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 circuit design

Adjustable 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

The Diamond emanates pure musical sound in crystalline transparency with an exceptional lively quality.
The signal flows freely without distortion, limitations and losses in power and 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.

Guitar players often dismiss high fidelity amplifiers, because they are simply not intended to interact with the dynamic range of guitar signals.
The Diamond's circuit, custom transformers and tubes are specifically designed and selected for stringed instruments,
allowing for a lively and musical response unlike a normal guitar amp that just uses 300B tubes.





The Diamond's unique design originates from the simple approach of the pioneer days of tube technology.
The direct interaction between tubes and transformers 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.




Mahogany cabinet and JBL D130 and removable casters



Together with a Field coil speaker or a JBL D130 mahogany speaker cabinet,
the Diamond becomes the ultimate clean to overdrive tube amplifier for discerning musicians,
perfectly matching refined tone and accomplished technique.





Field coil speaker and 'no vibration' fine mesh grill and removable casters



"Chris, this combination of tubes, transformers and speaker is in the top 1% of the best tube gear ever made.
I love the prewar style and cabinet work."

Sergio Hamernick - 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