Matrix Audio MA-1: Class-AB power amplifier with headroom for dynamic music

The Matrix Audio MA-1 is a powerful two-channel Class-AB power amplifier for stereo systems that require power reserves even during large dynamic swings. 

Key features at a glance

• Headroom for demanding musical passages: Powerful output stages with a separate power supply for both channels.
• Expand the system: Different operating modes open up additional possibilities with a second device.
• Compatible with your existing preamplifier: XLR and RCA connections, as well as selectable gain, make integration easier.
• Convenience in everyday use: Trigger connections enable linked power control.

Power reserves for dynamic swings

When music transitions from quiet passages to powerful orchestral sections or punchy bass pulses, power reserves are required. The MA-1 delivers 250 watts per channel into eight ohms in stereo mode, measured with a music signal.

This makes it particularly interesting for systems whose speakers require more amplifier power at higher listening levels. Separate transformers for both channels and parallel-connected filter capacitors provide power to the powerful output stages.

Targeted system expansion at a later date

In stereo mode, one MA-1 powers two speakers, one on the left channel and one on the right. A new speaker or changing requirements do not necessarily mean a complete amplifier replacement. In addition to stereo mode, the MA-1 can be used in mono or bridged mode with a second device.

In bridged mode, each device powers one speaker and provides higher output power; two MA-1s are therefore required for a stereo pair. Mono and bridged modes differ in their wiring; which operating mode is suitable also depends on the speakers. In bridged mode, a minimum impedance of four ohms must be observed.

Combine with your existing preamplifier

Whether the preamplifier has balanced XLR or RCA outputs: both connection types can be used. The selectable gain helps to match the drive level to the output level of the preamplifier and the sensitivity of the speakers.

For fewer individual steps when listening to music, compatible devices can be linked to switch on and off together via the trigger connections. Within the M-Series, the MP-1 preamplifier and MS-1 music streamer are compatible. Volume control is carried out via the preamplifier or a source with adjustable output.

Cooling and placement

The cooling adapts to the operation: sensors monitor the heat sinks, and if necessary, the fan starts and automatically regulates its speed. A separate air duct keeps the electronic components out of the direct airflow.

For placement, a load-bearing surface and clear air paths are important. The CNC-milled aluminum bracket forms a stable base and separates the components into chambers. More than 5 cm of free space around the device supports ventilation.

Manufacturing

The Matrix Audio MA-1 is manufactured in China.

Suitability and important notes

Who is this power amplifier suitable for?

• Music lovers with a separate preamplifier who are looking for power reserves for their high-quality passive speakers.
• Also for stereo systems that are intended to be expanded with a second MA-1 at a later date.

Important notes

• The idle power consumption is 250–350 watts; heat generation and energy requirements must be considered during planning.
• For mono and bridged operation, observe the respective connection diagram and the permissible speaker impedance.

Conclusion

The MA-1 is suitable for listeners who enjoy dynamic music with corresponding power reserves and wish to continue using their existing preamplifier. The option to add a second power amplifier later leaves room for the further development of the system.

• matrix-audio-ma-1-bedienungsanleitung-en.pdf

Manufacturer
Matrix Electronic Technology Co., Ltd.
Room 206, Block B, #58 Mingguang Road
Xi’an, Shaanxi, 710016, China
Email: support@matrix-digi.com

German Distributor
DREI H Vertriebs GmbH
Kedenburgstraße 44 / Haus D
22041 Hamburg, Germany
Email: info@3-h.de
Phone: +49 40 375 075 15