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In Reply to: RE: You'd do better with this on Vintage.. but Dynaco A25s will get you there. posted by marc-homeslice on February 25, 2012 at 11:28:16
The A-25's are a great value and easy to find. They seem kind of like Dynaco ST-70 amps - the price seems to always be about the same, so, apart from inflation, I suppose, you can just about always sell them for what you paid. They do turn up on eBay quite often, though shipping cost could be a factor. I haven't seen them in the local Goodwill (I kinda think there's some kind of leak between the donation station and the store - nothing but sh!t ends up in the store) but have seen them on craigslist from time to time.
I have a pair of them I've used with a Dyna ST-70, Fisher 500 & 800, Marantz 8B, Dyna Mk III's, etc., and they sounded just fine with all of them. Not hyper-efficient, mind you, and not really exceptional in any respect, but very pleasant, non-fatiguing, nice to listen to.
The A-25's bass poops out at about 50 Hz and the top end rolls off about about 12 Khz. But these are speakers which sound like music and obey the first law of speakers: get the midrange right!
They don't need gobs of power and have a flat impedance curve, so they're not going to interact with tube amps having a high output impedance.
20-25 watts is fine, although the speakers will never deliver ear-bleeding levels.
The A-50 (if you can find it) has the same tweeter, so the top end will be the same. It uses two woofers, so the bass is a little more authoritative and deeper.
When they 1st came out Stereophile reviewed them as having the best bass there was. They didn't mean the deepest but the cleanest. And since they were the best selling audiophile speaker of all time they can still be found pretty easily.
Found a pair of Dynaco A25's at our local thrift several yrs ago for $5. Amazed at how good they were. Used in primary system for a while until they were edged out by a vintage pair of KLH 6 found at the same thrift for $12. The last year or so, thrifts have become a dry well for vintage gear in our area. Craigslist could be a good bet. Prevailing market price will be found on ebay.
After I dragged a pair of free Dynaco A-25 speakers home (one speaker wasn't working) and spent ten minutes on repair I was shocked to find that I preferred them to the audiophile-approved ACI Sapphires I had at the time. Even more so after replacing the single capacitor in the crossover with something not 35 yrs old (I used Obbligato copper caps).
They work great with tube amps (I've used them with an Eico ST-40, an Onix SP3, and my current Audiomat Prelude Reference) and capacitor-coupled vintage SS amps like the Marantz 2230 receiver. I still have my pair and still love 'em.
Wouldn't hesitate to recommend them with enthusiasm.
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