McIntosh Stereotech 1 Service Manual

Page 2

SPECIFICATIONS

CABINET SIZE SHIPPING WEIGHT
23 high I3 wide l0-II/I6 deep 39 lbs.
CONSTRUCTION SYSTEM WEIGHT
#5 pound density non-resonant particle board panels. 32 lbs.
Extra heavy I inch front panel. Heavy guage 8 mil
vinyl. Simulated walnut finish. CROSSOVER FREQUENCY
SPEAKER SIZE ISOOHZ
Woofer i0 dia. frame (7-3/4 dia. radiator) IMPEDANCE

Tweeter 2 radiator

89 Nominal

POWER HANDLING: Sine wave steady state

20 50 500 L5k 20k

FREQUENCY iN Hz

Avoid operating the speaker system with sustained sine wave signals at power leveis
greater than the indicated limits. Permanent damage may result.

POWER HANDLING: Program Material

High energy peaks normal to orchestral music are easily and faithfully reproduced by
the speaker system. These peaks are of relatively short duration and do not produce
the heating effect caused by sustained tone operation. The Stereotech l speaker
system will handle up to 70 watts of orchestral music program material. Care must
also be taken to use a power amplifier that has an adequate power rating. If a low
power amplifier is used, the loudest passages may be clipped by the amplifier.
This clipping will cause the speaker to sound distorted. The large harmonic content
of a badly clipped signal can cause excessive heating and resulting damage to the
high frequency speaker element.

OUTPUT LEVEL

At l meter in a non-reflecting environment, the system will nominally produce an 89dB sound
pressure level when driven with I watt referred to 89.

LISTENING QUALITY

Smooth response has been achieved by careful design under controlled laboratory conditions.
The performance of the speakers in your listening room may be influenced to some degree by
the room size, shape, construction, and furnishing. The location of the speakers in the room
will also affect listening quality. The additional features of low distortion and wide dis-
persion will help to provide superior sound in a typical listening environment.

CONNECTIONS

Use heavy guage wire (FIB AWG or larger) when connecting the speaker system to the
power amplifier. The system leads preferabiy should have less than 0. ohms resistance
and not more than 0.8 ohms resistance. (62 feet of =l8 wire has 0.b ohms resistance.
This corresponds to SI feet of two conductor wire.)

Be sure to observe polarity when connecting the speaker system and power amplifier
leads to maintain proper stereo perspective.