Power Acoustik PWM-20 User's Manual
Contents
1. TURN THE KNOB CLOCKWISE S NIVS LAdNI TO GAIN THE INPUT LEVEL yo A Power PWM 20 TURN THE KNOB COUNTER CLOCKWISE TO CUT DOWN PWM 18dB PARAMETRIC EQUALIZER THE INPUT LEVEL IM ELECTRICAL INSTALLATION CD CHANGER RADIO CASSETTE ha TER FRON REMOTE Batt 12V GROUND i SUBWOOFER REAR Xu SPEAKER BI H FRONT SPEAKER NOTES Set your source volume at one half to three quarter up and leave it Always use the volume control as a master main volume control It has better electronics higher S N radio and is more linear than any source unit volume control available If engine noise is audible check the ground connection on all units in the audio system AVHOVIG dILVNS3HIS ZHO0 002 ga Ni 401 fi Bina anya BOLHA L i a s Co z Oz R Ag NOO 3 sie agya 318 ws ry A Mr id 19 J t ZHOS I 09 8 met mS a MU i l vo 129 Lq 3 8 0 68 L 33 AOS 3 ng dj a i 93 tib ADE TE 0 L AQDL 8 MOQLI OG8 04095 0 MLS i 3 13 ue 8x00 13 uit til aca THA dis Bee l 915 fit a asya 3 23 5 023 918 913 ET n i H NS GUI Bit 91452. AOS BTA ia 5 48 80 aos AQG NG mit 4 li ATI eku LLI LLI 13 AU NDZZ 19 z Mir frem ica P 5 klode n ee 110978 ca iva 4 EE te 19 rd need Me 1 i l f git l ols 11 ut 20 62x ACE KE ACL r AA fei 91 nort mno aroos 613 angos kid za 623 FIA 153 55 x002 x002 1008 03 ao 76 Iry Aces 17005 AOG MEe Sta 123 G 29405110 9 aos nir 63 12 Wi tra 101 xl MOL XO 6 1071 WZLYA VELA 8 YENA Oe miei 7u00 00z 1NOS1 08 o Ki ww i m 1 m ra C C F T sot FIKA AMNH ab AGS 13 113
3. Cut 3 Adjustable Center Frequency Control on the front panel 4 Low noise BI FET op amp design yields minimum distortion 5 On board 30V bi polar switching power supply 6 Subwoofer outputs and level controls 7 Subwoofer frequency adjustable 8 Input selector for Radio or CD 9 Universal half DIN chassis for ease of installation 10Gold plated RCA input output connectors 11 20dB headroom eliminates signal overload E FRONT PANEL CONTROLS Power eens BASS MID BASS MID HI O 180Hz TE z one 25042 F R f0Hz 150Hz fEKHz VOL FAD SUB VOL B SUB FREQ CUTIROOST gt FREQ PWM 20 1 INPUT SELECTOR SWITCH This switch selects the radio or CD input 2 MASTER VOLUME CONTROL Turning the outer bigger knob to adjust the volume between the front and rear speakers in a 4 speakers system Turning the smaller knob to adust the output level 3 SUB WOOFER CONTROL Turning the outer bigger knob to adjust the sub woofer frequency Turning the smaller Knob to adjust the output level of sub woofer RCA jack 4 BASS MID BASS MID HI CONTROLS Turning the outer bigger knob to adjust the center frequency of each Band Turning the smaller knob to boost or cut the selected frequency E CD RADIO INPUT GAIN CONTROL EE PE H 1 H 1 4 1 1 L yvay d L nous 4 L 4 L a 4 Lino ans L iIndino t L indni 0000 THE CD RADIO L R CHANNEL INPUT CAN BE ADJUSTED FROM THE TOP COVER Pa
4. W A Power 4500S 04 MODEL PWM 20 4 BAND PARAMETRIC EQUALIZER WITH SUBWOOFER ELECTRONIC CROSSOVER EQUALIZADOR PARAMETRICO DE 4 BANDAS CON SUBWOOFER Y CROSSOVER ELECTRICO OWNER S MANUAL MANUAL DE INSTRUCCIONES E SPECIFICATIONS 4 VARIABLE FREQUENCY RANGES e BAND1 60 150Hz BAND2 200 400Hz BAND3 1 2 2 5KHz BANDA 7 5 15KHz SUB WOOFER CROSSOVER FREQUENCY gt gt gt 30Hz 250Hz BOOST CUT Pepin ed ae tas teh Nr 18dB SIN RATIO sp 11548 REF 1V INPUT FREQUENCY RESPONSE tr cc 20Hz 25KHz MAXIMUM OUTPUT VOLTAGE nose er ee eee teres 8V RMS THD mil ge Telnaes Ga hk cae oy Bg She ST he TS te SS Se es SG 0 05 NOT SENSITIVITY PP i ey ORA os 300mV 2V HEADROOM riss peeked Kaeaea othe thas 20dB INPUT IMPEDANCE in bie Ma 10K OHMS STEREO SEPARATION ss 82dB 1KHz OPERATING VOLTAGE HF 11 15V NEGATIVE GROUND OUTPUTIMPEDANGE ae 50K OHMS SIZE HxWxD ccc tee 178x27 5x115mm DUE TO OUR CONTINUING EFFORTS TOWARDS PRODUCT IMPROVEMENT THE ABOVE SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE Mm 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 disceming audiophiles who rely upon our products This manual has been prepared to help you max
5. imize your enjoyment of the outstanding performance and multiple advanced features of this unit To fully realize the exceptional performance this product is capable of it is necessary that all signal sources amplifiers and speakers are of the highest qualify E 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 IC 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 15 the first production preamplifier to incorporate a ae ai bandwidth parametric equalizer with 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 E FEATURES 1 Volume control with up to 8 volts RMS of output 2 Four band parametric equalizer with 18db boost
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