Sony SQD-2020 - Page 20

20
Front | sap-2020
| amplifier
FUNCTION selector PHONO \—
MONITOR selectors SOURCE | SOURCE
MODE selectors ' STEREO | NORMAL
SYSTEM selector | ak | $., R-MTX or
[ 2-
5. Select the two-channel record which contains the loudest
sound in your record library.
6. Play the record and adjust the front amplifier volume to your
ordinary listening level. .
7. While listening to the loudest passage, find the meter which
shows the maximum deflection of the four meters. If the
meter frequently reads in the red zone, the input level will be
so high as to cause distortion in the decoder section. Adjust
the rear panel Input LEVEL ADJUST control so that the maxi-
mum defiecting meter shows O VU reading.
{l. Phasing Checks on Speakers and Amplifiers
'f you have already checked the front speaker phasing on yo.
existing system, you may skip Step 4.
lf the sound seems to lack bass notes and the position of the
instruments is obscure, the speakers and/or the front and back
amplifiers may be phased improperly. Check the phasing as
follows (refer to the illustration on page 25). :
1. Turn on the SQD-2020, and front and back amplifiers. Make
the “Input Level Adjustment” on page 18, if you have not
yet done it.
2. Select a conventional two-channel record which contains pro-
minent bass notes.
3. Set each switch as follows:
Front
amplifier SQD-2020
FUNCTION selector PHONO ae
MONITOR selectors TAPE SOURCE
MODE selectors ; STEREO MONO
SYSTEM selector | —~ oa. R-MTX or
'f you connect the back OUTPUT (LOW) jacks to the back
amplifier’s preamp section, keep the back amplifier’s switches
as follows : ,
+ When connected to tape inputs, keep the monitor selector
on “tape”.
-When connected to auxiliary inputs, keep the monitor
selector on “source” and the function selector on “aux”.
4. Check the front speaker phasing: Set the front amplifier’s
volume and balance controls to their usual position. Turn the
FRONT RIGHT and LEFT LEVEL controls fully clockwise and
the BACK RIGHT and LEFT LEVEL controls fully counterclock-
wise. Move the front speakers so that they are about 30cm
(one foot) apart and facing each other. Play the record and
turn the MASTER VOLUME controt to a comfortable level.
Listen to a recorded passage containing prominent bass notes.
Then, reverse the connection to one of the front speakers
and listen to the same bass passage again. If it now sounds
like there is less bass, the speakers were correctly phased
and the original connection should be restored. However,
if the bass appears to have increased, the speakers were
originally phased incorrectly and the new connection should
be used.