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Author Topic: Bill-p HE-560 mod  (Read 11836 times)

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Bill-p

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Re: HE-560 mod
« Reply #30 on: January 10, 2015, 08:25:17 PM »

Ah, it's fine, guys. I'm not in a hurry.

Thanks for doing this, either way. I'd love to see the delta between the original and modded pair.
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Bill-p

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Re: HE-560 mod
« Reply #31 on: January 22, 2015, 11:26:32 PM »

Any update on this, marvey?
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Marvey

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Re: HE-560 mod
« Reply #32 on: January 23, 2015, 12:06:00 AM »

Very soon. Possibly tonight. Busy season for my line of work right now.
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Bill-p

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Re: HE-560 mod
« Reply #33 on: January 23, 2015, 12:17:58 AM »

Oh, okay. No worries, and no rush either. I just wanted to know where we are.

Thanks!
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Marvey

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Re: HE-560 mod
« Reply #34 on: January 26, 2015, 06:59:45 AM »

Pre-mod measurements - for a baseline. PM me your addy.

1st set (regular prod pads)
2nd set (focus-A pads)

Focus-A pads are definitely less bright.

It was been speculated that maybe the Focus-A pads are less bright because of distance to the ear. This turns out not to be true based on when the impulse response hits (graphs not pictured). Both prod and Focus-A pads maintain same distance to ear.
« Last Edit: February 04, 2015, 03:35:17 AM by marvey »
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TMRaven

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Re: Bill-p HE-560 mod
« Reply #35 on: January 26, 2015, 02:13:01 PM »

Damn, wonder if Hifiman more recently tuned their 560s to have 3-4more db in the mid-treble. 
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Marvey

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Re: Bill-p HE-560 mod
« Reply #36 on: January 26, 2015, 05:15:12 PM »

You noticed...  could be some product variation, hence the differing opinions.
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Clemmaster

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Re: Bill-p HE-560 mod
« Reply #37 on: January 26, 2015, 06:03:45 PM »

That could explain why I never cared for my production HE-560...
I liked Jason's pair at the last meet, but it was on a system I'm not familiar with.

No production HE-560 I heard could touch the pre-production I brought in May last year, though. YMMV.
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Hands

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Re: Bill-p HE-560 mod
« Reply #38 on: January 26, 2015, 06:32:23 PM »

That does make me wonder about the particular pair I tested...
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Bill-p

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Re: Bill-p HE-560 mod
« Reply #39 on: January 26, 2015, 08:17:02 PM »

Cool... Thanks, marv. I sent you my addy.

Will get these back to you in a few days and start writing the guide. The mod is actually fairly minimal.

Kind of interesting what's going on with the mid treble. I suspect that's related to the metal ear pad retaining ring... though I'm not sure the ring should make that much of a difference.
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