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Model No. FM-5F6MB
Series: Mini-Head

Small In Size - Huge In Tone - 40 Watts of "audio dynamite"....


Price: MSRP................. $895.00

Your Price...............$695.00



The FRENZEL  "Mini Bassman" was "INSPIRED" by one of the greatest Bass - Guitar amps ever built...the Fender 5F6A Bassman. 40 watts of audio dynamite on a small chasiss loaded with features not available in the original Bassman...including a Plexi preamp for the M channel. Smooth warm Fender blues and jazz tones out of the F channel or super soaring dynamic rock leads on the M channel. 

Standard Features

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

DC on preamp and driver filaments for low noise and hum.

Star ground system to reduce induced current chassis noise    

F and M inputs with separate Gains drive a common Tone Stack and Master control. F Input voiced for the vintage smooth Fender 5F6A Bassman deep, rich, warm tones. M Input voiced for the great Marshall Plexi high  mid tones....or you can use an AB-Y switch and create your own distinct tones.

Line Out - post output transformer LINE OUT with LINE OUT LEVEL control for recording or driving a power amp, Auto switched internal load to simulate speaker if speaker is  not plugged in. Inject great tone directly into the PA system with the Microphone Simulated Direct Interface. 

Classic vintage 3-BAND TONE STACK for extended flexibility in shaping your tone. DEEP switch on Bass control. BRIGHT Switches on Gain Controls. MASTER level control so you can crank the GAIN's up and overdrive the preamp without overdriving the output tubes.

Classic Type Bassman/JTM45 Style Presence control active on both channels. 

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 matched pair of 6L6GC's in the output for fantastic headroom....and smooth blues saturation sounds.

Custom output transformer for extended lows down to 20 hz. 4 - 8 - 16 ohm speaker outputs.

Classic Fender Blonde Bassman Knobs  

Retro Vintage Cage Mini-Head - heavy duty steel mesh cage provides protection and excellent ventilation for tubes. Comes with easy carry Fender style strap handle. 

Chassis Dimensions: 12"W X 8"H X 8"D

Weight: 16 lbs

Power Output : 40 watts

***NEW FEATURE -   POWER ATTENUATOR -  Built-in passive power attenuator provides three power levels.  1/4 - 1/2 - FULL power.. 

***NEW FEATURE -  EL34/6L6 BIAS SELECTOR SWITCH -  Allows you to use either 6L6 or EL34 power output tubes.
Speaker Impedance Selector 4 - 8 - 16 ohms
5AR4 rectifier for optimum pick attack and sag...or you can use 5U4, GZ34 or Solid State Plug-In for different amounts of sag.

Primary Power Transformer Fuse
Standard IEC plug-in three prong grounded power cord.  STANDBY switch to turn off the high 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, Micalex sockets, Neutrik 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:   3 - 12AX7, 2 - 6L6GC, 1 - 5AR4  but  you can substitute 12AT7's or 12AX7's in the preamp and driver for different tones and and less preamp overdrive. You can also substitute 5881's, KT66's, KT88's, 6550's or EL34's and KT77's with EL34/6L6 bias switch.









Upgrade Options

These options allow you to  customize your amp to meet your special individual requirements.

1. EFFECTS LOOP -  pure tube buffered serial effects loop designed to perfectly match the low impedance solid-state pedal levels with high impedance tube levels. Add $75.00 

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

3. EFFECTS LOOP FOOTSWITCH - adds jack to rear panel for footswitch  control of the EFFECTS LOOP bypass switch. Includes classic heavy duty footswitch with LED. Add $60.00

4100 - 240 VOLT POWER TRANSFORMER - for operation outside the USA. Please specify line voltage. Add $75.00
5. RETRO 6SL7 PREAMP UPGRADE -  replaces 12AX7 preamp tubes with vintage 6SL7 "big bottle" tubes for the 40's-50's vintage Les Paul tones. Add $60.00

6. SOLID-STATE PLUG-IN RECTIFIER - Use this solid state plug-in rectifier replacement for 5AR4 rectifier tube when less sag and a more dynamic Marshall type response is desired.  Just switch back to the tube rectifier when sag is desired.  Add $12.00

7. DUAL RECTIFER MODE SWITCH - Provides a switch to select between a 5AR4 rectifier for smooth compression on peaks or a FRED  high voltage solid-state rectifier for sharp pick attack and dynamic bass.  $50.00  


FM-5F6MB - Jim and Team Frenzel, et al...Privileged to own three of your guitar amps. Started with a Deluxe Plus
Vibe...I picked up on ebay...using KT66's  du Tung Sol.  Best amp I've heard.  I've built amps, fixed amps and modded amps since the 60's.  Got pretty much THE amps. My vote is to award JIM the Western Electric Emeritus. I now have his Mini Bassman (which I dig in the Jim Marshall mode) and another Frenzel Deluxe Plus Vibe (which I dig in the F mode)...all with KT66's...Genalex and Tung Sol.  I play with a cord. A wood tele and two 12" Marshalls,  stacked.  Weber Alnico and Jensen Ceramic. JF, From one old radio guy to another...hey, good job.   yo ron  - Ron J. (Oklahoma)

I received my Mini Bassman last week and I am thrilled with it!  It sounds wonderful with guitar and Rhodes through 2 JBL D120Fs.  Such a natural transition from clean to overdrive, rich, shimmery sparkly tone with great clarity, just what I've been dreaming of.  It sounds so pure with bass through a 15" cab.  Even with 6v6s in it I get a stout sound.  It's everything I hoped it would be and I can't wait to hear it in the mix on stage! Thanks, you guys did great work with this one. Kenny H. (California)  

Dear Frenzel Amplification, I received the Mini Bassman Very well packed and built like a tank. After trying different combinations of tubes I found the three 12AX7 tubes, two 6L6GC power tubes and a 5U4 rectifier tube for a little more sag. The 5F6A Bassman input sounds excellent, the Marshall Plexi input sounds excellent also. When I use an AB switch to combine the inputs I discovered Tube Amp Nirvana, absolutely stellar tone to my ear. I added the Attenuator switch which comes in very handy. At the full 40 watts, this little amp is really loud. I am playing the amp through a close 2X12 enclosure with 2 Celestion Vintage 30 (16 ohm) speakers in Parallel. The amp sound great with Semi-Hollow guitars, Fender Strats, Gibson SG, Fender Telecasters. Single coils, humbuckers, P90s, Seymour Duncan rails. The amp responds very well to all types of pedals. If you are looking for a compact head, with a lot of versatility, look no further. Thanks Frenzel - Joe V.  (Ohio)

Hey Frenzel Team - Purchased a FM-5F6MB Mini-Bassman about 4 months ago. Since then I've gigged indoors and outdoors - sounds great with my 1x12 cab, LesPaul, drive pedal and touch of delay. Clean on F-channel with bright-pull engaged was pure&smooth at the blues festival yesterday. An outdoor venue - set master at 3/4, gain at 10:00, bass down & presence up - exactly what I was looking for. Surprisingly loud, fit in the mix with full 'Fendr' tone + sparkle. My thanks to Jim and the Frenzel crew - this light-weight amp is affordable quality. Robert O. (Oregon)

FM-5F6MB  - Played my first gig with the 5F6MB last night, blues&rock - what an improvement over my last amp! Sent it thru a 112 Weber spkr, I use 2 pedals:  EH echo + overdrive. Using a single-coil guitar (strat), F input is the place - Using my Les Paul, it's a mix of F and M. The M circuit removes some of the bass frequencies that come with humbucker PU's + bassman circuit, reducing the 'boomy-factor.' Tone is still there, I like the balance by setting them half & half F&M - sounds great. - Regarding  tubes in V1 preamp position...12AU7/ECC82 delivers less clip at high gain/master settings, good for jazz or anything clean - 12AT7/ECC81 or 12AX7 delivers more clip, better for blues/rock. - Seems like the 12AT7 is just right for me, at this point.  Robert O. (Oregon)

FM-5F6MB This is a fantastic little amp, really special and incredibly versatile, just wanted to let you know.  I think I'm going to build a bracket for it to mount to the fliptop, by the way.  Thanks so much!  Best, Kevin B. (New Jersey) 

FM-5F6MB  - Man, this thing is AMAZING!   Does everything I want it to, and then some.  The low end response is amazing.  Completely Satisfied, and looking forward to taking it out on gigs.  Amazing work, folks!   Amazing!  Best, Brad R. (California)

Hi Jim, "Just a little plug for Jim and the fine folks at Frenzel. My experience with them and the Frenzel Mini Bassman has been great. Out of the box it was a little too hot for pedal steel, but all I had to do was some tube swapping (a 12AT7 in V1, and a Weber Copper Top solid state rectifier) to make a great clean tube machine for pedal steel. It's got a lot of tone-tweaking features, 2 channels with different voicings, and with the way the tone stack works I can even shift the curve to put the mid scoop where it needs to be. I could not justify one of the high-end boutique amps, but this will keep me smiling for a long time!" (Built the head cabinet myself, don't blame that on the Frenzel folks!) Tommy B. (Virginia)
You guys did good!! - The Mini-bassman arrived yesterday in excellent condition while I was at worship practice.  I built the cab for it over a month ago and was able to install the amp today and it sounds great!  This is my fourth Frenzel and never a disappointment with any of them. Many thanks, John W.(Indiana)

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