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Thought on OTL tube amps

Just curious....how do these sound/perform compared to tube amps with transformers? Why do you prefer one or the other? Any particular brands of OTL amps you would recommend listening to? You can see my system on my tag here...listen mostly to rock and roll with a smattering of jazz and a bit of classical once in a while. The next stop on my amplifier adventure is an OTL model, and I have no intention of trading it for either SET I currently have, as I'm very happy with both. One of the ways I enjoy experimenting with different "sound" is by switching up the amps. Just trying to solicit some opinions, of which I know there are many strong ones here at A-Gon. Thanks in advance!
afc

Showing 7 responses by xonex77

xonex77
42 posts
 
Using the Zero in OTL, kill dynamics and will not be OTL anymore.Going back to  PP.
xonex77
42 posts
 
Using the Zero nullify an OTL status.You already get rid of transformer then put new Transformer?Whats happening? going in circle?
xonex77
42 posts
 
The output can not be equal to input always,How do you categorize amplifier with an output transformer?OTL?Are we going in circle?or we might just go back to SE or PP.The mean reason why  these amp were design is that they will work without OPT.
xonex77
42 posts
 
Al,That's their selling point plus the exotic wooden case, which has nothing to do with sound or else  zero will not be in bizznes,I already ask him,the autotransformer maker  about if it kills dymanics and  he said decide it yourself.Auto transformer works two ways either step up which makes the sound louder or step down which make the sound lower.
xonex77
42 posts
 
Paralleling a choke/inductor/coil in the amps 4 ohms output will  be  less than 4 ohms and same thing to a voice coil of 4 ohms will  be  less than 4 ohms due to ohms law,then sound will be louder due to less resistance and more current.The only way to increase the impedance of the speaker is to put a coil/inductor   in series with the voice coil,which of course it kills dynamics.
xonex77
42 posts
 
Most OTL design  require high high impedance speakers,flaws in the design that these amps should work without these impedance matching,but not all OTL have these inherent disadvantage,I have an OTL using KT120 or VV52/300B output tubes  that welcomes 4 or 8 ohms  and a   full-range speakers.But if I insert  the ZERO, it  kills every thing.  
xonex77
42 posts
 
Please review your your electrical circuits about series /parallel of resistance,inductance and capacitance,I don't like to trash anybody but there is no point in  continuing  the discussion if the  theory is not fully  understood.
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