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Audio and Video Talk
Vinyl
Where are the valve pre-amps and phono stages
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<blockquote data-quote="Ampdog" data-source="post: 216346" data-attributes="member: 144"><p>Further to the above: It is an annoyance, but there could also be a change in characterisitcs. E.g. one is warned to change the Quad 22 feed cable, as the capacitance of the screened signal leads form part of the pre-amp output filter. It was convenient then to do things that way rather than e.g. build in an extra cathode follower just for independance. (One did after all want to sell your own paired equipment.) That does not mean that brands cannot be mixed; but it does require a certain degree of know-how and test equipment to make sure the end result is in order. Feeding power from the main amplifier is convenient/ecomonical - one power transformer etc. - also making the pre-amp lighter.</p></blockquote><p></p>
[QUOTE="Ampdog, post: 216346, member: 144"] Further to the above: It is an annoyance, but there could also be a change in characterisitcs. E.g. one is warned to change the Quad 22 feed cable, as the capacitance of the screened signal leads form part of the pre-amp output filter. It was convenient then to do things that way rather than e.g. build in an extra cathode follower just for independance. (One did after all want to sell your own paired equipment.) That does not mean that brands cannot be mixed; but it does require a certain degree of know-how and test equipment to make sure the end result is in order. Feeding power from the main amplifier is convenient/ecomonical - one power transformer etc. - also making the pre-amp lighter. [/QUOTE]
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Audio and Video Talk
Vinyl
Where are the valve pre-amps and phono stages
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