Here’s a clean, professional eBay description you can copy and use:

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Extron MPA 601-100V Mono Audio Amplifier (60-1449-11) – NEW Open Box

The Extron MPA 601-100V is a high-performance, energy-efficient mono audio amplifier designed for professional AV installations. This unit is new open box, never installed, and in excellent condition.

Built with Extron’s advanced Class D technology, this compact amplifier delivers reliable, clean audio output—ideal for distributed sound systems in commercial environments such as offices, classrooms, and retail spaces.

Key Features:

* 60 Watts RMS output @ 100V line

* Compact, quarter rack-width design (1U height)

* High-efficiency Class D amplifier with low heat output

* Extron CDRS™ (Class D Ripple Suppression) for clean, stable audio

* Three stereo inputs (RCA, 3.5mm, and captive screw) summed to mono

* Professional-grade audio performance (>90 dB signal-to-noise ratio)

* Fanless, convection-cooled for silent operation

* UL 2043 plenum-rated enclosure (suitable for in-ceiling installations)

* Remote volume and mute control capability

* Auto standby mode (defeatable) for energy savings

Specifications:

* Model: MPA 601-100V

* Part Number: 60-1449-11

* Output: 1 x 60W @ 100V

* Frequency Response: 80 Hz – 20 kHz

* THD: <0.1%

* Power: 100–240V AC

Condition:

* New Open Box

* Unit may have been opened for inspection or photos only

* Includes original components (verify power supply/accessories if applicable)

* Packaging may show minor wear

What’s Included:

* Extron MPA 601-100V Amplifier

* Power Supply

* (Any included accessories – specify if known)

Ideal For:

* Commercial audio systems

* Conference rooms & classrooms

* Retail or background music systems

* Paging and distributed speaker setups

For any questions feel free to message me.