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TECHNICAL MANUAL
DESIGN PHILOSOPHY
With many years of experience designing and manufacturing both bass guitar speaker cabinets and amplifiers, it
became obvious that there is a large market for a bass amplifier line that reproduces the natural tone of the
instrument itself, while allowing for personalization of tonal texture.
As with our speakers, Genz Benz amplifiers are designed to maximize your instrument's natural tone and feel
without imparting additional unwanted coloration or reducing impact and playability. This results in an amplifier that
will always be true to your instrument's basic natural qualities and your personal tonal signature.
The circuit design, features, and physical construction have been carefully developed to give you, the experienced
player, the best performance in bass guitar amplification. Featuring sturdy jacks and controls, premium 12AX7 TUBE
and solid state FET front end pre-amps, tuner output, mute switch, active/passive switch, foot switchable channels
and shaping filters, dual 5 band active EQ, balanced direct output, and an industrial duty bipolar power amplifier with
toroidal power transformer. The Genz Benz GBE 750 bass amplifier gives you the tools and versatility necessary to
sound your very best on stage.
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Table of Contents
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Summary of Contents for Genz Benz GBE 750
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Page 1: Design Philosophy
5 band active EQ, balanced direct output, and an industrial duty bipolar power amplifier with toroidal power transformer. The Genz Benz GBE 750 bass amplifier gives you the tools and versatility necessary to sound your very best on stage. -
Page 2: Technical Information
TECHNICAL INFORMATION The first stage of the GBE 750 preamp uses a low noise BI-FET linear scaling amplifier with a 2 pole low cut point at 23 Hz to prevent excessive speaker cone excursion and intermodulation distortion. Additional bandwidth roll-off is provided at 20 KHz for RFI suppression. - Page 3 Active 5 Band Equalization — The “active 5 band equalization” used in the GBE 750 amplifier is composed of 1 shelving low frequency control, 3 peaking midrange controls and 1 shelving high frequency control. These filters are...
- Page 4 High Frequency - 4000 Hz and above Global Signal Shaping Switches and Controls — There are 3 separate shaping filters on the GBE 750. The “L.F. EXTEND” (low frequency extend) lowers the low frequency roll-off response of the preamp (between 30 and 45 Hz) to allow the full effect of 5+ string and extended scale instruments.
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Page 5: Back Panel
“PRE” position will be somewhat lower than in the “POST” position. Foot Switch — The GBE 750 is fitted with a 6 pin DIN jacks for the 5 button footswitch (included). In order for the footswitch to function correctly, the amplifier’s front panel switches for these functions must be in the “out” position. -
Page 6: Specifications
•This amplifier should not be exposed to dripping or splashing and no objects filled with liquids, such as vases or drinks, should be placed on this product. •The GBE 750 amplifier should be connected to a mains socket outlet (power receptacle) with a protective earth (ground) connection at all times. -
Page 7: Declaration Of Conformity
•In addition, by use of this device, the user agrees to hold Genz Benz and its designers, sales agents and all other affiliates and related parties harmless in the event of any accident, injury, damage or loss resulting from such use.
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