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Fostex T50RP Incremental Mods and Measurements - Page 99

post #1471 of 1477
Thread Starter 
Quote:
Originally Posted by stratocaster View Post
 

 

Here are some comparative measurements based on a purchased Mayflower T50RPs.
Graphs are those of stock T50RP,  Sennheiser HD600, Mayflower T50RP (came with (p)leather HM5 pads) and that of the Mayflower set using my own pads (StratoPads), which are modded HM5 velour pads.

 

 

 

 

These graphs (aligned at 1kHz) compare my Open T50RP StratoPad set with the closed Mayflower StratoPad version and the HD600.

 

 

Thanks for the graphs. Your T50 Closed and Open with StratoPad measurements look Great!

 

The Mayflower graph looks like it's bass heavy and probably bloats the lower mids, possibly masks some treble, too. What do you hear?

 

I don't remember if you described your StratoPads.

post #1472 of 1477
Quote:
Originally Posted by bluemonkeyflyer View Post
 

 

The Mayflower graph looks like it's bass heavy and probably bloats the lower mids, possibly masks some treble, too. What do you hear?

 

 

^ This

 

The 'StratoPad' is a modified HM5 velour pad. I guess the pictures are quite self-explanatory. Driver damping and felt-disk leakage have to be brought into balance to achieve a flat response. 

 


Edited by stratocaster - 12/14/14 at 11:40am
post #1473 of 1477
Thread Starter 
Quote:
Originally Posted by stratocaster View Post
 

 

^ This

 

The 'StratoPad' is a modified HM5 velour pad. I guess the pictures are quite self-explanatory. Driver damping and felt-disk leakage have to be brought into balance to achieve a flat response. 

 

 

Looks like open cell foam under pad cushion on the ear side and Paxmate (?) on the under-surface.

 

Thanks for sharing.

post #1474 of 1477
So the 'sock' flap that holds the donut against the baffle leaks sound?
post #1475 of 1477
Quote:
Originally Posted by stratocaster View Post
 

 

Here are some comparative measurements based on a purchased Mayflower T50RPs.
Graphs are those of stock T50RP,  Sennheiser HD600, Mayflower T50RP (came with (p)leather HM5 pads) and that of the Mayflower set using my own pads (StratoPads), which are modded HM5 velour pads.

 

 

 

 

These graphs (aligned at 1kHz) compare my Open T50RP StratoPad set with the closed Mayflower StratoPad version and the HD600.

 

 

 

Which mayflowers are those? The V1s, V2s and V3s are all very different. (I have the V1s)

post #1476 of 1477
Quote:
Originally Posted by bluemonkeyflyer View Post
 

 

Looks like open cell foam under pad cushion on the ear side and Paxmate (?) on the under-surface.

 

Thanks for sharing.

 

It is just a felt ring on the underside of the pad (allowing some leakage that flattens out the bass) and some open-cell foam (the white stuff in the pic) under the pad (flattens the highs to some degree). That's all. When there is too much treble energy for your taste, you can put some (rather dense) open-cell foam in the pad, earside. So the highs become really smooth.

 

Be aware that this works best with the HM5 velours. The HM5 pleather pads can function as StratoPads, but the highs are peakier than with the velours. The velours are simply perfect for this.

 

 

 

Quote:
Originally Posted by c61746961 View Post

So the 'sock' flap that holds the donut against the baffle leaks sound?

 

The sock flap is just there to hold the pad in place. You can't use leather or similar because some sound has to leak through the felt ring and the sock.

 

Quote:
Originally Posted by SeEnCreaTive View Post
 

 

 

Which mayflowers are those? The V1s, V2s and V3s are all very different. (I have the V1s)

 

The seller said it was a V2 (comes with a velour pad) but it has the (p)leather HM5 pads of the V3. Anyway, I also measured it with stock HM5 velour pads, which resulted in a somewhat flatter FR, similar to the measurements of the V2 on Innerfidelity.


Edited by stratocaster - 12/14/14 at 10:07pm
post #1477 of 1477
Quote:
Originally Posted by stratocaster View Post
 

 

 

 

The seller said it was a V2 (comes with a velour pad) but it has the (p)leather HM5 pads of the V3. Anyway, I also measured it with stock HM5 velour pads, which resulted in a somewhat flatter FR, similar to the measurements of the V2 on Innerfidelity.

 

 

Yeah, I thought so, V1s are the basic slue of mods, just with completely open bass ports, so ever ever so slight bass emphasis  (of course at low volumes this is ideal) V2s are "analytical" with that flatter response, and the V3s are "ermehgerd all dat rumble bass"

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