AGD SOLO Limited Edition
GaN-Power Monoblock Amplifier

Design Philosophy

The AGD SOLO GaN Monoblock Limited Edition amplifier is the most powerful amplifier of the AGD family.

Combining the world-wide recognized innovative AGD GaN technology with a new and always unique and elegant design, this amplifier promises to drive any demanding loudspeaker with outstanding results in terms of dynamics, details, and stage. 

The AGD SOLO is rated 550W max on 4ohm and it is characterized by an outstanding >70A peak output driving capability. 

GaN-Sound Power Monoblock

The AGD SOLO MONOBLOCK uses the same fundamental technology pioneered with the AGD Gran Vivace, AGD TEMPO, AGD AUDION, the first true Hi-End amplifiers based on Gallium Nitride power MOSFET.

With the AGD SOLO, we have extended the use of the latest generation power semiconductors, GaN MOSFET up to a new level of overall sonic performances.

Thanks to the new GaNSound module improved components, enhanced thermal management, and a new optimized layout, we achieved our target to operate this much larger power stage at 800kHz, for the utmost outstanding sonic and musical performances. 

The New AGD GaN-Sound Module

Also, with the AGD SOLO we have retained the key fundamental feature of upgradable GaNSound power  module.

This is a key feature AGD has maintained with all amplifier designs, from the Audion to the Gran Vivace, the Tempo and now the SOLO.

At AGD we firmly believe the customers have the rights to maintain the value of their investment, therefore we enable the possibility to upgrade the GaN output stage module at time when a new GaN MOSFET device delivers a performance and technological  improvement.

The GaN technology in power semiconductor is only 10 years old, versus 60years of silicon technology evolution.

New improved GaN MOSFETs will therefore deliver augmented sonic performances by means an upgraded module in a form of a new GaNTube or, like in the DUET and TEMPO and now the AGD SOLO, via a dedicated daughter board, easy to plug-in.

Main Board

The AGD SOLO new main board is a 4 layers PCB designed with the utmost attention to minimize the noise and limit the parasitics with an optimal control of the layout.

With extra large and thick copper traces (2oz), the new board presents a perfect ultra-low resistive path for the flow of high current and minimized stray inductance that allows unprecedented rise and fall times.

The AGD SOLO main board is designed to accommodate an additional capacitor bank (on top of the one housed on the power supply circuit) up to 30,000µF (100V), a key feature to support the most dynamic current demand of the most difficult loads.

Moreover, the AGD “GaNSound” Module is easily removable for future upgrades and has an additional copper heat-spreader to maintain the most stable and safe temperature during operation.

New Smart Linear Power Supply

The AGD SOLO features a linear power supply with two SMART bridges rectification stages to minimize the conduction losses and virtually eliminate the reverse recovery losses. 

The power supply section is characterized by an oversized 700VA ultra-low noise toroidal transformer, completely encapsulated in resin inside a dedicated enclosure, the construction is virtually noise and vibration free,

The total bulk capacitor bank of ~100,000µF makes available a surplus of dynamic power with unprecedented peak current capability for the most extended time.

Measurement Snapshots

Front Side view

The key features of the AGD SOLO Cabinet are the two solid wood side panels, with a surface finished to match 100% the Ocean way Sausalito MKii finishing (making the perfect match also for the aesthetical viewpoint)

The front, back and top panels of the AGD SOLO cabinet are 100% CNC-machined and along the wood trims, are intended to deliver the best solidity and compactness for audiophiles that are looking to get the superior sound with the most advanced technology. 

The AGD SOLO is available with a standard finishing Black or Silver Anodized

Wood trim colors and a mirror-polished front panel are available as optional.

Back Side view

The New AGD SOLO Cabinet

The AGD SOLO back panel configuration offers easy access to all connectors and the power entry module with 10A fuse protection.

The AGD SOLO has both the single ended (Gold plated) and Balanced inputs connectors. 

The inputs (completely independent) are selectable via toggle switch.

Two sets of super rugged WBT copper binding posts, and a Pro-audio plug-in socket for a secure wiring to the loudspeakers are positioned for easy interconnect of large speakers’ cables.

The Mains Input Voltage change is manual, with 220-110V switch selector option.

The connections for remote trigger input (12V) complete the back panel configuration.


Each AGD SOLO is delivered in a ruggedized flight case with wheels for easy transportation. The AGD AC power cable with silver plated multi-string conductors, is standard (US Plug).


Nominal Output, 20Hz÷20KHz, 4Ω 500W
THD+N 10W/1KHz<0.005%
Maximum Output Power at 0.1% THD+N, 1KHz, 8Ω300W
Audio Bandwidth ±0.5dB20Hz-20KHz
Bandwidth ±3dB5Hz-80KHz
Input Impedance40kOhm (600Ohm upon request)
GaN Power Module PWM Frequency~800kHz
Dimensions14.5×11.25×6.5 inches 370x285x165mm)
Weight45lbs (20kg)
Input Voltage110-240V (User selectable)


MRSP  – $23,500             Delivery September 2023