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  1. Jeff Meininger

    Rubber surround repair: Silicon, RTV, Goop?

    What should I use to repair a torn rubber surround? I've searched the archives here and on other forums, and found pretty much 3 answers. 1. RTV 2. Silicon 3. Goop There is also a 4th answer that sounds like the ideal solution, although I can't find the stuff. The problem is, there...
  2. Jeff Meininger

    Does the PE 250W plate amp have "soft clipping"? Rythmik?

    A while back, I built two AV15 subs using identical alignments. One is powered with a PE 250W plate amp, and the other with a rythmik 350W (380W?) plate amp with the TL072 upgrade. I've noticed that the two amps produce very different results when they clip. Playing the PE amp at levels that...
  3. Jeff Meininger

    HT sub builder seeks car-audio subwoofer advice.

    So far, I've built one shiva sub and two AV15 subs. My friends and family know me as the subwoofer builder dude, and now they're asking me what they should put in their car. Truth be told, I have no idea what to tell them. Basically, I think a Dayton DSQ in a 1 cubic foot box looks best to...
  4. Jeff Meininger

    "Mini-baffle" for port opening on interior side of tube: yeah or nay?

    Would putting a mini-baffle on the INTERIOR opening of the port have any impact on its performance? Here's an example illustration. Hey, stop making fun...I drew it with my mouse!
  5. Jeff Meininger

    Modifying the rumble filter on a PE 250W plate amp 300-794?

    Is it possible / advisable to modify a PE plate amp's rumble filter? I have the model without bass boost, and I want to keep it that way. But as my next sub will be tuned to 20 Hz, I'd kinda like to move the rumble filter up to 20, and perhaps make it 4th order. Too much cone excursion below...
  6. Jeff Meininger

    Anyone have experience with rapid prototyping technology (LOM, SLS, etc.)?

    I think there's demand in the DIY audio crowd for some nice 6" port flares. The Aeroport PNR is too difficult to obtain, and from what I've read has a few drawbacks making it more difficult to work with than it could be. First and foremost, finding the right kind of PVC to mate to the flares...
  7. Jeff Meininger

    H/K AVR-525 issues: can anyone help?

    This forum has been helpful in solving some other H/K 525 issues I've had (see 3 links below) so I figured I'd ask some more questions. #1: I have the well-known problem where the audio drops for 2 to 3 seconds when changing digital modes. I enjoy the sound on THX trailers and little...
  8. Jeff Meininger

    Questions about H/K 525 delay settings (may apply to more H/K units)

    Question #1. My H/K 525 allows me to enter measurement values for Center, Surround, and Surr Back speakers. How in the world can this possibly work if the distance between the main speakers and the listening position is not known? Delay for all channels should be relative to the mains. There's...
  9. Jeff Meininger

    A few questions on my AV15 sub plan. With pretty graphs!

    My plan for the AV15 is 250 liters tuned to 20 Hz. Question 1: I'm trying to decide between two 4-inch flared ports and one straight PVC 6-inch port (no aeroports, no MDF roundover). Any comments one way or the other? I realize that a single 6-inch port has more area than dual 4-inchers, but...
  10. Jeff Meininger

    Can H/K AVR-525 auto-detect between digital and analog audio inputs?

    Just got the HD digital cable box hooked up today. Digital audio for HD content comes in over a digital coax connection, and analog audio for the other channels comes in over the standard red/white RCA connectors. I find that the only way I can get audio in standard TV is to go into the OSD and...
  11. Jeff Meininger

    4-inch and 6-inch porting options

    I'm going to be building an AV-15 sub, and I'm trying to figure out the best way to port it. I've found some good info by searching this forum, but I still need more info. I've read that you can get a pair of Rockford Fosgate 6" flares, and that you need to buy 6" sewer pipe (green) PVC to...
  12. Jeff Meininger

    DIY cooling questions: Volts, ohms, series, parallel.

    I have a rather interesting idea for shutting up the loud fan in my Harman Kardon AVR-525 receiver. I want to use one or two ultra-quiet PC case cooling fans to constantly suck air out of the top of the receiver's case. PC cooling fans are designed to run on 12V DC, but it's popular to run...
  13. Jeff Meininger

    AVR-525 fan kicks on with adequate ventilation and 8 ohm speakers at low SPL levels.

    I used my HK AVR-525 for the first time today. The fan came on a LOT. I'm only using a 5.1 setup at the moment, and all speakers are 8 ohm. I was running at a volume level that my Onkyo SR500 had no problems with. The receiver is out in the open, sitting on a table. It is not particularly hot in...
  14. Jeff Meininger

    Who sells raw drivers? Parts Express, Madisound, and who?

    Aside from PE and Madisound, who sells raw drivers from places like Vifa, Morel, Peerless, etc? (In other words, not Radio Shack.) Thanks!!
  15. Jeff Meininger

    Can you calculate cancellation effects between 2 subs?

    My folks came and visited for Thanksgiving, and again at New Years. Now they want to set up a home theater after seeing how much fun "surround sound" adds to the movie-watching experience. :) They like my EBS Shiva, but don't have quite enough room for 1 big sub. They DO have enough room for two...
  16. Jeff Meininger

    FT: "Falling Down" DVD

    For Trade: "Falling Down" (Michael Douglas) DVD. Disc is in perfect condition. Watched once. The security tape caused some MINOR peeling type damage to the back of the box. Very minor... just flecks of print came off... you can still read all of the text, etc. I'll post a picture later...
  17. Jeff Meininger

    Ugh... Star Wars......

    Bottomed my sub in the 1st chapter of EpII. :) Sheesh. I can't wait to set up a dedicated HT room or at least a better living room layout so I corner load the sub. Right now it's free standing in a 2-story cavern of a living room. Farfield. Poor sub.
  18. Jeff Meininger

    Baffle step compensation, crossovers and overall efficiency, and more...

    Question #1: In a two-way design crossed over at ~2.2 kHz, can all of the baffle step compensation take place below the crossover slope to avoid having to pad the tweeter? I've been trying to model things and understand them, and it seems to me that with a 3rd (or higher) order crossover, you...
  19. Jeff Meininger

    tower speakers and 80 Hz sub crossover: bass management?

    I'm thinking of upgrading my cheezy sattelites (crossed over at 120 Hz) to some floorstanding tower speakers at some point in the future. My Onkyo SR500 receiver allows crossover settings of 80, 100, and 120 Hz. If my towers are -3db at 40 Hz, wouldn't I want a crossover setting of around 60 Hz...
  20. Jeff Meininger

    Mass Technologies MP-17F (MTM w/Vifa D27 and P17)

    I was asking questions about MTM kits on a thread in the "Local Meets" section, and Mark Hayenga suggested a Vifa P17/D25 combo. I started looking for kits or plans using these speakers. I found something close... Mass Technologies has plans titled "MP17-F" for a MTM tower using the 6.5" P17WJ...
  21. Jeff Meininger

    How can I not post yet another "the sonosub is finished!" message?

    At last, it is finished! I know there are about as many of these kinds of threads as there are sonosubs in the world, but I just HAVE to share. Sorry. The EBS shiva is simply fantastic. It sounds great! Just like you read on so many DIY threads, having a good sub reveals tons of material that...
  22. Jeff Meininger

    Shiva cutout diameter... 11 or 11+?

    I don't have my driver yet, but I'm routing the hole today. I know, I know, not the best idea... but I can't be stopped. I'm a routin' fool! I have read that the cutout for the shiva is 11 inches. This is the most prevalent information in the adire docs. I swear I remember reading on some...
  23. Jeff Meininger

    Austin, TX: Anyone want to split some 20-inch sonotube? I found a good deal.

    I found a decent deal on 20-inch sonotube... $69 for a 12-foot section. They're not willing to sell a partial tube, and I don't need anywhere near 12 feet, so I'm hoping to find someone who wants to go in on it with me. Drop me an email if you're interested!! They don't have it in stock right...
  24. Jeff Meininger

    port opening too close to driver/tube wall/endcap?

    I'm trying to design an EBS shiva using 20-inch diameter sonotube. I'm trying to avoid porting out the top because I'd like to have the option of using the sub as a small table. If I have to port out the top, I can always use a "baseplate" on the top, but this adds a good 4 inches to the height...
  25. Jeff Meininger

    Source for 8-inch white speaker grill?

    I'm now seriously considering going ported for my sonosub. I'd have a flared port (FP4) in the top endcap. The top endcap and the flare would be painted white. I want to cover the opening with a perforated metal speaker grill like so many folks here have done, but I can't find a white speaker...
  26. Jeff Meininger

    Dueling crossovers: subwoofer and receiver xo overlap?

    On my receiver, I set my subwoofer crossover at 120 Hz due to my very small main speakers. My current subwoofer has no internal crossover, so the setting is easy. In the next month or two, I'm going to be upgrading to a passive subwoofer for which I'll need an external subwoofer amp. I've...
  27. Jeff Meininger

    Please find the flaws in my sealed shiva sonosub plan before I commit!

    Here's my DIY master-plan. PLEASE find the stupid parts and tell me how I should change them for the better!! My design is for a sealed Shiva in 16-inch diameter sonotube. I'll be using the crossover at 120 Hz. I prefer a tight/clean bass, but I still like my explosions, so I'm going to shoot...
  28. Jeff Meininger

    Sonosub suited for HIGH (100 or 120 Hz) crossover in a HUGE room?

    I have very small main speakers. The crossover is at 100 Hz, which is the low end of what the speakers manual recommends (100 - 120 Hz). With an unlimited budget, I'd just get larger mains, lower the crossover setting, and build a shiva or tempest sonosub for massive, quality bass. I'm quite...
  29. Jeff Meininger

    Crossover @ 120Hz: can 1 subwoofer produce high & low frequencies simultaneously?

    I have small mains. They have frequency response down to 80Hz, but the manual recommends setting the crossover at 100 Hz to 120 Hz. How, then, can one subwoofer driver (even a very high quality one) produce something like 35 Hz while it is also producing 120 Hz? How can it do this without...
  30. Jeff Meininger

    Subwoofer placement in WIDE room... I swear I can hear where the bass is coming from!

    Conventional wisdom on subwoofer placement indicates that humans have a hard time locating bass frequencies, so you can put your sub just about anywhere you like. Not in my case! I swear that I can (easily) hear where the bass is coming from. Maybe it's all in my mind, but I really think I...
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