The Rolls RM85 is a professional two-zone microphone and line-level mixer designed for routing and controlling audio in multi-room or dual-zone installations. Featuring four balanced XLR microphone inputs and four stereo RCA line inputs, the RM85 provides versatile mixing options across two independently controlled output zones. Each mic input includes a level and tone control, while the master section allows separate volume control for Zone 1 and Zone 2 outputs. Housed in a rugged single-rack unit chassis, the RM85 is ideal for commercial sound applications such as restaurants, worship spaces, meeting rooms, and event venues requiring flexible, reliable zone mixing.

• Four XLR balanced inputs with +48 V phantom power
• Four stereo Source inputs, including a front panel 3.5mm input
• Master Output Level control for each channel
• Low noise, efficient operation
• All in a single rack space
• Input Impedance: Mic: 600 Ohms XLR balanced Line: 22K Ohms RCA
• Max Input Level: Mic: -14 dBV Mic level Line: +24 dBV
• Total input Connectors: 4: XLR, 4: Stereo 1/4", 1: 3.5mm
• Phantom Power: +48 VDC
• RCA Output Level: +17 dBV max (impedance 1K Ohm)
• Max Gain: Mic: 70 dB Source: 30 dB
• Noise Floor: - 80 dB, THD: <.025%
• S/N Ratio: 96 dB
• Voltage Gain: 32 dB
• Nominal Supply Voltage: 15 VDC
• Bandwidth: 20Hz - 25 kHz
• Size: 19" x 1.75" x 4" (48.3 x 4.5 x 10 cm)
• Weight: 7 lbs. (2.3 kg)
• Power supply: Rolls PS27s power supply 15 VDC 500 mA TIP NEGATIVE.