Harman Kardon 100+ - OPERATING PROCEDURES AND CONTROLS; REAR AND BOTTOM PANEL SWITCHES; FRONT PANEL CONTROLS OVERVIEW

SPEAKER PHASING
For maximum enjoyment of multichannel sound, it is important to have the
four speaker systems in phase. The phase relationship must be correct, not only
between the front left and right speaker systems, the back left and right
speaker systems, but also between the front and back channels.
When connecting each speaker system to the receiver, be certain to main-
tain plus and minus polarities.
If your speakers do not have a plus/minus polarity identification, phasing
can be accomplished by the following procedure:
1. After connecting your speakers, place the receiver in the MONO mode of
operation and the SOUND FIELD BALANCE control to the exact top center
position.
2. Play a record, tape or FM broadcast which has a single speaking or singing
voice, or a solo instrument.
3. The voice or instrument should appear to be emerging from an area some-
where in the center of the two speakers. If the voice seems to come from
both speakers independently, the speakers are out of phase.
4. If you determine that your speakers are out of phase, merely disconnect
the leads from only one of the speakers and reverse them. Your stereo system
will now be in phase.
This completes the phasing of a pair of speakers for stereo operation.
Repeat this process for all additional pairs of speakers in your system.
OPERATING PROCEDURE
Every control on this receiver serves a specific and useful function and
is important for the proper operation of your stereo or 4-Channel system.
Read this section carefully so you can take full advantage of all the per-
formance capabilities of this receiver.
SWITCH- REAR PANEL
STEREO/ 4-CH SWITCH
The 100 + receiver is shipped with the STERE0/4-CH switch in the 4-CH
mode. A special safety latch is fitted next to the switch to prevent throwing
the switch accidentally while the receiver is turned on.
If you plan to use the 100 + as a DOUBLE-POWER STEREO receiver, first
turn off the unit, remove the safety latch and throw the STEREO/ 4-CH switch
to STEREO. NOTE: After changing position of this switch ALWAYS replace the
safety latch.
The two front channels now have the capability of delivering double power
to your speakers. ·
NOTE: WHEN THE STERE0/4-CH SWITCH IS IN THE STEREO POSITION THE
BACK SPEAKERS ARE INOPERATIVE. IF YOU WISH TO USE THE RE-
CEIVER TO POWER ANY BACK SPEAKERS, FIRST TURN OFF THE RE-
CEIVER. REMOVE THE LATCH AND THROW THE STERE0/4-CH SWITCH
TO 4-CH. REPLACE THE PROTECTIVE LATCH.
SWITCHES - BOTTOM PANEL
MUTING ADJUSTMENT CONTROL
This bottom panel control adjusts the level at which muting action will take
place. Minimum muting action occurs in the full counterclockwise position.
Maximum muting is achieved in the full clockwise position.
The full clockwise position will also eliminate stations with poor trans-
mission quality. The control should be adjusted to the point where you receive
only those stations which meet your standards of broadcast quality.
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STEREO THRESHOLD CONTROL
This control can be adjusted to determine the number of stereo stations
the tuner will reproduce in the STEREO FM position of the Function Switch.
In the full counterclockwise position, the automatic switching circuits have
maximum sensitivity and all stereo stations within the range of the tuner will
be reproduced. However, due to weak signals (or their distance from your
antenna) some stations will contain noise levels which degrade performance
when reproduced in stereo. In order to reproduce these stations monophonically
(when in the STEREO FM position of the Function Switch), rotate the STEREO
THRESHOLD control clockwise until only good quality stereo stations are
reproduced.
SWITCHES AND CONTROLS - FRONT PANEL
POWER SWITCH
The POWER switch performs the function as its name denotes. It supplies
power to the receiver. When the pushbutton is depressed to turn the set ON
the power light will illuminate.
HEADPHONE JACKS
The stereo or 4-CH headphone receptacles located on the front panel of
your 1 00 + receiver will accept any type of headphone. Stereo phones come
with a single plug which should be connected to the FRONT receptacle. 4-CH
phones come with two plugs. Connect the front plug to the FRONT receptacle
and the back plug to the BACK receptacle. The headphone receptacles are
"ON" at all times. To listen only to yo,ur phones without having your speakers
on, merely set the SPEAKER switches on the front row of pushbuttons to "OFF".
MAIN SPEAKER SWITCH
In order to hear the speakers connected to your main system, the respective
FRONT and BACK MAIN speaker switches must be depressed.
When in the "ON" position the speakers connected to the main system are
"ON". Should you desire to listen to stereo or 4-CH headphones alone, the
speakers can be turned off at your discretion.