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RE: My new Maggie .7s and my SVS SB-1000 sub.... not too great

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In Reply to: RE: My new Maggie .7s and my SVS SB-1000 sub.... not too great posted by Rodcarew29 on May 05, 2016 at 12:33:47

The sound problem is completely resolved with the SVS 1000 dialed in properly at 50 HZ and having the Maggies 5 ft off the wall. I am not completely satisfied with the SVS sound. It just doesn't compare to what's coming out of the .7s.
Here's my question: Would it be better to replace the SVS with a significantly better single sub or get another SVS 1000 and have the two?
I happen to have a Outlaw M8. Here are the specs:
Driver Type: Down Firing, 8" Long-throw Woofer
Ports: One, down firing
Amplifier Power Rating: 125W RMS class AB
Frequency Response:
29Hz-250Hz +/-3dB
Crossover:
Lowpass : 40Hz to 220Hz
Phase: 0 or 180 Degrees
I will try it out, The Mod Squad preamp has two RCA outputs. One goes to the amp and the other goes to the SVS. How can I get another sub on board.
What kind of splitter would get two subs connected to one rca output?
Thanks
Adam

Edits: 05/08/16

Follow Ups:

RE: My new Maggie .7s and my SVS SB-1000 sub.... not too great - Satie 04:55:16 05/09/16 (5)
The second sub gets one channel and the original sub gets the other channel from the pre out. So you have one channel for each subwoofer so you divide the load and reduce the dominance of the room nodes from one sub.

The way you have it setup you are running the main speakers full range. Which is what you want to do unless you are straining the speakers at higher volumes, in which case you may want to consider running the signal through a high pass filter between the preamp and the power amp to reduce the load on both amp and speaker.
- RE: My new Maggie .7s and my SVS SB-1000 sub.... not too great - pictureguy 00:39:56 05/11/16 (4)
  The OTHER advantage of low cutting the mains is that Maggies give up fairly early.
  
  THAT was part of my solution to a similar problem. When I set the crossovers about 10hz apart, with the mains being higher, ALL the mushy problems thru the bandpass went away. Now, it would appear to 'sum flat' thru the crossover.
  Too much is never enough
  - RE: My new Maggie .7s and my SVS SB-1000 sub.... not too great - cfraser 13:28:32 05/11/16 (3)
    I would have to agree about the HPF, it is very worthwhile to keep the lowest stuff out of (especially) the Maggies. Measure and you will see absolutely why. Listen after the HPF install and all becomes "clear" in several ways.
    The low freqs suck power from the amps. So not doing that is an advantage to the amps. The Maggies don't handle the lowest freqs graciously, so not subjecting them to that is a sonic and perhaps even a life-extending courtesy.
    The HPF does not have to be at all sophisticated to do a noticeable job, but quality does matter of course, since all your music will be going through it. Compromises...you just want to make the upside a lot better than the downside.
    Better two smaller subs than one large one (for the same overall $$, say), for smoothness of response. Very "nodey" with just one, but that may not matter so much in reality, for a single listener.
    Another option is to use one large high-powered sub as the "pressurizer/driver" for the LFs, and another smaller lower-powered one (like the SB-1000) as the "smoother". That's what I do, it works just fine. It didn't seem good on paper, and I was reluctant, but the reality was completely different than my thoughts... Edit: the two subs should be opposite each other in the room, diagonally or on opposing walls, for this method to work best.
    
    Edits: 05/11/16
    - RE: My new Maggie .7s and my SVS SB-1000 sub.... not too great - pictureguy 14:26:13 05/11/16 (2)
      Below a certain $$ point, a SINGLE well placed sub makes more sense than multiples. Only YOU can decide where that point may be.
      When I bought MY sub, I had but 500$ to spend. In the HSU line? Maybe a pair of the entry subs would have worked but NOT with the low extension I wanted for movies. And room size also makes a big difference. A HUGE room (in CUBIC FEET) will require and benefit from both more robust and simply MORE subs.
      
      I go with the ESP article on music power / biamping. The 50:50 power point is about 350hz. By cutting off the below 50 or 60hz TO my panels, I don't save THAT MUCH power, certainly not much more if even 10%. What DOES pay off is that you now have less or NO duplication between sub and mains. With my sub crossover at 40hz / 24db-oct and the preamp set at 50hz or so with a 12db-oct, I have very little duplication.
      This helped SO MUCH that it was like buying a new sub.
      
      My room is 8 sided (no joke) and has a ceiling peaked about about 11 feet well off-center!. With my sub in the LH corner behind that speaker, my DEN was a bigtime helmholtz and was like being in a single-tone 55 gallon drum. Moving the sub to the RH speaker, which is not in a corner fixed that problem immediately.
      
      I believe making some diffusion for behind the panels will help a lot, also. But that's another chat for another time.
      
      Next step? MiniDSP. The 2x8 seems best for my needs and I can case it and have a bracket made to support all the balanced connections. It comes with Phoenix connectors.
      Too much is never enough
      - RE: My new Maggie .7s and my SVS SB-1000 sub.... not too great - cfraser 14:48:55 05/11/16 (1)
        
        In Reply to: RE: My new Maggie .7s and my SVS SB-1000 sub.... not too great posted by pictureguy on May 11, 2016 at 14:26:13
        
        Sorry,I responded to you and meant to respond "in general"...gotta watch where my reading ends and my typing starts...
        
        I stand by that no single sub can match what two of the same sub will do, or even with two "slightly lesser" subs can do compared to one of them. No way one will match, physics isn't changed by preference. I insist on measuring, the human ear is very poor at judging sub performance, or with very low frequencies in general. We use that to our advantage with subs.
        
        As for the miniDSP: I do use some of their stuff. It is pretty good, but I will not use it for some stuff as long as the processing is done at 48kHz. I realize this is common for much "audio DSP" stuff, and I put up with it for now, but I am unwilling to use it in my "analog" system (it uses the subs too).
        
        I do admit that it doesn't matter for bass and LFE, and also not as much (for me) for HT, but the prob is *all* the audio has to pass through the digital filter on the way to providing the bass. Good analog filters can cost a fair bit and are not within a couple magnitudes of the flexibility of the miniDSP units. Again, compromises...
        
        RE: My new Maggie .7s and my SVS SB-1000 sub.... not too great - pictureguy 15:12:13 05/11/16 (0)
        
        In Reply to: RE: My new Maggie .7s and my SVS SB-1000 sub.... not too great posted by cfraser on May 11, 2016 at 14:48:55
        
        Yes, Certainly. Audio is replete with Rules Of Thumb. Guesstimates. A Bunch of Always / Never and more than a few opinions!
        
        On ANY issue you'll have 2 crowds across from one another in the stands of a basketball court.
        The court? No Mans Land and an absolute minefield. The participants yell across at one another in various shades of insult, suggestion and interpretive fact.
        
        When I bought my original sub, I thought briefly about budget and just WHAT I could get without busting out. A single HSU Research in the VTF-2 line. I drove to the offices / warehouse and bought one for CASH, saving 10% and NO SHIPPING.
        As it turns out? I have only SO MUCH space and 2 subs might not have fit. The LH corner is awful and no center space due to TV / Cabinet. Behind the RH speaker is IT for location. So, I guess it worked out.
        Too much is never enough

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