Blvdre

Seems like an easier approach as compared to the alternatives. How about some details about the process? How is the sound?

That material doesn't look like mica to me (as much as we can see), it looks quite a bit thicker and metallic, not crystalline.

The passive will mirror the woofer movement - does he notice the woofer fluttering? Also, what I would judge to be visible fluttering would be subsonic.

Link

Not sure, but they're similar to the Altec 816 or JBL 4560.

Thanks for the offer. I actually have a very small vac that should work really well for this application. THANKS!!! No problem. Sounds like the little guy might not have enough pull anyway.

Seti I can get my hands on a small vacuum pump that would probably be appropriate, and it runs off of +24V (wall bug). It's not a wet pump though, so you'd have to have a waste bottle between your cleaning manifold and the pump (and empty when it nears full to avoid flooding the pump.) The pump is about the size of a discwasher record brush. Just a thought.

My guess (real helpful, right?) is that any material you use to patch the hole will alter the surrounds compliance.

No, I wasn't making a judgment call, just pointing out that when contouring w/ a passive network, you're shaping via subtraction. In your example (all other considerations aside), I see that it's a wash. Interesting point about the acceptability of attenuation v.s. boost. Maybe people are disdainful of boost because it involves active circuitry. I would think that, depending on your personal taste, either method can be satisfactory, as long as properly executed.

Good point Mike, there's no "boosting" involved, only attenuation. My knowledge is pretty minimal in these matters, but I do know that even with exponential horns, such as the 511 or 811's, a bit of contouring is still required. I had to add an RC contour to my 511/902 LaScala set-up to make things right. After the fact, I looked at the model 19 x-over contour, and my values were virtually spot-on. Whoever posted those 902 response curves here, thanks.

Yes, for values that large you'll want to go with npe caps.

The S-shaped component in the schemo is the 1.25 amp fuse. I would just get an inexpensive fuse, say at the hardware store, or you could buy online at various sites. Make sure you buy a fast blow fuse! Parts Express is good for pieces/parts. The scratchiness you're hearing is from dirty controls, and a good spray of deoxit will clean them up.

A cap refresh would probably be a good idea. That website has a pdf of the crossover . Spend your money on the 4.6 and the 19uF (some nice polypropylenes) and non-polarized electrolytics for the 50's and 600uF.

Amy, Point taken, didn't mean to ruffle anyone's feathers by adding fuel to the fire (love the low as well as the high-brow stuff, a combination being the best). I've played the game myself on a few occasions, using large washers and beanbags. It's not horseshoes, but fun just the same. And you may want to remove the link you posted - the cornhole glossary is chock full of double entendres and will just encourage further bad behavior [:#] [] Congrats on the Cornwalls, reddog5. I still miss mine, sold them for LaScalas. I love the LaScalas, but I think the Cornwalls are more forgiving on "not so great" recordings, which constitutes most of my collection. Enjoy!

Does anyone ever really win in that game?

Ditto on Wright gear. I'm running his WPA3.5 mono amps with his WLA12 preamp, and am very happy. He offers 2a3 and 300B single-ended designs if you're OK with the lower power (you'd be surprised at what 3.5 watts of Wright power can do), or he has some higher powered push-pull designs, one being a nice integrated (as was already pointed out). Also, I've owned a JuicyMusic Peach preamp, VERY nice - can't go wrong there either.

Always love to see your work, Greg.

Thanks for that Larry. I was only aware of method one, which is a bit of a pain because you can only post one pic per reply, and the forum limits multiple replys.

Sounds like you earned 'em!

The Sophia babies come up periodically, usually within your budget. Haven't heard one myself, but people seem to like them.Or if you already have a preamp, people praise the Don Allen amps Don Allen Amp

Hey, no problem OB. A lot of good and hard to find stuff!

Great choice on the doghouse grain running horizontal!

Thanks OB. I've got pretty thick skin, so no offense taken. As I get older, I like to think that I'm getting more crotchety (after all, it's the right and duty of the elderly!), but find that I'm more tolerant than ever....except for those damn kids walking across my lawn..."Hey! Get the hell off my lawn you little bastards!"

No offense taken. I'm still a newbie here myself, and can appreciate what you're saying. Having said that though, I can already tell that this is a close-knit supportive community (thanks for the e-mail Michael!), and those that re-direct mean no harm. A little gentle re-directing can get things back on track. And sometimes I'm guilty of re-directing, so pot and kettle black, etc. Thanks for the head's up on Human Speakers. I still have to ask my brother about his Genesis (saw him last weekend, forgot to mention it). I may have to resort to a sticky note applied to my forehead Funny coincidence, when I first bought my Genesis, I ran them on a Scott receiver, then upgraded to a Harmon Kardon.

Ok, so the amp fixed it...but c'mon, admit it: you're still thinking "maybe I should try some fresh caps anyway....". Yeah you should, listen to those voices!