Should i buy these SDA-2A?

Well, the wheels came of this bus. Look, I know what both of you are saying and both have good points. One doesn't need gobs of power to drive SDA's, but it sure as heck doesn't hurt as they do perform better when feed a high current diet. On the other hand, an AVR is not the best choice for 2 channel music. In the case of the early SDA's, which are rated at 4 ohms nominal I think it's a very good idea to have a power amp rated to drive them. The AVR's that are rated to drive 4 ohm loads restrict current, so they really aren't capable of 4 ohm loads.

As for the non-common ground issue, there isn't an AVR made that isn't common ground, but when it comes to a power amp and you don't know for sure, it would be best to be positive before hooking it up to your SDA's. Like Troy said, most power amps are common ground, dual mono amps can or cannot be and mono blocks are always non-common ground.

I do get sick of seeing the, you need 200wpc to drive SDA's. That got stuck in someone's head and gets repeated as if it was written in stone. There are numerous variables making each application different. Perhaps a better suggestion would be the old saying, if the first watt sucks, why bother.

Troy is a good friend, we've known each other a long time and I like David, he's a good guy too. Since I am still President of this club I'm issuing an executive order, ya'll shake hands.

I'm cool with that....I'm not trying to pee in anyone's cornflakes at all and I really didn't mean to start a Urinary Olympiad, so if Dave took offense, I genuinely apologize. It was not my intent. Beer is on me.

Jesse "I spit on receivers" the peacemaker? Huh??

Again, my whole point was just exercise some common sense. Yes, all things being equal (that's a big IF) more power is better but as Jesse pointed out, if the first watt sucks, why continue?

BDT

It's all good Troy

I'd be happy to walk you through it when you're ready. The "TL" Mod refers to modifying the Hi-Pass Section of the Crossovers to use the RDO-198-1 Tweeter, instead of the RDO-194-1 Tweeter. Both are excellent tweeters, but the 198 has a bit more detail than the 194. The 2As, and 86' CRS+ are not sanctioned by Polk for this Mod. It was discussed at length in a thread years ago, and the consensus was it should work. To my knowledge, I was the 1st to actually do it, and report my finding. Since then, I've done it for many others. The 2A and 2B Hi-Pass Sections as essentially Identical, except for one resistor in the shunt.

cascius wrote: »

Sweet, thanks in advance!

I'm also considering refinishing the cabinets, maybe using this veneer:



I think it would help "modernizing" them quite a bit.

Your photos didn't post

Unless they were special order, with real wood veneer, they most likely have wood grained vinyl.

The wood grained vinyl cannot be sanded. It would have to be removed and a real veneer applied. From what I've read this can be done but it sounds challenging and time consuming.

Just wipe them down with Windex, give'em a buff and call it a day.

The glue used to fix the magnets in place on the mids tends to weaken over time.
The idea is to reinforce the stock glue holding those magnets in place and prevent them from shifting during transport or in the unlikely event of a tip over.