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Topping E70V filter response
Posted: January 4th, 2024, 7:50 pm
by Stuart Polansky
Found this interesting for anyone choosing which filter to use if you have a Topping E70V. I know that several people in the group have one.
https://www.audiosciencereview.com/foru ... 88/page-59
Re: Topping E70V filter response
Posted: January 4th, 2024, 8:17 pm
by FerdinandII
IMHO
This is the main benefit from higher sampling rates. Lower order (slow...) filters can be used without attenuating audible frequencies.
I can think of only a very few cases where subjective reviewers have preferred the sharp (fast...) filter choice.
Re: Topping E70V filter response
Posted: January 4th, 2024, 8:21 pm
by HAL
What would also be interesting is if they posted the impulse response of the AK4499EX DAC.
The first filter is a linear phase filter with pre-ringing. That does not show up in a frequency response plot. That is a non-causal filter that is not particularly good for music. The second filter is a minimum phase filter (Slow Roll-off) that is very good. The others are variants with one being a minimum phase apodising filter.
Fun with filters.
Re: Topping E70V filter response
Posted: January 4th, 2024, 8:47 pm
by FerdinandII
HAL wrote:What would also be interesting is if they posted the impulse response of the AK4499EX DAC.
The first filter is a linear phase filter with pre-ringing. That does not show up in a frequency response plot. That is a non-causal filter that is not particularly good for music. The second filter is a minimum phase filter (Slow Roll-off) that is very good. The others are variants with one being a minimum phase apodising filter.
Fun with filters.
The audioscience guy has a very warped and limited set of criteria for what's good and what's bad.
Frequency response isn't everything...!!