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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: Re: The Raptors are monoblocks and $5K the pair. posted by theaudiohobby on December 22, 2006 at 09:35:17:
"when it is nothing than an impedance matching device"It is a couple hundred meters of thick gauge copper wire, not just "an impedance matching device". A big part of the reason an OTL has such a good HF response is that it has no output transformers to muck things up, which all but the best transformers do. I would suggest that Speltz autoformers are also not the ideal in terms of wire thickness to promote good HF reponse. What I am saying is simply that if a 1/2 meter length of the same wire (yes the anti-cables and the zero former use the same wire) as the autoformer can be heard degrading the HF compared to good thin gauge silver wire, then imagine what a hundred meters of it can do.
I am not sure you are aware of this but tubes can perform very well at high frequencies...delivering power at high frequencies is exactly what transmitter tubes were designed to do. It is more difficult to find a transistor to deliver high power at high frequencies. It is the output transformer that limits the HF of tubes for the sake of better impedance matching at lower frequencies and to deliver more current into those loads. I have heard only 1 or 2 transformer coupled tube amps with highs as good as an OTL and not a single transistor amp especially no Class D amp.
Al's amps were DIY based on older Atmasphere designs as Ralph himself has pointed out many times. No one knows for sure what Al's amps really sounded like but Al. Al seems quite competent though so I am assuming they were close to what comes from atmasphere.
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Follow Ups
- Re: The Raptors are monoblocks and $5K the pair. - morricab 10:31:28 12/22/06 (3)
- More context... - Al Sekela 14:05:48 12/22/06 (2)
- Re: More context... - morricab 16:13:48 12/23/06 (1)
- Thanks for a thorough discussion. - Al Sekela 13:00:00 12/25/06 (0)
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