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Post by splendor on Nov 23, 2007 4:47:06 GMT 7
There's discussion about which "cheap" amp runs well on the LS3/5a at the original LS group, UK.
It's quite interesting conversation about that doctor who first liked the LS plus AB1s but 'now bashes the LS3/5a to no end." It would be helpful to know what "killed" the LS? We can perhaps list it down as one of the "negatives" and get around with it justifying why it need that be!
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Post by splendor on Nov 25, 2007 7:37:29 GMT 7
I found the schematics on the ampex 620 that I recently got from ebay and brought to me thru the kindness of Dan Hayes.
I think this is an interesting ampex amp. The notes say that the amp has a flat response thru the speaker jacks in the front panel. But if one chooses to use the speaker terminals provided at the chasis, the amp will not be "flat" since it has an equalization circuit that is designed to mate with a 12 ohm JBL speaker housed in a "maleta" together with amp itself. This underscores the importance of giving the right ohmage.
This ampex was intended as a guitar but does double duty as an audio amplifier for playback of recordings. Using the speaker jack, it will yield a flat response like any audio amplifier. This raises the potential of this amp for audio music but as it is, the amp is quite listeneable on the 12 ohm speaker tap, a quite intriguing connection on the 11 ohm LS3/5A.
I will try connecting it on my LS as soon as I have some hours of stable listening to the amp to see where this might go. It no doubt has the 6V6 rich tone sound even with its equalization circuit in place. Pictures of amp will follow later.
One might say this is just another vintage amp. But ampex triad transformers are known for their extension to the 100,000 hz. range. This makes the amp a little different than most vintage amps in bandwidth. Truth to tell, I noticed the apparent extension of the amp immediately after hearing it the first time.
Jo Ki has been experimenting with a new amp, the Diva Blue Sky, and one of the highlights of this amp why Jo likes it better than his Quad and Radford vintage amps is the extension it brings, coupled with a good grip to the music. The BS has both 11 and 15 ohms tap making it an interesting amp altogether for Jo Ki who wants to meet every requirement of this BBC monitor to make it even sound "better." We'll see if the ampex has that same potential!
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Post by Moz on Nov 26, 2007 10:23:25 GMT 7
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Post by splendor on Nov 26, 2007 12:15:46 GMT 7
Thanks Grant. I wanted to suggest that since it was off topic somewhat to the name heading. True. I will.
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Post by johnkeung on Nov 28, 2007 13:54:44 GMT 7
My toys for my LS3/5A :-) John Keung
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Post by Moz on Nov 28, 2007 15:08:15 GMT 7
That's a great array John. Which is your favorite? The TL12.1?
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Post by splendor on Nov 28, 2007 15:30:08 GMT 7
What a great collection of Brit amps. The LS I think is a Chartwell. John I believe is the one who has a wall full of LS3/5As! Maybe you can show it here also paleeze.
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Post by mossback on Nov 28, 2007 16:22:56 GMT 7
Good to see you posting here John! Yep, John has a "few" LS's. ;^)
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Post by johnkeung on Dec 25, 2007 5:53:21 GMT 7
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joki
New Member
Posts: 15
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Post by joki on Dec 25, 2007 10:46:16 GMT 7
I am using Diva Audio- Blue Sky stereo power amp (ECC35,2xECC31 & EL34 PP configuration) at the moment. This is my new amp. I was using Radford STA15, Leak TL12 Plus and prior to that, Quad II. This Diva amp was as a result of exhausted opportunity in owning a pair of Leak TL12.1 (I own only single unit of closed frame 12.1), it gives me pleasant surprise on how well it can make my LS3/5A sing, quite remarkable to say the least.
With the addition of its new preamp using a single tube ECC31, it has finally took out my Cello Etude passive pre after such a long time in service.
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aaa11
Full Member
Posts: 101
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Post by aaa11 on Sept 13, 2008 8:12:56 GMT 7
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