solderdude
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Post by solderdude on Aug 31, 2015 20:50:54 GMT
Very, very different.
And to make matters worse for the HD650 it makes a LOT of difference whether one uses older (softer) pads or a set of fresh pads.
Currently measuring the daylight out of most 'audiophile approved' mods and am finding that the guys who designed the HD650 aren't anywhere near as stupid as a lot of 'going by ear' modders think they are.
Lots of tests to be done yet and then make an article about it that's understandable.
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Rabbit
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Post by Rabbit on Aug 31, 2015 21:19:59 GMT
Simon, the Senn has new pads.
With a filter, it's beautiful.
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oldson
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Post by oldson on Sept 1, 2015 19:07:57 GMT
Simon, the Senn has new pads. With a filter, it's beautiful. i will have to get a filter at some point. it would be madness not to. it may not happen before year end though. (unless Mum's house sells quickly). i am not in any hurry, and the deal on your senn's Ian was too good to miss. who knows , when i try the filtered 650 i may prefer it and sell the lcd2!?!? for me the only drawback on the lcd2 is the clamping force can sometimes be a bit too much, ie when i have a sinus headache. my guess is , i will keep both.  |
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oldson
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Post by oldson on Sept 1, 2015 19:27:49 GMT
Very, very different. And to make matters worse for the HD650 it makes a LOT of difference whether one uses older (softer) pads or a set of fresh pads. Currently measuring the daylight out of most 'audiophile approved' mods and am finding that the guys who designed the HD650 aren't anywhere near as stupid as a lot of 'going by ear' modders think they are. Lots of tests to be done yet and then make an article about it that's understandable. thanks Frans i will be looking to build a filter, but not for a little while yet. (hopefully with yours and Javier's help, again) next month i will have to pay out around £400 on having my aquarium re-scaped  . that is over 2 months spending money for my hobbies. maybe i should not have bought the car but hey........we are a long time dead!!! cheers mate |
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Post by luckbad on Sept 6, 2015 21:10:19 GMT
Holy crap, this is awesome! This is going to be the first real project I work toward as I learn DIY audio (or the passive attenuator because I use a lot of IEMs).
I want to take ~5500Hz down a notch on my Fostex TH600 without software EQ, and I'd love to be able to knock the treble down in general a few dB.
It would also be awesome to make a sub-bass boost board that satisfies my basshead tendencies.
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solderdude
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Post by solderdude on Sept 6, 2015 21:54:57 GMT
The 5500 Hz could possibly be removed with a passive filter that goes in line with the headphone (in a small extension cable)
Very easy to make.
The filter board can be used to create sub-bass boost filters as well.
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Post by luckbad on Sept 7, 2015 3:50:03 GMT
The 5500 Hz could possibly be removed with a passive filter that goes in line with the headphone (in a small extension cable) Very easy to make. The filter board can be used to create sub-bass boost filters as well. Awesome. I'll bug you about how to do the 5500 Hz cable after I get my feet wet. This is my new favorite forum. Thanks! |
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Post by videoguy on Dec 13, 2015 5:12:19 GMT
HiFrans: I built the filter board for Fostex T50RP's. The sound is excellent. I did use the LME49860 dual op amp's on the board. This chip is exactly the same spec as the LM4562; the only difference being its maximum operating voltage is +-22vdc. I have installed a stereo phone jack on the rear apron of my SCHA amplifier in order to power it from the amplifiers power supply. I'm operating the amplifier on +-22vdc; a big improvement in sound quality over the original +-15vdc.
I followed your modding directions for the T50's. I already had 2.3mm thick felt on hand & fastened it with Rubber Cement; works well. From what I had read on modding the T50's, I expected to really notice a loss of the top end above 10khz but they sounded better than expected, before adding the filter board. Really like the low bass extension & the top end lift given by the filter. Thank you Frans.
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solderdude
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Post by solderdude on Dec 13, 2015 8:34:03 GMT
The T50RP really benefits from the mods + filter.
Top end extension and bass extension as well as clarity improves.
To me it becomes a totally different headphone.
I still use it sometimes (have 2 of these Fostexes) but lately only the Philips and HD800 (on Kameleon) get ear time.
The LM4562 performed optimally between +/- 12V to +/- 17V with the 'standard' +/-15V right in the middle.
The LM49860 is most suited for voltage above 15V but (alas) doesn't reach +/-24V...
For those wanting to try the filterboard as well (or build the SeNNator) are in for a disappointment.
All boards are sold and won't be making new boards.
When Jeremy doesn't have time to make a Kameleon 'pre-amp' I plan on making one myself in the Kameleon enclosure.
Will also be line level (like the filterboard) and defeatable but will Kameleon modules and possibly a crossfeed module.
Need to finish building and the desktop amp first though and make manuals for them.
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oldson
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Post by oldson on Jan 22, 2016 17:51:01 GMT
guys,
just wondering if you could recommend foobar EQ settings to closely replicate a filter for my hd650.
just curious to get an idea of the improvements.
cheers
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Rabbit
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Post by Rabbit on Jan 22, 2016 18:12:05 GMT
Gordon tried this and found it hard to do I think.
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Post by techboy on Jan 22, 2016 18:20:48 GMT
Maybe you could use Sonarworks too oldson.
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Deleted
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Post by Deleted on Jan 23, 2016 9:06:06 GMT
guys, just wondering if you could recommend foobar EQ settings to closely replicate a filter for my hd650. just curious to get an idea of the improvements. cheers It's been a long time since I used Foobar and never with the HD 650. You'll need a parametric EQ to make a half-decent job of it but you probably still won't get close to the goodness of the Sonarworks plug-in. It really is that good. |
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Post by techboy on Jan 23, 2016 13:21:28 GMT
Sonarworks has a free trial. Or you can also try Accudio on iOS.
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Rabbit
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Post by Rabbit on Jan 23, 2016 13:28:20 GMT
guys, just wondering if you could recommend foobar EQ settings to closely replicate a filter for my hd650. just curious to get an idea of the improvements. cheers The problem is getting the 'width' of adjustment correct as well as the actual frequency itself. Frans is an expert at getting it pretty close though, so you could try, but it might be a little bit crude, Simon. I couldn't replicate the Kameleon with it here in front of me when I had it sent to try from Frans. It has a subtle kind of effect that is only noticeable when you hit certain frequencies. Nothing is dramatic, but as a whole, you begin to realise that something is way better. For me, the instant change that I noticed was the depth of bass and that was purely by chance because of what I was listening to. Then I realised the hump in the mid bass wasn't there. Finally, I felt that it was just more opaque sounding and I think I even asked Frans about any changes in the treble at the time. He replied that there weren't any, but the changes below change your perceptions of the top end. It's been there all of the time!! That's why I always say that there is no veil. It's to do with what's going on below that affects what you hear above. Strange thing really .... |
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