【GZ ULTRA A-2 | 2ch Power Amplifier Focused on Sound Quality】

Rather than simply adding an amplifier to turn up the volume, the GZ ULTRA A-2 is for those who want to enjoy the expression and texture of music more carefully. In addition to a 2-channel configuration, it can also be used as a 1-channel Dual Mono Block power amplifier.

For the audio signal path, it uses a direct signal path that does not employ a potentiometer or an op-amp. While keeping the signal path simple, it combines high-grade components for areas that affect sound quality, such as MUNDORF® audio capacitors and rhodium-coated RCA connectors.

Beginning with the Swiss-made ELMA selector switch, the amplifier PCB—crafted with meticulous attention to every detail—is hand-made by highly skilled engineers. This model is designed to deliver sound that makes you want to listen to familiar songs again, closely, with renewed interest—such as the subtle nuances in vocals and the lingering reverb of instruments.

Its adjustment functions are limited to a 2-step BIAS selector and a 4-step input sensitivity selector. Rather than offering fine tuning through extensive functionality, the design prioritizes the sound quality of the amplifier itself and the signal path.

However, high-end amplifiers do not produce the same sound simply by being installed. The impression will vary depending on combinations with speakers and subwoofers, how the power is supplied, the installation method, and adjustments across the entire system. If you want to fully bring out the character of the GZ ULTRA A-2, it’s a good idea to consider a reasonable configuration together while confirming the vehicle’s system and your listening preferences.

Main Specifications

【Basic Information】
Product name: GZ ULTRA A-2
Type: 2ch power amplifier
Configuration: 2ch / 1ch Dual Mono Block

【Circuit / Design】
Signal path: Potentiometer & op-amp-less direct signal path
Amplifier PCB: Hand-made
Selector switch: Swiss-made ELMA
Audio capacitors: MUNDORF®
RCA connectors: Rhodium-coated

【Adjustment Functions】
BIAS selector: 2 steps
Input sensitivity selector: 4 steps

*The above has been organized based on specifications that could be confirmed. Since installation methods for the vehicle and system configurations vary depending on the vehicle model, existing system, and intended use, we will guide you while checking an actual vehicle.

Shop owner　Komizo (Komizo)