User Manual

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Summit Audio Model EQP-200B

Dual Program Equalizer

Operating Manual

IMPORTANT!: CAREFULLY READ THE ENTIRE INSTRUCTION MANUAL

BEFORE HOOKUP OR OPERATION OF THE EQP-200B.

WARNING!: HIGH VOLTAGE. THIS UNIT CONTAINS NO USER SERVICEABLE

PARTS. SERVICING SHOULD ONLY BE DONE BY QUALIFIED SERVICE

PERSONNEL OR FACTORY. DO NOT OPERATE THE EQP-200B WITH THE

COVERS REMOVED.

Summit Audio

1183 Baltic Suite A

Gardnerville, NV 89410

U.S.A. Doc.# 523A00

Summary of content (7 pages)

PAGE 1
Summit Audio Model EQP-200B Dual Program Equalizer Operating Manual IMPORTANT!: CAREFULLY READ THE ENTIRE INSTRUCTION MANUAL BEFORE HOOKUP OR OPERATION OF THE EQP-200B. WARNING!: HIGH VOLTAGE. THIS UNIT CONTAINS NO USER SERVICEABLE PARTS. SERVICING SHOULD ONLY BE DONE BY QUALIFIED SERVICE PERSONNEL OR FACTORY. DO NOT OPERATE THE EQP-200B WITH THE COVERS REMOVED. Summit Audio 1183 Baltic Suite A Gardnerville, NV 89410 Copyright 1987, 1997, 2003 Summit Audio Inc. ALL RIGHTS RESERVED. Printed in the U.S.A.
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Introduction The Summit Audio EQP-200B Program Equalizer uses tube and solid state technologies to produce the warm sounds associated with tubes while providing the reliability of solid state devices. Based on a Pultec type design, the EQP-200B is a very musical sounding passive equalizer followed by a vacuum tube amplifier to overcome any gain loss. Connections are made by using three pin XLR connectors.
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THE CONTROLS 1. Low Frequency Shelf / In / Out : This three-position toggle switch selects between a low frequency 6 dB per octave shelving filter starting at 50 Hz, or standard engaged operation, or bypass mode (which disengages the filters yet still passes through the tubes). When LF Shelf is engaged the other filters are still accessible. 2. Low Frequency Boost : This potentiometer controls the amount of boost engaged for the 20, 30, 60, 100, 180 Hz frequencies.
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1. 3. 2. 5. 4. 7. 6. 9. 8. 10.
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Circuit Explanation The EQP-200B is two independent equalizers. The circuit has an electronically balanced input stage that is followed by a passive equalizer. The function of the equalizer can be thought of as three different sections. These are: a low frequency attenuate and boost section, a high frequency boost section that has an adjustable bandwidth, and a high frequency attenuate section. This type of equalizer is made of resistors, capacitors and inductors.
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Electrical Connections: (This EQP-200B is wired as a pin 2 hot device. Units made before March 1st, 2003 come factory wired with pin 3 hot.
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Note on specifications: Summit Audio is uncompromisingly committed to excellence. All of our specifications are made with the latest technology and are UNWEIGHTED measurements. What does this mean? When measurements are “weighted” (e.g. “A” weighted, dB (B), dB C weighted, etc.), the measurement devices are basically EQed or filtered before the measurement is taken. This filtering was developed so that sound pressure level (SPL) measurements can more nearly match human’s non-linear hearing characteristics.