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I've been away from the boards for a while - enjoying my theater rather than tinkering with it (blasphemy!) My latest project is a pair of speakers for my dad. His is a two-channel only system and he'd prefer not to have a subwoofer. So I'm looking for some slim floorstanders with decent...

Just wondering if any of you have found the best performance/price for these 12V halogen reflector bulbs. Since prices locally range from $6 to $10 per bulb, I've been shopping on the Internet. But I got a batch of "Sylvania Tru-aim" BABs (20w wide flood) and their light had a definite...

Hey DIY-ers... Anyone used the Dayton 1-1/8 silk dome tweeters that are popular at Parts Express (pn 275-075)? I'm thinking of making some medium-priced MTMs (say, up to $300 for parts) and remembered that I had won the tweeters as a door prize at a DIY meet. Not sure of what woofers to use...

This probably doesn't belong in this forum, but I figured the DIY gurus here would know this... (Admin note - thread moved) To help my recently widowed mother-in-law operate her system, and eliminate the "coffee table full of remotes", I got her a Phillips Pronto TSU3000. It came with a CD...

I recently visited a local elementary school and happened to observe their music program. Once or twice per week, each class rotates through the "music room" for music study. The curriculum includes singing, playing various instruments, and listening to music. It was heartwarming to see kids...

Buying a pair of N26AWIIs for the patio. JBL offers an optional wall mount for $50. If I'm not too picky about the mounting angle, can I just use ordinary hardware??

Impressively built, high efficiency, 15" drivers. Click JBL Pro website for details, including T/S params. I have three with brand-new JBL factory recone. One is serving duty as my front sub: In that 4 cu ft vented, sixth-order alignment (which is identical to JBLs venerable B380 sub)...

SACD seems to be going multichannel these days. Unfortunately my player doesn't have multichannel capability (Sony 9000ES). What happens when I play a multichannel SACD? It seems that if only the front L-R channels are reproduced, a significant portion of the recording will be missing. Do these...

I started pondering subwoofer calibration methods (did someone say engineers are boring? :D ). It seems that if pink noise is used (equal energy per octave), then raising the crossover frequency (so that the sub covers, say, three octaves instead of two) will increase the measured loudness. One...

I'd like some outdoor speakers for the backyard/pool area, but have been generally disappointed at the models I've come across: weak bass, poor sound, lousy efficiency, modest power handling, etc. Has anyone tried DIY weatherproof speakers? It doesn't rain often here, so I figured that marine...

I'm looking at a schematic for a crossover designed by Dynaudio (shown below, hopefully) and there are a bunch of parts on the right side just hanging off the input. If the amp source impedance is really zero (or darn close)... what could these parts possibly do...

Santa brought my boys a Nintendo Gamecube for Christmas. The system it's playing on includes some DIY 3-ways with Vifa P17WJ woofers (don't ask why three-way... I had leftover midranges and I wanted to experiment... and yes, the crossovers were a total pain and probably cost more than the...

Edit: Sorry the link didn't work I needed a riser for the second row couch so I decided to create a sub. It's about 10 cu ft tuned to 23Hz using a JBL 2245H 18" driver. With 6dB of boost it's ruler-flat to 23Hz . BassBox models it at 121dB with 300 watts (actually it's excursion limited at the...

There seems to be a consensus that the improved transient response/lower group delay of sealed subwoofers "sounds better", particularly for music. My own emperical data tends to support this. However, since most of these alignments need equalization (LT, BFD, etc) to achieve flat response...

I've been using National LM833, and then later Analog Devices AD797, for a number of years with good results. Is there anything better? Also, the AD ap notes on the AD797 suggest using AD811s as a line drivers for the final stage --to drive long cables. Are these required? I hate to add active...

I've tried to surf through the plethora of DIY sub info in this forum but bogged down under the mountain of posts. I'd like to build a front (main) sub to complement my LFE sub (which is built into the platform for the second row of seats in the theater... it makes a nice buttkicker as well...

I'm having trouble getting the bass "right" in my new theater --thin at some frequencies and boomy at others. I suspect that my DIY speakers have some response "funnies" I just haven't noticed before. I have access to a Schlumberger response analyzer. It will analyze and plot out the gain and...

I'm thinking of building a sturdy riser for my second row of theater seats and using it as a sub. I would imagine that 1" MDF, thoroughly braced, will be structurally fine for this 300-liter enclosure (approx. 60"x50"x6" internal). But will the long, flat box cause any resonance or tuning...

I'm building a sub for our new dedicated HT using JBL's 2245H. The vented, 6th-order alignment yields F3 of 24Hz and ruler-flat 121db(!) output. But it requires a 9+ cu ft box. I'm struggling with where to put it. There's a spot about halfway down the side wall but the path length from the...

I'm just completing my dedicated theater (photos coming soon). Does anyone have plans (or just the equations) to build a quadratic residue diffuser, such as those sold by RPG? I'm envisioning something about 3'x3', in solid walnut, that hangs on the wall. ------------------