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
227 g
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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€ 98.30

Duties & taxes included

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Sold byAmazon SpainDelivered 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	#26,780 in Electronics ( See Top 100 in Electronics ) #44 in Headphone Amps
Brand	Mackie
Color	Black
Connector Type	Stereo Standard
Customer Reviews	4.4 4.4 out of 5 stars (1,883)
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
Mfr Part Number	HM-4
Model Number	HM-4
Output Channel Quantity	4
Power Source	Corded Electric
Speaker Size	0.25 Inches
UPC	663961054873 663961054057

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