CHANGSTAR: Audiophile Headphone Reviews and Early 90s Style BBS

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Author Topic: Koss KSC75 Frequency Response and CSD Waterfall Plots  (Read 22697 times)

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Anaxilus.

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Re: Koss KSC-75 Frequency Response and CSD Waterfall Plots
« Reply #20 on: May 08, 2012, 07:05:58 AM »

Welcome!  Nice first post.
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Marvey

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Re: Koss KSC-75 Frequency Response and CSD Waterfall Plots
« Reply #21 on: May 08, 2012, 07:07:58 AM »

+25 karma points
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thefoundMIDrange

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Re: Koss KSC-75 Frequency Response and CSD Waterfall Plots
« Reply #22 on: May 08, 2012, 07:58:52 AM »

25 sounds like alot but i'll take 'em..............I need all the karma pts I can get. I've done alotta wrong in my life.
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stratocaster

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Re: Koss KSC-75 Frequency Response and CSD Waterfall Plots
« Reply #23 on: May 08, 2012, 09:26:21 AM »

Just to let you know what I have been working on to give the ksc-75 a nice housing. I have given this baby the name stratoKOSSter. It is a closed can , and as lostMID has pointed out, has great potential. There is the possibility to try some venting as the hole in the middle can be pierced. But I have not found the necessity to do.
The cups are lined with Paxmate and filled with cotton to finetune the driver performance and reduce standing waves. All in all, this is just a fun sounding headphone, great balance, no Gradoesque 2kHz shout, yet forward sounding with nice bass backup and high end sparkle. I'm loving it.
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grev

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Re: Koss KSC-75 Frequency Response and CSD Waterfall Plots
« Reply #24 on: May 08, 2012, 10:35:38 AM »

I know of both stratocaste and theMIDrange from the grado/alessandro mod threads that I post over at HF, welcome, dudes!
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Questhate

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Re: Koss KSC-75 Frequency Response and CSD Waterfall Plots
« Reply #25 on: May 08, 2012, 11:22:36 PM »

Yes, welcome aboard, MID and Strat!

Looking forward to reading about the results to your KSC modding. I know MID is gonna try every single wood in every single configuration with every single finish to get what he wants  ;D
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ocswing

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Re: Koss KSC-75 Frequency Response and CSD Waterfall Plots
« Reply #26 on: May 09, 2012, 12:06:31 AM »

Just to let you know what I have been working on to give the ksc-75 a nice housing. I have given this baby the name stratoKOSSter. It is a closed can , and as lostMID has pointed out, has great potential. There is the possibility to try some venting as the hole in the middle can be pierced. But I have not found the necessity to do.
The cups are lined with Paxmate and filled with cotton to finetune the driver performance and reduce standing waves. All in all, this is just a fun sounding headphone, great balance, no Gradoesque 2kHz shout, yet forward sounding with nice bass backup and high end sparkle. I'm loving it.

That's pretty awesome. You should send it in to get measured!
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"I find it hard to believe the Nazis conquered Europe w/ just treble peaks. - Anaxilus

thefoundMIDrange

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Re: Koss KSC-75 Frequency Response and CSD Waterfall Plots
« Reply #27 on: May 09, 2012, 03:55:29 AM »




strat is in austria so the logistics prohibit sending it to montana....I may send mine in at some point, I can't imagine that it would not measure nicely. Still dialing it in though, here's a shot in it's current state. totally closed with some light cotton inside and a type of rubberized paint sprayed on the walls. reverse bowl pads. What I'm finding is the pads (distance from the ear) and the inner treatment is tough to balance out. Also, when using stock bowl pads, the closed ends do not work nearly as well and things seem to get thin and tinny like grados do, but when using reverse bowls or just the stock koss pads, the driver is closer to the ear, bass comes way up and then it benefits from being totally enclosed. Then it's a matter of finding how to deal with the inside. There are some qualities I like when no damping or cotton is used but trying to balance everything out when I have zero knowledge about acoustics or headphone desingn is tough. But the pads really are key and dramatically change things. All in all I still like the stock headphone just fine. The modded set is an attempt to improve on the three slight shortcomings that I hear in the stock set, which are a little heavy and unrealistic on the trebles, a touch too airy through the mids at times, and a little too lean through the low mids. So far, the modded set has definitely moved all of those issues in the right direction and is a cool alternative to the stock sound
« Last Edit: May 09, 2012, 06:15:23 AM by thelostMIDrange »
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stratocaster

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Re: Koss KSC-75 Frequency Response and CSD Waterfall Plots
« Reply #28 on: May 09, 2012, 01:22:32 PM »

Try cheap pleather pads of the right diameter. You can find fitting ones from cheap headsets offered in computer stores or similar. That will dramatically change the sound. They are not perfect but give you an idea what nice leather pads could do.
I absolutely love the sound these produce with the L-cushs I lined with lambskin leather. You see the cushs in the pic.
Those pads are absolutely comfortable and truly magnificent sounding with the enclosed Koss.
 
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thefoundMIDrange

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Re: Koss KSC-75 Frequency Response and CSD Waterfall Plots
« Reply #29 on: May 10, 2012, 12:25:33 AM »

maybe you could take a pic of the pad so I can see how thick the pad is. In other words, I'd like to come to know where the driver is when listening. Is it right on the ear or spaced off. I'd like to try and simulate what you have going on but without getting the driver right where you have it, I won't be able to hear what you have got. the slightest change in where the driver sits changes everything as you know. ......also, you seem to be suggesting that the material and perhaps the way the pad slopes away from the driver is affecting things? If so, A couple clear closeup pics would help here too..........
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