Rolls HE18 Buzz Off Hum Eliminator

Get the buzz out with this Rolls 2-channel hum eliminator. The completely passive unit also transforms unbalanced signals into balanced signals.

The HE18 is a 2-channel audio hum and buzz remover. Everyone knows how annoying it is to have 60 cycle hum in your sound. Now you can eliminate virtually all ground hum and buzz by simply inserting the HE18 into the audio path. Plus, the unit will convert an unbalanced signal into a balanced signal, and vice-versa. This greatly improves overall noise performance.

Eliminates ground loop hum and buzz

Leaves signal grounds connected

Passive, the unit requires no power

Converts balanced lines to unbalanced lines and vice-versa

Adjusts signal voltages to match difference in ground potential

Frequency response: 20Hz to 70 kHz +/- .5dB

Distortion: < 0.005% THD @ 1 khz

Crosstalk: > -97 dB

Maximum source impedance: 1 kilohm

Minimum load impedance 10 kilohm
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 0.79 lbs
Shipping Dimensions: 8 x 5 x 3 in
Manufacturer Part Number (MPN): RLL HE18

For support or warranty questions, please contact the manufacturer:
Phone: 801-263-9053

Reviewers gave this product an overall rating of 4 out of 5 stars. (7 ratings)
Submitted April 17, 2008 by a customer from

"Hey! This is NOT for guitar pedals."

Overall: 4 out of 5 stars
(see rating details)
Ok, I think the first guy to used this didn't actually know what this is for. This is NOT meant for guitar effect pedals. Your single coil guitar pickup is going to buzz, this won't fix that. This unit works best in between your mixer and power amplifier. OR, in between rack mount effects/processors. That is where it is meant to be. For all other problems, there are other solutions. For your guitar, research copper shielding your guitar. Or perhaps switch out the single coil pickups. Your guitar effect pedals, try getting a "zero hum" AC adaptor. Danelectro makes an awesome one that works with all my pedals. And it pretty much goes without saying get some quality cables. The shorter the cable run, the better. I'm not saying buy Monster Cables, or Mogami cables... But it wouldn't hurt to try a quality cable. What I'm saying is the guy who wrote the review "useless for guitar effects loop" is right. This is useless for a guitar effects loop, and he should have known that before spending $60 on a product he didn't understand the use for. But thats just me, I might be wrong.

Musical Background:

Recording engineer

Musical Style:

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