Super Deluxe Reverb

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Super Vibe Reverb
Super Vibe Reverb


FM-763 "Super Vibe Reverb"

One of a kind classic that has it all! F and M preamps modulated by that groovy vibrato tremolo sound of the 60's and the smooth warm reverb that you can only get with a pure tube driven long tank Accoutronic reverb coil !


Shown With Rackmount Roadcase Cabinet

Model:  "Super Vibe Reverb" 

Model No: FM - 763 

The FRENZEL FM - 763 "Super Vibe Reverb" was inspired by the vintage Fender AB763 Vibroverb, but it is much more than a clone. It has many added features developed over 50+ years of building custom amps for touring professional musicians all over the world. This amp will produce tones that you have only dreamed about! See complete features list below.


Input Jacks isolated from chassis for low noise, eddy currents, and hum.

Classic Knurled Knobs, Toggle Switches and Jewel Pilot Light

DC on filaments for low 60 hz hum.

Star ground system to reduce induced current chassis noise.

Normal (Type F) Bright (Type M) inputs with separate preamps and Gain controls for the unique smooth vintage Fender warm tones or the Marshall great high mid tones....or you can use an AB-Y switch and create your own distinct tones.

Classic 60's JTM45 - Bassman 5F6 style 3-BAND TONE STACK for extended flexibility in shaping your tone.

MASTER level control so you can crank the GAIN's up and overdrive the preamp without overdriving the output tubes.

Classic Type 5F6A Style Presence control .

Unique NNFB "Edge" switch on the PRESENCE control that transforms the power amp section into a No-Negative-FeedBack style amp for more open, less compressed tones.

Class AB fixed biased 6L6's in the output in place of the original Deluxe cathode biased 6V6's to give you more power and headroom.

Preamp and driver tubes are 12AX7 but you may also use 12AT7's or 12AU7's for different tones and overdrive.

Post output transformer LINE OUT with LINE OUT LEVEL control for driving a higher power amp, or recording. Has an auto switching internal load if speaker is not connected to give you loaded output distortion. 

Tremolo - with Speed and Depth Controls for those cool jazz vibes.

Reverb - Classic tube driven long tank reverb for those great blues tones!

Footswitch pedal for Tremolo

Footswitch pedal for Reverb

A classic customed design output transformer for extended low and high frequency performance....deep bass....crystal clear highs and features 4 - 8 - 16 ohm outputs selectable by a rotary switch.

Power Output: 50 watts RMS

Three Power Levels-  Built-in power attenuator provides three power levels. 1/4 - 1/2 - FULL 

5AR4 rectifier for the classis Fender sag,.. or use a Solid State plug-in rectifier for Marshall super tight no sag tones.

IEC power connector for plug-in three prong grounded power cord.

STANDBY switch to turn off the plate voltage during warm-up.

Rock solid point-to-point hand wiring using only the best of parts...low noise tubular polypropylenes caps, metal film resistors, ceramic sockets, switchcraft jacks...etc.

Sweet vintage clean to classic overdrive tones with three different types of distortion depending on whether you are overdriving the preamp, output... or both!

Tube complement: The amp comes standard with 5 - 12AX7, 1- 12AU7, 2 - 6L6GC, 1 - 5U4, but you can substitute 12AT7's or 12AU7's in the preamp and driver for different tones and overdrive sounds. You can also substitute 5881's, KT66's, KT88's, 6550's  in the output stage for different sounds.

Weight: 25 lbs.





MSRP.............................................. $1595.00

"Super Deal" Sale Price.................................$1195.00


Custom Upgrade Options - These options allow you to  customize your amp to meet your special individual requirements.

1. SUPER 40 QUAD OF 6V6'S - Four 6V6's in place of the pair of 6L6's for 40 watts of smooth warm 6V6 tones. Add $100.00

2. SUPER 100 QUAD OF 6L6'S - Four 6L6's in place of the pair of 6L6's for 100 watts of "audio dynamite". Add $300.00

3. 100 - 240 VOLT TRANSFORMER - for operation outside the USA. Add $55.00   

4. EDGE FOOTSWITCH- adds jack to rear panel for footswitch remote control of the NNFB EDGE switch. Includes classic heavy duty footswitch with LED. Add $60.00  

5. RETRO FM-5A3 RSD Retro Super Deluxe (6SL7 PREAMPS)  -  replaces 12AX7 preamp tubes with vintage 6SL7 "big bottle" tubes for the 40's-50's vintage tones. Add $60.00

6. EFFECTS LOOP -  Classic 60's style insertion type Serial Effects Loop with Return Jack (Power Amp In), Send Jack (Preamp Out), and  Send Level Control with hard bypass pull switch.   Ad
d $50.00.

7. JCM800 PREAMP - Replaces Plexi preamp with high gain JCM800 preamp.  Add $50.00

- Please see our Cabinets  page for a variety of custom built cabinets and enclosures.

REVIEWS A sample of our reviews is shown below. For more reviews please check out our Feedback & Reviews page.

Hey Jim - I am very happy with the amp - so far I've run a les paul and a tele through it, and it has nailed every sound I wanted it to. With the Master Volume and attenuator function, I am able to dial in any gain sound I want, and use the guitar's volume to control gain, which means I won't have to re-learn how to get 'my sound' every time I set up in a different sized room!  I can use one amp for any practice or gig I am likely to get.   Proud owner of FM-763!  Dave D. (Colorado)

Telecaster Guitar Forum Review - The Super Vibroverb is loosely based on a Fender Vibroverb, but with some added features. It is a 40w head, with a built in attenuator which can cut power to 1/2 or 1/4 settings, and has tube Tremolo and a tube driven accutronix reverb tank.

I tested it out with a JD tele with Cavalier pickups and a Les Paul with '57 pickups. The cabinet I played through is GK 4x10 bass Cabinet with two Pyle driver bass speakers and two Eminence Ramrods.

I am actually shocked by the versatility of this amp - in full power mode it has a ton of clean headroom and really picks up subtle adjustments to the pick attack, guitar volume and tone controls. It has two inputs, labeled 'F' and 'M,' each of which has a gain control, and a master volume that controls both. With the gain, master and attenuator, I can dial in the sound I want with the gain/master and then adjust the output depending on the size of the room, basically allowing you to choose your blend of preamp and poweramp breakup at any volume you like (well, maybe not ANY volume..)

The tremolo has rate and depth controls, and seems to be able to hit fluttery surf stuff and choppy Link Wray style stuff easily. The reverb is very musical sounding, and seems very usable at all levels.

I've played around with attenuators before, and used a few amps that had a pentode/triode function to reduce power, and all of them seemed to lack something tonally at lower settings. I won't say this one is perfect, but it is the best I've tried, and I think if I was using a lower power cabinet (my 4x10 can handle 300w) it may have been less noticeable. On the 'F' channel, it was not very noticeable, but the 'M' channel seemed to get a little more flat as I brought it from 40->20->10w output. I think this is because the M channel has a lot more Mids than the F (which is fairly scooped, as it should be). It was certainly not enough to prevent me from using the setting in either channel, in fact I think I might have been looking for something to gripe about so am not just bragging about how cool my new amp is. Because it is pretty damn cool - with a few knob twists I can go from saturated, compresssed pure overdrive to bright sparkling cleans.

It wasn't exactly cheap to buy, but for a hand-wired amp with tube reverb and tremolo it is pretty reasonable. Jim Frenzel has been very responsive to my emails, and all in all I am VERY pleased with my buying experience. It did take about 2 months from when I ordered it until it arrived, but I knew that when I ordered it, so I can't complain about that!  Despres - Tele Meister


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