|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
66.82.9.30
In Reply to: Harmonic Tech Cyberlight --shocking measurements posted by Jon L on March 9, 2005 at 09:46:10:
I have a 3 meter HT Cyberlight wave 6V here on test. I used my old Heathkit signal generator (600 ohms output impedance). I measured the frequency response at 30 cycles, 100 cycles and 1000 cycles, 10,000 cycles and 100,000 cycles. The load was 20K on the scope. Same exact measurement at 30 cycles and 100 cycles and about one quarter db down at 1K, 10K and 100K. Obviously, this cable is not the normal HT as not very many people would be using the 6V wave (which attenuates the signal by 8db). I was using a 600mv RMS sign wave and so what came out was 8db less. Anyone with a decent sign wave generator and a scope should be able to measure the normal HT cables (PS2 and wave). I would be suprised if they measured any different. I imagine that the cables measured by the other guy were the original version before tweaking by HT. Obviously, they are not what I have here. Square wave rise time is about 300 nanoseconds which would be about one meg bandwidth. I am sure the other Harmonic Tech cables would be faster as they don't have the padding this cable does.
Follow Ups:
Thank you, Ric.
Just goes to show that when something's new, everyone gets their bowels in an uproar, as Dad used to say!
(-"
Jonathan
By the way. I measured the same response using a 12V battery. Actually, the square wave looked a little cleaner (smaller ripples after the initial rise) with the battery but all frequency response measurements were the same. Most of the time the differences we hear (like the wall wart versus the battery supply) cannot be correlated with measurements.
This post is made possible by the generous support of people like you and our sponsors: