Mackie HM-400 4-Channel Headphone Amplifier

Mackie HM-400 4-Channel Headphone Amplifier

Marsoni

M251S

$222.50

Get it in 3 business days with 1 day shipping. Friday, May 29

Mackie HM-400 4-Channel Headphone AmplifierMackie HM 400: Versatile 4 Channel Headphone Amplifier for Clear Monitoring Deliver clear and custom headphone mixes with the Mackie HM 400 4 Channel Headphone Amplifier. Housed in a rugged 19" rackmount chassis, this amplifier is perfect for studios, practice spaces, and stages, providing reliable monitoring for multiple listeners. Key Features Four Independent Channels: The HM 400 offers four channels, each equipped with three headphone outputs,

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As the title says the filter wasn’t green this time (purchased 3 other times). I read off the numbers to Ecogard technical support and they said it was their filter and by the date code manufactured by a different factory. This one was grey/black with blue edge and you could tell there was charcoal embedded in it. Not sure if it will perform the same and smell the same, as I preferred the scent of the green one. The listing needs to be updated with the correct picture if the green isn’t made anymore.

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Reviewed in the United States on March 11, 2026

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Davian

Lake Worth, US

★★★★★ 5

Very clean air quality.

Size: 8" x 10" x 2"

Immaculate air quality. Easy to install.

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Reviewed in the United States on July 24, 2025

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Kimmy

Omaha, US

★★★★★ 5

Effective

Size: 8" x 10" x 2"

Works great

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Reviewed in the United States on September 19, 2025

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Joseph Bod

Charlottesville, US

★★★★★ 5

Fits 2021 Acura TLX

Size: 8" x 10" x 2"

Amazon garage and mfg website hadn't caught up, yet: this does fit the 2021 Acura TLX SH-AWD. No problems. New way of getting access -- pinch sides of glove box and drop off of hinge. Old way required removing an access panel.

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Reviewed in the United States on June 14, 2021

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Lexington, US

★★★★★ 5

Worth it.

Size: 8" x 10" x 2"

Super easy to install. The increased airflow is definitely noticeable.

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Reviewed in the United States on August 1, 2024