Bryce Monos

***Please note that these come as a pair. 

The story of the Bryce was an extension of our work with the Nautilus integrated amp. The Nautilus integrated how special single ended amps could sound. Where the Zions represent ultra bandwidth push pull mono blocks the Bryce monos our are Ultra wide bandwidth single ended amplifiers with an output that opens them to most speakers with moderate efficiency. 

The Bryce’s mono layout allowed room for innovative thinking with the inclusion of a fixed bias structure and moderate feedback. The Bryce exacts the maximum output from a single power tube through high bias and gentle feedback. Wired as true Tetrodes feedback was used to extend the frequency response and maintain operation closely mimic triode curves.

The Bryce utilizes our largest power supply to date. New transformers for created for the power and the choke to maximize output and newer larger power tubes. Transformers are one of the most special aspects of the amps. The Bryce performance is made possible with custom wound ultra-high quality output transformers from Transcendar, which provide excellent frequency extension and a flat response.

Cinemag transformers are used as input transformers for XLR to RCA conversion.

The input of Byrce unitizes input transformers for reduced noise floor, greater clarity, and sub-bass response.

For this reference amplifier, we paired the finest coupling caps, Jupiter copper foil in wax caps. The increases in micro-detail retrieval were remarkable.

The Bryce’s hand build nature and part selection necessitated a robust hand fabricated chassis. We partnered with our existing CNC metal fab house to build a 12 gauge steel chassis with bracing that could support the 30lbs of transformers without a hint of strain. In total, the Bryce is 40bs before packing. We additionally choose to cover all the transformers and business end of the amp with a gorgeous contrasting cover.

The Bryce is a classic and decidedly prosaic design, as it employs turrets and point-to-point wiring & there is no silicone, ICs, or regulators. We consider this a standard-bearer of purest audio with an American sensibility. The Byrce is built in a way few modern amplifiers are. This is not due to intrinsic inferiority, but rather it is impossible to rush and is incredibly expensive to produce. Some of the most familiar tube amps ever produced utilize this method, including; McIntosh, HK, Leek, Quad, & Western Electric. These amplifiers demand to be played and built to last a lifetime.


Bench report with 12AX7 inputs with 5ARA4 rectifier and KT-88's

Input sensitive: with 12AX7 input @ 650mV P-P

Noise: with 8ohm is 1.1mV RMS

Max Power: @ 8ohm is 12watts RMS

Ultra-wide bandwidth; 6hz to 40khz @ 1 watt

Power and Noise specs are dependent on tube selection.

Actual size is 13"wide, 10.5"deep, 7" tall


Bench report with 12AX7 inputs with 5ARA4 rectifier and KT-120’s

Input sensitive: with 12AX7 input @ 780mV P-P

Noise: with 8ohm is 1.4mV RMS

Max Power: @ 8ohm is 12watts RMS

Max Power: @ 8ohm is15watts RMS with KT-150 power tubes

Ultra-wide bandwidth; 6hz to 45khz @ 1 watt

Power and Noise specs are dependent on tube selection.

Actual size is 13"wide, 10.5"deep, 7" tall

***Please note that these come as a pair. 

The Bryce Monos are in production.


All ampsandsound amps are handmade in Southern California with custom hand-wound output transformers and U.S. sourced parts.

Our amps are hand-made by a small team with quality being our first priority.