I have measured a 1.5 decibel increase in gain with the use of a Sistrum Sp1 platform and 3 Audiopoint apcd2 coupling discs under a Krell 280cd player. I new I could always hear a big increase in detail, staging and dynamics but never tried to put numbers to what I heard. I had a fellow co-worker dare me to measure what I professed to be hearing. My co-worker and I took our stores Audio Control Rta ran several test tones thru the Krell player at a preset pre-amp level and recorded this to the memory of the rta. We then placed the Sistrum Sp1 platform on 3 apcd coupling discs and then placed the same Krell player on the platform and repeated playing the same tones thru the cd player without any alteration to the pre-amp level. We recorded between 1 and 1.5 decibel gain in level when using the Sistrum Sp1 platform. The rack that all the equipment was on, was a Furniture Works 5 made of steel with wooden shelves resting on steel points on carpet over concrete. I have never attempted this test on any so-called isolation shelf or racking system.. Tom
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- 189 posts total
- 189 posts total