Lowell Manufacturing MA250 Rackmount Mixer with 250W Amplifier
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Lowell Manufacturing MA250 Rackmount Mixer with 250W Amplifier

SKU: LWMA250 MFR: MA250
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Key Features

  • Experience powerful sound with this 250W amplifier, perfect for installations.
  • This mixer amplifier features multiple input options for mics, aux, and telephone.
  • Achieve optimal audio with bass and treble controls on this versatile amplifier.
  • Enjoy clear sound with a wide frequency response using this rackmount mixer.
  • Easily connect speakers with 4, 8, 25, and 70V outputs on the amplifier mixer.
  • Use the priority muting feature for announcements via the telephone input.
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Special Order?Estimated to Ship: 09/25/2025
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Lowell Manufacturing MA250 Specifications

  • AC Supply Voltage

    115 or 230 VAC (rear panel switchable); +/-10%, 60Hz

  • DC Supply Voltage

    24 VDC (Max. 10% deviation)

  • Power Consumption

    600W (AC) 16A (DC)

  • Speaker Level Outputs

    Screw terminal strip, 4 ohms, 8 ohms, 25V, 70V (250W RMS)

  • Tape Outputs

    Dual parallel RCA-phono jacks, 1V at 4.7k Ohms

  • Preamp ("Pre") Outputs

    Dual parallel RCA-phono jacks, 1V at 600 Ohms

  • Unswitched AC Outlet

    500W maximum

  • MIC Inputs 1-5

    XLR receptacle or screw terminals, 1mV at 600 Ohms balanced

  • AUX Inputs 1-6

    Dual parallel RCA-phono jacks, stereo converted to mono, 150mV at 22k Ohms

  • Telephone Input 7

    Screw terminal strip, 150mV at 600 Ohms balanced

  • Power Amp In

    RCA-phone jack, 1V at 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 at 100Hz, Treble +/-10dB at 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

  • Dimensions (HxWxD)

    3.5 x 17 x 13.5" (8.89 x 43.18 x 34.29cm)

  • Weight

    24 lbs (10.89kg)

About Lowell Manufacturing MA250

Make your audio experience exceptional with the MA250 Rackmount Mixer with 250W Amplifier. This high-quality, powerful sound system is designed to deliver superior audio performance, whether you're using it for live sound reinforcement or recording applications.

Engineered with versatility in mind, this rackmount mixer boasts five distinct channels, allowing you to seamlessly mix multiple audio sources simultaneously. This feature makes it an ideal choice for a variety of applications, from small to medium-sized venues to professional recording studios.

The MA250 Rackmount Mixer is equipped with a robust 250W amplifier, offering a high power range of 100 to 299 watts. This makes it a reliable choice for larger events and venues where a more potent sound system is required.

This durable mixer is powered via switchable 115 or 230 VAC at 50/60Hz or 24VDC, providing flexibility and convenience. It also includes individual volume controls for each channel, as well as treble and bass controls, allowing you to fine-tune your sound to perfection.

The master volume control ensures overall sound management, while the main power switch offers easy operation. The LED display bank for output level provides a clear, visual representation of your audio output, ensuring optimal sound quality at all times.

Experience the power and versatility of the MA250 Rackmount Mixer with 250W Amplifier, and elevate your audio experience to new heights.

Lowell Manufacturing MA250 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
  • Un-switched (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
  • Chassis-ground termination screw in rear
  • 19" E.I.A. rackmount chassis (17" x 13.5" x 3.5")

Warranty Information

This product has a limited warranty of 12 months.

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Product Documents

User Manual

Key Features

  • Experience powerful sound with this 250W amplifier, perfect for installations.
  • This mixer amplifier features multiple input options for mics, aux, and telephone.
  • Achieve optimal audio with bass and treble controls on this versatile amplifier.
  • Enjoy clear sound with a wide frequency response using this rackmount mixer.
  • Easily connect speakers with 4, 8, 25, and 70V outputs on the amplifier mixer.
  • Use the priority muting feature for announcements via the telephone input.

What's in the box:

  • Lowell Manufacturing MA250 Rackmount Mixer with 250W Amplifier
  • Rack Mounting Brackets
  • Lowell Manufacturing 1 Year Limited Warranty