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Post by allenellis on Feb 11, 2018 10:29:37 GMT -7
Hi all, I tried doing some searches here but couldn't find any comparisons. I've been dreaming of building an IB setup for over a year, but my current house isn't particularly conducive to one, so I'm considering just purchasing an SVS PB16-Ultra instead. I'd like to know how much sound quality I'd be missing out on by doing that.People who have infinite baffles, and people who have left reviews for the PB16 describe an overpowering, chest rattling experience "unlike anything they've felt before", "way better than imax". I've never experienced this and would love to! I've seen references to IB setups that can get down to 10hz, whereas SVS rates this model at down to 13hz depending on configuration. Beyond that metric I'm not sure how else to best compare them. My space is small enough that I imagine one of these will have more than enough power, and I can't justify $5k to buy a second just to even out the frequency response. Any insight would be much appreciated! If you're curious, details about my space are below: My rough floorplanThis is inside my basement, every wall here is exterior & underground. Photos of the space are available hereBecause it's all an open floor plan, an infinite baffle would require me to either: The third option I considered was cheating with heavy acoustical curtains to use instead of a real wall. Would I be satisfied with an infinite baffle if the only acoustical separation were some heavy curtains? Thanks!
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Post by ThomasW on Feb 11, 2018 19:25:56 GMT -7
Hi,
It's pretty simple, sound 'quality' is a function of how little distortion is present in the sound.
With IB subs we use multiple drivers so the workload on each driver is very low, that equals low distortion and correspondingly high sound quality. When there is a single driver (like any 'box' sub) distortion is higher because a single driver is being asked to do all the work.
Now can you come close the the SQ of an IB with multiple box subs? Sure but $10K for the SVS boxes might be a little steep. Can you build something equal to the SVS for a fraction the price? Sure box subs are the easiest speakers in the world to build.
No you can't use curtains instead of a wall. The front and rear waves off the IB need to be separated by a rigid membrane (aka wall)
HTH Thomas
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Post by allenellis on Feb 11, 2018 21:33:30 GMT -7
Thanks for your quick reply Thomas! I'll ask my contractor if he has any good ideas for getting some kind of rigid wall in place at a reasonable cost.
Fortunately this particular box sub seems to be praised for very little / no distortion, and since my listening space is smaller than average hopefully I'd be even less susceptible to distortion as I should be able to run the entire system relatively low.
So if those are the primary metrics to consider in a system's perceived performance (frequency response, distortion, consistency between listening positions) then it seems to be like these options and costs are likely pretty similar (factoring in the cost for a wall).
Cheers!
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Post by ThomasW on Feb 12, 2018 8:25:47 GMT -7
Some additional thoughts....
RE SVS I see no distortions measurements, just references to it being 'cleans'. That's meaningless without facts.
The 'app', interesting but I dialed in my big IB 20yrs ago and haven't changed the settings sense. Why anyone would need an app for a sub is beyond me.
A smart shopping DIYer with access to a power saw and hand tools could reproduce the SVS box, driver and amp for $1200 or so...
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Post by allenellis on Feb 13, 2018 17:45:59 GMT -7
Thanks Thomas. I've just got to factor in the price of a wall next. Do you think some rigid foam would be a sufficient barrier for certain areas where it's particularly difficult to install drywall (for example, around HVAC ducts, plumbing lines, etc)
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Post by ThomasW on Feb 13, 2018 21:52:44 GMT -7
Small openings a sq ft or less don't matter. Don't really see why the ducting would be a big framing problem.
No foam won't do what needs to be done.
The rearwave can be blocked with a thick rubber membrane (think used conveyor belt material) Problem is it would be more expensive and more labor intensive to install than sheet rock
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