Professional Feedback Suppressor, 6in6out Microphone Anti-Howling Device, Automatic Frequency Shifter for Clear Audio in Stage Performances, Conferences, and KTV Systems

Great product. But it does has a ground loop buzz but it’s little. Does really decent at rejecting feedback on our shure slxd mics. Also great for karaoke if your have speakers pointing in front of the mic it drop that feedback and suppresses it.

I was pleasantly surprised by this. To be honest, I was half expecting I’d end up writing a scathing review, but I’ll be recommending this as the sleeper hit of 2026. I went into this fully prepared for some level of irritation. But… that never really happened during my setup and testing. Everything hooked up easily with no real second-guessing about what went where. I tested it with a mic setup and intentionally pushed things a bit because I wanted to see how it handled that lovely moment where everything starts screaming at you. It caught it fast. Not in a way where it felt like it was crushing the sound or making everything weirdly flat either. That’s usually the where stuff like this either impresses you or pisses you off. I was impressed. Another plus is that there are a lot of connection points on the back. It gives you mad flexibility. I HATE being boxed into a very specific setup. I will say, I can’t speak to how this is will hold up long-term since I’ve only had it for a little bit. But right now, based on how it actually performs? I very much look forward to having this in my arsenal. I went in expecting a headache and didn’t get one, so I’m one happy camper.

Arriving late, this is my second one because the first one failed.

This review is for the Aobole brand of feedback suppression rackmount box (6x XLR in/out). The product is 1u in height. I put in a little 8u desktop rack I use for my audio interface and recording equipment. The product works well for eliminating howl from reverb and high microphone gain especially when 2 or more mics or pickup devices are in use. This sits between an analog signal from a mic, for example, and the dac whatever that might be. Too bad it doesn’t also do ground loop suppression cuz I could use that too. Regardless the product works as advertised and I give it my highest recommendation.

Professional is absolutely correct. It has plenty of connections to hook a good amount of equipment up. Everything is plug and play too. Very quick very easy to set up. The labels, functions, controls, everything you need is simple. It has outstanding sound and feedback control. Just as I thought it would. This is one of the nicest setups I’ve had in a long time. Quality like this is hard to find anymore. It’s more expensive than some others but if you want something good that will last, don’t cheap out on a lower priced one. Spend a little more and get this one. It’s worth it.

This feedback suppressor is an excellent purchase and a huge improvement for live audio setups. It does a great job automatically detecting and eliminating feedback and unwanted howling, making microphones sound much cleaner and more professional during performances, conferences, or karaoke sessions. The one-button operation is simple and easy to use, even for people without advanced audio experience, and the DSP processing works quickly without noticeably affecting sound quality. I was impressed by how effectively it maintains clear vocals while reducing squeals and protecting speakers and amplifiers from damage. The multiple connection options make it versatile for different setups, and the all-metal housing gives it a durable, professional feel built for long-term use. Overall, this unit delivers reliable performance, excellent sound improvement, and great value for money for anyone serious about clean, stable audio.

Worth it!

Great sound!