Recent content by Matthew J Poes

  1. Matthew J Poes

    Now this will be interesting if and when it comes out

    Ben I think you underestimate roomgain. We have done a lot of testing of subwoofers outside both here and at Audioholics. James Larson and I combined have tested likely 100+ different home subwoofers outside. We sweep them and test max output. I have also had a pair of contracts to test speaker...
  2. Matthew J Poes

    Now this will be interesting if and when it comes out

    All rooms will act as a pressure vessel at some point. Very tight rooms like basement theaters a pretty well sealed. Especially those with soubdproofing. cars are small. That’s all. Their volume causes the pressure vessel effect to start higher up in frequency. They are stiffer too of course...
  3. Matthew J Poes

    Now this will be interesting if and when it comes out

    Thanks! it probably is ambitious but it was important for me. It’s not too bad to create a floating floor. Plywood isn’t a rigid plate. It can bend. That means that even if the edges were rigidly mounted (which they are not), you still get benefit from the bending. In this case, the walls are...
  4. Matthew J Poes

    How to use acoustic timing reference exactly??

    The timing reference just provides a point of reference for REW to measure the start of the impulse against. I am not really sure why it would matter how far away the timing reference is. Maybe John could speak to how critical that is. not seems odd to me that it would “need” to be the...
  5. Matthew J Poes

    Now this will be interesting if and when it comes out

    I can explain the tests. Basically they test a wall assembly (meaning a mock-up of a wall) to see how much sound passes through it compared to no wall. The difference is the sound transmission loss. This is compared against a standard curve known as the sound transmission curve. This then gives...
  6. Matthew J Poes

    How to use acoustic timing reference exactly??

    As John noted, what you are doing doesn’t sound like it will work. You should sweep a much wider area. If you want to look at a 1khz pure tone, don’t use sweeps. That is a different test. for using timing reference, sometimes DSP devices have muting circuits that cause the timing reference to...
  7. Matthew J Poes

    Outlaw Audio Model 976 7.2 Surround Processor Review

    Worse! Chip shortages made it impossible to continue manufacturing. Unfortunately you will see more of this.
  8. Matthew J Poes

    A Beginners Guide to Room EQ Wizard (REW)

    Those USB measurement mics use prepolarized condenser capsules. So that is a condenser mic. what kind of condenser mic do you have in mind?
  9. Matthew J Poes

    A Beginners Guide to Room EQ Wizard (REW)

    It’s unlikely any modern equipment would need calibration. It is possible but most even cheap interfaces are essentially transparent.
  10. Matthew J Poes

    JTR Noesis 212RT Review and Measurements

    As I understand this is how the M2 is always supplied. They are sold as a studio monitor so should be neutral and without hiss. I think the hiss is just a byproduct of the amp they use being a bit noisy. I believe it’s a known issue. Geddes once explained to me why he believes the Abbey and...
  11. Matthew J Poes

    JTR Noesis 212RT Review and Measurements

    Yes I have, in fact, I've heard them along side the Abbey's before. I also have some measurement data on the Abbey's and M2's. To really compare the measurements of the Abbey's to the M2, you have the eq the response of the Abbey since it was never as flat as the M2 until the active version...
  12. Matthew J Poes

    JTR Noesis 212RT Review and Measurements

    My data is fine, yours makes no sense. Why would the early reflection response and the sound power response (which includes data from 360 degrees) nearly match each other? Our 0-90 degree data looks similar, our DI's look similar, its just the early reflection response that differs and its...
  13. Matthew J Poes

    JTR Noesis 212RT Review and Measurements

    Well my own Abbeys are certainly an expensive and high end speaker. But you can’t buy them anymore. I’m guessing you are looking for comparisons against audiophile speakers of more conventional design using direct radiating drivers and from mainstream brands. with that in mind, the Revel...
  14. Matthew J Poes

    New Guy Questions:

    Geddes calls the placement pseudo-random. It’s placement isn’t critical other than it needs to meet certain criteria. If the subs fall too close together from a wavelength standpoint they coherently couple. If they coherently couple then they are too close to activate modes in a new random...
  15. Matthew J Poes

    EQ Does Improve Bass Decay

    Hah well that’s a new spin. I actually have recently come around to that idea. At least as it pertains to boundary interference effects. ok well sorry for accusing you of anything. I am just frustrated by this thread.
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