The absolute value in high-end sound reproduction: Un-matched bass, detail and efficiency; we'll throw in a huge soundstage for free!


Creating a new loudspeaker is always a bit of a quandary ... Is it needed? Is it better than its peers and predecessor[s] and in our case; will it come close to Berlin and L'instrument with their unique horn loading. The Briton TubeMaster is that good!  Its upside down layout helps create the large soundstage of its horn loaded lot improves timing and coherence. The internal resonator preserves acoustic energy; improving efficiency, and bass.


The wide-body layout further expands the sound-stage and bass. The drivers are anchored directly into a massive solid heirloom wood baffle which is set in a semi-suspension for improved damping without killing acoustic energy.


The super strong cabinet is clad of 3/4 inch 15 layer void-free ply from Finland; or in the case of TubeMaster Copenhagen the entire cabinet is machined of solid heirloom timbers. 


We've named it TubeMaster as it can fully deliver the detail, and inexplicable magic of vacuum tubes. We believe that Tubes are the future of high-end audio and tube systems pair so well with today's digital sources... or go completely analog either way Briton TubeMaster is a High-End best choice for vacuume tube amplification.

NEW TubeMaster     Copenhagen


Driver Complement:

12" wide-band bass driver with low mass VC, and Kevlar / paper diaphragm

6' wide-band driver with Kevlar / paper diaphragm 

Horn-Loaded Super tweeter with AlNiCo motor (adjustable gain) plays to 50 Khz!

12db attenuation knob on front for easy sound contour adjustments

Solid tone-wood front and rear baffles 

Cabinet hand lapped of Solid tone-wood Norse Lock © cabinets dual semi-active front and rear baffles. Solid poplar internal bracing. No ply, no MDF, built for life!


Internal resonator/damper with front by-pass port

Binding post/Terminals: 

4 way low-mass tellurium copper

+Driver frame earthing post

Crossover (first order 6db) asymmetric Internal wiring: 20 awg solid-core 6N copper in cotton dielectric, second run is 28 awg silver in cotton dielectric, silver solder

Sensitivity: 98.5db

Impedance: 8 Ohms



22 Hz - 50kHz

Recommended Power:

1.5 - 50 high-volt tube watts

50 - 250 transistor watts


46.5"H 18.4"W  13"D  


90 LBS 


Your Bespoke Order:

Choose your wood baffle:

(rubbed oil finish or sprayed satin-gloss finish)


Maple Center with Cherry sides (shown)

Maple center Claro walnut sides + $ 250

Claro walnut center maple sides + $ 350


One tone:

All Maple

All Cherry

All Claro walnut + $600

All Port Orford White Cedar + $2,000

Choose your cabinet colour:


(Gloss, satin or matte)

Near Black

Just off white

Kabuki Red

True Red

AT Gray

Custom colour: +250

Download Price List:


Optional contour  adjustment for wide-band driver and Super tweeter


Viking Acoustic TubeMaster's low-profile, wide-body cabinet is made from exceptionally strong15 layer Finnish Birch Ply (no MDF) features hardwood dowel construction (no metal screws) and is internally braced with a solid spruce-wood internal beam.


TubeMaster Copenhagen has a low profile form and can be placed near a rear wall.


Internal resonator / damper with front by-pass port


January, 2020

TubeMaster + Audio Note Ongaku

Paul from Santa Fe, NM


First off, let me just say that I don't do product reviews and have never done a product review good or bad on anything. I don't blog, and never look at facebook or twitter and this will be my first. I'm a private person and musician as is my wife. I've spend many hours and much money on obtaining the finest audio gear. I've purchased solid state gear and large metal speakers from California that cost as much as a good used automobile which in the end I sold off and then purchased tube gear which is hand made in Japan along with matching speakers and have been pleased with this system.


Music, I listen to classical strings and jazz. My wife is a concert Cellist and so this is part of our listening repertoire too.


I first heard David's speakers in Munich a few years back while looking for my next audio acquisition. David's room had Audio Tekne gear and Kabuki speakers which were really beautiful and the most expensive phono preamplifier on earth this was one of the top three rooms for me but In the end I did not purchase Kabuki or the big gray amplifiers and went a different direction.


More to the story. I live in Santa Fe, New Mexico so asked if I could come and hear their new speaker the "TubeMaster" even though I was totally happy with my current Audio Note setup. David suggested he deliver and set up TubeMaster in my home to demo on my gear so that we did.


Acoustic Resonator, One of the reason I did not buy Kabuki a few years back is that I was told not to by the good people selling Audio Note they said that a vibrating resonator in a speaker was just not a sound idea even though everyone I spoke to that heard Kabuki, Audio Tekne in Munich were amazed by the sound, the bass and dynamics.

The TubeMaster has this resonator too and is visible through the port at the lower front of the speaker and if you place your finger on this while playing music you indeed can feel it well as vented bass.


Sound: overwhelming, It's hard to explain but now the cello has another dimension the piano has that rich bottom end which is subtle and requisite full symphonic music is now complete and massive all-there. My AN speakers sounded really good to me but now sound a little contrived and a little small and I can hear the cabinet making its own not so pretty sound. The TubeMaster is the master sound reproducer for me. Eat your heart out Peter Snell.


TubeMaster is built by hand in our workshops and built just for you. The massive solid tone-wood baffle is available in many different wood combinations while the extra strong cabinets are finished in our signature Near black epoxy paint. But if you want a custom color we do that too!


 Innovated and hand-made in the USA

© 2020-2021 Viking Acoustics LLC. All Rights Reserved