Quite different...... S are (don't know why) easier to' drive with powerful bass but little less detail and hairness..... With my Bacillus Tilla I like more the HD800 but with the microZOTL 2 and the Bryston I think the 800S are the right choice.

Bedroom setup Living room setup

Thanks Joe, PM sent.

Hi! I'll be happy to join the test Group. Headphones you possess: Sennheiser hd800 Sennheiser hd650 Sennheiser Momentum Audeze LCD 2.2 Grado sr325is Beats by dr Dre Wireless DAP (s) you possess: Iphone 4s Iphone 5 Ipad Air Fiio X5 Fiio products you possess: FiiO X5 Fiio E12 DIY...

If you really want to push the 325 to the limit I strongly suggest you to invest a little bit more and buy a Fiio E12 DIY using lme49000 as buffer and Muses02 as opa. I own this combo and I can assure you this is by far the best portable amp. Money can buy for the 325is. Fantastic soundstage...

:wink: Thank You. Will go with Muses01 first.

May I ask you which is in your opinion the right op amp, I am waiting for my Brown Dog adapters to came and hoping my soldering skills are not completely gone I will have the 5002 ready to rock in the next few days. I have Muses01 and 02, opa 627 and, of course, the stock ones.

Which is the buffer You have currently installed? My combo is Muses02 with lme49006. With Muses01 I have Less punch and detail together with narrower soundstage.

  I think it has something to do with headphone pairing.........(it might sound strange because the sr325Is are well known for their "bright sound signature" but for some strange reason I can't find a single bit of harshness with tis combo) what it is really amazing is the quantity of musical...

You're absolutely right! Great soundstage and incredible detail. Still on the warm Side But with plenty of detail. I am really amazed with this combo with the Grado!!

Lucky me! I can put my dip8 chips into the e12 diy case without problems. Just switched from standard config. to muses02 and LME49600 :fearful::fearful::fearful: What a HUGE difference! Now the DIY is a totally different beast if compared to the standard E12. My Grado SR325iS sounds like they...