18.2.2 Remaining Speakers - Size
Repeat the procedure for the Centre (
CEN
), Surround (
SUR
), Extra
Rear (
ER
) and Sub-woofer (
SUB
) channels each time selecting the
option with the
3
4
or
6
4
keys (
front panel:
rotary control).
Move to the next step by pressing
8
6
(
front panel:
mode
button).
Note: Selecting a SM (small) centre channel speaker routes the
centre channel bass signal to the main left and right speakers or sub-
woofer. Selecting NO (none) routes the centre channel signal equally
to the main left and right speakers.
Note: Selecting SM (small) surround speakers routes the surround
channel bass signal to the main left and right speakers. Selecting NO
(none) routes the entire surround channel signal to the left and right
speakers.
Note:
In addition to size, the Extra Rear Speaker options include
those for quantity - 1SM (one small), 1LG (one large), 2SM (two
small) or 2LG (two large) The definition for “small” and “large”
speakers is the same as for surround speakers.
Note:
The facilities for “extra” rear channels on the AV2 ensures
compatibility with 7.1 encoded programme material.
18.2.3 Sub-woofer Cut-off Frequency
The AV2 display will now show
SBF
on the left hand side and a
numerical value on the right hand side.
SBF
refers to the cut-off
frequency between the sub-woofer and any small speakers. Use
the
3
4
or
6
4
keys (
front panel:
rotary
control) to select a
numerical value. Move to the next step by pressing
8
6
(
front
panel:
mode
button).
Note:
The frequency should be set appropriately for the sub-woofer
and speakers in use. Their specifications should provide guidance.
18.2.4 Left Main Speaker - Distance
The AV2 display will now show
L
on the left hand side and a
numerical distance value on the right hand side.
L
refers to the
left main speaker and the numerical value its distance from the
primary listening position. Use the
3
4
or
6
4
keys (
front panel:
rotary
control) to select a numerical value. Move to the next
step by pressing
8
6
(
front panel:
mode
button).
18.2.5 Remaining Speakers - Distance
Repeat the procedure for the Centre (
CEN
), Main Right (
CEN
CEN
R
), Right
Surround (
RS
), Right Extra Rear (
RR
), Left Extra Rear (
RR
RR
LR
), Left
Surround (
LS
) and Sub-woofer (
SUB
) channels each time selecting
the appropriate distance value with the
3
4
or
6
4
keys (
front
panel:
rotary
control). Move to the next step by pressing
8
6
(
front panel:
mode
button).
Note:
Defining the distance from the speakers to the listening
position adjusts only relative time delays and not volume levels.
Note:
The centre speaker should no further away from the listening
position than either main speaker.
Note:
If specific speakers have been previously defined as not
present their distance parameter will be unavailable.
18.2.6 Speaker Volume Level
The next eight steps of the Speaker Setup routine set the
relative volume levels of the channels. The first of these selects
and activates a test “noise” signal that enables the volume levels
to be adjusted by ear. Ensure that the AV2 is connected to the
necessary amplifiers and sub-woofer, that these are switched on,
and that the speakers are correctly connected.
The AV2 display will show
TST
on the left hand side and either
OFF
or
ON
on the right hand side. Pressing either the
3
4
or
6
4
keys (
front panel:
rotary
control) will prompt the right hand side
of the display to cycle through
OFF
and
ON
. Select
ON
and move
to the next step by pressing
8
6
(
front panel:
mode
button).
Note:
If the test signal is either too loud or too quiet the volume
can be adjusted with the volume up and down keys.
Note:
When using the test noise to adjust the volume level for each
speaker there are some issues that need to be considered if the
dynamic range of the AV2 is to be optimised.
The adjustment levels are relative values only and do not have any
effect on the loudness of the system for a given AV2 volume setting.
For example, if all the speaker channels had a setting of, say, -12
or if they all had a setting of, say, +6 the loudness of the system
would be the same at any setting of the master volume control. The
following procedure will ensure optimised dynamic range.