[ninjikiran]

Using 0 gain with the biased opamp with my LCD-2's.  These thigns are more detailed than the k702's, without any annoying sibilant note fatigue.

 

[treal512]

Hmm, so flipping through the last some odd pages, I've come to no conclusion about what opamps I should try, haha. I received a used stock M-Stage (OPA2134? Havn't opened it yet) recently and would like to tinker with the sound. But having no extra parts, do I just start buying random opamps trying all of them or what? Off what basis do these matter the most? The headphones? Desired sound? Is there a helpful opamp guide that describes basic attributes, etc? I love tinkering with things, so thanks if anyone could help!
 
Also, is there a recommended burn-in period for the M-Stage?

 

[Mad Max]

Don't worry about burn-in, it sounds great out of the box and only gets better with time.
I noticed the treble harshness in mine go away after the first 50 hours or so, I think.
 
If you can't decide on anything, order a pair of HA3-2525-5 samples from Intersil, and TLE2081ACP from Texas Instruments.  They will need adapters.
Or you can just go for the OPA627 like the others.

 

[Jibbie]

Quick questions:
 
I have the Logitech Z2300s (I know they aren't very good, but they're just so that I can have speakers if I want them.  I plan on getting some legit speakers when I have the money), and have so far been plugging them into the headphone out of the Matrix (they use a 1/8 inch plug for input, so I just slap on a 1/4 converter).  I'm curious if it would be better to plug them into the line out on the back of the amp.  I could buy an RCA to mini female cable and plug it in that way.  Is that better?  When the speakers are plugged into the line out, will the headphone out cease working? And if both do work simultaneously, won't that mean that only half of the amps power is going to the headphone out and half is going to the line out?  I know nothing about amps' line-out functions and pre amps, so sorry if these were dumb questions.
 
Thank you, 

 

[Mad Max]

The Pre-amp out (not line-out, that's what DACs and soundcards tend to have) is always active.

 

[Jibbie]

Thanks for the quick reply, but will using the preamp out affect the output power on the headphone out?
 
Quote:

The Pre-amp out (not line-out, that's what DACs and soundcards tend to have) is always active.

 

 

[Mad Max]

Not sure on that, unfortunately.

 

[Jibbie]

Sad day 

 
 
Does anyone else know??
 
Quote:

Not sure on that, unfortunately.

 

 

[roadcykler]

I have those same Logitech's and I e-mailed Tam and asked him the same question and he said that headphones and those speakers can be used simultaneously. I'm not sure why one would do that except to maybe get the subwoofer involved in the headphone listening. I have them hooked up to the line out via an RCA to 1/8 plug. I can't speak to the potential power division (whether it does or does not).
Quote:

Quick questions:
 
I have the Logitech Z2300s (I know they aren't very good, but they're just so that I can have speakers if I want them.  I plan on getting some legit speakers when I have the money), and have so far been plugging them into the headphone out of the Matrix (they use a 1/8 inch plug for input, so I just slap on a 1/4 converter).  I'm curious if it would be better to plug them into the line out on the back of the amp.  I could buy an RCA to mini female cable and plug it in that way.  Is that better?  When the speakers are plugged into the line out, will the headphone out cease working? And if both do work simultaneously, won't that mean that only half of the amps power is going to the headphone out and half is going to the line out?  I know nothing about amps' line-out functions and pre amps, so sorry if these were dumb questions.
 
Thank you, 

 

 

[Jibbie]

Okay sweet thank you.  I'm assuming that if you have a headphone plugged in and the speakers into the preamp out and you play music it will come out of both the headphones and the speakers?  Thats strange, but I guess I'll just inplug my headphones anytime I want speakers, which is better than having to unplug headphones and then plug in speakers each time.

 

[Ocellia]

Just to say a big Thank you to all you folks who posted on here. Spotting a Matrix for sale, I scanned this string quickly and it determined my purchase. I needed something with reasonable power to run my Wharfedale Isodynamic phones.  It's STILL a squeeze! Running on 18 db at 3 p.m. on vol gets it loud enough!  Will try 20 to see if it affects quality.
The world's most inefficient phones?
But also one of the best!
Nice sound, as you all know.

 

[Jibbie]

I received the RCA > mini female cable I ordered from monoprice and my speakers do indeed work out of the pre-out at the back of the M-Stage.  If headphones are plugged in, sound will come from both the speakers and the headphones at the same time.  I'm not sure whether this means the output power of the M-Stage is split, and only part of the power is going to the headphones, but when I turn my speakers on and off with my headphones on my head, I notice no difference in sound quality so I'm fine with it.
 
Thanks again for the help guys.

 

[clams]

Quote:

I received the RCA > mini female cable I ordered from monoprice and my speakers do indeed work out of the pre-out at the back of the M-Stage.  If headphones are plugged in, sound will come from both the speakers and the headphones at the same time.  I'm not sure whether this means the output power of the M-Stage is split, and only part of the power is going to the headphones, but when I turn my speakers on and off with my headphones on my head, I notice no difference in sound quality so I'm fine with it.
 
Thanks again for the help guys.

Is that a good idea? Aren't you double amping your powered speakers then?

 

[Mad Max]

That shouldn't be an issue.

 

[project86]

The rear panel RCA out is a line level output signal, and is not powered in the same way that the headphone jack is. So you aren't splitting your power at all, nor are you double amping your powered speakers. Think of it like a pre-amp output on the back of a home theater receiver.