Lowell MA60
60W Mixer, Amplifier


The Lowell MA60 Mixer and 60W power amplifier is powered via switchable 115VAC or 230VAC at 50/60Hz or 24VDC. Includes five channel volume controls, treble and bass controls, master volume control, main power switch, and LED display bank for output level. Includes rackmount kit for 19" rack.

Lowell MA60 Mixer Amplifer Features:

  • Five input channels, switchable from XLR mic connector to AUX input dual combining RCA-phono connectors
  • Includes 4W, 8W, 25V, and 70V speaker outputs at a screw terminal strip
  • AUX-6 input channel with dual combining RCA-phono connectors and rear level control
  • Main AC input protected by circuit breaker on rear panel
  • Unswitched (always on) AC outlet in rear is protected by separate circuit breaker
  • Mic-1 mutes channels 3–6
  • Separate telephone input with level control in rear mutes all other inputs
  • Dual RCA/phono parallel tape-out connectors and dual RCA-phono parallel PRE-OUT (preamp out) connectors
    in rear. Jumper couples one PRE-OUT jack to POWER-AMP-IN jack
  • Chassis-ground termination screw in rear
  • Rack mounting brackets included

Lowell MA60 Mixer Amplifer Specifications:

  • AC Supply Voltage: 115 or 230 VAC (rear panel switchable); ±10%, 60Hz
  • DC Supply Voltage: 24 VDC (Max. 10% deviation)
  • Power Consumption: 150W (AC) 5A (DC)
  • Dimensions (WxHxD): 17" x 3.5" x 13.5" [431.8 x 88.9 x 342.9 mm]
  • Unit Weight: 17 lbs. [7.7 kg]
  • Speaker Level Outputs: Screw terminal strip, 4 ohms, 8 ohms, 25V, 70V (60W RMS)
  • Tape Outputs: Dual parallel RCA-phono jacks, 1V @ 4.7k ohms
  • Preamp (“Pre”) Outputs: Dual parallel RCA-phono jacks, 1V @ 600 ohms
  • Unswitched AC Outlet: 500W maximum
  • MIC Inputs 1–5: XLR receptacle or screw terminals, 1mV @ 600 ohms balanced
    • Note: With channel AUX switch depressed, XLR and screw terminal inputs still operate
      but are padded as line input 150mV @ 600 ohms balanced.
  • AUX Inputs 1-6: Dual parallel RCA-phono jacks, stereo converted to mono, 150mV @22k ohms
  • Telephone Input 7: Screw terminal strip, 150mV @ 600 ohms balanced
  • Power Amp In: RCA-phone jack, 1V @ 8k ohms
  • Frequency Response: 50Hz – 20kHz ±3dB (Test signal inserted at AUX input)
  • Total Harmonic Distortion: Less than 1% at 1kHz at rated power.
  • Signal to Noise Ratio: 
    • 80dB (Test signal inserted at AUX 6 input)
    • 60dB (Test signal inserted at MIC 1 input)
  • Tone Controls: 
    • Bass ±10dB @ 100Hz
    • Treble ±10dB @ 10kHz
  • Phantom Power: 16VDC, shipped from factory with internal phantom power jumpers set “ON” for
    channels 1-5. To defeat phantom power, remove cover and set jumpter to “OFF.”
    Channel-1: see jumper JP1, Channel-2: see jumper JP2, Channel-3: see jumper
    JP3, Channel-4: see jumper JP4, Channel-5: see jumper JP5.
  • Priority Muting: Three levels of priority. See “Amplifier Muting–Priority Scheme” in Installation Instructions.
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