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  1. Pete Mazz

    Birth of a Media Center

    Hi Wayne. Subs sound pretty good but I haven't broken out the measurement gear for tweaking yet. They're pretty close to my old subs location so I'm hoping that they'll measure similarly. Pete
  2. Pete Mazz

    Birth of a Media Center

    My project is winding down. Here's the pics. Just waiting on furniture. Pete
  3. Pete Mazz

    Piano black...which technique?

    I use black lacquer followed by multiple coats/sanding of clear gloss lacquer, followed by a final buff out using polishing compound. Pete
  4. Pete Mazz

    Where to get Maple Laminated Panels?

    Try a local millwork or cabinet shop. Pete
  5. Pete Mazz

    Anybody here using an Avalanche?

    The measurement was taken with only the sub hooked up to a pro amp w/o xover, EQ, or rumble filter involved. My guess on the rising response would be an inductance "hump" similar to the Blueprint drivers. With a typical xover freq it should'nt be a problem. Pete
  6. Pete Mazz

    Anybody here using an Avalanche?

    Blue line is a nearfield measurement of a 180 liter Avalanche 18. Pete
  7. Pete Mazz

    Show off your sub project - Summer Inspiration Thread

    Birth of a Media Center includes my rendition of an IB affectionately called the Soffit Sub. Pete
  8. Pete Mazz

    Anything new in DIY (been away)

    Dave, the HT is in a sunken family room. The master bedroom is directly above. Hmmm...come to think of it, the wife may like a good soundtrack.....:D Jordan, thanks. Using the ganged caps and the overall size of the xover it seemed like the only way to go. Pete
  9. Pete Mazz

    Anything new in DIY (been away)

    Hi Tony. Been wondering where you got to. DIY highlights? Same shit, different dust. :D http://home.comcast.net/~bcwwkg/birt...dia_center.htm http://home.comcast.net/~bcwwkg/m8n_mtms.htm Pete
  10. Pete Mazz

    Couple of M8A questions

    I'm building a set right now for my brother. I'm using the M8ns and the Vifa ring tweeter. If you look in my thread at HTGuide, you'll see my list of caps that I purchased from Madisound. I have some of the smaller values left if you want some. Pete
  11. Pete Mazz

    DIY speaker builders: Why not go active? (long)

    Nice work Mike! I opted for a Marchand XM-9 xover because I am electronically challenged :). I use it on my B&G RD50/Dayton 7" aluminum line arrays with a xover at 500Hz. I have also had to insert 2 passive notch filters to tame a couple resonances but would love to do it actively as well. I...
  12. Pete Mazz

    Need last minute veneer tips for my Pi speakers.

    Yea, I'm not a fan of poly myself. Lacquer is the real deal, but you really need spray equipment to do it right. Glad to hear it worked out OK for you. I always forget about the spray on polys. Pete
  13. Pete Mazz

    Need last minute veneer tips for my Pi speakers.

    Yes, scratches are hard to repair. The poly, when sanded, turns white and it's almost impossible to feather back in. The good news is it's very durable. To fix what you've got, wait till it's completely dry and flat sand with a block. Sand until all the surface is flat again. Wipe down with...
  14. Pete Mazz

    Need last minute veneer tips for my Pi speakers.

    Poly is not very forgiving and tough to touch up. Satin will hide minor imperfections in the veneer. My advice would be wipe it on. Thin the poly with ~10% naptha and use a lint free cloth to wipe on. Apply thin quick coats as it will dry pretty quick. Avoid trying to recoat before it has...
  15. Pete Mazz

    Need last minute veneer tips for my Pi speakers.

    I've never used anywhere near that. 700 lbs/sq ft seems like a lot to me. Pete
  16. Pete Mazz

    Need last minute veneer tips for my Pi speakers.

    It doesn't take a lot of force to have it adhere. Biggest concern is equal pressure and panels that are not exactly flat. To solve both issues, lay a piece of good quality foam carpet padding directly over the veneer and then put a flat panel of MDF or whatever on top of it with the weight on...
  17. Pete Mazz

    Disappointed- went from sealed to ported (Tempest)

    I feel the same way about ported subs, or speakers for that matter. They just don't have that clean sound that I prefer. And by the time you tune really low, you lose a lot of the additional output of the port, so why bother. Pete
  18. Pete Mazz

    Need last minute veneer tips for my Pi speakers.

    Bubbles are usually caused by trapped air or not letting the contact dry enough and trapping the solvent gassing off. Either way, a pinho;e thru the veneer should fix it followed by some pressure with or w/o heat. General tips would be: Use a stipple roller cover made for contact cement...
  19. Pete Mazz

    ETF with Behringer Mic and Shark DSP110

    Were you able to do the initial setup OK? Both I/Os looped thru each other. Disconnect one side and get the appropriate drop in level? Pete
  20. Pete Mazz

    Biscuits in MDF?

    Too much glue in the bisquit slot and it could wind up splitting the MDF. You may also want to allow some extra dry time before final flat sanding to insure you don't wind up with "bisquit sized" depressions from the bisquit/MDF swelling and causing a bulge. If flat sanding is done too early...
  21. Pete Mazz

    Anyone use Titebond III yet?

    My suppliers don't have it yet. I don't think it has the gap filling properties of poly glue tho. Water proof vs water resistance is a plus for some applications, tho. Pete
  22. Pete Mazz

    DIY low freq absorber

    Way better to address the issue of a noisy PC from inside the case. Quieter fans, isolating HDs and anything mechanical, and case damping is the way to go. Unless you know the freqs involved, specific sound absoption info is useless. Basic rules of freq absorption are to put the absorber in a...
  23. Pete Mazz

    Front-firing sub in dedicated media room...

    That size enclosure would be ideal for 2 Tempests in a sealed or ported alignment. Pete
  24. Pete Mazz

    MDF to Baltic Birch-- different blade for cutting?

    The best blade for plywood is probably an ATB (Alternate Top Bevel). It'll produce less tearout on the crossgrain cuts. One foolproof way to get a clean cut is to make one pass with the blade set at ~1/8" deep, then make another pass to cut thru. Flush trim router bits usually make a mess of...
  25. Pete Mazz

    Help with Transmission Line design for Tumult

    I used MJK's Mathcad worksheets. Check it out at Quarter Wavelength Loudspeaker Design. The problem is still line length, tho you can probably model a much more tapered line. It didn't last long. Just an experiment. Sounded fine, but not enough for the huge size. I went low Q sealed, as I...
  26. Pete Mazz

    Will a pinhole sized leak have an effect on a passive radiator subwoofer ?

    Yea, but I use wood putty, but hey, whatever.... :D Pete
  27. Pete Mazz

    Help with Transmission Line design for Tumult

    Yea, they get big! I did this with a Tempest tuned to ~28Hz, IIRC. Line length was like 122". Stood 78" high with the base on it. Pete
  28. Pete Mazz

    Finishing Question: Can I put polyutherane on top of Tung oil?

    I agree that if you really want a poly finish, to just use poly and forget about tung oil and shellac. The finished product will look identical and you'll have a better finished product. Thin the poly down about 10% and use a rag to wipe it on for that hand rubbed finish. Pete
  29. Pete Mazz

    Okay, I need some advice from you DIY sub experts. :)

    Looks like it would take ~500W with the AV15 to break even with the 2 Shivas (assuming sealed enclosures). Of course, the AV15 could handle a lot more power, but at what cost. Pete
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