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Brand
Knox Gear
Item Weight
1 Pounds
Material
Foam, Alloy Steel


Pump up the sound! With the Knox 4 Channel Headphone Amplifier up to four people can listen to the same audio source with independent volume controls. A compact design makes it portable and easy to use, while a rugged, high-quality steel body provides long-lasting performance that will withstand extended rough use. Turn up the volume and enjoy high powered sound.

PRODUCT SPECS:

  • Unit Size: 4” x 2.25” x 1.5“
  • Input Connector: 1/4” (With 3.5mm AUX Adapter Included)
  • Input Impedance: 1000KQ(unbalance)
  • Max Input Level: +22dB
  • Output Connector: 6.35mm Stereo (With 3.55mm AUX Adapters Included)
  • Output Impedance: Minimum 10 per Ω Channel
  • Max Gain: 20dB Each Channel
  • Signal-To-Noise Ratio: > 98dB
  • 12v DC Power Supply Adapter Included
  • Dimensions: 4" x 2.25" x 1.5"

Features & details

Features

  • FOUR INDEPENDENT CHANNELS: Simultaneously transmit and amplify sound to four earphone sets. With 4 independent volume controls, multiple people can listen to a singular audio source at their own volume preference
  • CRISP AND CLEAR SOUND: Crank up the volume and monitor sound that is smooth and steady. This headset amp has 1/4" stereo input and output, with 1/8 - 1/4 adapters included for input and output. 12v Power adapter included
  • VERSATILE AND MULTI PURPOSE: This headset amplifier is perfect for home and professional use. Use it in recording studios or live stage performances. Great for choirs, podcasting, video gaming, streaming and more
  • COMPACT, PORTABLE AND RUGGED: This ultra-compact design still packs powerful sound. It features non-skid foam feet and a durable steel chassis that can withstand rough and heavy use and travel
  • FEATURES: The amplifier features a non-skid foam feet, stereo input and output, durable steel chassis, and a power indicator

Product information

Product Warranty: For warranty information about this product, please click here
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Customer Questions

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Q: Could you use this to send sound to a car audio source (dc) and a powered speaker (ac) ?

A: Yes with the right interface for the car...
and easily with 1/4 inch signal cables for po…

Amazon Customer | 11 months ago

Q: Can this amp. Accept a microphone input?

A: If you wanted to turn your microphone into a speaker... yes. But this is only to split a s…

Jon Little | 1 month ago

Q: Does this work with ps4

A: I guess you really could. You might have to go headphone from tv into this box and then pl…

Jon Little | 10 months ago

Q: Is there any reports of the dc adapter being faulty/not fitting? after a short time of own…

A: I have had no issues with my power supply. Power supplies are hit and miss with mass produ…

Jon Little | 1 month ago

Customer reviews

4.5 out of 54.5 out of 5
80 global ratings

Top reviews from the United States

rover
5.0 out of 5 starsVerified PurchaseEarly Reviewer Rewards
Quality amplifier.
Reviewed in the United States on March 20, 2019
I purchased the Knox headphone amplifier to use with 2 sets of earphones. The input is from a tv. I wasn''t expecting a large increase in amplitude from such a small and inexpensive device but was blown away by both the volume and quality of the sound. The amp powers a pair... See more
I purchased the Knox headphone amplifier to use with 2 sets of earphones. The input is from a tv. I wasn''t expecting a large increase in amplitude from such a small and inexpensive device but was blown away by both the volume and quality of the sound. The amp powers a pair of Beats headphones and a pair of of Audio-Technica studio phones at about 50% on the volume controls. The amp is solidly constructed and the vol. controls are tight.

The only drawback is the lack of an off/on switch but I just unplug the power cord from the front of the amp when not in use. Four 1/4" to 1 /8" adapters are included which eliminates the need to order them separately. I couldn''t be more pleased with the quality and sound.
2 people found this helpful
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gary enneking
1.0 out of 5 starsVerified Purchase
Almost worthless.
Reviewed in the United States on January 5, 2021
Could barely hear music thru this unit and vocals were completely missing. Carefully checked connections and power and purchased high quality cables and jacks, could not get it to work well at all. Returned it immediately so I gave it 5 stars for Portability, back the box... See more
Could barely hear music thru this unit and vocals were completely missing. Carefully checked connections and power and purchased high quality cables and jacks, could not get it to work well at all. Returned it immediately so I gave it 5 stars for Portability, back the box it came in..
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Rob
3.0 out of 5 starsVerified Purchase
Good. But clips broke.
Reviewed in the United States on February 5, 2021
The spring clips broke. All of them. I like everything else about the amp. But now I need to figure out how to connect my wires.
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sawdust
5.0 out of 5 starsVerified Purchase
Great little amp
Reviewed in the United States on August 19, 2021
What''s not to like, a small compact $30 amp that works great.
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Nancy Donaldson
1.0 out of 5 starsVerified Purchase
It sucks and I got scammed
Reviewed in the United States on May 7, 2021
This product sucks. As soon as I got it out of the box and plugged it in all you could hear is a loud errrrrre sound. And there was no audio going through to my headset, and even when you disable it from your computer it still does the same thing. Do not buy this it is the... See more
This product sucks. As soon as I got it out of the box and plugged it in all you could hear is a loud errrrrre sound. And there was no audio going through to my headset, and even when you disable it from your computer it still does the same thing. Do not buy this it is the worst thing I have ever payed for.
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Natacia
5.0 out of 5 starsVerified Purchase
Works well ThNk u
Reviewed in the United States on September 27, 2021
No dislike it works very well
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DeKalb Dad
5.0 out of 5 starsVerified Purchase
GREAT amp!
Reviewed in the United States on January 12, 2021
Purchased as a gift for my audiophile son and he rated it 5 stars after 2 weeks of use. He loves the sound quality.
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Joshua Emmanuel-Bessong
5.0 out of 5 starsVerified Purchase
Awesome piece of gear
Reviewed in the United States on August 1, 2021
Awesome piece. Can connect 4 headphones at the same time
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