borat
Seeker Of Truth
Posts: 2
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Post by borat on Dec 14, 2020 15:25:15 GMT -5
Hi,
The spec sheet for PT-100 lists the Frequency Response as:
5 Hz to 80 kHz +/- 0.25 dB (192k sample rate).
For the A-100 Frequency Response: 20 Hz – 20 kHz + / - 0.08 dB
I'm using the A-100 as an headphone amp in Direct Drive mode.
My headphones have Frequency Response: 8Hz- 65 KHz
Are the headphones losing on frequency responses outside of the 20 Hz – 20 kHz range of the A-100 amplifier? Does the amplifier drop the frequencies outside of it's response range?
Thanks..
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KeithL
Administrator 
Posts: 9,937
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Post by KeithL on Dec 14, 2020 15:50:52 GMT -5
The frequency response of the A-100 is FLAT within +/- 0.08 dB from 20 - 20kHz... That means that it's exceptionally flat inside that range; which is the generally accepted "range of human hearing".
It's frequency response extends far beyond that range in both directions... just at a slightly wider tolerance.
I should also point out that the frequency response of human hearing rarely extends much beyond 20 kHz. (Although I have read that house cats can hear as high as 60 kHz.)
With DIGITAL audio the frequency range is limited by the sample rate... So, for example, the maximum frequency you can encode at 192k is slightly less than 96 kHz... And, at the 44.1k sample rate used for CDs, the maximum frequency you can encode is slightly less than 22 kHz...
Hi, The spec sheet for PT-100 lists the Frequency Response as:
5 Hz to 80 kHz +/- 0.25 dB (192k sample rate). For the A-100 Frequency Response: 20 Hz – 20 kHz + / - 0.08 dB I'm using the A-100 as an headphone amp in Direct Drive mode.
My headphones have Frequency Response: 8Hz- 65 KHz
Are the headphones losing on frequency responses outside of the 20 Hz – 20 kHz range of the A-100 amplifier? Does the amplifier drop the frequencies outside of it's response range?
Thanks..
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borat
Seeker Of Truth
Posts: 2
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Post by borat on Dec 14, 2020 17:10:06 GMT -5
The frequency response of the A-100 is FLAT within +/- 0.08 dB from 20 - 20kHz... That means that it's exceptionally flat inside that range; which is the generally accepted "range of human hearing".
It's frequency response extends far beyond that range in both directions... just at a slightly wider tolerance.
I should also point out that the frequency response of human hearing rarely extends much beyond 20 kHz. (Although I have read that house cats can hear as high as 60 kHz.)
With DIGITAL audio the frequency range is limited by the sample rate... So, for example, the maximum frequency you can encode at 192k is slightly less than 96 kHz... And, at the 44.1k sample rate used for CDs, the maximum frequency you can encode is slightly less than 22 kHz...
Hi, The spec sheet for PT-100 lists the Frequency Response as:
5 Hz to 80 kHz +/- 0.25 dB (192k sample rate). For the A-100 Frequency Response: 20 Hz – 20 kHz + / - 0.08 dB I'm using the A-100 as an headphone amp in Direct Drive mode.
My headphones have Frequency Response: 8Hz- 65 KHz
Are the headphones losing on frequency responses outside of the 20 Hz – 20 kHz range of the A-100 amplifier? Does the amplifier drop the frequencies outside of it's response range?
Thanks..
Perfect! Thanks for the detailed explanation Keith. I wanted to understand in general sense how to read amplifier specs. It's not so much that I may miss out on listening to certain frequencies, I was wondering more about the compatibility of the solution I built. It's actually nice to know the PT/A-100 can perfectly drive the H6SE.
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Post by garbulky on Dec 14, 2020 17:16:22 GMT -5
Hi, The spec sheet for PT-100 lists the Frequency Response as:
5 Hz to 80 kHz +/- 0.25 dB (192k sample rate). For the A-100 Frequency Response: 20 Hz – 20 kHz + / - 0.08 dB I'm using the A-100 as an headphone amp in Direct Drive mode.
My headphones have Frequency Response: 8Hz- 65 KHz
Are the headphones losing on frequency responses outside of the 20 Hz – 20 kHz range of the A-100 amplifier? Does the amplifier drop the frequencies outside of it's response range?
Thanks..
What headphones do you have? Chances are that they do not actually perform to that frequency spec - at least not in a manner that results in enough volume |
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KeithL
Administrator
Posts: 9,937
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Post by KeithL on Dec 14, 2020 18:28:27 GMT -5
Rest assured it will drive the HiFiMans really well...  The frequency response of the A-100 is FLAT within +/- 0.08 dB from 20 - 20kHz... That means that it's exceptionally flat inside that range; which is the generally accepted "range of human hearing".
It's frequency response extends far beyond that range in both directions... just at a slightly wider tolerance. I should also point out that the frequency response of human hearing rarely extends much beyond 20 kHz. (Although I have read that house cats can hear as high as 60 kHz.) With DIGITAL audio the frequency range is limited by the sample rate... So, for example, the maximum frequency you can encode at 192k is slightly less than 96 kHz... And, at the 44.1k sample rate used for CDs, the maximum frequency you can encode is slightly less than 22 kHz...
Perfect! Thanks for the detailed explanation Keith. I wanted to understand in general sense how to read amplifier specs. It's not so much that I may miss out on listening to certain frequencies, I was wondering more about the compatibility of the solution I built. It's actually nice to know the PT/A-100 can perfectly drive the H6SE.
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