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:text-+1: I was thinking of asking for a more b-stock like price (i.e. $200 off). That would make me happy. So far nothing in my listening has indicated anything is wrong. And even if there would be something wrong, wouldn't that be covered by the warranty? 7 years woofer, 2 years electronics...

Towen, The gash/scratch/guage is not deep (at least from what I can tell with my fingers). It seems to barely go under the veneer. I'll try to see if there is any flexing or movement on the panel, but I doubt it. However, I was thinking about the $100. As nice as that is shipping is 139 each...

Well my sub came yesterday! :D But... Some damage occurred during shipping. :( Here's some picks: HSU is offering two options to me. 1) Arrange for FedEx to pick it up at my home and ship a new one, or 2) have $100 refunded to my card. I think HSU willing to give these options is...

Maybe it's time to build those OC703 panels. I have had the OC in the garage for years. I've just been to lazy to buy the wood and build the panels. I even have the cloth and the polyester quilt padding.

What is Impulse? I saw that option in REW, but the graph didn't make any sense to me. Even if using a calibration file to adjust such as the following: 10.0 -22.09 11.2 -19.25 12.5 -16.83 14.0 -14.69 16.0 -12.66 18.0 -10.61 20.0 -9.05 22.4 -7.64 25.0 -6.49 28.0 -5.33 31.5 -4.41 35.5 -3.61 40.0...

Thanks for what the waterfall graphs can help measure. What about the bumping, pointy, comb/step like pattern (even for the faster decays). What does that indicate?

Can the waveform distortion be measured using individual sine waves and THD measurements (i.e. measure with the HSU by itself and compare with both the HSU and SVS running simultaneously)? The REW program does measure THD for 2-9th harmonics. It also give overall THD and THD + Noise. Since I'm...

By the way what is up with the waterfall plot in full range with regards to the higher frequencies. Is that what a comb filter effect is?

What situations would benefit from a lower Q? The reason I ask is that HSU (pete) suggests that I use 0.3 or 0.5, saying that 0.7 may be too deep bass heavy for my room and listening level.

I didn't think about the negative effects of "smearing" the sound. By the way I found the following article (among others) mentioned on AVS forums showing why multiple subs are supposedly "better." http://mehlau.net/audio/multisub_geddes/ I'd like to help the nulls and modes of my room. But...

So you aren't getting any change in response when you change the Q setting? Are the three plots on the graph you post all the same Q? I assume it's showing the physical move of the sub since you spoke of the 100hz null. Could the room acoustics be making any of the response curve modifications...

I'm not quite sure either, but this is what HSU said about the 3 setting combination for my room size (5000+ cubic feet) and volume level (typically -10dBFS for movies): On the VTF-15H I would start with both ports open, operating mode switch set to "EQ2", and Q control set to 0.3. This will...

Well I played with the REW program and the RS Meter as the mic using the correction file for the meter. This is with the 20-39PCi and the two main front speakers. I am curious how the bass graphs will work as I play around with the HSU and SVS seperately as well as combined. Measurements...

Towen, Since you have a 20-39Plus and along with the VTF-15H you would have a similar setup (bass wise) to me. Any plans on running both, or are you just going to use the HSU exclusively? What size is your HT by the way?

REW can do 1/48 octave RTA. Regarding the mic, I meant to plug the RS meter into the laptops mic in port. I know it's not accurate and I can use the correction curves online to somewhat help. I would think it should show if the second sub is helping smooth the peaks and valley though.

I realize it isn't ideal, but would using the RS Meter, a laptop's built in mic in, and Room EQ Wizard be enough to get an idea of what works best. Along with listening with my ears? This approach would not cost anything extra.

Would the SVS help smooth room response if it's running -5dB relative to the HSU? Or does it have to be the same SPL to be of benefit for the nulls and modes? I would probably position it in the front left corner (HSU in the front right).

That's a good idea for the extra oomph as I don't have to worry about level settings. I'll consider that as well.

What about the non identical subs being used to help smooth overall room response? Would this be preferable than using them collocated. If output could be matched, there still would be 3dB gain compared to 6dB collocated. In my cause with the 20-39, The gain would only be 1.2dB. So the only...

I'm not sure I want to sell the SVS at this point, though it is tempting to have extra funds to put towards new main speakers. However, I could always use it with my Audioengine A2 speakers for my home office. That would make PC Gaming quite a bit more fun, improve music and sound quality from...