CHANGSTAR: Audiophile Headphone Reviews and Early 90s Style BBS

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Author Topic: correction filter PCB  (Read 5580 times)

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anetode

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Re: correction filter PCB
« Reply #20 on: December 15, 2012, 09:52:46 AM »
Put me down for two.
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Solderdude

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Re: correction filter PCB
« Reply #21 on: December 15, 2012, 03:16:54 PM »
Latest version of the article is up, you can find it on this webpage.
http://hoved-fi.dk/viewtopic.php?f=62&t=2335

More info regarding assembly and BOM lists for:
AKG K501
AKG K601
AKG K701 / K702
Audeze LCD2 / LCD2-rev2 / LCD3
Audio-Technica M50 (old & 2012 version)
Beyerdynamic DT770 Pro
Beyerdynamic DT880 (32 & 250 Ohm)
Beyerdynamic DT880 (600 Ohm)
Beyerdynamic DT990 Pro
Beyerdynamic DT1350
Beyerdynamic DT1350 (doubling as headphone amplifier)
Beyerdynamic T1
Beyerdynamic T5P
Beyerdynamic T70 / T70P
Beyerdynamic T90
Fostex T40RP-mkII / T50RP with Shure SRH840/SRH940 pads and modifications
Grado PS1000
HiFiman HE5 / HE6 / HE500
Sennheiser HD558
Sennheiser HD580 / HD600
Sennheiser HD650
Sennheiser HD800
Shure SRH-840
Shure SRH-940

Requests for making a BOM suggestion for certain headphones are welcome.
They will be added to newer versions of this article when updated.

No kits or parts will be supplied.
Payment through PayPal (or within E.U. also with IBAN/BIC)
« Last Edit: March 08, 2013, 05:54:12 AM by Solderdude »
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shipsupt

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Re: correction filter PCB
« Reply #22 on: December 15, 2012, 07:28:34 PM »
It's looking good SD!  I'm not sure what headphones I want to set the board up for because I'm not sure which dynamics I'm hanging on to!   :-Z
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ombudsmann

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Re: correction filter PCB
« Reply #23 on: December 15, 2012, 08:56:45 PM »
Hi solderdude,

I already expressed my interest, but since owning a HD 650 (newer version) and a modded T50rp, I would like to have two boards if possible.

Cheers and thanks for the effort.
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Solderdude

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Re: correction filter PCB
« Reply #24 on: January 03, 2013, 04:11:25 PM »
The PCB's are shipping.

Those having expressed an interest have been PM'd or e-mailed.
There are only 8 PCB's left available.

When all are sold I might consider another run of PCB's if there is enough demand.

€ 8.50 / PCB included shipping and when paid with PayPal.
1 € is about US$ 1.30 at this moment so around $ 11.00 / PCB

Prices are for BARE boards, you need to source the needed parts yourself.

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Solderdude

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Re: correction filter PCB
« Reply #25 on: January 12, 2013, 01:37:55 PM »
HE500-D2000/5000/7000 and some ideas to power the PCB have been added to latest pdf:

NO PCB's available, sold out

http://hoved-fi.dk/viewtopic.php?f=62&t=2335

« Last Edit: February 09, 2013, 01:29:43 PM by Solderdude »
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shipsupt

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Re: correction filter PCB
« Reply #26 on: January 12, 2013, 07:35:38 PM »
Sweeet... I need to pick a headphone to build for now!  Thanks for adding the Denon DX000 line.
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Solderdude

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Re: correction filter PCB
« Reply #27 on: February 09, 2013, 01:32:08 PM »
At this moment all PCB's are sold.
HE500 filter is confirmed.
T40/T50 filter under revision.
HD650 filter under revision.

I am contemplating another filter PCB with 2 notch sections and 2 shelving sections.
It will also have various power supply options on the PCB as well.
don't know IF and WHEN this will be available.
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Rabbit

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Re: correction filter PCB
« Reply #28 on: February 09, 2013, 02:14:00 PM »
Hi Solderdude,

What corrections have you done for the HD650 in the revised version? Really interested in one if it is similar to the one you made previously as an 'in line' connection.
« Last Edit: February 09, 2013, 02:19:33 PM by Rabbit »
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Solderdude

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Re: correction filter PCB
« Reply #29 on: February 09, 2013, 03:48:56 PM »
Quote from: Rabbit on February 09, 2013, 02:14:00 PM
Hi Solderdude,

What corrections have you done for the HD650 in the revised version? Really interested in one if it is similar to the one you made previously as an 'in line' connection.

It's quite different from the earlier attempt (several years ago) and is an active filter that goes in between a pre-amp and amp BUT the PCB can easily double as a HP amp and with a +/- 15V (or even +/- 9V battery) can drive the HD650 perfectly so no amp needed but in this case can only drive an HD650.

Not suited for any other cans but it makes the excessive warmth go away and flatten it.
You can adjust the warmth ranging from 'original' to completely flat.

Will publish measurements when it is completed (time is a limiting factor, but isn't it always ?)

No more boards available at this moment though.  :(
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