Perfect for musicians and audio professionals, the Rolls HE18 is a two-channel audio hum and buzz remover that virtually eliminates 60 Hz hum from a balanced or unbalanced line. The unit also converts unbalanced signals into balanced signals and vice versa, improving the overall noise performance of your audio system. Easy and convenient to use, the HE18 is completely passive and doesn't require power to operate.
- For Musicians and Audio Professionals
- Helps Eliminate Ground Hum and Buzz
- Dual Channel Operation
- Inputs: 2 x 1/4" TRS, 2 x RCA, 3.5mm TRS
Rolls HE18 BUZZ OFF Overview
Rolls HE18 BUZZ OFF Specs
Not Specified by Manufacturer
4.15 x 2.46 x 1.55" / 10.54 x 6.25 x 3.94 cm
1 lb / 0.5 kg
|Box Dimensions (LxWxH)|
7.9 x 4.6 x 2"
Rolls HE18 BUZZ OFF Reviews
Reasonable Cost Performance Compromise
Tested it prior to installation, 60dB THD+N, Relatively flat frequency response but it had LF cutoff above 20Hz. It's not Jensen JT-11P transformer performance but it's also at a much lower cost than a pair of Jensen transformers.
Quality Product that Solved the Problem
It solved the 60hz hum in a finicky class A headphone amp that had a hum no matter the configuration. Now I have pleasant emptiness behind the music. My second Rolls purchase. Affordable well-built products from a US company is always a plus. Fast shipping from B&H.
Solved my ground loop
I had a bad ground loop hum when connecting an AV receivers unbalanced outputs to a mixer. This fixed it.
Eliminates hum as advertised!
I had an awful ground loop hum to 2 different mixers and nothing I tried worked, until I found this little guy. Just plug your audio inline with it, and presto - hum eliminated!
Say goodbye to 60hz buzz - works perfectly!
I've always kept studio monitors in my editing bay and before Thunderbolt docks, I never had a problem with 60hz buzz. 3 iterations of Thunderbolt and 3 docks later, I've got all kinds of interference and ground loops, and having made a recent switch in desktop setups, a 60hz buzz with all kinds of tonal electronic whining reared its ugly head. It was so bad I had to eliminate my studio monitors from my desktop, which just isn't right. Toss in the HE18 and voila, it's all gone! For a passive unit, it's well built and even looks nice. Plus, it seems pretty tough so I wouldn't have any qualms about taking it into the field. Totally worth it!
Worked fine for me
Needs no power to work. Is very flexible in i/o terms. No negative sonic effects detected so far (at first full week). My 60 Hz hum problem is gone!
BEWARE WHERE YOU PLACE THIS UNIT!!!!!
I recently purchased 2 of these units to help eliminate ground loop noise within the signal cables going to the amps. After installation the ground noise was worst! Consquestly, it took us a week re-checking all signal cables trying to find a solution. After calling other sound engineers for advice, One engineer asked me if I installed the ROLLS HE18 into the system and I told him YES. Without hesitation, he told me he had the same problem on a job in lower Manhattan and after 3 weeks he found what the problem was. After removing the ROLLS from the rack shelf and letting it hang down without touching anything the HUM finally disappeared. We did this and the hum disappeared! My biggest proplem is WHY does'nt the manufacture state any of this in their installation instructions!! WHY IS THE UNIT NOT INSULATED WITH RUBBER or BARRIER TO PREVENT THIS FROM HAPPENING!!! THAT IS WHY A GAVE IT A 1 STAR!!
Works as stated
I have a small sound system for my computer. I wanted to add a television to this system with a small 2 channel mixer. I got a loud grounding hum. I tried many things to get rid of this like making sure all the devices were plugged into the same AC outlet, making sure every unit was grounded correctly, etc. No success. I purchased this unit because of the different inputs and outputs so that it would be versatile for other applications if I wanted to use it for another purpose in the future. It works great. No hum and great audio quality. And it stereo.
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