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Old 29th March 2012, 05:30 PM   #11
DF96 is offline DF96  England
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The architecture of an amplifier will tell whether it is capable of being direct coupled, as not all are. If one is capable of being direct coupled then whether it is or not is a design decision so, as others have said, you have to ask about a particular amplifier or look at the circuit diagram. You have been given good advice.
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Old 29th March 2012, 06:00 PM   #12
JoeDJ is offline JoeDJ  United States
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Quote:
Originally Posted by DF96 View Post
The architecture of an amplifier will tell whether it is capable of being direct coupled, as not all are. If one is capable of being direct coupled then whether it is or not is a design decision so, as others have said, you have to ask about a particular amplifier or look at the circuit diagram. You have been given good advice.
That is probably the most informative explanation that have read anywhere on the subject.

That clears things up for me for the most part.

Last edited by JoeDJ; 29th March 2012 at 06:03 PM.
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Old 29th March 2012, 06:06 PM   #13
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Quote:
Originally Posted by godfrey View Post
If in doubt, you can always do the AC coupling yourself; just put a suitable capacitor between the Little Dot's output and the power amp's input.
That's what I would do.
But there's always someone who's severely allergic to caps.
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Old 11th September 2012, 07:46 PM   #14
hebrer is offline hebrer  Slovakia
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Default Direct coupling in different amps to be used with LD preamp

I am hoping people at this forum who are more knowledgeable than myself would help me determine if my amplifiers are of the direct coupling type or not. One is a modified Decware Zen design with EL84 power tubes and 6922 tubes in the preamplifier section, plus rectifier tube for the power (pictures attached). I am considering ordering LD Mk III or LD Mk IV which I plan to use mostly with active monitor speakers (Yamaha HS50M) but may wish to connect it to this Decware Zen clone or perhaps t-amp from Arjen Helder. Any thoughts which of these amplifiers/active monitor speakers might use direct coupling please?
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Old 12th September 2012, 08:24 AM   #15
hebrer is offline hebrer  Slovakia
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Perhaps I should add that I also contacted the builder of the amp shown in previous message (still waiting for reply).
Peter
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Old 12th September 2012, 08:16 PM   #16
hebrer is offline hebrer  Slovakia
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OK, I got the answers I needed. Apparently there is a capacitor used in between the stages in the design shown above so the amp is not directly coupled.
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