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Re: Bridge Rectifier Challenge - Viewpoints Welcome!

Posted by spindrifter (A) on May 16, 2007 at 20:01:53

In Reply to: Re: Bridge Rectifier Challenge - Viewpoints Welcome! posted by pkell44 on May 16, 2007 at 18:58:35:

Hi there

Thanks for your valuable input. Regret to say, I didn't build this device (would be proud to one day achieve such an amazing feat!). I purchased it for reasonable cost. Overall I'd suggest this phono stage performs with excellent musicality and minimal hum/noise. Nonetheless, even though the designer-builder did a great job, there are/were certain components that could be upgraded. I am in the middle of that process. By incrementally upgrading parts (nano-experimentation?) there might be some illuminating outcomes, or there might not, or I might remain curious, confused and sceptical. :-)

Unable to clarify precise grounding topology, except to repeat designer's claim that channel separation includes grounding. Thanks for the TI shielding tip which I might try myself (seems like the entire audio industry thrives on "proprietary metals" these days - it's like mystical alchemy all over again).

FWIW IMHO these are my random thoughts:
1. Not all op-amp/IC topologies suck. (Indeed they can provide valid solutions in certain applications, e.g, low-noise 1500 x amplification MC phono stages, if they are well implemented...)
2. Op-amps possess varying sonic signatures.
3. Shortest feasible signal path and minimal components are beneficial.
4. All wiring and connectors influence sonics.
5. AC supply will influence phono stage performance.
6. Shielding and isolation should be optimised.
7. Don't bother comparing oranges with apples (e.g., it's pointless comparing sonic attributes of MC with MM cartridges in the context of static/constant electronic gain stages - each circuit should ideally be optimised for each level/type of input signal.)

At the risk of creating considerable controversy I'd better leave it there. :-)

spindrifter

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