đŸ”¶ Fostex T50rp

Yup, just make a new thread asking for easy-to-drive headphones (with a Fiio E10K) as an upgrade to your MH752s. I’m thinking AKG K371s maybe, otherwise, I don’t know.

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Does anyone know of a good balanced mod service for T50RP? I know Modhouse has one on their website, but claim that they aren’t doing it for existing headphones. (I have Dekoni Blues, but from my understanding, they are just Dekoni’s variant of a T50RP Mk3)

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will my Fiio BTR5k be enough for these? Zeos mentions that it pushes the T60RP’s “it’s like a quarter of a watt and it shouldn’t push those but it does”. But in his review, he said that these are the most inefficient headphones ever (at least in 2016).

Yes, it will make sound on a btr5, but it’s not sound you will want to listen to for very long. The key thing in Z’s video is the T60’s are modded to run balanced. You only get “1/4 watt” balanced. So if your mkiii’s are modded balanced, then you’re good to go. If not, my experience is it sounds bad single ended.

Alright, thanks.

I can confirm 250mW of Class A power is enough for T50RPs, but with calm songs the volume pot will be at max. I’m currently listening to a rock album with my T50RPs and my SMSL sAp-1 (90$ Class A amp, 270mW). Volume at 75%.

500mW is the minimum, imo. Just to be certain. It just would be stupid to buy an amp and a calm song you like isn’t loud enough for you because they did not use compression in the studio. I’d get a xduoo xd-05 (non-plus, or the brand new “basic” with integrated bluetooth if you prefer, both have 500mW – no need for the 1 watt “plus” I think).

(
I almost screwed up and wrote “250 watts of Class A is enough”, lol. “Oof!”)

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Would not have been INcorrect. That would be plenty of power. If you bridged that Mono, Zeos might even agree it’s enough power.

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That sounds like a youtube video

“I ran 500W into my headphones, here is what happend”

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That video maker’s head:

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Do this headphone go on sale often? I want to grab a pair to modđŸ€™

I’m very interested in getting a pair of the T50rps to trial, but am worried that my current setup won’t power these properly.

Does anyone have experience powering the T50s off the ifi zen dac? (running of USB power only)

6.3mm S-BAL (SE) 230mW@32 Ohm
 I’d be surprised.
My 270mW amp can run my Fostex T50RPs
 but it’s Class A (smsl sap-1).

Otherwise I always said you need one watt for these (95% of the time they’re plugged into my JDS Atom amp, which is 1 watt, at high gain, volume at 10 o’clock :clock10: ).


Zeos said he could finally hear bass with the T50RPs? :stuck_out_tongue:

Hi, did you test the AKG K-270/ K-271 Foam Net Pieces?
I am curious if they fit the T50 and how they change the sound.

Oh well, sorry, I completely forgot about these foam pieces (I wanted to order something from Thomann, but did not).

But @MazeFrame did it, see pics here.

Also, welcome to the forum!

Thank you for the link with pictures, i searched myself but could not find pictures.
They could be a little bigger i guess.

Found two different ones for AKG, a larger version for K240:
https://www.thomann.de/de/akg_foam_net_pad_piece_k_240.htm

And a Version with a center cutout for K701:
https://www.thomann.de/de/akg_foam_net_piece_k_701.htm

There also is a Version for HD650 (DMS was mentioning it):
https://www.thomann.de/de/sennheiser_hd600_650_foam_net_pad.htm

Anyone know about running these on an Objective2 ?
Got the Drop one going to 240V, 6.5x gain, specs say 613mW at 33ohms, 355mW at 150ohms. Got no power figures for 50ohms.
No idea if it’s Class A or not.

This is looking optimistic mind you - the He4xx’s (bigger opener planars) go more than loud enough on it for me, and I found this amp-headphone pairing tool:

https://www.audiobot9000.com/match/fostex/t-50rp-mk3/with/jds-labs/objective2

https://www.audiobot9000.com/match/hifiman/he-400i/with/jds-labs/objective2

Difference in peak SPL (basically loudness yes?) is small, while the damping factor is quite a bit bigger with the Fostex’s than the Hifiman’s, which I take to be “how much it manages to not change the tuning”, and therefore a good thing.

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I’m not the only one who noticed that he has the MKIII not the MKII?

Like the one on SuperAudio best friends it’s a requested MKIII chassic with MKII internals and driver + mods. 1st owner liked sound of MKII moddy but looks of the MKIII :+1: