Astell&Kern AK380
Jul 11, 2018 at 4:18 PM Post #8,718 of 9,041
I laughed when I read y0our response, lol. it's a valid question as so much does affect SQ. I know someone who uses copper heat sinks on their massive mono block amps and they actually tested polished, oxidized and polished with a special covering to prevent oxidation (for looks only). What would affect SQ is on speaker terminals or any other connection.
When you polish them - maybe they sound sharper...
No - oxidation does not affect the sound
 
Jul 11, 2018 at 7:11 PM Post #8,719 of 9,041
I laughed when I read y0our response, lol. it's a valid question as so much does affect SQ. I know someone who uses copper heat sinks on their massive mono block amps and they actually tested polished, oxidized and polished with a special covering to prevent oxidation (for looks only). What would affect SQ is on speaker terminals or any other connection.

So it does sound differently? May I know if it sounds better with or without oxidation? Will polishing ruin the copper body?
 
Jul 11, 2018 at 8:20 PM Post #8,720 of 9,041
So it does sound differently? May I know if it sounds better with or without oxidation? Will polishing ruin the copper body?

Sorry, I was joking. Didn't come off right. No difference in sound. I actually polished mine...amp and DAP. No difference whatsoever. Polishing will ruin that dull oxidized finish (joking :) ). Polish it up, but it will quickly get oxidized again. I also wouldn't suggest applying quartermaster or lacquer as that would create overheating problems potentially.
 
Jul 11, 2018 at 8:21 PM Post #8,721 of 9,041
If anyone has interest in my 380cu wiht matching cu amp, let me know quickly as I'm about to post it for sale as I am moving up to the 1000cu.
 
Jul 12, 2018 at 1:07 AM Post #8,722 of 9,041
My AK380Cu and SP1000Cu sound better and better as it ages with time. Not sure if it is the burn in or the oxidation though. Different leather cases seemingly also make a difference. The best sound is without any case.
 
Jul 12, 2018 at 1:16 AM Post #8,723 of 9,041
Different leather cases seemingly also make a difference. The best sound is without any case.
Really? I know you’re quite a trumpet player Mr. Armstrong but your hearing must be quite amazing.
 
Jul 12, 2018 at 1:26 AM Post #8,724 of 9,041
Sorry, I was joking. Didn't come off right. No difference in sound. I actually polished mine...amp and DAP. No difference whatsoever. Polishing will ruin that dull oxidized finish (joking :) ). Polish it up, but it will quickly get oxidized again. I also wouldn't suggest applying quartermaster or lacquer as that would create overheating problems potentially.

Thank you! Hehe
 
Jul 12, 2018 at 1:28 AM Post #8,725 of 9,041
Is AK380CU + CU amp picky on iems? For example, may it drives better on dynamic iem more than BA?
 
Jul 12, 2018 at 2:25 AM Post #8,726 of 9,041
This depends on the impedance of the BA's - with a single ended output impedance of 2 ohm the matching inear should have minimum 16 ohm otherwise it could alter the frequencies.
When you get the SP1000Cu be aware that you are living in a country with high air moisture.
A few owner of SP1000Cu in moisture areas indicates also oxidation on SP1000.
 
Jul 12, 2018 at 2:52 AM Post #8,727 of 9,041
This depends on the impedance of the BA's - with a single ended output impedance of 2 ohm the matching inear should have minimum 16 ohm otherwise it could alter the frequencies.
When you get the SP1000Cu be aware that you are living in a country with high air moisture.
A few owner of SP1000Cu in moisture areas indicates also oxidation on SP1000.

I’ll be getting an used AK380CU + Cu amp. Do U think it’s too late to get?
 
Jul 12, 2018 at 4:22 AM Post #8,728 of 9,041
It is the right time to buy it - i did it also 6 months ago (a new unit). Don't believe that the SP1000 is a further step in SQ.
I agree the display resolution and speed of the CPU is better, but the SQ is not better but different.
i haven't heard it personally but it seems that SP1000 have broader and deeper soundstage, expanded treble extension and more resolution.
But maybe this unnatural gain in resolution make the SP1000 no more intimate and warm like the AK380.
I don't like the design of the SP1000 and the wobbling knob.
 
Jul 12, 2018 at 5:07 PM Post #8,729 of 9,041
Many like the 380 more. I want to try the 1000, hence selling the 380cu with amp. If it doesn't sell, I'm not too concerned as I love this DAP. It's just enjoyable even with some of the hotter headphones I've driven with it. With that amp, it will drive the bigger cans, including my ZMF Ori's that I'm also selling, lol. I just don't listen to them enough anymore.
 
Jul 12, 2018 at 5:27 PM Post #8,730 of 9,041
How much for the combo?
 

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