Summit EQP-200B Operating Manual

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

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.

Features:

• Two independent channels

• Switch selectable frequencies

• Passive I/O circuits

• In/out/shelf switch

• Extended frequencies and LF shelf

• 105 dB dynamic range

• 990 output stage (balanced or unbalanced)

• Three year warranty

• Transformerless signal path

• Hand crafted in the USA

Having found this manual, carefully unpack the EQP-200B and its power cord. Save the carton and packing material should it be needed for future shipping. Before powering the unit, read this manual, observing the cautions for high voltage. Proceed by doing the following:

• Set the line voltage switch to the proper position

• Determine the proper fuse size by referring to the specifications

• Check for pilot lamp illumination when powered up

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. Maximum boost (a setting of 10) is about 16 dB.

3. Low Frequency Cut : This potentiometer controls the amount of cut engaged for the 20, 30, 60, 100, 180 Hz frequencies. Maximum cut (a setting of 10) is about 20 dB.

4. Low Frequency Select : This five-position rotary switch selects between frequencies of 20, 30, 60, 100, and 180 Hz for which the low frequency boost and cut controls have effect.

5. Mid-High Frequency Select : This eight-position rotary switch selects between frequencies of

1.5k, 3k, 5k, 8k, 10k, 12k, and 16k Hz for which the mid-high frequency boost control has effect.

6. Mid-High Frequency Boost : This potentiometer controls the amount of boost engaged for the

1.5k, 3k, 5k, 8k, 10k, 12k, and 16k Hz frequencies. Maximum boost (a setting of 10) is about 20 dB.

7. Mid-High Frequency Bandwidth : This potentiometer controls the “Q” or bandwidth associated with the boost engaged for the 1.5k, 3k, 5k, 8k, 10k, 12k, and 16k Hz frequencies. It is important to note that minimum setting (0) imposes the tightest filter and a maximum setting (10) imposes the broadest filter. When set for maximum bandwidth, the mid-high frequency boost is limited to boost of about 10 dB.

8. High Frequency Cut : This potentiometer controls the amount of cut engaged for the 5k, 10k, and 20k Hz frequencies. Maximum cut (a setting of 10) is about 17 dB. The slope of the filter is 6 dB per octave.

9. High Frequency Select : This three-position rotary switch selects between frequencies of 5k, 10k, and 20k Hz for which the high frequency cut has effect.

10. Power : This switches power on and off. Note that the red pilot lamp is illuminated when the unit is on. (It is possible that over time the bulb in the pilot lamp may burn out, in which case the unit is still operational, but you won’t be able to tell from the pilot lamp if the unit is on. Please contact Summit Audio authorized dealers for bulb replacements.)

[Note: The two channels operate as dual mono. Thus, the top controls have no effect

on the bottom channel and vice versa.]

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