BDS PP-131 Green Audio Spectrum Analyzer Display 2U Rack Music Spectrum Indicator VU Meter 31CH Real Time Frequency Level Display

I installed the unit last night. there's more settings to optimize than you'd expect, but glad it's made this way so one can configure it to suit their preferences. I ended up connecting to the receiver's adapter out jacks since I was using the Tape Play jacks for the input of other components to the receiver and did not want to risk they would interfere with the Tape Rec out jacks I would have had to use instead. The peak hold time and main fall time adjustments of the analyzer make the most pronounced differences in the visual display behavior. With the settings provided you can create many drastically different visual displays. You will definitely not feel restricted on the numerous choices. I was thrilled that the rack attachment brackets are optional and leaving them off makes the unit about 2 inches narrower and look much better when not using a rack. It would not have fit into the ideal location for it in my cabinet had those rack ears been fixed to the unit. I'm 100% satisfied with the unit now that I have it dialed in. If you've been considering adding dancing lights to your system I highly recommend this unit.

Love this!

Nice to see the music being played.

Works but the gain in it is so poor I had to return it.

I was a little worried that it would change the sound , fortunately it didn’t, great addition to my system , thanks

In my opinion, this item shouldn't cost more that $60 dollars,... esp. $100 dollars! Look, it works.... However,.. for my particular installation I'm unable to use it comfortably considering the amount I paid. That's why I sent it back. I liked it for the height of the amount of visual graphic that you see. The only thing is I'd have to turn the volume up to uncomfortable listening levels for it to 'work' or 'um,... display the rise and fall of the graphic. I tried to overcome this by placing a small amp (Fosi Audio BL20A) between my Emotiva TA2 and this item. It somewhat made the signal a little hotter so that I could turn the volume dial to 38 instead of 50 (out of 80) for the graphics to display. But this too was still unsatisfactory for me as it was too loud for casual listening. With a different set-up I could get it to work the way I want but I don't want a 4-unit tall rack on top of my entertainment center as well as my integrated amp. Overall, hey it works but I couldn't justify the crazy price of over $400 dollars for this item esp. after finding it on Alie Express for a little over $200 which is still too expensive in my opinion..... just think about it?!

Very nice

Input is from my 31 band EQ, and the output goes to a line converter and then to an unbalanced amp input. I’m using this with balanced connections and I hear no noise introduced by the device which is good. The LED display seemed to flicker a bit for the first several minutes of use, and haven’t really seen it since. It is very accurate. You might not think so at first glance, testing with a tone generator. The default setting is “smooth” which activates the frequency indicators adjacent to the one that is actually playing. Switching to “real” turns this off. Visually I do sort of prefer the smooth setting. I primarily got this to monitor for clipping so I could see which frequencies were responsible, and modify my EQ settings accordingly. Using my EQ I was able to set the clip point accurately. The one gripe I would have about this SA is that the sensitivity dial adjusts a set range of amplitude measurement up and down. So basically you adjust the min and max at the same time. So if you’re listening to very dynamic music with the clipping point set correctly, the SA may not display anything for awhile, even during what I would consider not-so-quiet portions of the music. I would much prefer to be able to set the min/max points separately. There is a switch on the back the can “compress” the amplitude displayed allowing you to adjust it to be able to see more of the frequency activity, but then it will not display clipping — completely defeating the purpose of the device for me. Overall, I would say if you feel like you need it for what I did, then perhaps it’s worth it. If it’s just for a light show, it’s way too expensive. If the mfg would make the one change I suggest, it would be a completely stellar product.