Hafler PRO 1200 Service manual

Page 1

INSTALLATION

OPERATION

Please refer to thls serlal
number in all communicallons
regarding this equipment.

Page 2

Serial Num: G 1CA1ZGOOOO45

SPECIFICATIONS

POWER RATING:

Less than 0.01% total harmonic distortion at any power
level up to 60 watts continuous average power per channel
into 8 Ohms at any frequency between 20Hz and 20 kHz
with both channels driven. 170 watts into 8 Ohms at less
than 0.01% THD from 20Hz to 20kHz in monophonic
bridged position.

IM DISTORTION (IHF):
Less than 0.005% from 1 to 60 watts, each channel,
into 8 Ohms.

TYPICAL THD AT 60 WATTS INTO 8 OHMS:
20 Hz: 0.002%
1 kHz: 0.002%
20 kHz: 0.006%

FREQUENCY RESPONSE INTO 8 OHMS:
-3dB, 4H2 to 200kHz at 1 watt.
+0dB, -0.5dB, 10Hz to 40kHz at 60 watts.

TYPICAL CHANNEL SEPARATION:
20Hz: >75dB
lkHz: >85dB
20kHz: >65dB

SIGNAL TO NOISE RATIO, UNWEIGHTED:
Exceeds lOOdB referred to 60 watts into 8 Ohms.

INPUT IMPEDANCE: 22.000 Ohms

INPUT SENSITIVITY for 60 watts into 8 Ohms:
Unbalanced: 1.6 volts RMS
Balanced: 0.8 volts RMS per phase

DAMPING FACTOR:
100 to lkHz into 8 Ohms, 50 to 10kHz into 8 Ohms.

POWER CONSUMPTION:
60 watts both channels into 8 Ohms: 600 VA
Quiescent: 60VA

SIZE: 3 1/4" high plus 1/2" feet, 19" wide, 9 1/2" deep,
plus 1 l/ "for handles.

NET WEIGHT: 18 lbs.
SHIPPING WEIGHT: 20 lbs.

ALL SPECIFICATIONS SUBJECT TO CHANGE
WITHOUT NOTICE.

© Copyright 1992. All rights reserved

INTRODUCTION

The Hafler PROIZOO is a two channel medium power
audio amplifier which has been engineered to meet high
performance and reliability standards while maintaining
affordability.

The amplifier employs a sonically proven circuit topology
driving MOSFET output devices. These devices provide
exceptional reliability as a result of their inherent rugged-
ness and resistance to abusive operating conditions. Con-
sequently, the PR01200 is capable of delivering high
current into low impedance loads, and generally the ampli-
fier will not be damaged in the case of accidental short
circuit at the output. The drive circuitry is a simple and
effective arrangement using high quality components to
ensure longevity and, above all. sonic excellence.

INSTALLATION

VENTILATION

Adequate air flow is important to the continuing reliability
of any power amplifier. Cool air must be able to circulate
freely through the perforations in the cover and under the
chassis, and around the heatsinks. It is expected that the
amplifier will always be resting on its feet. which should be
on a hard enough surface that air flow underneath will not
be obstructed. If the amplifier is mounted in a rack, or
through a panel, the feet may be removed so long as
adequate ventilation is provided through the bottom open-
ings. It is normal for the cover and heatsinks to become
warm during use.

MOUNTING

The front panel is designed to fit a stande 19" rack at 3,5"
intervals or alternatively the unit may be stacked. The feet
may also be removed if desired when rack mounting.

LINE CONNECTIONS AND SWITCHING

The PR01200 is normally wired for use on 120V AC power
lines, as in the USA. If your line voltage is different, you
need the special Hafler export power transformer which
accommodates many other line voltages. Be sure your
amplifier is wired for your line voltage before you plug it
1n.

The PROlZOOs power switch may be left on, and the
amplifier switched remotely by connecting its line cord to
a pre-amplifier (or other control center) which provides a
switched 3-way AC outlet. Make sure that the control
device can supply a current of 5 Amperes to the PR01200,
in addition to the current required by any other switched
units. You may instead connect the amplifier directly to a
wall outlet and control it with its own front panel power
switch.