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Using larger power transformers in low power-draw source components

I was told by two different people that using vastly over-specced power transformers in a source component power supply - ie. t/table power supply/preamp/phono stage/crossover - is a good thing; it gives more "weight"/"body" to the sound.

This is hard to believe as it does not follow the "maths/theory" but I recently lashed out and spent US$70 on a pair of Antrim 15-0-15v, 160VA toroids (and a day's work!), to replace the 30VA toroids which I had used for my active crossovers.

As each (mono, 3-way) crossover only draws less than 100ma, I had assumed that the 30VA toroids - which can supply 1 amp - were more than adequate.

However, after replacing them with 160VA toroids (which can deliver 5.3 amps), I find that the people I talked to were correct!! The resulting sound from my speakers does indeed have more "substance". Amaaazing!!

So I recommend this move! The theory is along the lines of there being a much lower flux density in the toroids, during the charging cycle. As toroids are typically built to minimal "flux-density-headroom", under-stressing them delivers a sonic benefit.

Regards,

Andy


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Topic - Using larger power transformers in low power-draw source components - andyr 02:34:54 06/21/04 (37)
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