Rolls MA2355 5-Input Stereo Mixer/Amplifier, 35W/Ch (1RU)

Rolls MA2355: Compact 35-Watt Stereo Mixer/Amplifier for Small Installs

The Rolls MA2355 is a 1RU five-input stereo mixer/amplifier that delivers 35 watts per channel into 8-ohm speakers for small commercial spaces. It exists to be the complete audio front end for a cafe, bar, or meeting room, mixing microphones and music sources and driving a stereo pair of speakers from one rack unit. Two XLR mic inputs and three stereo RCA sources feed the mix, with phantom power, bass and treble controls, and 1/4-inch insert points for processing. Its front panel doubles as a heat sink so it runs without a fan in a single rack space. For a small venue that wants clean stereo sound with a paging mic and a few music sources, the MA2355 packs the whole system into one box.

35 Watts Per Channel in Stereo

The MA2355 provides 35 watts per channel into 8-ohm speakers, sized for the stereo playback a small commercial room needs. Unlike a 70V system built for many speakers, this direct 8-ohm stereo output drives a pair of quality speakers with true left-right imaging. Thirty-five watts per side is enough to fill a cafe, bar, or conference room at comfortable background and foreground levels without overpowering the space. Running in stereo means music keeps its width and detail rather than being summed to mono for distribution. For a small venue that cares about how the music actually sounds in the room, the MA2355's clean stereo amplification is exactly the right approach.

Two Mics and Three Stereo Sources

The MA2355 mixes two balanced XLR microphone inputs with three stereo RCA source inputs, handling both voice and music in one amplifier. The mic channels present a 600-ohm balanced input for real microphones, while the source inputs at 22k ohms accept media players, tuners, and computer or phone feeds without loading them down. Blending all five into the stereo output means one unit covers a paging mic and several music sources at once. Each input has its own level so the mix stays set through a shift. For a bar or meeting room that plays music but occasionally needs a microphone, having dedicated mic and line channels on the amplifier itself keeps the whole setup in a single box.

Phantom Power and Tone Shaping

The MA2355 supplies +12 VDC phantom power for condenser microphones and offers bass and treble tone controls with plus or minus 12 dB at 100 Hz and 11 kHz. Phantom power runs condenser mics directly off the amplifier, so a sensitive podium or paging mic works without a separate power source. The tone controls let an installer shape the sound to the room, adding low-end warmth or trimming harsh highs to suit the space and the speakers. That control keeps both speech and music sounding right rather than fighting the room's acoustics. For a small install tuned by ear, phantom power plus flexible tone shaping are what let the MA2355 sound polished in any space.

Insert Points and Fan-Free Cooling

The MA2355 includes 1/4-inch insert points for outboard processing and uses its front panel as a heat sink to run without a fan. The insert points let an installer patch in an equalizer, compressor, or limiter between the mixer and the amplifier, for system tuning or speaker protection. Cooling the amplifier through the front-panel heat sink means no fan noise intrudes on a quiet cafe or conference room, an important detail in a space where people are talking. That passive cooling does run the panel warm under load, which is normal for the design. For a small venue that values quiet operation and the option to add processing, those two features make the MA2355 both flexible and unobtrusive.

Compact 1RU Build for Tight Racks

The MA2355 fits a single rack space at 19 by 1.75 by 5 inches, with a specified 20 Hz to 20 kHz frequency response for full-range audio. Its shallow 5-inch depth suits the shallow racks and cabinets common in small installs, where a deep amplifier would not fit. The full-band frequency response means it reproduces music and speech accurately across the audio range. A single rack unit leaves room in a small rack for other gear. For an integrator building audio into a cafe counter, a bar cabinet, or a meeting-room rack, the MA2355's compact, shallow chassis is what lets a complete mixer-amplifier fit where space is tight.

Small Bars, Cafes, and Meeting Rooms

The MA2355 is built for the small light-commercial spaces that need real stereo sound with a microphone on hand. Bars and cafes run background music from a couple of sources and keep a mic ready for announcements or trivia night, while retail spaces play music with occasional paging. Conference and meeting rooms use it to combine a presentation feed, a music source, and a microphone into the room's speakers. Because it delivers clean stereo, hosts real mics with phantom power, and fits a shallow rack, it suits these rooms far better than a distributed 70V amp. For a small venue that wants good sound and simple mic-plus-music mixing, the MA2355 is the right-sized amplifier.