Pure Resonance Audio RMA350BT 350W Bluetooth Rack Mixer Amp

350W Rack Mixer Amplifier for Music, Paging and Announcements

The Pure Resonance Audio RMA350BT is a 5-channel, 350W Class D rack-mount mixer amplifier designed for background music, paging, announcements, and distributed-audio systems. It combines amplification, microphone mixing, Bluetooth playback, USB and TF media support, FM radio, tone controls, and emergency-priority functionality in a compact 1U chassis.

The RMA350BT supports both 70V distributed speaker systems and compatible 4–16 ohm low-impedance speakers, making it useful for restaurants, offices, schools, retail spaces, fitness centers, hospitality environments, houses of worship, and other multi-speaker audio installations.

Key Specifications

• Model: RMA350BT
• Amplifier type: 5-channel Class D rack mixer amplifier
• Rated power output: 350W
• Speaker outputs: 4–16 ohm / 70V
• Microphone inputs: 4
• AUX inputs: 2
• Emergency input: 1 EMC priority input
• Media playback: Bluetooth, USB thumb drive, TF card, and FM tuner
• Frequency response: 80Hz–16kHz ±3dB
• THD: 0.05%
• Tone controls: Low ±10dB at 100Hz; High ±10dB at 10kHz
• Cooling: Variable-speed forced-air fan
• Protection: Overheat and short-circuit protection
• Rack height: 1U
• Power consumption: 500W

Who Should Choose the RMA350BT?

Choose the RMA350BT when you need one rack-mounted unit to handle music playback, microphones, paging, and speaker amplification without adding a separate mixer and power amplifier.

Its 350W output makes it suitable for larger 70V speaker systems than lower-powered mixer amplifiers, while the 4–16 ohm output also supports compatible low-impedance speaker setups.

350W Class D Amplification

The RMA350BT provides 350W of rated Class D amplifier power in a compact 1U rack chassis.

Its Class D design helps keep the unit relatively lightweight and compact while delivering enough output for many medium-to-large background music and paging systems.

70V and 4–16 Ohm Speaker Outputs

The amplifier supports 70V distributed-audio systems as well as compatible 4–16 ohm low-impedance speaker loads.

For 70V systems, add the transformer tap wattages of all connected speakers and keep the total connected load below the amplifier's available output with appropriate operating headroom.

Bluetooth, USB, TF Card and FM Playback

The built-in multimedia player supports Bluetooth audio from compatible phones, tablets, computers, and other source devices.

You can also play compatible audio from a USB thumb drive or TF card, or use the built-in FM tuner. Pure Resonance Audio does not recommend relying on FM as the primary source because reception can vary with location and interference.

Four Microphone Inputs and Two AUX Inputs

The RMA350BT provides four microphone inputs and two AUX inputs for microphones, media players, computers, AV equipment, and other compatible audio sources.

This allows music and paging sources to be combined through a single rack-mounted amplifier.

Emergency Priority Input

A dedicated EMC emergency input is designed to override normal program audio when activated.

This allows a compatible emergency announcement or voice-alarm source to take priority over background music and other audio sources.

Audio Pre-Output

The RMA350BT includes an AUDIO OUT pre-output rated at approximately 1V / 100 ohms for connection to compatible downstream audio equipment.

This can be useful when additional amplification or system expansion is required.

Front-Panel Tone Controls

Low-frequency and high-frequency tone controls provide approximately ±10dB of adjustment at 100Hz and 10kHz.

This allows basic tonal adjustment to better match the connected speakers and listening environment.

Forced-Air Cooling and Protection

A variable-speed forced-air cooling fan helps manage operating temperature during extended use.

Built-in overheat and short-circuit protection provide additional protection during abnormal operating conditions.

1U Rack-Mount Design

The RMA350BT occupies only one standard rack unit, making it practical for compact equipment racks and cabinets.

• Height: 1.73" (44 mm)
• Width: 19.05" (484 mm)
• Depth: 11.61" (295 mm)
• Weight: 11.50 lb (5.22 kg)

Power Requirements

• Input voltage: 110–120V AC, 60Hz
• Power consumption: 500W

What's Included?

• 1 Pure Resonance Audio RMA350BT mixer amplifier
• IR remote control
• Power cord

Complete Your Audio System

• Pure Resonance Audio
• In-Wall & In-Ceiling Speakers
• Speaker Wire

Need Help Matching the RMA350BT?

Send Bear Security Shop your speaker models, quantity, transformer tap settings, and intended music or paging sources. We can help confirm the total speaker load and whether the RMA350BT is appropriate for your system.

How much power does the Pure Resonance Audio RMA350BT provide?

The RMA350BT is rated for 350W of amplifier output.

Does the RMA350BT support 70V speaker systems?

Yes. It includes a 70V speaker output for distributed-audio systems.

Does the RMA350BT support 100V speaker systems?

No 100V speaker output is listed by Pure Resonance Audio. The amplifier supports 70V and compatible 4–16 ohm speaker loads.

Can I use low-impedance speakers with the RMA350BT?

Yes. Pure Resonance Audio specifies compatibility with 4–16 ohm speaker loads in addition to 70V systems.

Does the RMA350BT have Bluetooth?

Yes. The built-in multimedia player supports Bluetooth audio from compatible source devices.

Can it play music from USB or a memory card?

Yes. The multimedia player supports USB thumb drives and TF cards.

Does it include an FM tuner?

Yes. A built-in FM tuner is included, although Pure Resonance Audio does not recommend FM as the primary source because reception can vary by location and interference.

How many microphone inputs are available?

The RMA350BT includes four microphone inputs.

How many AUX inputs does it have?

It includes two AUX inputs for compatible line-level audio sources.

What does the emergency input do?

The EMC emergency input takes priority over normal program audio and is designed for connection to a compatible emergency voice or announcement source.

Does the RMA350BT include tone controls?

Yes. It provides low- and high-frequency tone adjustment of approximately ±10dB at 100Hz and 10kHz.

Does it have a line-level audio output?

Yes. The RMA350BT includes an AUDIO OUT pre-output for connection to compatible downstream audio equipment.

How many rack spaces does it use?

The RMA350BT occupies one standard rack unit and measures approximately 1.73" high.

What comes with the RMA350BT?

The package includes the RMA350BT mixer amplifier, IR remote control, and power cord.

Is the RMA350BT still a current Pure Resonance Audio model?

Pure Resonance Audio currently lists the RMA350BT as discontinued. Availability therefore depends on remaining inventory.