Rolls MX22s Mini-Mix 2-Channel Line Mixer, Drives a Power Amp Directly

Rolls MX22s Mini-Mix: A Tiny Two-Channel Line Mixer That Drives an Amp

The Rolls MX22s Mini-Mix is a very compact two-channel line mixer that blends a 1/8-inch line source and a stereo RCA source into a single output with enough level to drive a power amplifier directly. It exists for the simplest of AV problems: combining two playback sources, such as a laptop and a CD player, into one feed without a full mixer in the way. At 2.75 by 2.35 by 1.5 inches it disappears onto a shelf or into a rack corner, yet its output is strong enough to feed an amplifier without an extra preamp stage. An internal jumper selects stereo or mono operation to match the system. For AV playback, fitness rooms, and presentations that need two sources combined and sent to an amp, the MX22s is the smallest tool that does it.

One 1/8-Inch and One Stereo RCA Input

The MX22s takes a 1/8-inch line source on channel one and a stereo RCA source on channel two, with 10k ohm and 20k ohm input impedances and up to 32 dB and 20 dB of gain respectively. Channel one suits a laptop or media player on a 1/8-inch cable, while channel two fits a CD player or similar RCA device. The healthy input impedances keep the mixer from loading down either source, preserving tone and level. Because each channel has its own gain range, a quieter source can be brought up to match a louder one. For a room that simply needs a computer and a disc player combined, those two well-matched inputs cover the job.

Enough Output to Drive a Power Amplifier

The MX22s delivers its mix from a low 50 ohm output impedance with enough level to drive a power amplifier directly, skipping the extra preamp a weaker mixer would need. A strong, low-impedance output can push a signal down a cable run to an amp without losing level or picking up noise. That means the MX22s can sit between two sources and a power amp as the only device in the chain, which keeps a simple playback system simple. In a fitness or presentation room, one small box combines the sources and feeds the amplifier that drives the speakers. For an installer who wants the fewest boxes possible, an output that drives an amp directly is exactly what the job needs.

Selectable Stereo or Mono in a Pocket-Sized Build

An internal PCB jumper sets the MX22s for stereo by default or mono when a system needs a summed feed, all within a 2.75 by 2.35 by 1.5-inch, 1-pound chassis powered by an included 15 VDC PS27s adapter. Choosing mono is useful when the amplifier or speaker system is single-channel, so the two sources sum cleanly rather than losing one side. The tiny footprint lets the mixer hide almost anywhere in a rack or on a shelf. The included, matched power adapter removes any guesswork at setup. For a permanent install where space is tight and the configuration rarely changes, that set-and-forget jumper and compact build fit perfectly.

AV Playback, Fitness Rooms, and Presentations

The MX22s handles combining a laptop or media player with a CD player for AV playback, aerobics and fitness studio audio, simple two-source install playback into a power amp, and presentation and background-music setups. A fitness studio can run a music playlist from a laptop and a backup source on RCA, combined into the room's amplifier from one small box. A presentation room can merge a computer's audio with a secondary player without a full console. Because its output drives an amp directly, it is often the only mixer a simple system needs. For any space that just needs two sources blended and sent to speakers, the MX22s is the compact answer.