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post #46 of 247
5/30/07 at 3:06pm
Quote:
Originally Posted by Audio Jester View Post
Question for owners of the Opera that use the "Big Z" headphone jack. I was wondering first of all if there are many headphones that would require the "Z" (maybe name a few that do). Secondly, is the SQ for headphones that require "Z" much better when using that jack, or could the "z" Jack be used instead without much loss in SQ?
Another question...

is the difference between z and Z just a gain change or is there something else going on?
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post #47 of 247
5/30/07 at 3:56pm
It's an IMPEDANCE change. The big Z adds 120 ohms to the output. This is good for a few cans, but generally it's better to use the lowZ.
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post #48 of 247
5/30/07 at 4:59pm
The only headphones I'm aware of that need the 120ohm jack "Z", are the Beyer DT831 and DT931. Both sound thin and bright from a standard near-zero output impedance jack "z".
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post #49 of 247
5/30/07 at 5:12pm
Quote:
Originally Posted by upstateguy View Post
Another question...

is the difference between z and Z just a gain change or is there something else going on?


Although, it also effects a change in gain as a side effect of the impedence change, there is of course, a high and low gain selector for that purpose.



Quote:
Originally Posted by Skylab View Post
It's an IMPEDANCE change. The big Z adds 120 ohms to the output. This is good for a few cans, but generally it's better to use the lowZ.

Indeed in my testing with my cans listed,when the "low z" jack is utilized, there is a relative increase of control over the drivers effecting a tighter more accurate precise presentation to the music being played .

Also, I have great hopes of experimenting with my already moded k-501s, to be recabled hardwired to each driver each with its own termination to plug into both seperate low "z jacks", as a frankinphone pseudo balanced experiment.
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post #50 of 247
5/30/07 at 5:15pm
Thread Starter 
Quote:
Originally Posted by Hi-Finthen View Post
Also, I have great hopes of experimenting with my already moded k-501s, to be recabled hardwired to each driver each with its own termination to plug into both seperate low "z jacks", as a frankinphone pseudo balanced experiment.
I'm curious as to how this frankenphone is going to sound
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post #51 of 247
5/30/07 at 5:38pm
^ perhaps at a meet you will...

The k501 wire and termination to 1/8" plug with 1/4" adaptor screems to be rewired anyhow. I'm curious if there are design limitations to rewiring the phone to utilize each low "z jacks" one channel each L/R, and if not, what doing so may provide the k501s presentation...

I'll add these moded k501 are very engaging now driven "low z" with the Opera

I'm just dying to hack them up like cotlt migh try
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post #52 of 247
5/30/07 at 5:41pm
Thread Starter 
Quote:
Originally Posted by Hi-Finthen View Post
^ perhaps at a meet you will...

The k501 wire and termination to 1/8" plug with 1/4" adaptor screems to be rewired anyhow, and yes, I'm curious if their are design limitations to doing so and if not, what doing so may provide their presentation...

I'll add these moded k501 are very engauging driven "low z" with the Opera

I'm just dying to hack them up like cotlt migh try
In that case, I doubt I will be hearing them, since a meet in NE would be out of the way for me, unless you plan on paying travel expenses?
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post #53 of 247
5/30/07 at 6:17pm
Morph, how 'bout we all meet up in the next NYC meet? You being an old Jersey boy!
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post #54 of 247
5/30/07 at 6:20pm
Thread Starter 
That sounds like a plan! I have a couple of days vacation coming up in July! I can bring my infamous: Coby-Boostaroo rig!!! The sound is truly amazing!
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post #55 of 247
5/30/07 at 6:26pm
I don't know if the meet carries enough insurance for a rig like that.
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post #56 of 247
5/30/07 at 7:21pm
Thread Starter 
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post #57 of 247
5/30/07 at 7:46pm
Quote:
Originally Posted by Iron_Dreamer View Post
The only headphones I'm aware of that need the 120ohm jack "Z", are the Beyer DT831 and DT931. Both sound thin and bright from a standard near-zero output impedance jack "z".
another headphone that seems to improve connected to the Z output is AKG K340 (at least my bass-heavy K340). My K340 sound good enough on the "z" jack, but they have a hint of shrillness, that disappears when connected to the "Z" output.
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post #58 of 247
5/30/07 at 7:55pm
Quote:
Originally Posted by Hi-Finthen View Post
Also, I have great hopes of experimenting with my already moded k-501s, to be recabled hardwired to each driver each with its own termination to plug into both seperate low "z jacks", as a frankinphone pseudo balanced experiment.
I haven't opened up my Opera but I assume the two output jacks are connected in parallel to the amp output stage. If I am right, I don't see the difference between connecting , say, the left pair to "Z" and the right to "z", and connecting them to a Y-patch cable that splits the stereo "z" out in two mono 1/4" females.
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post #59 of 247
5/30/07 at 8:58pm
Quote:
Originally Posted by calaf View Post
I haven't opened up my Opera but I assume the two output jacks are connected in parallel to the amp output stage. If I am right, I don't see the difference between connecting , say, the left pair to "Z" and the right to "z", and connecting them to a Y-patch cable that splits the stereo "z" out in two mono 1/4" females.

So, are you saying there would be no advantage or sonic benefit to the admittedly speculative idea, of using two seperate low z jacks with one headphone so wired per my frankenphone experiment???? Just curious .... And if doing so would in any way harm the amp? Difficult question to know probably and perhaps better addressed to both Jan and headphone recablers... However, I would be curious of others opinions before asking of those sources their opinions......
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post #60 of 247
5/30/07 at 9:05pm
Quote:
Originally Posted by Hi-Finthen View Post
So, are you saying there would be no advantage or sonic benefit to the admittedly speculative idea, of using two seperate low z jacks with one headphone so wired per my frankenphone experiment???? Just curious .... And if doing so would in any way harm the amp? Difficult question to know probably and perhaps better addressed to both Jan and headphone recablers... However, I would be curious of others opinions before asking of those sources their opinions......
I don't see any advantage nor any risk, if my model of how the two jacks are wired is right. But, as I said, I haven't even opened the amp. You should really discuss your idea with Jan.
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