Diamond 300B tube amp for stringed instruments

The Diamond is a resonating tube amplifier for acoustic and electric stringed instruments.
Its unique design allows natural musicians to experience their own gift of harmony
in ways that re-define inspiration.





Innovative and unique tube amp design

Adjustable internal Resonance

Ultimate purity in signal flow

Unique custom made Transformers
by Mercury Magnetics

Highest quality components

Handwired point to point wiring

Class A push/pull 30Watts 300B mesh plate output tubes 6J7G or 6K7G mesh plate preamp tubes 83 mercury vapor rectifier tube Adjustable resonance No-loss frequency range selector Point to point wiring 100,120,220,240VAC 50/60Hz Handmade in USA 3 year warranty

The Diamond emanates pure organic earth tones in crystalline transparency.
The signal flows freely without distortion or limitations in frequency range
from the original source directly thorough the speaker to the listener's ears.
No capacitors or resistors are in the way, as with conventional tube amplifier designs.





The Diamond's unique design originates from the simple approach of the pioneer days of tube technology.
The direct interaction of tubes and components has a resonating effect on the signal.
Harmonics can be tightened or released to create an acoustic instrument-like natural resonance.





The input absorbs all the unique character of the introduced signal.
Unlike conventional tube amp designs, with typical compression and signal loss,
the Diamond embraces every nuance blossoming to full musical potential.

Together with the ideally balanced JBL D130 mahogany speaker cabinet,
the Diamond becomes the ultimate clean tube amplifier for discerning musicians
perfectly matching refined tone and accomplished technique.





fine mesh powdercoated steel grill



"Chris, this combination of tubes, transformers and speaker is in the top 1% of the best tube gear ever made.
I love the 30s/40s design and cabinet work."

Sergio - Mercury Magnetics






Diamond Stereo Set - matched tubes and speakers, both cabinets made from one piece of striped mahogany
with grain running from left to right cabinet continuously, same with front panel veneers of both cabinets and chassis