Rolls MA1705 5-Input 70V Mixer/Amplifier, 70W (1RU)

Rolls MA1705: 70-Volt Mixer/Amplifier for Distributed Sound

The Rolls MA1705 is a 1RU 70-volt mixer/amplifier that combines a five-input mixer and a 70-watt power amp for distributed speaker systems. It exists to be the complete front end of a commercial paging and background-music system, mixing microphones and music sources and driving a 70V speaker line from one rack unit. Two XLR microphone inputs and three stereo RCA source pairs feed the mix, with phantom power, per-mic tone controls, and mic priority ducking built in. A 1/4-inch amp insert and a stereo record output add flexibility, and the whole thing fits a single rack space. For restaurants, schools, and retail installs that need paging over music through many speakers, the MA1705 is the all-in-one engine.

70-Volt Output for Distributed Speaker Systems

The MA1705 delivers 70 watts on a 70-volt output, the standard for driving many speakers across a large area from one amplifier. A 70V distributed system steps the audio up to a higher voltage so a single amp can feed dozens of ceiling or wall speakers over long wire runs with minimal loss, each speaker tapping the power it needs. That is the difference between wiring a whole building for sound and being limited to a few nearby speakers. Seventy watts is sized for the small-to-midsize commercial spaces this amp targets. For a restaurant, shop, or school hallway that needs even coverage everywhere, the 70V output is the core capability the MA1705 is built around.

Mixes Two Microphones and Three Stereo Sources

The MA1705 accepts two XLR microphone inputs and three stereo RCA source pairs, blending paging mics and music sources into the distributed output. The mic inputs are proper balanced XLR channels for real microphones, while the three source pairs handle media players, a tuner, and a computer or phone feed. Mixing all five into one output means a single amp handles both the announcements and the background music a venue needs. Each source has its own level so the blend holds through the day. For a commercial space that plays music but must interrupt it to page, having dedicated mic and source channels on the amplifier itself is what makes the system work from one box.

Phantom Power and Per-Mic Tone Controls

The MA1705 provides phantom power for condenser microphones and individual tone controls on each mic channel, plus bass and treble on sources two and three. Phantom power sends DC up the balanced mic cable to run condenser microphones, so the amp can host sensitive gooseneck and paging mics rather than dynamics only. Per-mic tone controls let an installer shape each microphone for intelligibility, taming a boomy podium mic or brightening a dull one independently. Tone controls on the music sources tailor the background sound to the room. For a paging system where announcements must be clearly understood over music, those per-channel adjustments are what keep every voice clean and intelligible.

Mic Priority Ducking for Clear Paging

The MA1705 includes mic priority that automatically ducks the music when someone speaks into a paging microphone. Priority ducking senses the mic signal and lowers the level of the music sources, so an announcement cuts through clearly, then the music returns to full level when the page ends. That automatic behavior means staff never have to manually turn the music down to be heard, which is exactly what a busy restaurant or store needs. The ducking happens inside the amplifier with no external logic to wire. For any venue where a live page has to be understood over background music, mic priority is the feature that guarantees the announcement is heard.

Amp Insert, Record Out, and 1RU Install

The MA1705 adds a 1/4-inch amp insert jack and a stereo RCA record output, all in a single 19-inch rack space. The amp insert lets an installer patch in outboard processing, such as an equalizer or limiter, between the mixer and the power amp for system tuning or speaker protection. The record output taps the mix for capture or to feed another zone or a hearing-assist system. Fitting all of this into one rack unit keeps the install compact in a crowded rack. For an integrator building a commercial audio rack, those extra connections plus the 1RU footprint make the MA1705 a flexible, space-efficient core for the whole system.

Paging and Background Music for Commercial Installs

The MA1705 is built for the venues that need music plus announcements through a building-wide speaker system. Restaurants and retail stores run background music on the source channels and page staff or customers over the mic with automatic ducking, while schools and houses of worship use it for hallway and room audio with announcements. Gyms and fitness studios drive distributed speakers with music and a paging or instructor mic. Because it combines mixing, 70V amplification, and priority in one unit, it replaces a rack of separate boxes. For a small-to-midsize commercial install that needs both music and paging on many speakers, the MA1705 is the complete, self-contained solution.