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Just listened to some Fostex T50RPs today... WOW! - Page 690

post #10336 of 10570

Yea, the T50rp really does improve with very simple mods. Mine are modded pretty closely to yours actually, minus being balanced. I also used a piece of stiffened craft felt right behind the driver and I am using the Alpha pads. Another thing that can make a huge difference is tuning the bass venting. Covering the outside 4 semi-open slots with masking tape, then trying vents of varying sizes will really dial in the bass quantity and quality. I'd try sealing it completely, then start with a single hole the size of a needle and keep making the hole bigger until you get the desired effect. Right now I am using a single hole in each side the size of the tip of a ballpoint pen. Good bass speed with just the right amount of bass quantity and impact. Of course every single mod will vary depending on each and every other single mod, the possibilities are endless.    

Quote:
Originally Posted by robrob View Post

I recently picked up a new set of T50RP headphones and tried them with the stock and Shure 840 ear pads. I was hoping the ear pads would be enough of an improvement I'd be happy with the sound. I wasn't. I like the monitor-like neutrality of my AKG K240 Studio phones but I just did not like the T50RPs at all so I decided to do some of the standard mods. I was pretty skeptical that simple mods would improve the sound quality of the T50RP.

 

I added a male 4-pin Mini XLR socket and wired the drivers for balanced operation. I built a cable using Canare Star Quad cable with a female 4-pin Mini XLR on one end and a male 4-pin full size XLR on the other and made an XLR to 3.5mm plug adapter for single ended ops. I filled the headphone baffles with generic modeling clay, lined the cups with self-adhesive felt (two layers where everyone puts the sound deadening material), covered the driver's central square with magazine paper held in place with one full length of spore tape and added 6 cotton balls per side.

 

All I can say is wow. It's pretty amazing what even my lazy man mods do to these headphones--and I'm using them with a single ended adapter cable so the sound improvement isn't from switching to balanced output (but a Schiit Mjolinir is on the way). Right now I'm using an Aune T1 DAC/AMP to drive the phones. I've been going back and forth between the T50RPs and the K240 Studios and I'm shocked to find I prefer the modded T50RPs.

 

Now to mod the K240s for balanced operation and make an XLR to banana plug adapter so I can try the headphones with my receivers' speaker outputs.

post #10337 of 10570

Jason, I do plan to play with the bass vents starting with fully blocked and then slowly opening them up to find what I prefer but I'm already very happy with the sq.

post #10338 of 10570

when you decide to play with venting it also helps to seal off the cups everywhere else as well, like where the jack is, and where the wires go through at the top of the cups. This way, the only venting will be the venting that you create. 

Quote:
Originally Posted by robrob View Post

Jason, I do plan to play with the bass vents starting with fully blocked and then slowly opening them up to find what I prefer but I'm already very happy with the sq.

post #10339 of 10570

Here's a couple of pics of the balanced line mod. Soldering those tiny Mini XLR connectors are a pain in the butt.

 

 

 

 


Edited by robrob - 8/12/13 at 8:51am
post #10340 of 10570

A good quality "3rd hand" is really useful.  It's easy to solder with a cable clips and a big fat magnifying glass.  If you do this a lot avoid the $10 ones from Amazon.  Radio Shack has a great one, I think it's about $70, but worth it for anyone doing more frequent detail work.

post #10341 of 10570

I bought a $5 helping hand once. That thing has probably hampered me more than anything, and I've had better luck just using a set of vice grips to carefully hold things in place.

post #10342 of 10570
Quote:
Originally Posted by Armaegis View Post

I bought a $5 helping hand once. That thing has probably hampered me more than anything, and I've had better luck just using a set of vice grips to carefully hold things in place.

I bought one with alligator clips, soldering iron holder, and magnifier with LED. The components are "held in place" with wing nuts. It's impossible to tighten the wing nuts enough to hold. This is a POS. I use the magnifying glass, though, and took the gator clips off to use as soldering heat sinks.

 

I bought a "Panavise 209 vacuum base pv junior" that works great so I ordered another one from Amazon.

post #10343 of 10570

It's been a long time since my first mod and to this thread.  It seems some are using "stiff felt" on the driver with small holes".  

What's the benefit or affect?

And why the holes in the "felt" and what do you make it with?  

And what kind kind of tape do you use to tape the felt?  Any tape?  

 

thanks much

post #10344 of 10570

This is the one we use for our workstations.

 

http://www.amazon.com/Helping-Hand-Magnifier-Solder-Holder/dp/B00B88B67E/ref=sr_1_2?s=power-hand-tools&ie=UTF8&qid=1376589663&sr=1-2&keywords=helping+hand

 

It's got a nice bright LED built into the magnifier.  If you do regular detailed solder work I've not found a better station (except for vintage ones).  Triple clips is really useful, too.

post #10345 of 10570
Quote:
Originally Posted by mrspeakers View Post

This is the one we use for our workstations.

 

http://www.amazon.com/Helping-Hand-Magnifier-Solder-Holder/dp/B00B88B67E/ref=sr_1_2?s=power-hand-tools&ie=UTF8&qid=1376589663&sr=1-2&keywords=helping+hand

 

It's got a nice bright LED built into the magnifier.  If you do regular detailed solder work I've not found a better station (except for vintage ones).  Triple clips is really useful, too.

That is high class tongue_smile.gif.  Ya I have the $5 one and honestly it helps...sometimes but it is a pain about 90% of the time. But I also don't have clamps so I guess I have to make due with what I have. 

post #10346 of 10570

I have a $6 third hand. PIA, but it does let me get things done that I wouldn't be able to do otherwise. (And, let's be honest, that $6 device isn't the cause of most of my futzing around and botch jobs.) 

post #10347 of 10570

For $6 I got a silicon cookie sheet that I do all my soldering on. Cleans up easily, prevents my PCB's from sliding around, no worries about burning the table, and all the miscellaneous little screws and components tend to stay in place a bit better rather than roll around. That's $6 well spent. 

post #10348 of 10570

Just finished my T50RP woodie, using custom black and white ebony cups, Brainwavz HM5 pads and Fischer FA-011 headband. I can run them closed or open. Prefer them open with the damping kept rather tight.

 

 

 

post #10349 of 10570

Those look fantastic! Would love to hear them.

post #10350 of 10570
Quote:
Originally Posted by stratocaster View Post

Just finished my T50RP woodie, using custom black and white ebony cups, Brainwavz HM5 pads and Fischer FA-011 headband. I can run them closed or open. Prefer them open with the damping kept rather tight.

 

 

 

I have to say, extremely impressive build and concept!

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