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Old 26th May 2009, 04:39 AM   #31
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Hi J,

How is your project going?

Wachara C.
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Old 26th May 2009, 08:35 AM   #32
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Okay , here is the tweak that removes the peaky highs from the Lambda Pro:

You need a self adhesive plastic tape, the kind that is used for isolation is good, 17mm x 45mm.

Take a sheet of 2mm foam, the kind that is used in front of the drivers of headphones, cut out a piece that fits in front of the driver but is a bit larger so that it will be fixed by the ear pad.
Attach the tape in the middle of the foam, following its shape so that it looks like it is a oval ring radiator.
Put the foam in front of the driver with the tape towards the driver.
No need to disassemble the headphone.

Together with the SRM1 mkII pro amp it sounds very good now.

Please report back here if you try it.

I have another tweak, later...
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Old 27th May 2009, 06:28 PM   #33
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I should have a Lambda Pro in a drawer somewhere (lacking an arc) so I'll have to try that one day. I do concur that damping the front of the Lambda drivers is the way to go since you can only go so far damping the back. FYI here is a picture of a SR-404 I modded:

Click the image to open in full size.
The blue and white material you can see in the right hand corner, inside the earpads, is a type of fiber paper which serves as the inner damping layer. I used two layers which fit neatly in the pocket on these new earpads. The bright blue stuff is synthetic felt. Next project will be the brand new 30th Anniversary Limited Edition SR-404 of which Stax will only make 1000 numbered units.
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Old 27th May 2009, 06:49 PM   #34
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Stax made a diffuse field eq. for the Lambda Pro.
I think it was something like the ED-1? I remembered
it did get rid of the peaky highs.
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Old 27th May 2009, 10:42 PM   #35
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Quote:
Originally posted by spritzer
I should have a Lambda Pro in a drawer somewhere (lacking an arc) so I'll have to try that one day. I do concur that damping the front of the Lambda drivers is the way to go since you can only go so far damping the back. FYI here is a picture of a SR-404 I modded:

Click the image to open in full size.
The blue and white material you can see in the right hand corner, inside the earpads, is a type of fiber paper which serves as the inner damping layer. I used two layers which fit neatly in the pocket on these new earpads. The bright blue stuff is synthetic felt. Next project will be the brand new 30th Anniversary Limited Edition SR-404 of which Stax will only make 1000 numbered units.
On the backside I have only loose silk for damping and thin foam sheets for dust blocking, every second plastic bar is removed on the housing to reduce reflections.

Try a strip of plastic tape on your blue/white sheets...
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Old 2nd June 2009, 05:00 PM   #36
WrineX is offline WrineX  Netherlands
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shocked many times with solosound electrostatics, 5.5 Kv, but theres a resistor so nothing exciting happened, appart from me trowing stuf around out of reflex, or ripping the wire i wanted to solder. and loads of cursing ofcourse.
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