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At the BassBoy pre-launch club.

The world premiere of the TWS BassBoy will take place at the GUITAR SUMMIT in Mannheim from September 22nd to 24th. For everyone who can hardly wait, we offer the exclusive opportunity to order from us before the official launch.


Of course, after the Guitar Summit you will be one of the first lucky BassBoy owners to receive the amp from us.


Simply fill out the form below and send us a non-binding, individual offer with attractive "Early Bird" conditions.


All pre-launch offers are only valid until the end of the GUITAR SUMMIT on the evening of Sept. 24, 2023!

Ich bin ein "BassBoy"!

Gehöre zu den ersten, stolzen Besitzern.

Ich habe Interesse an
Tolex & Bespannstoff

Danke, dass Du ein echter "BassBoy" bist. Du erhaeltst von uns in kuerze Dein persoenliches Angebot!

TWS Bass Boy

All-Tube for modern Bass-Players. Finally.


"Why isn't there an all-tube bass amp with practical performance for studios and small venues?"

That's one of the most common questions we've been asked since the Tube WorkShop started.


We can't answer that question, but we can say: it's here now. The Tube WorkShop BassBoy!


Even if our BassBoy is a completely new development, it is inspired by the legendary Ampeg B-15. After all, this studio icon shaped the bass sound of an entire era. With a power amp switch between 30W Cathode Bias (like the 60s models) or the 50W in Class A/B mode of the 70s models of the B-15, the BassBoy does justice to both eras.


The legendary Baxandall tone control, specially developed for bass applications, has been completely revised and, with the new "Character" control, offers complex access to the important mid-range spectrum. This allows the BassBoy to switch effortlessly between traditional (rather aggressive) bass sounds and modern, tidy sounds.



handmade in Germany.

Every BassBoy is handcrafted in Leingarten (D) and wired point-to-point by hand with the shortest signal paths. All connections are soldered (no connectors) to permanently prevent loose contacts and contact resistance.


The massive (2mm thick) aluminum chassis houses only hand-picked premium components as well as the highest quality transformers and an "over-designed" power supply for maximum durability. Only the best is good enough for us.



The mechanical installation of all components is completely decoupled from the electrical connections. Jacks, pots and tube bases do not exert any forces on the electrical connections that could lead to broken solder joints over time.


An extremely robust housing made of solid 18mm pine multiplex gives the BassBoy a high level of roadworthiness and at the same time is very easy to transport thanks to the generous carrying handle. Of course, the case is handmade in Germany.

bassboy_sound control.png

Tone Control

3 controls. From "modern" to "vintage".

Normally, bass players like to be "left alone" with a flood of controls in order to somehow tinker together their "desired sound". At TWS, we wanted it to be simpler and more practical... with fewer controls!


Based on the classic Baxandall tone control, which works very specifically on the bass and treble range, we invented the "Character" control, which works on the important mid-range in a multi-layered manner.


With the character controller you can continuously fade back and forth between a more "modern" and a "vintage-oriented" sound. "Modern" brings a very contoured and tidy bass sound, which is also ideal for slapping. "Vintage" results in a dense and assertive midrange, as we know it from countless recordings.


The "Character" control does much more than just boost or cut a specific center frequency. Rather, both the starting frequency, the bandwidth and the increase/decrease are continuously changed over the entire control range.


We can proudly say that this tone control is probably unique!

Preamp & Ultra Bright

full controll over distorted sounds.

The TWS BassBoy was specially developed to also deliver the coveted distorted tube bass sounds.


This is achieved through a finely tuned combination of the preamp control (= gain) and the "Ultra Bright" function, which can be activated by "dragging". 


In addition to the fact that the "Ultra-Bright" function can also be used to bring very dull-sounding basses back to life, this function is the "weapon of choice" when playing with a pick and with the BassBoy in the multi-layered world of the distorted tube bass sounds. Ultra-bright, character in the direction of "vintage", reduce bass and treble a little... and Motörhead Rules.


Have fun with it!



transformer balanced. What else?

Every good bass amp needs a balanced XLR DI out.


Even if miking the bass box is the "more meaningful" variant, the XLR DI-Out has established itself as a fixed "connection standard" for bass amps.


Of course, it is also available with the TWS BassBoy. And of course we have installed the highest quality variant for you. This is transformer balanced with a first-class transformer and of course has a GND lift switch to prevent ground loops.


Master & Power

Contemporary, with options from the 60's and 70's.

Gone are the days when you had to fill the whole hall with 300W tube cars and huge 8x10 speakers.


Today, we are happy to leave applications that require "pure power" to the well-assorted field of Class D amplifiers. 


In our opinion, 50 "tube watts" represent the "sweet spot" in order to have sufficient volume reserves in most applications and to be able to fully enjoy the coveted dynamic tube sound.


In order to be able to set this optimally for you personally, the TWS BassBoy has a PPIMV master volume that controls the volume at the latest possible point (i.e. directly before the power amp) and only minimally influences the overall sound of the amp.


But that's not enough for us.

With the 50W/30 switch on the back of the BassBoy, the behavior of the power amp can be adjusted between the early B-15's with "Cathode Bias" (approx. 30W) and the later B-15's (with approx. 50W Class A/B and toggle "Fixed Bias").


The volume differences are rather marginal. With a "fully cranked" TWS BassBoy, however, you will appreciate the differences, where the 30W Cathode Biased variant reaches good-natured saturation much earlier than the more stable Class A/B variant from the 70s.


Technical data

and specifics.

  • Handbuilt in Germany

  • Shortest signal paths. Best components. No connectors.

  • 50W Class A/B / 30W Cathode Bias, switchable

  • 2x 6L6 power tubes

  • 1x 6SL7 preamp tube

  • 1x 6SL7 Paraphase Phase Inverter

  • GZ34 rectifier tube

  • Post Phase Inverter Master Volume (PPIMV)

  • Preamp (gain) control with "Ultra-Bright" function

  • 3-band tone control with bass, treble and character controls

  • 4/8/16 ohm speaker impedance selector switch

  • Transformer-balanced DI-Out (XLR) with GND-Lift switch

  • Dimensions: WxHxD = 530 x 260 x 260 mm

  • Weight: 14 kg


TWS BassBoy top: RRP €3,299


TWS Bass Cabs

Even "small" speakers sound "big"...

Matching the TWS-BassBoy, we decided on a compact but fully-fledged bass box with a 1x12 full-range configuration.


An additional tweeter was deliberately omitted.


The decisive factor was the construction made of 15mm birch multiplex in a closed housing with a well-balanced bass reflex port on the front. This achieves an even sound across all frequency ranges. The TWS 1x12 bass box is equally balanced and very powerful with the smallest possible dimensions.

  • Hand built in Germany

  • Standard configuration: 1x12" Eminence Kappa-12A speaker

  • Load capacity: 450W

  • Impedance: 8 ohms

  • Housing and baffle made of 15 mm birch multiplex

  • Closed housing with bass reflex opening on the front

  • Generous carrying handle

  • Dimensions (W x H x D): 595 x 400 x 300 mm

  • Weight: 15,5 kg

  • Cover: Black Tolex

  • Front covering: Black/Silver

  • Price: RRP €1,049



Power or Lightweight?

Jensen_Bass Smooth_12.png

Our standard: Eminence Kappa-12A

A legend among 12'' bass seakers. Heavy built, high efficiency. Extremely "direct" and very balanced. This speaker literally "jumps" at you and brings you "forward" in every situation. With the best you can get...

Lightweight alternative: Jensen Bass Smooth 12

- Free of charge -

The Jensen Bass Smooth offers a very clear and differentiated sound with a weight of only 2.5 kg.

We recommend this speaker for all applications where low weight is more important than maximum sound pressure and power.

Tailored TWS Covers

keep the fun going...

TWS Protective Cases Top & Box

Of course, the best thing for your darling would be a flight case. But that's where things get big and difficult. And when you're not on a world tour, a good protective case is the perfect and affordable everyday companion.

  • Handmade in Germany

  • Custom made to fit the TWS BssBoy

  • Tailored to fit the TWS 1x12 bass box

  • Perfectly sewn imitation leather protective cover in leather look with sewn-on TWS logo

  • The protective cover is padded and splash-proof. It protects against knocks during transport and also against fading (UV protection) and dust.

  • Thanks to the neatly incorporated handle recesses, the amp and box can still be transported without any problems.

Price BassBoy top part protective cover: ??,-€

Price TWS 1x12 bass box protective cover: ??,-€

Pictures, pictures, pictures

Say more than 1000 words.

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