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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Log vs stepped attenuator vs.impedance and frequency rolloff posted by airtime on July 31, 2014 at 09:39:25:
To get natural balance and soundstage one must fine tune playback volume. Two dB (or greater) steps will not cut it. Frequently one can hear that the best setting is half-way in between two steps. I use a stepped attenuator with 1 dB steps and find this to be OK, but others suggest that 1/2 dB steps are better.
The high frequency roll-off depends on the resistance selected and the load capacitance (cable plus destination). Lower resistance and/or lower capacitance means less high frequency roll-off. However, the resistors are in parallel with the load and if they are too low they may overload the drivers at the source. Passive attenuators are best used with short runs from the attenuator to the amplifier input. You can also minimize the effects by using (expensive) low capacitance cable. The sound quality issues will be the same with stepped on continuous attenuators, except that the continuous attenuators may have more opportunity for noisy contacts.
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
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Follow Ups
- RE: Log vs stepped attenuator vs.impedance and frequency rolloff - Tony Lauck 08/2/1407:14:14 08/2/14 (0)
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