Kopul HMX-2 Humbuster – Dual-Channel Hum Eliminator with XLR and 1/4″ Connectors

(7 customer reviews)



Eliminates Hum: Removes unwanted 60 cycle hum and buzz caused by ground loops

Quiets Cable Noise: Reduces interference and noise caused by excessively long unbalanced cable runs

Preserves Signal Integrity: Removes hum and buzz without compromising signal quality

Balanced to Unbalanced Conversion (and Vice Versa): Allows you to automatically convert between balanced and unbalanced signals

Direct Box: Allows you to directly connect the unbalanced output of a musical instrument to the balanced input of a mixing console

Compatibility: Supports balanced XLR, balanced 1/4″ (6.35mm) TRS, and unbalanced 1/4″ (6.35mm) TS input and output connectors

Inputs: 2x 1/4″ (6.35 mm) TRS/TS
2x XLR-3F
Outputs: 2x 1/4″ (6.35 mm) TRS/TS
2x XLR-3M
Frequency Response: 20 to 70,000 Hz
Distortion: <0.005 THD at 1 kHz
Crosstalk: > -97 dB
Source Impedance: Max: 1 kOhm
Min: 10 kOhms
Dimensions (H x W x D): 1.4 x 4.5 x 3.25″ (3.5 x 11.4 x 8.3 cm)
Weight: 15.2 oz (431 g)

Additional information

Weight 567 kg
Dimensions 16.3 × 5.6 cm
Package Dimensions

‎ 22.4 x 16.3 x 5.6 cm; 567 Grams

Date First Available

‎ 29 August 2016


‎ B01L7P3WHO

Item model number

‎ HMX-2


‎ Kopul, Unknown

7 reviews for Kopul HMX-2 Humbuster – Dual-Channel Hum Eliminator with XLR and 1/4″ Connectors

  1. Jim Bortle

    Most of buzz is gone!
    Eliminated 90% of the buzz I had before. For the price, that is a win. I recommend.

  2. JW

    Ok, but clearly not new
    Item had clearly been opened previously and taped back closed very crudely. Not a “new” item.

  3. Ken M.

    It works
    After adding a power conditioner failed to kill the hum in my setup, I bought one of these and followed the directions. And voila! It did the trick.

  4. Amazon Customer

    Marginal at best
    The hum coming from my acoustic pickup was not really changed by this device. It might work for some but I plugged in 3 different guitars and each one had a nasty hum.

  5. Thomas Green

    Great and works!
    Works perfect. Had to run unbalanced line from my 8ohm sound system to my 70volt PA system. This took the hum right out perfectly. Now I have a great signal:noise ratio.

  6. Rick Arthur

    No effect on system hum then failed
    No effect on hums in the system. Tried to use it as a passive direct box. After a few months a channel internal connection failed. If you move the input wire it cracks, buzzes and disconnects. (Not the wire)Too late to return it $50 bucks lost.

  7. JUAN C

    it doesn’t filter noise.
    did not filter noises; a cheaper brand did the job, but this item

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