Marantz MM7025 Two-Channel Power Amplifier

One Hundred and Forty Watts a Side

The MM7025 is a two-channel power amp built to one job: give a preamp or a processor more muscle than it can supply on its own. It makes 140 watts per channel into 8 ohms, measured across the full 20Hz to 20kHz band rather than at a single flattering frequency.

Marantz borrowed the current feedback circuit from its Reference components. Amplification is fully discrete, the transformer is a large-capacity EI type, and the chassis is steel with an aluminum and resin front panel. It is a plain, solid piece of engineering, with no digital section and nothing in it to go out of date.

Both single-ended RCA and balanced XLR inputs are fitted, so the MM7025 mates with a hi-fi preamp or a surround processor without fuss. A rear switch picks which pair is live.

This listing is a new, factory-sealed MM7025 in black, shipped with the full manufacturer warranty. Marantz finishes the front panel in aluminum over glass-reinforced resin, so the fascia keeps its look in a rack that gets handled.

Inside the Chassis

Current Feedback Amplification

Current feedback topology is the Marantz house circuit, and it is here for speed. It settles quickly after a transient, which is what keeps a busy passage sounding separated rather than smeared. The amplification stages are discrete rather than packaged op-amps.

On the Bench

Marantz rates the MM7025 at 140 watts per channel into 8 ohms, from 20Hz to 20kHz, at 0.08% distortion. Signal-to-noise measures 105dB, and frequency response on the analog inputs runs 8Hz to 100kHz within 3dB. It draws 330 watts at full tilt and 0.2 watts in standby.

Living With It

The blue front-panel illumination can be switched off, which matters if the amp sits in a dark room under a screen. It measures 17-3/8 by 4-15/16 by 13-7/8 inches and weighs 23.8 pounds, so a normal shelf takes it without a second thought.

Who Is This Power Amplifier Best For?

• Owners of a receiver running out of steam — Hand the front two channels to the MM7025 and the receiver stops straining, so dialogue stays clean and the big moments land instead of hardening up.
• Anyone building a Marantz system — It speaks the same D-Bus RC-5 language as Marantz preamps and processors, which means one remote and one power-up sequence for the whole rack.
• Listeners with a preamp that has balanced outputs — The XLR input pair is fitted as standard, so a long balanced run from preamp to amp stays quiet and you can put the amp near the speakers.
• Custom installers — A DC trigger in and out, plus an IR flasher input and emitter output, let the MM7025 drop into a controlled rack and behave itself without a line-of-sight remote.
• You want one box for power and another for control — AV 20 is the partner, or any streamer/DAC preamp you prefer

How Does It Connect to Your System?

Run a stereo pair of interconnects from your preamp or processor to the MM7025, on RCA or XLR, then set the rear selector switch to match. Speaker cables go to the single stereo pair of binding posts. That is the signal path finished.

For a rack, wire the DC trigger output of your preamp to the trigger input here and the amp powers up with everything else. A second trigger output passes the signal along to the next box in the chain.

Pairs Well With

A power amp needs a partner to tell it what to do. These are the usual next pieces.

• Preamplifiers — any preamp or processor with a fixed or variable line output will drive it. Browse preamplifiers.
• Balanced interconnects — XLR cables suit the balanced input pair and long runs. Browse interconnect cables.
• Speaker cables — one stereo run from the amp to your main pair. Browse speaker cables.
• Floorstanding speakers — 140 watts a side suits full-range designs in a medium or large room. Browse floorstanding speakers.

Frequently Asked Questions

How much power does it make?

Marantz rates it at 140 watts per channel into 8 ohms, measured from 20Hz to 20kHz at 0.08% total harmonic distortion. That is a full-bandwidth rating, so it reflects what the amp does with music rather than a single test tone.

Does it take balanced connections?

Yes. Both single-ended RCA and balanced XLR input pairs are fitted, and a selector switch on the rear panel chooses which one the amp listens to. That covers hi-fi preamps and surround processors alike.

Can I use it for the front channels of a home theater?

Yes, and it is a common way to use it. Feed it from the front left and right pre-outs of your receiver or processor, and the MM7025 takes over the two channels that do most of the work.

Will it fit a Marantz rack?

Yes. D-Bus remote in and out on RC-5, a DC trigger in and out, and an IR flasher input with emitter output all let it join a Marantz system and follow the same commands as the rest.

How big and heavy is it?

It measures 17-3/8 by 4-15/16 by 13-7/8 inches and weighs 23.8 pounds. It runs on 120 volts at 60Hz, drawing up to 330 watts under load and 0.2 watts in standby.

What warranty does it carry?

Marantz covers the MM7025 with a three-year warranty in the United States. Keep your receipt, since coverage runs from the date of purchase.

See It in Action

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