Matrix Audio MA-1 Power Amplifier at Vinyl Sound Buffalo, NY USA

The MA-1 is a flagship Class AB stereo power amplifier from Matrix Audio (Xi'an, China), available at Vinyl Sound in Buffalo, New York, USA. Matrix Audio's first dedicated power amplifier, the MA-1 delivers 250W RMS per channel into 8 ohms in Stereo mode, scaling to 900W into 4 ohms in bridged Mono mode, with ten ONSEMI high-power transistors per channel in a parallel push-pull output stage. Its dual-mono power supply is built around two independent 1250VA square copper wire toroidal transformers and a 190,000µF capacitor bank, delivering a measured damping factor of 350 at 8 ohms. Configurable for Stereo, bridged Mono, or dual Mono operation, the MA-1 has been reviewed by Positive Feedback alongside the Matrix Audio MP-1 preamplifier as part of the complete M Series flagship system.

Output Stage: Ten ONSEMI Transistors Per Channel in Push-Pull

The MA-1's output stage deploys ten ONSEMI high-power transistors per channel in a parallel push-pull configuration operated at high bias current. Applying ten devices in parallel dramatically lowers the effective output impedance, contributing to the measured damping factor of 350 at 8 ohms and 1kHz. High damping factor means the amplifier exerts precise control over speaker cone movement, translating directly into tighter bass definition and faster transient response. The high-bias operating point minimizes crossover distortion artifacts, preserving textural detail across all dynamic levels. Gain is selectable between +24dB and +30dB, allowing the MA-1 to be accurately matched to preamplifiers of different output levels without compromising the gain structure of the system.

Dual-Mono 1250VA Power Supply and 190,000µF Capacitor Bank

The MA-1's power supply is built around two independent toroidal transformers wound with square copper wire, each dedicated to one channel, providing a combined 1250VA of capacity. Square copper wire windings deliver lower resistance and higher current capacity than conventional round wire, improving transient response and low-frequency authority. The transformer outputs feed a capacitor bank totaling 190,000µF, composed of 14 parallel-connected 6,800µF capacitors per channel. Distributing the capacitance across multiple smaller capacitors reduces equivalent series resistance compared to a single large capacitor of equivalent value, enabling instantaneous response to large current demands at musical peaks without voltage sag. The main supply rail operates at plus or minus 80V, and total static power consumption at idle reaches 250 to 350W, reflecting the high-bias state of the output stage.

Three Operating Modes: Stereo, Dual Mono, and Bridged

The MA-1 operates in three distinct configurations. In Stereo mode it delivers 250W into 8 ohms and 450W into 4 ohms per channel, stable down to 2 ohms. In dual Mono mode, two MA-1 units each handle a single channel independently, providing a dedicated power supply, output stage, and chassis for each loudspeaker. In bridged Mono mode, two MA-1 units combine to deliver 500W into 8 ohms or 900W into 4 ohms from a single bridged output. Input sensitivity adjusts from 1.48Vrms in Stereo and Mono to 1.0Vrms in Bridged mode to maintain optimal gain structure across all three configurations.

H-Shaped Chassis and Intelligent Thermal Management

The MA-1 uses an H-shaped chassis machined from a 20mm thick CNC-aluminum central beam to which all components are mounted, creating isolated internal cavities that prevent electromagnetic coupling between circuit sections. The left and right channel circuits are arranged symmetrically on either side of the beam, contributing to the measured -125dB crosstalk figure. Thermal management is handled by two temperature sensors that trigger a 7.4-inch fan inside an isolated duct when a preset threshold is exceeded, keeping airflow away from electronic components and maintaining near-silent operation at normal listening levels. At 42.4kg and 430 x 518 x 201mm, the MA-1 shares the same rack width as the MP-1 and MS-1 for a coherent M Series installation.

Key Features

• 250W Per Channel into 8 Ohms (Stereo): Ten ONSEMI transistors per channel in parallel push-pull at high bias current deliver 250W into 8 ohms, 450W into 4 ohms, and stability down to 2-ohm loads in Stereo and Mono modes.
• 900W Bridged Mono into 4 Ohms: Two MA-1 units operate in bridged Mono mode to deliver up to 900W into 4 ohms, providing reference-level power for the most demanding loudspeakers.
• Three Configurable Operating Modes: Stereo, dual Mono, and bridged Mono modes offer three distinct amplifier configurations from a single chassis, adaptable to any system topology.
• Dual-Mono 1250VA Power Supply: Two independent square copper wire toroidal transformers, one per channel, provide a combined 1250VA with complete channel isolation at the power supply level.
• 190,000µF Capacitor Bank: 14 parallel-connected 6,800µF capacitors per channel form a low-ESR energy reservoir that responds instantaneously to dynamic current demands without compression.
• Damping Factor of 350 at 8 Ohms: The low output impedance from ten parallel output transistors gives the MA-1 precise control over speaker drivers, delivering tight bass and fast transients.
• Selectable Gain (+24dB / +30dB): Two gain settings allow accurate level matching with any preamplifier output, preserving optimal gain structure across the full system.
• Intelligent Silent Cooling: Two heatsink temperature sensors trigger a 7.4-inch fan in an isolated duct when a thermal threshold is reached, keeping fan noise effectively inaudible during normal listening.
• H-Shaped CNC Chassis: A 20mm thick central aluminum beam provides mechanically isolated internal cavities for each circuit module, with left and right channels arranged symmetrically for minimum inter-channel interference.
• Trigger In / Out: DC trigger ports enable system-wide power sequencing when integrated with the Matrix Audio MP-1 preamplifier and MS-1 or MS-1c streamers.

Technical Specifications

Connections at a Glance

• XLR Balanced Analog Input (per channel)
• RCA Single-Ended Analog Input (per channel)
• Speaker Binding Posts (per channel)
• Trigger In (DC 6-12V)
• Trigger Out (DC 12V / 50mA)
• IEC Power Input

Frequently Asked Questions

What is the Matrix Audio MA-1?

The Matrix Audio MA-1 is a flagship Class AB stereo power amplifier from Matrix Audio (Xi'an, China), built around ten ONSEMI transistors per channel in parallel push-pull, a dual-mono 1250VA power supply, and a 190,000µF capacitor bank. It delivers 250W per channel into 8 ohms in Stereo mode, scaling to 900W into 4 ohms in bridged Mono mode, with selectable +24dB and +30dB gain and a measured damping factor of 350 at 8 ohms. It forms the power amplification anchor of the Matrix Audio M Series alongside the MP-1 preamplifier and MS-1 or MS-1c streamers, and is available at Vinyl Sound in Buffalo, New York, USA.

How does the Matrix Audio MA-1 compare to the Pass Labs XA60.8 or Parasound JC 5?

The Matrix Audio MA-1 competes directly with high-power stereo amplifiers such as the Pass Labs XA60.8 and Parasound JC 5. The Pass Labs XA60.8 operates in pure Class A up to 60W before transitioning to Class AB, prioritizing tonal purity at lower output levels with a lower peak power ceiling. The Parasound JC 5 is a fully balanced Class AB design delivering 400W into 4 ohms. The MA-1 differentiates with its ten-transistor-per-channel parallel output stage, true dual-mono 1250VA power supply with independent transformers per channel, three configurable operating modes including bridged Mono at 900W into 4 ohms, and an integrated trigger and gain-switching system designed for seamless M Series operation.

Can two Matrix Audio MA-1 amplifiers be used in bridged Mono mode?

Yes. Two MA-1 units operating in bridged Mono mode each deliver a single channel at up to 500W into 8 ohms or 900W into 4 ohms. Each amplifier handles one loudspeaker with the full combined output of both internal channels, making it appropriate for power-hungry loudspeakers or large listening rooms where extreme output power and authority are required. The minimum speaker impedance in bridged Mono mode is 4 ohms.

What is dual Mono mode on the MA-1 and how does it differ from Stereo mode?

In dual Mono mode, two MA-1 amplifiers are used with one unit dedicated entirely to the left channel and the other to the right. Each amplifier operates as a single-channel device with its complete power supply, output stage, and chassis devoted to one loudspeaker. This eliminates shared power supply interaction between channels and reduces the noise floor per channel compared to standard Stereo mode. Dual Mono mode is well suited to loudspeakers that support bi-wiring or bi-amping, and to audiophiles seeking maximum channel separation and dynamic headroom in a reference system.

What loudspeakers are compatible with the Matrix Audio MA-1?

The MA-1 is compatible with loudspeakers presenting a load of 2 to 16 ohms in Stereo and Mono modes, covering the full range of modern passive loudspeaker designs including low-impedance floorstanders from brands such as Wilson Audio, Magico, Focal, and Bowers and Wilkins. In bridged Mono mode the minimum supported impedance rises to 4 ohms. The MA-1's damping factor of 350 and its high current reserve from the 190,000µF capacitor bank make it particularly effective at controlling woofer drivers in large bass-reflex and transmission-line loudspeaker systems.

How does the MA-1's intelligent cooling system work?

The MA-1 uses two temperature sensors that continuously monitor the main heatsink surface. Under normal listening conditions the amplifier operates passively with no fan activity. When the heatsink temperature exceeds a preset threshold, a 7.4-inch fan activates inside an isolated internal duct that directs airflow away from circuit boards and electronic components. This ducted design prevents dust accumulation on sensitive parts and keeps fan noise effectively inaudible during typical listening sessions. Fan speed adjusts dynamically in proportion to the measured thermal load, stepping back down and stopping as the heatsink cools.

What gain setting should I use when pairing the MA-1 with the Matrix Audio MP-1 preamplifier?

The appropriate gain setting depends on the sensitivity of the loudspeakers and the output level of the MP-1. The MP-1 delivers up to 36Vrms from its XLR balanced output with +12dB of gain, which is a very high output level. In most systems with moderately sensitive loudspeakers, the MA-1's +24dB gain setting will provide ample output while keeping the volume control in a precise and usable range. The +30dB setting is better suited to low-sensitivity loudspeakers or situations where the source level is inherently low. Vinyl Sound Buffalo can advise on the correct gain configuration for a specific system.

Where can I buy the Matrix Audio MA-1 in Buffalo, NY or the USA?

The Matrix Audio MA-1 is available at Vinyl Sound, located in Buffalo, New York, USA. Vinyl Sound is an authorized Matrix Audio dealer serving customers across Western New York and the United States, with expert guidance on operating mode configuration, loudspeaker matching, and full M Series system assembly including the MP-1 preamplifier and MS-1 or MS-1c streamers.