Offered for sale;
Used Genz-Benz Tube Works TD-752 guitar combo amp serial number 033949.
This amp is in very good condition, fully functional and cosmetically very nice. The speaker has been replaced with a non-original Fender Eminence unit.
These amps were produced in the mid 90’s and are some of the earliest solid state / tube hybrids.
BK Butler / Butler Audio known for their “Tube Driver” and “Blue Tube” pedals, sold the company to Genz-Benz. This TD-752 is an early combo hybrid made after the change in ownership.
Featuring 2 channels, Distortion and clean. They both have their High, Mid, Low and Master Volume controls.
The Distortion channel utilizes a 12AX7 tube and also has a Drive control. The distortion sound is quite good with lots of gain.
The clean channel is really a solid-state channel and does not utilize tubes, it does put out a lot of gain for an amp rated at 100 watts.
Cool hybrid amp for a sweet price!
“We test every used amp and pedal when we buy it and bring it up to our standards before we offer it for sale. Then we burn it in for an hour or so before we ship so that there are no surprises.”
The Tube Works owner’s manual states:
FRONT PANEL FEATURES
TUBE DRIVE SWITCH — Selects either TUBE Channel (up), or CLEAN Channel (down). Red LED indicates Tube channel is on. Footswitch jack insertion (rear panel) cancels the operation of this switch.
CH. 1 & 2 SWITCH — When this switch is in the "up" position, both channels (Tube and Clean) may be paralleled and will be heard together when the Tube Drive switch is set to the Tube Drive position (up). With Ch. 1 & 2 switch up and Tube Drive switch set for Clean channel (down), only the clean channel will be heard. When Ch. 1 & 2 switch is in the "down" position, the Tube Drive switch will select separately between Tube and Clean channels.
INPUT JACK — Extremely wide-range input allows plenty of headroom for all types of guitars.
TUBE DRIVE — Adjusts the amount of gain that drives the tube. Careful attention has been given to produce the most overdrive/sustain possible without creating unnecessary noise and feedback.
RED LED — Indicates that the Tube Drive channel has been selected.
TUBE MASTER — Adjusts the amount of output volume from the Tube Drive Channel.
HI, MID, LO — Classic, passive 3-band E.Q. to enhance the Tube Driver's unique tonal response.
Frequencies: Hi 3.5 KHz (upper shelving)
MID 800 Hz (center)
LO 150 Hz (lower shelving)
CLEAN GAIN — Adjusts gain level of clean channel. Although this channel is all FET, extremely warm tubey tonality is produced thanks to the MosValve power section. Lows are especially well-balanced.
HI, MID, LO — Identical operation and frequencies to Tube Drive channel, however the over-all baseline E.Q. has been optimized for clean and rhythm styles.
REVERB — Adjusts amount of reverb signal is mixed into the output. Reverb can be cancelled anytime by the footswitch, or by turning the control to "0".
POWER — Supplies mains power to the amp. Be certain that the proper voltage is supplied to the amp. The proper voltage for your unit is indicated just below the fuse holder on the rear panel.
REAR PANEL FEATURES
POWER INPUT CORD — Heavy -duty cord supplied to the requirements of your local. In USA: Connect only to 110-120 VAC, 60 Hz. Always use grounded outlet (3 terminal) to avoid operating problems and to increase safety margin.
FUSE — Use fast-blo 4 Amp for 120 VAC or 2 Amp for 220-240 VAC models. Always replace with the same type and size fuse.
SPEAKERS — Connect only to speakers. Either 2 - 8 ohm or 1 - 4-ohm speaker or cabinet combination. Combo amps:
The speaker supplied is 8 ohm, enabling you to add one more extension 8 ohm speaker without damaging the amp.
Minimum total impedance is 4 ohms. Lower impedance operation may eventually overheat and damage the amp voiding warranty.
LINE OUT — Attenuated signal from the output of the amp. All the tone of the amp, including the output is available at this jack. Potential applications: Slaving to other combo or power amplifiers and recording.
FOOTSWITCH — Stereo-type jack which switches both Channel and Reverb. Tip of the jack is Reverb; ring is Channel.
Note: Electronic and MIDI switchers - Channel switch is VC positive to ground. Reverb is simple shorting
EFFECTS SEND — Proper send level for most effects devices. Connects to the "in" or "guitar” jack of your effects. Can also be used as a D.I. (Direct Input) to a mixing console or recorder.
EFFECTS RECEIVE — Unity buffered input from effects devices. Connects to the “out” or "amp" jack of your effects.
Can also be used as a direct Power Amp section input. NOTE: A common problem many enc ounter while using effects devices is "ground loops". A ground loop is often caused when an effects device, mixing board or tape recorder equipped with a 3-prong AC cord are connected together with audio cables. The electrical difference between the AC ground (at the AC plug) and the signal ground (audio cords) is amplified. This may result in increased hum levels and in some cases high-pitched squeals or oscillation at high gain settings of the amp. The solution is often to use the same outlet strip for all equipment rather than plugging into various separate outlets. In extreme cases it may be necessary to isolate the AC grounds. If this is attempted, consult a qualified technician to insure safety. Tube Works cannot recommend the disabling of any 3rd prong grounding plugs.
*Please note: we do our best giving descriptions of used pieces. We have found it impossible to describe every mark on an instrument or amp that is not in the "mint" category. Also, what's important to you may not be important to someone else. For example, you may say, "I don't care what it looks like as long as it plays or sounds well." Another person may say, "Body cosmetics are very important to me so tell me about every scratch, nick and blemish." So, please ask the questions that are most important to you. If you ask they will be answered. They are free and there's no limit. Additional photos can also be made available.
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