Genz Benz Bass Amplification:: Bass Heads; Streamliner, 900W at 4ohm, STM600, STM900 :: Basses, Amps, Lightweight, Digital, MOSFET, Tube,, 12AX7 :: For sale, UK, EU, Bassdirect


≥Amp Heads | Cabs | Accessories

Shuttle 6.2 | Shuttle 9.2 | Shuttle 12.2 Max | >Streamliner | Shuttle 9 Max


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The new Streamliner™ design from Genz Benz is taking the lightweight amp design into a new arena, using the superb class D technology perfected by Genz and combining a new preamp section.. The 300 volt All Tube Class A preamp design is driven by three 12AX7 preamp tubes utilising six gain stages. The preamp design features an intuitive and highly effective tone network which is a unique blend of a modified passive Baxandall network for the bass and treble along with an active tube driven mid filter with selectable mid frequencies. The versatile all tube preamp exudes a fat and rich tone that remains articulate. It can be used to simply add warmth to your natural tone or it can be dialled in to provide a wide range of natural tube overdrive.

Along with our preamp design that rivals that of many classic tube amplifiers, the STREAMLINER™ amps also features our proprietary 3 Dimensional Power Management analogue technology. Our 3DPM™ adds heft and girth to each individual note, while enhancing the amplifiers responsiveness and headroom. It provides the dynamic and 3 dimensional tone and feel of an all tube power amp design.

With its solid extruded aluminium panels, CNC machined solid billet aluminium faceplate and smooth-radius edges the STREAMLINER™ 900 chassis emanates the ruggedness and strength of a world-class touring machine. This brushed aluminium chassis is finished in an anodised Tungsten finish.

The powerhouse behind the Streamliner™ is a Class D amplifier and SMPS module, enhanced with our Patent Pending P.H.A.T. (Proprietary Heat Abatement Technology) topology. This delivers robust and reliable, high output performance in a tremendously compact and convenient package.

Simply put, this new design offers a more streamlined approach to finding your voice, yet it still carries forth the GENZ BENZ reputation for performance, reliability and innovation.


  1. STM 900 - 500 Watts @ 8 ohms; 900 Watts @ 4 ohms

  2. STM 600 - 375 Watts @ 8 ohms; 600 Watts @ 4 ohms

• SMPS and Class D power amplifier design

• Class A Six Stage Tube Preamp (3 x 12AX7A Tubes)

• Modified Passive Baxandall EQ for the Lows and Highs

• Active Tube Driven Mid EQ

• Selectable 3-Position Mid Frequencies: 220, 600, 2.5K HZ

• Input Mute

• Hi Gain switch

• Master Volume

• 3DPM™ Power Management

• Patent Pending P.H.A.T topology

• Full Direct Output Interface

• Effects Loop

• Headphone Input

• Aux. Input

• Dual Speakon Outputs

• Variable Speed Fan Cooling

  1. Patent Pending P.H.A.T. topology

  2. Weight:900  6.5lb (600 6lb)

  3. Size: 3 1/4" x 10" x 11 7/8"

Customer feedback;

Submitted on the 21st October 2013 by Paul who purchased a Genz Benz Streamliner 900 amplifier

Hi Mark,


Many thanks again for recommending the STM900 to me. I had two quite different gigs over the weekend which gave me an opportunity to test it with my Berg HT/EX 112’s.


The first was a bar gig with around 300 people with an in-house sound engineer. I played a Nordy vP5 (wearing flats) which the STM900 seems made for. It was easy to get a great sound on stage and FOH, which was detailed, and warm with plenty of punch. A very enjoyable experience!


The second was a charity fundraising ball with around 400 guests in a large hotel function suite. I found that I barely needed to run through the PA as the STM900 had plenty in the tank to take it all in its stride without ever being boomy or flabby – absolutely wonderful. I again used my Nordy vP5. The guitarist and drummer were both raising their eyebrows at how something the size and weight of a laptop could sound so big!


I look forward to checking out the Berg CN212!


Best regards,



Submitted on the 20th October 2013 by Tony who purchased a Genz Benz Streamliner 900 amplifier  and Genz Benz STL Max 9.2 amplifier

Hi Mark,

Just a line to say thanks and how very impressed I am with both amps. (Indecision is an expensive ailment!!)

I have used/tried practically every top brand over the years and the sound, tonal palate and value for money of these GB amps is unsurpassable.

Coupled up with my Vanderkleys 112MNTs both GB amps are absolutely stunning. On balance and after a couple of hours twiddling (as you quite rightly said) I think the flexibility of the Shuttle Max is giving it the edge for my personal taste. The mix of the FET & Tube channels is just phenomenal. 

Thinking of adding a 210MNT to the arsenal, when I have off loaded a bit more gear.

Thanks again for your help and forbearance.

Best Regards

Graham Smith

Submitted on the 26th June 2013 by Tony who purchased a Genz Benz Streamliner 600 amplifier and  Bergantino CN2112 cabinet

Its been 3 weeks since i purchased the amp & cab, i was fortunate in that i had Mark & the shop to myself for a couple of hrs on that day. Once he knew what sort of player i was & the music i played he gave me great advice. I have used the kit 2-3 times a week since then and have been very pleased with it. I have even started using my 71' P Bass again because through this kit it sounds wicked! thanks again Mark

Tony from Cheltenham

Submitted on the 18th May by Tony who purchased a Genz Benz Streamliner 900 amplifier and Bergantino CN212 cabinet

Took my Bergantino CN212 that I picked up on Friday to rehearsal tonight. It was truly epic. Easily the best cab I've ever heard or played through. Thanks for sorting me out with the cab Mark and thanks for your invaluable assistance. Happy chappy in B90! :-)

Submitted on the 11th March 2013 by Paul who purchased a Genz Benz Streamliner 900 amplifier and  Bergantino HD112 cabinets

Hi Mark,


I thought I should give you an update on the STM900 / HD112 combination I bought from you a few weeks ago. I’ve used it at home (it’s become my practice rig!), live accompanying an acoustic guitar, and at rehearsal with acoustic / drums. It’s a great combination – and I can’t believe how much clarity it has even when run very quietly. The sound carries so much more ‘weight’ than I was expecting, but along with the weight is clarity so that every little string rattle is picked up, and low slides just sound incredible.

Just out of curiosity, I took the Streamliner into my rock band rehearsal and ran it into my old Trace Elliot 4x10 cabs. It performed really well, has more ‘punch’ than my valve amp, and my guitar player actually preferred it. I still prefer my big valve amp in that situation, but it’s brilliant to have the option. Paired with a Berg 6x10 I think the STM would sound incredible.

I also ran it live where the venue provided (and insisted I used) an old Laney 2x10, and that highlighted just how much difference a new, modern cabinet makes.



Thank you for spending the time with me. I left with a fantastic, upgradeable system that’s small and light enough to be stolen by a small Vietnamese child on a scooter.


I also learned a bunch of things about bass kit in general.




In the words of Arnie…”I’ll be back!”



Submitted on the 3rd February 2013 by Colin who purchased a Genz Benz Streamliner 600 amplifier and  2 x Genz Benz Focus LT112 cabinet

Good morning Mark,


Finally got to try out the Streamliner 600 with the 2 Focus 1x12s. Absolutely brilliant.

Thanks for your advice.



Submitted on the 4th November 2012 by Michael who purchased a Genz Benz 600 Streamliner amplifier and  Genz Benz Focus LT210 cabinet

I parted company with my 500 watt Ampeg setup and went with the 600 Genz Benz Streamliner and one 210 Focus cab to start with. Another Genz cab will follow shortly to max the full 600 watts.
I added a spare 15 inch cab I already had because I knew I needed volume to spare and played it last night at a gig with a drummer who was partially deaf and didn't hold back at all with power. I was able to hear every note, crisp and clear above the drummer and a loud guitarist without pushing it too hard. The 10 inch speakers are so much better than the 15s I have been playing previously, the clarity and snap to each note is so reassuring.
I had read all about this gear and it is all true.
If I had known it was so much fun I would have done it much sooner.
Thanks to Mark at Bass Direct for sound advice and patience. As always, very helpful.

Submitted on the 28th October 2012 by Tim who purchased a Genz Benz Streamliner 900 amplifier and  Bergantino HD112 cabinets

Hi Mark


Tried the Streamliner the other night at rehearsal and was nothing short of amazing, I was worried it wouldn’t cut the mustard against the tone from my Mesa Walkabout but it did with ease. The sound from the streamliner is different but in a really good way, its much more rounded and the balance across the strings is much better or flatter compared to the Mesa which in the mix sounds fantastic. I usually need a compressor to flatten the sound but with the streamliner I set everything flat plugged in and played all night, the only tweaking was from curiosity to see what else it could do but the sound I like for finger funk was perfect from the off.

Thanks for your guidance


Submitted on the 23rd October 2012 by Steve who purchased a Genz Benz Streamliner 900 amplifier and  1 x Vanderkley MNT112 and 1 x MNT210  cabinets

Firstly a big thank you Mark for his advise and absolute refreshing view to promoting modern & cutting edge bass gear.

I had my first full gig with my Genz Benz and Vanderkleys last weekend and the difference was amazing... the clarity, the tone, the responsiveness and the portability. My Alembic always sounded good through the old SWRs but now has a new lease of life with such an improved sound!

Coming to see Mark has opened my eyes and ears to how much things have changed from my goliath days.... a worthwhile and inspiring (if costly) visit.

Submitted on the 9th October 2012 by Jason who purchased a Genz Benz Streamliner 900 amplifier and  2 x Vanderkley MNT112  cabinets

Hi Mark


I’ve been meaning to write but not got around to it until now…..


Just to say I am delighted with the rig I bought from you in September (Genz Benz Streamliner 900 and 2 x Vanderkley 112MNT). I’ve also just added an Auralex GRAMMA.


The sound is simply stunning. Tons of headroom, unbelievable clarity, warm smooth sub, punchy and dynamic in the mids when required. I’m particularly impressed with the bottom end response especially as the physical size and weight of the cabs is so small. I play a 4 string and use an octaver to get down low for Stevie Wonder stuff in Eb…..the sound is huge and the rig handles it without flinching!


You were right about this combination. The Streamliner is in a class of its own……the valves provide such warmth and tone. And the Vanderkleys are all about hifi. Perfect!


I might look for a new 5 string fretted bass at some point and will definitely come over again when I get to that stage. And I recommend your shop to all my friends for great gear and knowledge.





Submitted on the 30th September 2012 by Darren who purchased a Genz Benz Streamliner 600 amplifier and Genz Benz Uber 212 cabinet

Hi Mark.

Thanks for the help and advice you gave both before and during checking out the GB amp/cabs.

Having shopped in many, many music shops over the years it was a pleasure to meet someone who was knowledgeable, welcoming and amazingly helpful.

The Streamliner is an awesome piece of technology ( so much "ooommph" in so compact a package ) and the Uber bass 212 sounds simply immense. The perfect combination for my playing needs.

Now to start saving up for a Mike Lull T-bird to go with my Gibson LOL.



Submitted on the 28th September 2012 by Phil who purchased a Genz Benz Streamliner 900 amplifier and  Bergantino HD210 cabinets and a Dingwall 5 string bass

Hey Mark,

It's been a while since I bought this great rig from you, but I thought I'd leave the review until I'd gigged it a few times.

All I can say is this combination of Dingwall, Genz Benz and Bergantino (the Holy Trinity), produces the best sound I've ever got from any rig, at any price! There's so much headroom - more than I'll ever need - and so clear and warm without being muddy or harsh. Also, my fingers aren't blistered by the end of the gig!

I get great comments from band members and audience alike, saying they can actually hear what I'm playing.
I've since bought from you a Berg EX112 to go with the 210 - brilliant addition.

Thanks again for the advice Mark,


Submitted on the 20th September 2012 by Frederic who purchased  Vanderkley MNT112 and 210MNT  cabinets and uses a Genz Benz Streamliner 900 amplifier

A quick feedback about my purchase.

Those Vanderkley cabs are amazing. Thank you for the advice and patience when I was trying the set up.

I just practiced with my band and was smiling all night long. I could hear everything I was playing for the first time, with highs and lows totally balanced.

Also, I brought the cabs to the practice room without breaking a sweat :-)

This is going to keep me (and my drummer) happy for a long time!

Submitted on the 8th September 2012 by Jason who purchased a Genz Benz Streamliner amplifier and  2 x Vanderkley EXT112  cabinets


Used my new ext 12 cabs for the first time, blew my sox off

Many thanks for your advice

Kind regards


Submitted on the 23rd July 2012 by JDavid who purchased a Genz Benz Streamliner 900 and 2 x Begnatino HD112 cabinets

Hello Mark,
having had chance to put the 'Mini Rig' through it's paces, I couldn't be more pleased. After many years of lugging various 'Anvil' heavy high power amps & 'Monolith' speaker cabinets, it was a joy to stroll into the venue with my 'Man-Bag' Amp & Bass, followed by My Wife with a 'Berg' in each hand - Genius!
The Sound with the Jazz is classic Old School - mid range 'Honk' & chest compressing low end.
A Wonderous place you have there, a veritable Tardis of all things Bass, infact...A Great Day Out For All The Family.
Once again, thanks for the advice, and I'll be in-touch when I need that Corporate Gig Bling Bass!
Best Wishes,
David (Llandudno)

Submitted on the 21st June 2012 by Jeff who purchased a Genz Benz Streamliner 900 and 2 x Vanderkley MNT210 cabinet

Hi Mark

Reference the STM900 amp and MNT112 Vanderkley Cabs purchased earlier this week. Had our fist chance to use the gear last night. As a sixties traditionalist you may of gathered I was a unsure of changing to small, compact lightweight bass gear. What can I say, the sound, tone and power provided with those little gems is amazing, I have never heard such definition and tone from such small insignificant little boxes, for the first time in 45 years I could hear every note I played (not necessary a good thing).

Thanks for the guidance, let me know when the small bags are available for the Amp.

Best Regards


Jeff England

The Strangers   

Submitted on the 27th September 2011 by Michael who purchased a Genz Benz Streamliner 900 and Vanderkley MNT210 cabinet

Hi Mark,

Thanks for the advice on on the Genz-Benz/Vanderkley combination - I'm loving it!

Submitted on the 13th June 2011 by Denis who purchased an NS NXT 4 BASS, a Vanderkley EXT112 cabinet and an EA Micro amplifier

Thanks for your patience and advice Mark. The Steinberger has opened my eyes to the fact that anything is possible.

My mates thought that I was taking the mick when I turned up with the EA micro and Vanderkley 112 until I plugged in and started playing. After many years I can now actually hear what I am playing with total clarity. Once again thanks a million. I will certainly recommend you to anyone whp wants to sort out some gear.

Denis Wane

Submitted on the 24th April 2012 by Bruce who purchased a set of Dingwall ABi 5 bass and a  Genz Benz STM900 amplifier

Hi Mark

What can I say that hasn’t already about Dingwall? What an awesome bass, I tried several combustions and an ABZ, before finally settling on an AB1 and right now I’m loving it. Sorry its taken a while to get back to you, been trying to get my combination back together again. Three excellent components making up my rig, a Bergantino AE210, a Genz Benz Streamliner, and a Dingwall AB1. Together an awesome sound.

Thank you so much for your help.


Submitted on the 25th June 2011 by SAM who purchased a GENZ BENZ STREAMLINER 600

I was initially looking at the Markbass tube amp, Mark suggested I try the Genz Benz as an alternative. Having tried the MB tube I was unimpressed, tried the F1 and liked it. I also tried the Genz Benz Streamliner, for me it was so much better, giving me a lovely warm sound straight out the box.

Thanks Mark


Submitted on the 27th September 2011 by Michael who purchased a Genz Benz Streamliner 900 and Vanderkley MNT210 cabinet

Hi Mark,

Thanks for the advice on on the Genz-Benz/Vanderkley combination - I'm loving it!

Submitted on the 23rd October 2011 by Dave who purchased a Genz Benz Neox 210T cabinet and Genz Benz Streamliner 600 amplifier

Hi Mark,

Just thought i would share my thoughts on the GB head & cab i bought last week...

Drove straight from your shop to a gig, unpacked the head from it's box, plugged it in, set everything to 12 0-clock, sound-checked for volume, played for 3 hours straight and sounded like god! How many amps can do that?!! I am absolutely blown away by how good this gear is, not only did i cut through the mix perfectly but i did so without any nasty tops and with bags of beautiful, defined low end. I could hear every note that i played and most amazingly of all, i did this at a comparatively low volume when considered against my previous gear.

Thank you for having the passion to bring us bass players into the 21st century!

Craig Robinson

Submitted on the 18th November 2011 by John who purchased a Genz Benz Streamliner 900 amplifier and Genz Benz Uber 15T and 128T cabinets



Wow !!!!


An awesome almost old school sound and a formidable volume available with plenty of headroom. My Jack Bruce and Andy Fraser tone was still there with the tube preamp overdriving nicely.


Only downside was my guitarist saying he felt like a megalomaniac  with his Marshall stack, but I’m sure he’ll get used to it.


Suggested I bought an extra 115 to make it bigger and not commect it, expensive riser if you ask me………!


Thanks again Mark and if I can sell the spare Gibson SG Bass I may just take the Thinderbird !!!

After many years lugging my beloved Marshall stack and then the heavyweight VBA rig Mark convinced me to try a number of "lighter" alternatives.

The sound in our heritage rock band is old school and the Streamliner and my old Gibson EB3 nails the tube overdrive so loved by Jack Bruce and Andy Fraser.

Downside is my guitarist thinks he now looks like a megalomaniac and my gear looks too small.........small price to pay.......check us out on YouTube.

Mark knows his gear and it is a pleasure to spend time in the shop knowing that you are getting good advice and keen pricing do I need the Uber 4x12 as well?


GENZ BENZ warrants all products to be free from defects in materials and workmanship, for a period of 2 years (tubes come with a 90 day warranty) from the date of purchase, when purchased from an authorised GENZ BENZ dealer. This warranty does not cover normal wear and tear incurred from the normal designed use of the product and specifically limits the warranty for tubes to 6 months. This warranty is only effective if a copy of the original sales receipt is presented at the time of warranty service.

Genz Benz Warranty

GENZ BENZ will repair or replace, at its option, any defective materials provided the product:

•Has not been misused, abused, tampered, altered or damaged either by accident or during shipment.

•Has not been subjected to excessive or insufficient power, i.e. burned or discoloured voice coils.

•Has been returned to GENZ BENZ or its authorised service centre, freight pre-paid, together with a copy of the original sales receipt, from an authorised GENZ BENZ dealer.

•Has been registered with GENZ BENZ within 10 days of the purchase date.

•Has its original serial number intact and it has not been defaced, changed or removed.

Any products which may be used for rentals, while in the dealer’s inventory, shall be covered from the date of the original invoice to the dealer. If rented products are subsequently sold from dealers stock, this warranty shall be in effect only for the remainder of the warranty period not yet used. GENZ BENZ makes no other warranties, written or implied, with respect to its products merchantability or fitness for any specific purpose, other than covered in the duration of the length of this warranty. This warranty gives you specific legal rights, which may vary from state-to-state.


Unit 12, Rigby Close

Heathcote Ind Est

Warwick, CV34 6TH

tel: 01926 886433

Shop opening hours

Mon - Fri 9.30 - 5.00

Saturday 10.00 - 3.00

This gig bag fits the STL9. It features a carry handle, shoulder strap and front storage pocket.

Optional footswitch for STL9.0 amplifiers and combos. This controls the mute and three pre-sets. Each switch has a bright LED indicator light.

This rack kits fits the STL9.

This bag is the perfect fit for the Shuttle 9. It is fully lined, has a big storage pocket and has an internal strap for securing the amp.  £50