ART CLEANBox Pro Dual Channel Level Converter (CLEANBOXPRO)

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!

I'm using this unlike most people; I have some powered loudspeakers that use xlr cables and I wanted to connect them to my receiver. This is the product I found that works great for what I am doing. It took a little fine tuning but for $80ish this works great!

Ok so I have been having issues making my Crown XLS1502 amp work with a Yanaha AV home reciever. It has rca output for subwoofer and it's just too weak of a signal for the Crown amp, even when switched to high sensitivity mode. So I got this Clean Box Pro. It's takes that rca in and converts it to a balanced xlr output for the crown. Sure I have the gains cranked but I need to because the incoming signal is that weak.

I needed this unit to resolve an issue with a long cable run of around 30 feet that was picking up hum and interference along the way: I was feeding the left and right channels audio output of an OPPO 205 blu-ray player to the inputs of a Marantz preamp. Unfortunately, the Marantz tube-based preamp does not have balanced inputs, only unbalanced RCA level inputs, so I couldn't take advantage of the OPPO's balanced outputs. And unfortunately, I had to place the Marantz far from the OPPO. Using the unbalanced outputs of the OPPO and the long cable run resulted in picking up significant hum from other cables running parallel to the unbalanced RCA cable between the OPPO and the Marantz. One obvious solution was to place both components in close proximity to avoid the long cable run altogether, but unfortunately that is not possible. The ART CLEANBoxPro solved the problem completely: I ran a pair of shielded mic cables from the balanced outputs on the OPPO player into the ART CLEANBoxPro positioned right at the Marantz preamp then used the unbalanced output on the ART to feed into the Marantz's unbalanced RCA inputs - it completely cleared up the hum and interference issues. Problem solved. However, be aware that the ART inserts a significant thump when powered on so you may want to turn it on first before any power amps are turned on to avoid the thump, and reverse the turn off procedure when turning the equipment off. Other than that issue, the ART is an excellent tool to solve a particular problem.

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.

The clean box pro works wonderfully to allow you to step up the voltage to allow pro audio amps to run off consumer receivers. Without it, it was nearly impossible to get the amplifier loud enough, despite having the gain nearly all the way up. Once in place, the gain and voltage could be adjusted together to make everything play well together.

Works great

I was a little hesitant about this purchase. I was using RCA > XLR cables to connect my AVR to my Crown XLS2502 powering my LR Axiom M60s. It sounded "good", but I was never blown away by the quality. My main criticism was the amount of noise put out by my amp. The longer I listened the more aware of the noise I became. It was especially audible when listening at night after the fam was asleep when I had to keep the volume down. So, failing to just "live with it" any longer I decided to roll the dice and purchased the ART box and a pair of good XLR cables. After installing and spending about 10 minutes adjusting the gains I must say that it has made a huge difference. The noise is virtually non-existent, barely audible even when I have my ear pressed against the tweeter. I can listen with the volume much higher with less distortion. Overall, the quality is noticably improved with increased detail.