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Matrix M-Stage amp review: simple, cheap, and excellent. - Page 236

post #3526 of 4838
Quote:
Originally Posted by jc89 View Post

about the unbalance... it's completely due to my noobiness and carelessness...

 

I didn't realize that the two sets of gain controls are controlling left and right channels separately... I thought they are for input 1 and input 2 separately.

 

I'm confused by this design though... Why would anyone want to have different volumes coming out from left and right sides?

Are there any technical reason for this design? 

 

 

Thanks!

 

 

Quote:
Originally Posted by hifimanrookie View Post


I dont know also...maybe just a joke of the designer?..but check my amp..its even worse!..i even have two volume knobs, two on-off switches and even two power cables..lolz.. biggrin.gif

 

 

Quote:
Originally Posted by Chris J View Post

 

Nobody wants two different volumes from left and right!  wink_face.gif

They would have to use a more expensive switch than the little switches you see on the bottom of the M Stage.

So you could say it keeps the costs down.

Most people set gain to 10 dB with Q701 and leave it there.....forever.

 

I just compared 5 different phone pre-amps, they all have that funny feature: separate switches for left and right.

It's even worse, because you can adjust:

input resistance

input capacitance

pre-amp gain

subsonice filter

but all switches are separate for left and right! 

But once you set the switches the way you want them, you never change them unless you change to another phono cartridge.

 

Seems to be  mark of passage for M Stage owners, they all need to mix up gain settings.

  beerchug.gif

 

 

As far as headphones go, it's mostly for people with differing levels of hearing between their ears.  For example, I'd say I have maybe 85% hearing with my left ear compared to my right.  All I have to do is adjust the balance a bit towards the left speaker and voila my hearing is magically fixed biggrin.gif

post #3527 of 4838
Quote:
Originally Posted by Wild View Post






As far as headphones go, it's mostly for people with differing levels of hearing between their ears.  For example, I'd say I have maybe 85% hearing with my left ear compared to my right.  All I have to do is adjust the balance a bit towards the left speaker and voila my hearing is magically fixed biggrin.gif
And in my case the two volume knobs are to correct possible inbalance of the tubes also
post #3528 of 4838
Quote:
Originally Posted by hifimanrookie View Post


To do or not..the opa627 sounds almost the same as opa637..and yes..the opa637 CAN oscillate on lower gains..its wellknown..it gets stabile on 18db and forth... So in my opinion the opa627 is a good update choice biggrin.gif

 

At 18 or 20 dB of gain they should sound identical.

The difference between the two is academic when used for audio.

So why use the OPA637?

Be safe, use the OPA627.

Quote:
Originally Posted by muxamed View Post

 

I don't know though if the amp gets hotter with LM4562.

The amp won't get any hotter if you use the LM4562, or stock Op Amp, or OPA627, or Class A mod OPA627.

 

The amp will probably get hotter if you have an oscillating OPA637! 

post #3529 of 4838
Quote:
Originally Posted by Chris J View Post

Under certain conditions (Gain set to 0 or 10 dB) the Op Amp will probably oscillate.

 

I find the oscillating gives a neat surround sound effect to the soundstage.

post #3530 of 4838
Quote:
Originally Posted by chicolom View Post

Quote:
Originally Posted by Chris J View Post

Under certain conditions (Gain set to 0 or 10 dB) the Op Amp will probably oscillate.

 

I find the oscillating gives a neat surround sound effect to the soundstage.

 

That effect is nice actually. Specially with my beyer 990.  :D

post #3531 of 4838
Quote:
Originally Posted by chicolom View Post

 

I find the oscillating gives a neat surround sound effect to the soundstage.

You or the Op Amp?

post #3532 of 4838
Quote:
Originally Posted by Chris J View Post

You or the Op Amp?

 

If we oscillate together the effect is stronger.

post #3533 of 4838

Something's wrong with my mstage.  I was sitting here and I started to smell something burning and started to sniff around.  No smoke coming out but an obvious burning smell coming out of my amp. I opened it up and the burnt smell is stronger but I dont' know which part of the board.  Everything looks fine to me.

post #3534 of 4838
Quote:
Originally Posted by chicolom View Post

 

If we oscillate together the effect is stronger.

sounds kinda kinky

post #3535 of 4838
Quote:
Originally Posted by burrrcub View Post

Something's wrong with my mstage.  I was sitting here and I started to smell something burning and started to sniff around.  No smoke coming out but an obvious burning smell coming out of my amp. I opened it up and the burnt smell is stronger but I dont' know which part of the board.  Everything looks fine to me.

never a good thing, is it still under warranty?

 

what happened before the burning smell?

post #3536 of 4838
Quote:
Originally Posted by Chris J View Post

never a good thing, is it still under warranty?

 

what happened before the burning smell?

 

 Doubt I can get warranty since I bought it from another headfier.  Nothign happened before it started burning, it was on for a few hours looking pretty on my desk. 

post #3537 of 4838
Quote:
Originally Posted by Chris J View Post

sounds kinda kinky

 

lol

 

We try to climax (musically) at the same time.

post #3538 of 4838
Originally Posted by chicolom View Post

 

lol

 

We try to climax (musically) at the same time.

 

Nice avatar, by the way.

post #3539 of 4838
Quote:
Originally Posted by Taowolf51 View Post

Nice avatar, by the way.

 

Thanks,

 

...consider it imagery to go with my last post...

 

wink.gif


Edited by chicolom - 1/20/13 at 9:21pm
post #3540 of 4838

If anyone's looking to upgrade and sell theirs, I'm trying to get one of these for my computer rig. PM me! 

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