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What's the volume set to on the SVS app? Also, is the crossover for the subwoofer set on the receiver, the subwoofer, or both? And what is the crossover set to? Comparing the output of the R-121SW (which I'm assuming is a newer version of your sub) with the PB-2000 Pro, we can see noticeably...

Yes, ChatGPT was incorrect. I think these are the facts: LR filters are always even-order, e.g. you can't have a 1st order or 3rd order LR filter. The attentuation at the crossover frequency for all LR filters is -6dB. The attenuation at the crossover frequency for all Butterworth filters is -3dB.

What I meant is that the attentuation at the crossover frequency is -6db only if it's a 2nd order filter, but after looking into this, that might be incorrect. Now I think it's -6dB for all Linkwitz-Riley filters, regardless of the order. I just went off what ChatGPT said in that post. According...

I don't think there's anything that can be done from opening it and inspecting to see what might be the cause, or getting a replacement. I bought it from eBay and the seller is okay with me returning it and issuing a refund, so that's what I'm going to do. I think I'll stick with the WiiM Amp...

That's not always true. Only if it's a second-order filter.

Looks like the LPF filter is a fourth-order filter (24dB per octave)? Does anyone know if the HPF filter is also a fourth-order?

I've done some more testing. There's definitely something wrong with the amp, I'm listening to music and it just stops outputting to the subwoofer at some point. There's no way my subwoofer is going to standby within minutes especially while I'm listening to music and it should be receiving a...

I don't think it's set to auto. The setting in the SVS app for "SUBWOOFER STANDBY" is set to "ON" rather than "Auto" (see attached screenshot) which I'm assuming means it's on all the time. And I haven't had this issue when using the subwoofer with the Bluesound Powernode or WiiM amp, just...

I have a question regarding the subwoofer output graph. The crossover is set at 80Hz but the it's roughly -5dB down at 80Hz, is this expected behaviour? Because I thought that with a low-pass filter, only the frequences above the crossover point should be attenuated. Shouldn't it be flat to 80Hz...

It's not that, it's even happened during the middle of a song where I stopped getting output from the subwoofer.

Hi all, I bought a Fosi ZA3 today but there's something wrong with it. I have my subwoofer connected to it via the subwoofer output on the amp. Sometimes there's sound from the subwoofer and sometimes it stops getting sound. Whenever there isn't any sound coming from the subwoofer, I need to...

The SVS app that you can use with the pro model gives you more precise control in the sense that you can adjust the volume by 1dB increments and you can adjust phase in 1° increments. But your AVR will level match your subs during the Audyssey calibration so each subwoofer gives you the same...

Ideally you want the same subwoofer, but they are close enough in terms of output capability that pairing them is fine. I have paired my old PB-1000 with a PB-1000 Pro. Comparing Brent Butterworth's measurements, there is only a 0.4dB to 1.3dB difference in CEA-2010-A 2m peak SPL, depending on...

My web app which allows you to compare the CEA-2010-A output of subwoofers on @sweetchaos's spreadsheet is now live if anyone is interesting in using it. I have not developed it for mobile devices so it is highly preferable that you use the website on a computer. Here's the link...

@sweetchaos I'm working on a simple web app to compare subwoofers using the data in your spreadsheet. You can select as many subwoofers as you want and it will create a graph to compare the output of the subwoofers and create a table where you can compare the exact SPL values. You can also...