Summit Audio EQF-100 User Manual

Important: Carefully read the entire instructions manual before hookup or operation of the EQF-100.

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 EQF-100 WITH THE COVERS REMOVED.

OPERATING MANUAL

EQF-100

FULL RANGE PASSIVE VACUUM TUBE EQUALIZER

Summit Audio Inc. 1183 Baltic Suite A Gardnerville, NV 89410 775-782-8838 phone

sound@summitaudio.com www.summitaudio.com

Introduction

The Summit Audio EQF-100 Full Range Equalizer uses tube and solid state technologies to produce the warm sounds associated with tubes while providing the reliability of solid state devices. The EQF-100 is a passive equalizer followed by a vacuum tube amplifier to overcome any gain loss. Connections are made by using three pin XLR connectors.

Features:

• Four bands of 7 switch selectable frequencies

• High and low filters, 3 frequencies each

• Balanced input

• Continuously variable boost or cut

• Individual in/out for each of the 4 bands

• Silent bypass switch

• 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 EQF-100 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. Frequency Select Selects one of seven frequencies on which the band boost/attenuate and bandwidth controls operate.

2. Gain Determines the amount of boost or cut that takes place.

3. Bandwidth Determines how much of the frequency spectrum is affected by the boost or cut operation. 0 is a narrow bandwidth and 10 is a wide bandwidth.

4. Boost-Out-Cut This switch sets the section for boost or cut; the center position turns the sections off. Note: When going between cut and out a popping sound may occur.

5. Shelving-Resonant Changes the high or low band between a shelf or peak type of response curve.

6. Low Filter Determines the low frequency cut off on the high pass filter.

7. High Filter Determines the high frequency cut off on the low pass filter.

8. Bypass Switch Removes the equalizer from the signal path but leaves the tube amplifier in the signal path.

9. Power AC power on and off.

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