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  1. GrahamT

    Behringer Feedback Destroyer question

    Good luck Owen, I also have the BFD, Tempest and AVA250 combo. As Sonnie said, you can boost the low end a little. It depends on how much you push the sub. You'll get the hang of it. The Tempest can take a beating too. Have fun with it!
  2. GrahamT

    Am going to try a sealed DIY sub-HELP!

    Hi Eric, I dont think it is worth it to upgrade to an Atlas since you already have the Tempest. Try looking at some of the designs on the Adire Website. I have tried a few and recommend the EBS Tempest. Definitely go ported, IMO. And if you do, there is no need for an LT amp obviously...
  3. GrahamT

    BFD trouble-HELP

    Dont understand ground loop myself but you can get a "cheater plug" or an isolator from Radion Shack to avoid the problem.
  4. GrahamT

    Tweeter replacement cost? (Paradigm Monitor)

    All Paradigm drivers are designed in Canada at the Paradigm Advanced Research Center and ALL Paradigm drivers are made in Toronto. None of the drivers in the Monitor line are made or designed by Vifa. The Monitor V2 tweeters are about $70 CDN to replace, but you can also buy the diaphragm...
  5. GrahamT

    Extremis 6.8 MMT design help

    I appreciate that Dan. I do not recall seeing people bashing your products and apologize if ANY of my own comments have come across that way. I am a DW crew member and have learned a lot from you. :) I just wanted to let people reading this to know that this is Jon's design process for any...
  6. GrahamT

    Extremis 6.8 MMT design help

    I can only comment myself on the low frequency performance of the Extremis which has exceeded my expectations. There may be people out there who want the Extremis to fail, but Jon certainly isn't one of them, and I'm not implying anyone said he was. Just clarifying. The analyzing of this...
  7. GrahamT

    new IB response curve, uncorrected, no EQ

    Hi Rich, The IB looks good. I assume those are some Stryke drivers right? I cant really make out that graph. If you want to you can throw them into this Excel worksheet: http://www.snapbug.ws/subtestmodel.xls
  8. GrahamT

    First time speaker builder

    Well, IMO I think you should stick with one 6.5" You can mix drivers made from different materials, but the more drivers you have, the more complex things get both acoustically and electrically. Butterworths are popular, but the best crossover depends on the application. LR filters are...
  9. GrahamT

    What else can I do with my 2 Blueprint 1804s ?

    And if you can't do and IB or LT maybe an isobaric configuration might work.
  10. GrahamT

    First time speaker builder

    Depends. Two 8s in series as you know will produce a 16 ohm nominal load. This will be perfect for any receiver at low volumes because the current draw is low. The problem is that the maximum power available is now halved. The amp might clip the voltage signal when pushed.
  11. GrahamT

    BFD Comprehensive Setup Guide

    Thanks for the site and the help you have given me Sonnie. It is very appreciated as you could tell from the panic here when it shut down. :)
  12. GrahamT

    First time speaker builder

    Yes, or 16 ohm woofers in parallel of course but these are rarer.
  13. GrahamT

    What type of paint to use on cabinet?

    I used spray on and it turned out nice but it frickin stinks. I would think that the roll on would be better, especially considering the weather.
  14. GrahamT

    First time speaker builder

    We are in the same boat. I am going to start electrical or mechanical engineering in the fall and started learing this stuff for the same reasons as you. The D25 and P17 look like good choices because they have extended smooth frequency response which makes your job easier. I am sure you...
  15. GrahamT

    First time speaker builder

    $200 for drivers is pretty decent. Vifa does have a good reputation and they are very popular. Before you start to buy anything though read a couple of the books. The most important part of a speaker is the crossover, and finding the right drivers to use will help a lot.
  16. GrahamT

    First time speaker builder

    The impedance of the system is always the woofer. The tweeter impedance doesn't matter, it is treated seperately. I highly recommend that you dont try and design your own without measuring equipment. It is best to copy another proven design first and learn the basics. You will learn a lot and...
  17. GrahamT

    First time speaker builder

    My advice is to head to the library and find some loudspeaker design books. Look for books by Vance Dickason, John Murphy and David Weems. I found them helpful. Good luck.
  18. GrahamT

    First DIY: About to Start Adire Alignment Tempest: Need Advice

    Welcome to HTF Wad, You have made a good choice with the Tempest. There are lots of good drivers but the detailed Adire plans make this one a good choice for newbies. I have a room about the same size as yours and with a BFD my Tempest is flat to 16 Hz. 1. You should be fine with a sub...
  19. GrahamT

    Im seeking info about box building

    www.diysubwoofers.org This site has definitions of the T/S specs aswell as examples of different alignments. Also, your library should have some good design books by Vance Dickason, John L Murphy and David B Weems. Good luck.
  20. GrahamT

    Are large underhung designs superior ro xbl^2?

    Isn't that a huge plus? Say you have a underhung with 25mm Xmax (like the beehive) and a flat BL curve over that excursion. You could probably still make a XBL^2 driver with a flat BL curve over the same distance, but much more Xmax and it would still probably cost less. I haven't seen your...
  21. GrahamT

    Are large underhung designs superior ro xbl^2?

    Good point Thomas. They come across as bombastic and I dont like the cut of their jib, but maybe that's just me. With statements like "they would literally tear a car apart." that is obviously not true for one, and they obviously meant that figuratively, not literally. I have read other...
  22. GrahamT

    Paradigm Center Speaker cc370 problem

    Just an FYI, the buzzing on the V3 monitors is caused by the diaphragm plate vibrating against the faceplate. I have taken 2 V3 speakers in to get replaced and the noise eventually came back. I have had it happen to 2 cc370s and a mini. I took them apart carefully and put lube between all the...
  23. GrahamT

    I'm going to build them, but I need some advice

    You cant go wrong with Solen Fast Caps and Heptalitz inductors and it looks like that design calls for ceramic wire wound resistors. A good book for schematics would be the Loudspeaker Design Cookbook by Vance Dickason. I dont know of any online resources for tips on soldering, schematics etc...
  24. GrahamT

    I'm going to build them, but I need some advice

    The Koda 8 wont work because it is 4 Ohms and lacks the high end extension of the AV8. The Extremis would be a better choice for a replacement for the AV8 and Adire should have plans for this driver coming out in the next few weeks, but not likely any near field designs. You can get parts...
  25. GrahamT

    Paradigm Center Speaker cc370 problem

    The tweeter is $70 CDN and probably about the same in US dollars.
  26. GrahamT

    Should I do EBS w/ plate amp? *rumble filter*

    Yes bring friends, you will need 4-6 people to lift it straight up because it is akward. If you make the sub out of BB ply it will save some weight. Ever tried to pick up a 4X8 sheet of 3/4" MDF? Damn Heavy. I used two full sheets and then add 30 pounds for the driver and amp. Make the legs...
  27. GrahamT

    Should I do EBS w/ plate amp? *rumble filter*

    I drive it to about 110 dB peaks during movies but I have gotten over 120 at the listening position. At the deep frequencies there is no chuffing at all, and I hate chuffing. What is noticeable is that the driver reaches it's limits at about 30 Hz I guess. I haven't bottomed it but you can...
  28. GrahamT

    Should I do EBS w/ plate amp? *rumble filter*

    Since I have built two EBS's maybe I can help. There is NO port noise at all with this design, that is why I chose it. Personally, I would be worried about chuffing (because of the edges) with the straight port but I haven't tried a 6". It will fit in the same location and probably has the same...
  29. GrahamT

    Veneer - wood glue/ironing method

    I have had excellent luck with wood glue and veneer. I pour some glue on the wood and the box and then scrape most of it off with a auto body plastic scraper thingy. I let it get tacky, then iron it on. I haven't had any bubbling or cracking peeling etc. The only other way to do the recess...
  30. GrahamT

    Should I do EBS w/ plate amp? *rumble filter*

    I dont know for sure. My sub is about the same volume at 20 as it is at 70-100 Hz. From 30 to 70 it is a mess because of room problems(pre EQ). If you get the BFD you can add EQ to the bottom end on the Tempest. The sub is very efficient. I found that modelling in LSPcad came pretty close...
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