Rolls MA2152 5-Input Stereo/70V Mixer/Amplifier, 100W/Ch (2RU)

Rolls MA2152: High-Power Stereo and 70-Volt Mixer/Amplifier

The Rolls MA2152 is a 2RU five-input mixer/amplifier that delivers up to 100 watts per channel in stereo or 200 watts bridged into a 70-volt line for larger distributed installs. It exists to power the bigger commercial spaces where the MA1705 runs out of headroom, mixing microphones and sources and driving speakers in stereo, at various impedances, or on a 70V bus. Two phantom-powered mic inputs and three stereo sources feed the mix, with tone controls and priority talkover for clean paging. Flexible output matching covers 4, 8, and 16 ohm speakers, 25V, and 70V without an external transformer. For churches, schools, and larger venues that need serious power plus paging, the MA2152 is the high-output engine.

100 Watts Per Channel or 200 Watts Bridged

The MA2152 outputs 100 watts RMS per channel into 4 ohms, 70 watts per channel into 8 ohms, or 200 watts RMS bridged into 8 ohms or a 70V line. That power range lets one amplifier scale from a stereo pair of loud speakers to a large distributed system, depending on how it is wired. Bridging combines both channels into a single higher-power output for a 70V run that must feed many speakers across a big space. Having this much output on tap means the system stays clean and undistorted even at high volume in a large room. For a venue whose size demands real amplifier power, the MA2152's output is what fills the space without strain.

Flexible Speaker Matching From 4 Ohms to 70 Volts

The MA2152 matches 4, 8, and 16 ohm speakers, a 25V stereo bus, and a 70V mono line, all without an external matching transformer. That flexibility means the same amplifier can drive a pair of low-impedance loudspeakers in one room or a building-wide 70V distributed system in another. A 70V line lets many speakers share one amplifier over long runs, while direct 4-to-16 ohm operation suits a couple of high-power speakers up close. Because the matching is built in, an integrator does not have to add or wire a separate transformer to switch modes. For an install whose speaker layout might change or span both approaches, that all-in-one output matching is a major practical advantage.

Two Mics and Three Sources With Phantom Power

The MA2152 mixes two microphone inputs with phantom power and three stereo source inputs, covering both paging and music in one amplifier. The mic channels supply phantom power so condenser paging and podium mics work directly, while the three stereo sources handle media players, tuners, and computer feeds. Bass and treble controls on sources one and two let an installer shape the music to the room. Blending all five inputs into the powered output means a single unit handles the entire front end of the system. For a larger venue that needs multiple mics and several music sources through one powerful amplifier, that input count on the MA2152 keeps everything in one rack device.

Priority Talkover on Mic and Source

The MA2152 provides priority talkover on microphone one and on source three, automatically dipping other audio when a priority signal is present. Priority talkover senses the higher-priority input and lowers the competing sources so an announcement or emergency message cuts through clearly, then restores them afterward. Having priority on both a mic and a source input allows layered control, such as an all-call microphone that overrides everything and a source that overrides music. That automatic ducking means clear paging without manual mixing during a busy moment. For a facility where announcements or messages must always be heard over the program, dual-priority talkover is the feature that guarantees it.

2RU Build for Larger Distributed Installs

The MA2152 packs its high-power amplifier and mixer into a 2RU rack chassis with a specified 60 Hz to 30,000 Hz frequency response. Two rack units give the amplifier room for the heat sinking and transformer that its higher output demands, keeping it reliable under sustained load. The wide frequency response means it reproduces both music and speech cleanly across the audio band. Its rack-mount build is made for the permanent equipment rack of a commercial or worship facility. For an integrator sizing a system for a bigger room, the MA2152 delivers the power and connectivity of several boxes in a single, serviceable 2RU unit.

Larger PA and Distributed Audio Systems

The MA2152 is built for the bigger commercial and worship spaces that need both power and paging. Larger restaurants and retail stores drive multi-zone distributed audio with background music and staff paging, while churches and schools power a main room plus overflow or hallway speakers. Multi-zone background-music systems use its flexible outputs and priority to keep music playing until an announcement takes over. Because it combines high-power stereo or 70V amplification, mixing, and priority in one unit, it anchors a whole system from a single rack. For an install too large for a compact amp but not needing a full rack of separates, the MA2152 is the right-sized powerhouse.