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In the Forum: Analog Playback
In the Thread: The Expressive Technologies SU-1
Post Subject: The "bad" S&B resellers...Posted by Romy the Cat on: 1/5/2005

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Antonio, I never understood this concept of “gain selector”. If I remember correctly S&B had 10, 20 25 db options via re-wiring of the primary coil. It is not complicated to place primary in some kind of rotary 3-position switch but it would be completely unnecessary. Presumably all those aftermarket S&B resellers try to convince buyers that by they would “have a flexibility to select a gain whatever they wish” but I find that it is quite a bogus benefit. Fist: it is VERY difficult to fine a switch that would commutate 0.3mV signal without any sonic degradations (at list I was not able to find any). Second: people need one permanent gain for one given cartridge/phonocorrector and no one doing the switching after a necessary gain was found (people who use multiple needles and multiple arms usually have multiple phonocorrectors). Third: by flipping the primary coils and changing the gain we change loading impedance and therefore we observe not only the gain effect but also the variations of cartridge’s coil damping. Therefore, if you’re willing to use S&B then get them raw and considering that the cable between the transformer and phonostage is the most critical of all then just mount those S&B directly to the binding posts of your phonocorrector. The S&B despite of very simple mu-metal can are quit quiet and it can easily work in this application. I would go for 20-25db and then just tune the loading resistor. To have those “luxury” options that Bent Audio and few other offers I find not only unnecessary but also “bad for sound”.

The Cat

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