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MiuAudio MRA DIY Headphone amp - Page 2

post #16 of 34

looks cozy ! cool.gif

post #17 of 34
Thread Starter 

Interested friends can visit this site: http://www.miustore.com/

post #18 of 34

ordered!

post #19 of 34
Thread Starter 

Thank you! Goods will be sent as soon as possible.

post #20 of 34
how is the SQ ??
post #21 of 34

I have ordered, too!cool.gif  Ready to enjoy it with my UE10pro, and may be OPA627BP.

post #22 of 34

I should be receiving my unit sometime before the weekend and will be building it over the weekend, i'll let u guys know how it goes.

post #23 of 34
Thread Starter 

Please note that orders have friends, goods have begun to send.

IMAG0106.jpg

 

post #24 of 34

just got mine @ the office!

post #25 of 34

mra.jpg

 

It works! and I seriously need to get a glue gun to make sure some stuff dont touch inside lol I do have slight issues with the gain switch though, the rear plate doesnt let the switch move to its proper hi gain position it seems :(

post #26 of 34

so how does it sound? How long does the batteries last?

post #27 of 34
Quote:
Originally Posted by DarknightDK View Post

so how does it sound? How long does the batteries last?


With my IE8:

It's not hissing which is a good sign :)

It seems to have slightly less bass than my govibe magnum (@ 0 bass)

doesnt feel as wide and doesnt go as high note. 

The instruments are a bit further back with vocals up front. Can't hear as much small details.

 

With my HD600:

300ohms is too much for it to handle at low gain.On high gain... lack of bass prob from the lack of power. Vocals are up front and a bit too high pitched.  

 

The interconnect I am using is a DIY LOD with rectangular solid core copper wires which may not exactly be the best reference interconnect cuz it pulls the soundstage quite far

 

Overall, quite a good amp for its price! and quite fun to build too. my magnum costed 5~ times as much LOL

I don't recommend driving 300ohms on it though. It actually have a bit more oomph than my magnum on high gain but it doesnt sound right when i compare it to my PA-10 stationary amp

and hopefully im doing my "review" right hehe

 

as for batteries, don't know yet, running on alkaline 9v, only used it for an hr or 2 so far

 

post #28 of 34

Can anyone confirm whether Kyoshiro's problem with the rear plate is a random problem or an issue that is present in all kits?

 

@Kyoshiro: are you sure you didn't just solder them too high or something?

post #29 of 34
Quote:
Originally Posted by IMAWolf View Post

Can anyone confirm whether Kyoshiro's problem with the rear plate is a random problem or an issue that is present in all kits?

 

@Kyoshiro: are you sure you didn't just solder them too high or something?



nope didnt solder too high, it works fine now after some slight adjustments and making sure that the backplate isnt touching the switch.

but yeah the switch has to sit flat on the pcb or else there isnt enough clearance and gotta make sure the pcb board doesnt flex upwards because that too will make the switch touch the top of the gain hole

post #30 of 34
Thread Starter 

MRA can be used to debug a different op amp to match your favorite sound.

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