Power Acoustik PWM-70 Owner's Manual page 2

ENGLISH
■ SPECIFICATIONS
FREQUENCY RANGES
BOOST/CUT.
S/N RATIO .
FRONT CHANNEL: 125Hz, 500Hz, 3.5KHz, 12KHz
REAR CHANNEL: 50Hz, 600Hz, 6.3KHz A
18dB
115dB REF IV INPUT
FREQUENCY RESPONSE
■ •
MAXIMUM OUTPUT VOLTAGE
THD.
INPUT SENSITIVITY .
HEADROOM .
INPUT IMPEDANCE .
STEREO SEPARATION .
OPERATING VOLTAGE .
OUTPUT IMPEDANCE .
10Hz- 15KHz, +/- IdB
8V RMS
0.05%
150mV
20dB
10KOHMS
82dB/1 KHz
11-15V NEGATIVE GROUND
50KOHMS
SIZE (HxWxD) . 27.5x178x115mm
* DUE TO OUR CONTINUING EFFORTS TOWARDS PRODUCT IMPROVEMENT , THE ABOVE SPECIFICATIONS
ARE SUBJECT TO CHANGE WITHOUT NOTICE.
INTRODUCTION
Congratulation on your purchase of your new preamplifier equalizer. Our sonic excellence is considered our
most important objective. Your selection of this component tells us you desire to achieve the same goal.
Welcome to the rapidly expanding group of discerning audiophiles who rely upon our products.
This manual has been prepared to help you maximize your enjoyment of the outstanding performance and
multiple advanced features of this unit. To realize the exceptional performance this product is capable of, it is
necessary that all signal sources, amplifiers, and speakers are of the highest quality.
■
EQUALIZER BACKGROUND
There are basically three types of equalizers: graphic, parametric, and a hybrid of these two, often referred
to as paragraphic. Additionally, there are passive equalizers, which have no gain, active gain preamps, which
have a gain stage usually with a volume control, and booster equalizers which we won't consider here since they
are inferior passive equalizers with inexpensive 1C amplifiers built-in..
As in state-of-the-art home audio systems the optimum system requires a dedicated preamp with
enormous gain to drive the various power amplifiers. Since home audio amplifiers do not have adjustable
sensitivity, and require high output preamplifiers to drive them to maximum levels. ^
This unit is the first production preamplifier to incorporate a specific bandwidth parametric equalizer wilH
adjustable Center Frequency Control on the front panel. With 18db boost or cut on its four bands, it can
compensate for acoustic anomalies unique to the automotive environment. This unit easily becomes the
"Mission Control Center" of any high end automotive sound system.
I