Jack 10s and Tuba 24s?

[jbass]

I'm planning to start on a set of SLA Pros this weekend while I wait for yet another Parts Express order to arrive (one crossover resister is backordered for about a month). First, however, I have a couple questions:

1. I'm not able to find the recommended 1/2" felt online at a price I'm willing to pay, so are there alternatives? I read elsewhere on the forum that carpet padding could work (if I can score a small quantity) and I have a lot of polyfill lying around.

2. I have eight 6.5" drivers and am trying to decide if I should go for four 2x6s or two 4x6s. Could a pair of 2x6 SLA Pros suffice as small mains in a low volume setting (speech, background music, etc.)? If so, the 2x6s would seem more flexible for my intended uses.

Thanks....

[Bruce Weldy]

Below is the link to my SLA Pro build......go down to the 5th page. That's where I have the padding. I just went to a carpet store and asked if I could get some of their throw aways.....I think I might have paid 'em 5 bucks for a bunch of it.


viewtopic.php?t=25887&hilit=powered+sla+pro&start=60

[Bill Fitzmaurice]

"the best material for damping is ½ inch thick felt carpet padding. A plus is that you only need a square yard or so, and can probably find that much sitting in the trash behind any carpet store."

SLA Pro Plans, page 7.

[jbass]

I was able to find 1/4" felt locally, but it was expensive and I've already spent a lot of money of this project. Instead, I found a shop willing to sell me a large cutoff of 1/2" carpet padding. I know it's not ideal, but it'll have to do. I also stopped at an audio repair shop to pick up the 10W/4 ohm resistors (Parts Express is backordered for a month), and this is what they had:

I can't find anything online about them being audio quality, but I'm only out a few bucks if they won't work.

[jbass]

Below is the link to my SLA Pro build......go down to the 5th page. That's where I have the padding. I just went to a carpet store and asked if I could get some of their throw aways.....I think I might have paid 'em 5 bucks for a bunch of it.


viewtopic.php?t=25887&hilit=powered+sla+pro&start=60

Thanks. That thread is very helpful.

[Seth]

How many carpet stores have you asked for 1/2" felt padding?

I didn't believe the plans, but decided to try anyway. The first place I tried gave me, free of charge, the remainder of a roll he had laying around. Said I would be doing him a favor if I took it.

Bill has said in the past that standard foam carpet padding is okay, just not as good as the felt carpet padding. He's also said he didn't know 1/4" felt padding existed and that it may be okay (you can find it on amazon).

I highly recommend driving around to at least 5 carpet stores before giving up.

I recently threw away the rest of the roll I had. I've noticed it's wedged in the dumpster and has been for a few weeks. I could go scavenge it for you. But, I can't guarantee it doesn't smell like garbage. Might not though. Never know.

[jbass]

I checked with several carpet retailers in my area and none were interested in selling anything but massive rolls of anything. Had I known that 1/4" felt could work at the time, I would've bought that instead of foam. Maybe I can make an exchange since I haven't yet used the foam. Otherwise, I'll just go with what I have.

Are you able to provide any input on the resistors I asked about a couple posts ago? I'm pretty convinced now that they're not the right type, but I'm hoping for confirmation from someone more knowledgeable than me.

[Bill Fitzmaurice]

Those resistors are fine.

[jbass]

That's good to hear. Thanks.