Fostex T50RP - Mod Kit


Product Information

Our Fostex modification kit gives you the necessary materials to perform most modifications to your set of headphones.

  • Please note that the baffle cover upgrades are made from a die cut machine and match perfectly to the Mk3 baffles.

  • Includes:
    • Roughly 25 grams of Newplast Clay
    • Stick on soft and stiff felt
    • SilverStone Dampening Foam
    • Rolled Cotton
    This mod kit will work on all version of the Fostex Mk2 and Mk3 series of headphones. With the Mk3 headphones we have a material upgrade for the inner baffle foam. With our testing we have found our material provides a boost in sound quality and is easily installed.

    See our YouTube video on our modification guide here –
  • Mod Kit Printout: Here
  • Current Stock:
    Weight: 0.63 LBS
    SKU: 0005

    Customer Reviews 5 (8 Reviews) Write a review of this product

    4 Stars
    Just what you need to start modding your T50RP's

    I got a pair of T50RP's for a ridiculous price and saw the potential they had. Original pads, garbage. I got some Brainwaves Hybrid XL's and that was a dramatic improvement as it curbed the highs and gave some better bass definition. I then modded the input to a 4pin Mini XLR so I could run them in balanced mode. Also, another big improvement. However, I will note that the mods made the T50RP's about another 20-30% less efficient. Thankfully I have the Schitt Lyr and the SMSL SP200 which almost more power than any headphone should ever need. So I got this kit to see what else I could do to the sound. Early verdicts are is that this mod kit really accentuates the high end, but it also widens the sound stage, drops a bit of base for better clarity and in general brings out the fine details. I'm no longer hearing the speaker housing vibrate during strong bass sequences, which is very nice. Amplifier's "Into the Space Age" has some really intense bass for a rock song. When modded right, the T50RP's can give my Audeze LCD-XC's a run for their money on bass slam. First thing, if you are sensitive to bright headphones, don't put the felt on the back of the driver, that was just treble overkill. Even without it, I still get a lot of sibilance, so I need to tweak that a bit more. While the details are much improved and the imaging has expanded almost exponentially, the sibilance in Steely Dan's "Jack of Speed" is pretty noticeable. Same for Dredg's "Same 'Ol Road" which is a great test for stereo imaging and soundstage. It sounds incredibly wide and deep, but with that sibilance becoming almost overbearing. All in all, it's a nice little tweaker's kit. But like most anything, you'll need to do a little dialing in to suit your personal tastes. While I like forward treble, I can't stand sibilance. That's by no means a fault of the mod kit, all the materials are there, but Mayflower could add a bit more info about 'tuning to taste' since no one mod is perfect for all people.

    3 Stars
    fostex t50rp mod kit

    Did mod as per video. Headphones were unalienable without heavy eq with treble reduction and bass boost. I don't need to do that on other headphones so it's not just my ears. I emailed mayflower and they said I installed the mod wrong and to send pictures. I sent pictures with no response. I read into it and others said adding material to back of driver causes treble reflection. I removed the felt on the drivers and they were listenable again. It was fun to mess around with them but not sure if it was worth the money to ship to Canada. I think I might just be missing something but I did everything as per video. Evan - I tried contacting you to help you out but didn't get a response...this is a DIY kit afterall so we can only do so much to help...

    5 Stars
    makes modding easy

    It does exactly whats it says. Plenty of supplies to get the sound your looking for from the T50RP

    5 Stars
    T50RP mod 1

    I wasted a lot of time wondering whether or not to do this mod. I also wasted time with trying to find local materials and trying step mods I had seen on the internet. Don't waste your this mod kit and get your T50RP's sounding right. I did love them stock but this kit brought out all the good. Way more enjoyable. Absolutely add the pads. Stock pads do not do this kit justice. I did the baffle kit for my mkiii's. I followed their video on YouTube and was done in about an hour. Only thing I had to play with was the amount of cotton......which ended up just about none for me. I'm very happy with these cans now....very lively!

    5 Stars
    Great kit

    Awesome kit to improve the sound of your T50RPs, While the Youtube video is easy to follow, the only thing I wish they included in the mod kit is a size diagram for the cut out felt pieces. They show them in the beginning of the video, but as to what size exactly and what shape to cut the pieces, is up to you to figure out through trial and error. So even just a simple crudely drawn diagram/outline of the pieces to cut that can be copied and included in each kit would be great for future customers to take the guess work out of the mod. regardless of this, it's an excellent mod kit and they do include enough extra felt for if you do make a mistake and cut a piece too small or incorrectly, to try again.

    5 Stars
    T50 mod

    Great price to start modding your mk3's. they provide you a lot of excess materials which is nice if you mess up. I did my mod based on the youtube video mayflower did. Although, modding around the cups is great, but the mods on the driver is complete trash (lost all bass). did a lot of experimentation to get the bass back, but that's the fun of modding. A lot of trial and error makes modding so fun. Highly recommend of you're interested in modding

    5 Stars
    Great kit really makes a huge difference and leaves the guess work out.

    This kit is amazing. I have been on headfi looking around for the instructions but they are very lackluster. If you have a pair of t50,t40,t20's and want to mod the drivers get this kit and do each mod 1 at a time to get a feel for the changes and fine tune it based on what you find to suit your taste. Thank You for making this kit Mayflower it has helped out a lot!

    5 Stars
    Extremely worthwhile modification.

    Hi, Just wanted to leave a quick note of thanks to Mayflower Electronics for this mod kit. I followed the directions from the YouTube link provided and completed the mod in about 3 hours time. The YouTube video shows the process step by step and nothing was too complicated. The results are very much worth all of the effort. Sound is subjective but everything sounds so much cleaner and clearer after the mod. Everything in this mod kit is reversible but once you install it you won't want to change back guaranteed. :) All 5 out of 5 stars given for the mod and for Mayflower making the process so easy.