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  1. Dave Upton

    Podcast HomeTheaterUnited Podcast Episode 15 - Dave Upton on room correction and calibration with REW and Audyssey

    One of the main reasons for dual subs is to combat room modes and nulls. By colocating the subs, you are giving up that advantage for any axial modes. So for that reason, I strongly recommend placing them in different spots in the room. Dr. Toole did some great research on this and found the...
  2. Dave Upton

    Podcast HomeTheaterUnited Podcast Episode 15 - Dave Upton on room correction and calibration with REW and Audyssey

    They're all great options. SVS is way ahead in terms of tech - their app lets you adjust all the sub settings via bluetooth which is incredibly nice. I think Rythmik probably has SVS beat in terms of pure sound quality for music (lower overall distortion between 30Hz-100Hz), and their servo...
  3. Dave Upton

    Podcast HomeTheaterUnited Podcast Episode 15 - Dave Upton on room correction and calibration with REW and Audyssey

    Just remember that even with a single "sweet spot" 2 subs can often achieve a better response. That will very much depend on your room. If you can get a single sub to measure relatively flat at your LP without tremendous effort or crazy placement, you definitely would be best served by getting a...
  4. Dave Upton

    Podcast HomeTheaterUnited Podcast Episode 15 - Dave Upton on room correction and calibration with REW and Audyssey

    Well put. The most important thing to consider about ported subs is really what you listen to. Generally speaking, music listeners will prefer the character of a sealed sub, and theater/TV content watchers will be happy with either. Both designs have their trade-offs. The group-delay of a...
  5. Dave Upton

    Podcast HomeTheaterUnited Podcast Episode 15 - Dave Upton on room correction and calibration with REW and Audyssey

    The other thing about REW, is that it has a ton of "hidden" features also. Reading the help is a bit boring, but I've found some really cool stuff that way, like wavelet visualizations.
  6. Dave Upton

    Podcast HomeTheaterUnited Podcast Episode 15 - Dave Upton on room correction and calibration with REW and Audyssey

    So these sweeps are mains + subs? Have you taken sweeps with the subs off and the speakers running full-range?
  7. Dave Upton

    Podcast HomeTheaterUnited Podcast Episode 15 - Dave Upton on room correction and calibration with REW and Audyssey

    Actually John this is very possible with room gain. Especially if the sub is corner loaded.
  8. Dave Upton

    Podcast HomeTheaterUnited Podcast Episode 15 - Dave Upton on room correction and calibration with REW and Audyssey

    Questions that spring to mind: What is your LPF of LFE set to in your AVR? Do you have a lowpass filter set on the SVS? Make sure Audyssey is off for your measurements - that is absolutely essential.
  9. Dave Upton

    Podcast HomeTheaterUnited Podcast Episode 15 - Dave Upton on room correction and calibration with REW and Audyssey

    I also don’t want to sell Dirac short - it’s a fantastic system. I just find the number of available processors with Dirac is still a bit small and there are other trade offs. Since they added DLBC (Dirac Live Bass Control) they are definitely a much improved solution and I plan to review it...
  10. Dave Upton

    Podcast HomeTheaterUnited Podcast Episode 15 - Dave Upton on room correction and calibration with REW and Audyssey

    Yes, this is the starting point which I meant to link: Once you have watched that, you can watch the first few videos in the playlist I linked
  11. Dave Upton

    Podcast HomeTheaterUnited Podcast Episode 15 - Dave Upton on room correction and calibration with REW and Audyssey

    You should look into Roon in that case. It’s a game changer for enjoying audio
  12. Dave Upton

    Podcast HomeTheaterUnited Podcast Episode 15 - Dave Upton on room correction and calibration with REW and Audyssey

    Yeah, I use my HTPC to run REW and other calibration software. You are correct that you'll need the MIniDSP 2x4 HD. This is the specific video guide that walks you through the process of sub EQ - it's very comprehensive:
  13. Dave Upton

    Podcast HomeTheaterUnited Podcast Episode 15 - Dave Upton on room correction and calibration with REW and Audyssey

    The good news is you can run REW on any computer - so at least it's not picky. Regarding microphones, I generally also recommend the UMIK-1 or newer UMIK-2, but there are a few other good options like the Dayton UMM-6 or a calibrated mic from Cross Spectrum Labs. Here's the Dayton...
  14. Dave Upton

    Podcast HomeTheaterUnited Podcast Episode 15 - Dave Upton on room correction and calibration with REW and Audyssey

    Generally speaking, perceived brightness is not only the result of an acoustic problem. It is a problem that starts with the way your system is put together and the actual components of said system, followed by the placement of your speakers and listening position, and finally amplified or tamed...
  15. Dave Upton

    Podcast HomeTheaterUnited Podcast Episode 15 - Dave Upton on room correction and calibration with REW and Audyssey

    I referenced a few different resources in the show. Here they are: Show notes: Youtube videos showing room setup, REW, calibration: https://www.youtube.com/channel/UCwxr5jJUgORcMS9FmIaH1jQ/videos?view=0&sort=da&flow=grid Cheap acoustic panels: https://www.acoustimac.com/acoustic-panels...
  16. Dave Upton

    Podcast HomeTheaterUnited Podcast Episode 15 - Dave Upton on room correction and calibration with REW and Audyssey

    The egg crate type foams are just not as effective as other products. If you look at test results, you’ll see they’re most effective in the 3-400Hz range and up. They’ll do next to nothing for bass. Bass traps generally have to be at least 4” thick, ideally 6 or more . Here are some examples...
  17. Dave Upton

    Podcast HomeTheaterUnited Podcast Episode 15 - Dave Upton on room correction and calibration with REW and Audyssey

    This is your best bet: https://www.minidsp.com/products/acoustic-measurement/umik-1
  18. Dave Upton

    Podcast HomeTheaterUnited Podcast Episode 15 - Dave Upton on room correction and calibration with REW and Audyssey

    The AVM60 does have the latest version of ARC Genesis, but doesn't support EQ'ing/time aligning subs independent of one another. That's what I did with the MiniDSP, which presents a single "logical" time-aligned and pre-EQ'ed subwoofer to the AVM60.
  19. Dave Upton

    Podcast HomeTheaterUnited Podcast Episode 15 - Dave Upton on room correction and calibration with REW and Audyssey

    I prefer sealed subs personally, and think it would be a great option. Once you go to dual subs or more, output is never the issue - but the advantage in terms of EQ is massive. Even a pair of SB-2000's would be excellent options. I do prefer 15's over 12's because they extend deeper and you...
  20. Dave Upton

    Podcast HomeTheaterUnited Podcast Episode 15 - Dave Upton on room correction and calibration with REW and Audyssey

    Audyssey is really, really stupid. What is is looking at is likely a massive peak due to room gain. There are two ways to work around this. 1) What I will typically do to defeat Audyssey's stupidity is pre-EQ the sub using a miniDSP device - which can be had cheaply. This takes about 15 minutes...
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