Fiio E17k Alpen 2
Aug 21, 2018 at 6:47 AM Post #512 of 516
Can these drive 650s proper?

Good website resource : http://www.digizoid.com/headphones-power.html

Input parameters = for HD650:
300 ohms
102 db SPL/V

E17K output specs are:
7.8 Vp-p = 2.76 Vrms
115 mA max power output
200mW into 32 ohm which considering hardware should equate to about 24 mW into 300 ohms

According to calculator - to fully supply power required by the HD650 (up to 115dB) you need 4.5 Vrms + voltage, 15 mA of current and about 67mW of power output.

You'll get the HD650 loud enough, but it'll be voltage starved, and no it won't objectively deliver best performance.

Subjectively though - my HD600 (similar specs) sounds pretty good out of the E17K, and the tone controls help with any loss of bass. Saying that I prefer to use something with more voltage output (A5 or Q5)

Hope that helps.
 
Aug 21, 2018 at 9:39 AM Post #513 of 516
Good website resource : http://www.digizoid.com/headphones-power.html

Input parameters = for HD650:
300 ohms
102 db SPL/V

E17K output specs are:
7.8 Vp-p = 2.76 Vrms
115 mA max power output
200mW into 32 ohm which considering hardware should equate to about 24 mW into 300 ohms

According to calculator - to fully supply power required by the HD650 (up to 115dB) you need 4.5 Vrms + voltage, 15 mA of current and about 67mW of power output.

You'll get the HD650 loud enough, but it'll be voltage starved, and no it won't objectively deliver best performance.

Subjectively though - my HD600 (similar specs) sounds pretty good out of the E17K, and the tone controls help with any loss of bass. Saying that I prefer to use something with more voltage output (A5 or Q5)

Hope that helps.

Very much so, thank you!
 
Sep 12, 2018 at 3:39 AM Post #514 of 516
I have the e17(first model ) and fiio e12 and a5. When i need a dac i use the e17 e12 combo (have the proper adaptors. Shall i see an improvement replacing the e17 with e17k and combine it with a5? I use sennheiser hd600 is there a good synergy?(the adapter that connects e17 with an amp is the same as with e17k?
I have also the lg hi fi plus dac. How does fiio e17k compare to it? (If someone owns them both)
 
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Jan 16, 2021 at 10:01 PM Post #515 of 516
My gosh.

It’s been so long that I have been using the Alpen 2 E17k....so after all this time (years and years) I guess I should write a little about it?

I purchased it hoping to use it out and about as a DAC/amp with my IPod Touch. I ended just using it at home with a MacBook Air with Colibri FLAC. And while I have Walkmans, the FiiO ends as an alternative and enjoyable change. I simply can’t believe how much I like the tone?

If you get very revealing IEMs it will show a laid-back quality that while being very clear.....is also the farthest from digital sounding. All the features work as planned out. It decodes 24bit and shows “locked” as described. Just one of the best values for anyone if they were searching for this style of sound. To me it’s a classic, not because of it’s neutrality but because the sound character it gives.

Total 10/10
 
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Mar 30, 2022 at 7:06 PM Post #516 of 516
I got the E17 and E17k in my hands. using the headphone out, the E17K has a tiny tiny bit more white noise vs. my E17 which didn't have anything. the E17k to me sounded more neutral/balance and faster (like less V shape?), like the bass, midbass, and highs didn't last as long if that make sense. I also feel it has a better soundstage/less congested vs the E17, and putting both on Vol 20 for example, the E17k sound a tiny bit quieter.

using line out on both for speakers, the difference is less notable but still there. the E17 does sound quieter.

the E17k VS BTR5 2021 (not using bluetooth), its very hard to notice the difference if any depending on the song, but when you do, the e17k has less punchy/dynamic bass. for rock songs, the e17k has less separation between the guitars and drums for example.
 
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