CLEANBox Pro Dual Channel Level Converter

I was dealing with a frustrating audio issue where my signal levels didn’t match and I was getting unwanted noise and distortion when connecting my equipment. No amount of gain adjustment fixed it—the signal was either too weak or noisy. The ART CLEANBox Pro completely solved the problem. As soon as I installed it, the signal was clean, properly leveled, and free of hum and distortion. The dual-channel design is perfect for stereo setups, and the level controls make it easy to dial everything in exactly where it needs to be. This unit does exactly what it’s supposed to do: converts signal levels cleanly and reliably. Solid build, simple setup, and immediate results. If you’re struggling with mismatched audio levels or noise in your system, this is the fix. Highly recommended.

Great converter, works perfectly. I'm using it for subs that I'm running through a couple of Crown XLS-1000s (1,100 watts at 4 ohms in bridged mono, baby). I haven't noticed any noise (hard to hear with subs, but even so), and the controls are simple and easy to understand. Being able to adjust the line level to match my other gear while leaving the gain alone on the amps has been great. It's built like a tank (this thing would survive on the road with real pro gear, I'm confident). It is a reasonable value for something made this nicely and looks pretty decent. It certainly doesn't have the aesthetic appeal of vintage brushed aluminum gear, but it's not the ugliest thing I've seen in a stereo setup. Overall, I hope I don't have to buy another one, but I'm glad I got this one.

A device intended to increase the voltage of a pre-out from your receiver. I can't think of a better use for this than to hook up a Pro AMP with a consumer HT Receiver for subwoofer use. Why? That Pro AMP will want a higher level of voltage before it will decide to do anything with it and your HT Receiver doesn't provide a good amount of voltage on the LFE Pre-Outs without running it super hot. Why don't you want to run the pre-outs at max? Well a few things can happen; 1 - can cause artifacts in the signal which can affect the sound, 2 - lower the lifespan of the pre-out and 3 - not be enough to drive the external AMP to max power. (#3 is the most important) Why use a Pro AMP? Cheap power for great performance AND most give you DSP (Hooray!). Now, consider this, DSP (Digital Signal Processing) IS important and these don't provide that but there are products that will provide signal boost and DSP capabilities. They are more expensive but at the same time a better solution than going Boosted Signal -> AMP w/DSP. For an introductory to setting up your HT, going with a CLEANBox Pro -> Pro AMP w/DSP is probably safer, easier and cheaper, maybe just not the best approach. Been using mine for almost 2 years now, honestly I forgot I had it till the other day when I had to move it. My major qualm is the form factor, I know car use was a consideration so smaller sizes are important but for HT use the size is somewhat a pain on initial set up. After that though its fine, still wish I could get it in a bigger box style. The uses for the CLEANBoxPro has been restated many times, figured I'd put in mine! Would I buy again? no, but that's not against the product itself, I just want something with DSP so I can put a bunch of power amps after it.

Made a huge difference!!! Works great !! Changing the unbalanced audio from my av receiver preouts into balanced audio going into a qsc 1450 powering a pair of 3 way 18inch pa speakers! Highly recommend!!

I bought this to connect an old AC3 decoder to my EV ZLX-15BT PA speakers. Right now I only have one but I plan to buy 2 more. The AC3 decoder has RCA outputs (6 of them, since AC3 is a protocol to carry surround sound). To get the best sound quality, I decided to try this since it is active and converts the unbalanced signal to a true balanced signal over standard XLR outputs. This gives the benefits that 1) I don't have to worry about the length of the cable from the CLEANBox and 2) since it is a dual channel converter, I can convert the front and rear signals together with one box (for each set of channels). The audio quality is great, and since I have an EV ELX200-18SP subwoofer I can attest that the CLEANBox does not affect the bass with any highpass filters and the midrange and treble come through clear and crisp. The only thing is, while the level knobs are silky and smooth, there is an imbalance in channel 1 and channel 2 volume that is quite noticeable at low levels. So if you have a hot signal and you don't need a high level output, the level knob will cause an imbalance between your stereo channels. Also, while CLEANBox is very rugged with a metal chassis and decent quality connectors, the power supply is nothing special and I think the price is a bit too high, so I'm knocking off a star.

Excellent product. Great value for balanced to unbalanced audio connects.

Ideal solution to match the RCA output of my consumer Receiver to the pro XLR input of my studio gear. Built like a tank, but fits in a tight space. Works well with -ZERO- noise.

I was wondering why my bridged amp was sounding like it had zero power. After looking this product up I understood I was not receiving the maximum wattage my amp was putting out because it was not receiving the correct max input! No I have to turn the volume down and have the correct dynamic range for my system! It sounds wonderful now. Low distortion, open sound stage, and wonderful dynamic range! Get it, you will not be disappointed!

Estava meio cético quanto ao funcionamento e se iria realmente anular os ruidos em volume alto. Me surpriendi pois alem de eliminar totalmente o ruido, deixou o sinal bem mais alto e melhorou muito a dinamica da música, oque não acontecia antes, mesmo com o volume bem alto. Você não precisa gastar varios dolares a mais para resolver seu problema de estrutura de ganho. Este produto ja resolve, com um preço dentro da realidade.

... aber was ist es überhaupt? Was könnte das Gerät noch? Ich hatte ein Gerät gesucht, mit dem ich Sound (vom Rechner) auf meinen digitalen Recorder aufnehmen kann. Unbalanced > Balanced. Die einschlägigen Websites empfinde ich als unseriös. Das Aufnehmen funktioniert prima - ich bin sehr zufrieden! Keine Nebengeräusche oder Brummen. Aber ansonsten ... muss ich mich in die weiteren Fähigkeiten leider noch einarbeiten.

Before buying this little box of tricks I had a big problem with hum and distortion. I was tying to connect my home cinema amp to a Behringer inuke 3000 power amp. But the power amp lacked an RCA input and the cinema amp lacked a balanced output. So I used a phono to 1/4" jack plug . This just made a load of hum through the subwoofers. So after reading other peoples reviews I bought the Art cleanbox. And wow what a little box of tricks it is. No more hum and I mean none, and the correct signal level now going into the power amp.

Great, glad I purchased. Woke up my sub/amp

It did exactly what the literature said it would do