What is the amplification amount of this device? I am going to connect to tv out with low sound level and need to increase the sound output for 2 peop

Its definitely enough for two people. I use it to play electronic drums along with music tracks and it works well. Tv would probably require less volume and be equally acceptable.

Does the mackie hm-4 come with a 1/4" to 1/4" tsr cable in addition to the included 12v power supply?

Hi, no it comes with HM-4 and the 12 VDC Power Supply, that's all,. Typically manufacturers don't give cables like that since it adds to the cost for them, and many people already have tons of cables. Please let us know if you have any other questions, thank you

Does this work in reverse, i.e., can I plug 4 stereo (line level) inputs and mix them to a single stereo output?

No, it is one input only, it's not designed (nor will it work) in the opposite direction

do the mackie hm-400 bass, treble and balance pots have a detent?

I dint know. I obliterated have the 4-user version, which does not have any sort of adjustment aside from volume... and there's is no detente.

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MACKIE HM-4 4-Way Headphone Amplifier

Product ID: 732936761

Details

Brand
Mackie
Color
Black
Item Weight
0.5 Pounds
Product Dimensions
5.8D x 10.9W x
Speaker Size
0.25 Inches

🎧4 headphone outputs

🔊individual volume control

🛡️rugged tank-grade design

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AR$192816

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Sold byAmazon ArgentinaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎧 Amplify your crew’s vibe — 4 ways, zero compromises!

COMPACT PORTABLE - Ultra-compact design fits seamlessly into any home or studio setup.
AFFORDABLE PRO AUDIO - Premium Mackie sound quality at a price that won’t break the bank.
QUAD LISTENING POWER - Connect 4 headphones simultaneously without losing audio fidelity.
STUDIO GRADE DURABILITY - Built tough with tank-grade materials for long-lasting reliability.
PERSONALIZED VOLUME CONTROL - Each listener sets their perfect sound level independently.

The MACKIE HM-4 is a compact 4-way headphone amplifier designed for professional and home use, delivering high-definition stereo sound to four headphones simultaneously. Featuring individual volume controls and a rugged tank-grade build, it ensures durable, personalized listening experiences. Perfect for studios, rehearsals, or shared audio enjoyment, it combines Mackie’s trusted audio quality with affordability and portability.

Specifications

ASIN	B079C8MLG8
Amazon Bestseller	#70,423 in Electronics ( See Top 100 in Electronics ) #111 in Headphone Amps
Brand	Mackie
Color	Black
Connector Type	Stereo Standard
Customer Reviews	4.4 out of 5 stars 1,854 Your Review
Global Trade Identification Number	00663961054873
Item Dimensions D x W x H	5.8D x 10.9W x 5.1H cm
Item Type Name	Headphone Amplifier
Item Weight	227 g
Manufacturer	MACKIE
Output Channel Quantity	4
Power Source	Corded Electric
Product Dimensions	5.8D x 10.9W x 5.1H cm
Speaker Size	0.25 Inches
UPC	663961054873 663961054057

Reviews

ノ**ノ

良い

ＰＣ（ＵＳＢ）→3.5mm to 6.35mmケーブル→ＨＭ4→3.5mmイヤホン・ヘッドホンという構成ですが、無音の時にノイズが流れるなどはなく、問題なく使えました。

21.01.2025

北**ん

安価

安価で普通に使えました

26.10.2025

A**ー

behringer h400 との比較

他のレビューにもあるようにこのアンプは元の音を良くも悪くもかなり尊重する印象。ノイズも全然入らない。 behringer h400 の音の方が僕は好みですが、ノイズが乗ってしまうのと、それから買ったのが廉価版でアダプターのショートが不安なのでこれと交換。ここから主観が強いのでなんとも言えないですが、HM-4のボリュームとスピーカのボリューム、いずれもある程度高いほうが解像度は上がると思われる。手元環境では全くノイズが入らないのでh400よりもボリューム上げられる。（この意味で，h400では使い物になるボリュームはちょっと物足りなかった）。また、HM-4はボリュームを上げすぎると今度は解像度が荒くなって音が潰れる（気がする）。

12.01.2021

T**K

MACKIEらしい商品

PCのオーディオインターフェイスから出力する音を同時に複数のヘッドホンでモニターするために購入。音質は当然問題無し。筐体、ジャック、ノブなど実にMACKIEらしい、堅牢さをうかがえる作り。

3.01.2024

安**人

機能には問題ない、電源ポートが前面にある

個人的に電源ポートは裏面にあって欲しかったが、機能はとてもいいです

16.07.2024

し**う

電源ハムノイズが乗る

ブーンという電源からのハムノイズが大きめです。サーというホワイトノイズも多めです。

5.02.2024

A**ー

期待どおりの性能だけど・・・

ブルーレイレコーダーをPC用のモニタにつなげて、音声出力を小型スピーカーとヘッドフォンで切り替えて使用していますが、音量が不足しており、本ヘッドフォンアンプを購入しました。性能は申し分欠く、作りもがっしりしていて大変気に入りましたが、入力が1系統しか無いので、★を1つ減らしました。PC2台とブルーレイレコーダーの3入力を同じスピーカーとヘッドフォンで切り替えて聴くために、本ヘッドフォンアンプの出力を別のオーディオスイッチ（アナログセレクター）に入力して使っています。2つの入力を切り替えて使える仕様のものがあれば満点なのですが・・・・

9.05.2021

C**R

Mackie all the way!

I love this brand! Great products that are reliable, easy to use and setup!!!

20.10.2021

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