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Khairuddin
4
Jan 23, 2017
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hey guys, do you think my Asus Essence STXII with burson v5i op amp can drive this headphones? Or should I get a portable amp+DAC?
hokum
0
Jan 23, 2017
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KhairuddinThat card will drive cans up to 600ohm impedance... these headphones are 85ohm rated so you're quite ok with that.
Khairuddin
4
Jan 23, 2017
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hokumprobably the better question would be if this card can bring the very best out of this headphone?
soliloqueen
0
Jan 23, 2017
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Khairuddinthe TPA6120A2 chip that drives the final headput out in the STX is a low-impedance, low-distortion amp that drives everything pretty well and with pretty good sound. The damping factor is sufficient and the output impedance is linear, so there won't be any loose bass or shifting in phase
I wouldn't put a burson v5i in the gain stage of the stx. Just because you can swap an op-amp doesn't mean you should. The circuit design of the stx is specifically tuned to that opamp and with the burson you're likely going to seriously mess up the feedback in the circuit. it'll probably cause overloading which will cause an increase in harmonic distortion, which will sound like bass bloom and you might find pleasant, but rest assured it is slowly destroying the card.
if you replaced only the BUFFER stage with that op-amp (the one that's only a single op amp, not two) that only goes to the rca out (It's the line out driving opamp and is not even in the headphone circuit) so if you are using the headphone out you've done nothing at all. Except decrease the driving current of the line out because the burson is a gain-stage opamp, which is bad if you try to use the rca outs.
I wouldn't put a burson v5i in the gain stage of the stx. Just because you can swap an op-amp doesn't mean you should. The circuit design of the stx is specifically tuned to that opamp and with the burson you're likely going to seriously mess up the feedback in the circuit. it'll probably cause overloading which will cause an increase in harmonic distortion, which will sound like bass bloom and you might find pleasant, but rest assured it is slowly destroying the card.
if you replaced only the BUFFER stage with that op-amp (the one that's only a single op amp, not two) that only goes to the rca out (It's the line out driving opamp and is not even in the headphone circuit) so if you are using the headphone out you've done nothing at all. Except decrease the driving current of the line out because the burson is a gain-stage opamp, which is bad if you try to use the rca outs.
Khairuddin
4
Jan 24, 2017
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soliloqueenAppreciate your input in regards to this matter. But I have to say it does sounds better with burson's op amp in it, tested with my el cheapo sony IEM (that comes with my Xperia Z1), and i'm not talking about the gain increase, just the details like mids and lows are improved just by swapping the op amps. But I'll definitely gonna check out if those op amps are gonna decrese the life span of the sTX.
soliloqueen
0
Jan 24, 2017
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Khairuddinthey don't increase the details in the mids and lows, they add harmonic distortion to the mids and lows, an dthe human brain interprets increased distortion as increased detail
if you'd like, i can give you some safe op amp suggestions
your safest bet would be to put the stock opamps back in (BE CAREFUL OF WHAT YOU PUT WHERE BECAUSE THE TWO AMPS THAT ARE NEXT TO EACH OTHER ARE THE SAME AMP AND THE THIRD ONE APART IS DIFFERENT)
The two amps next to each other should be njm2114 and the line out amp should be a n lm or jrc 4562
The quickest and safest way to try out something different would be to get two additional lm4562s and replace the dual njm2114s with them, so that you have 3 identical lm4562 amps in all 3 op amp slots
if you'd like, i can give you some safe op amp suggestions
your safest bet would be to put the stock opamps back in (BE CAREFUL OF WHAT YOU PUT WHERE BECAUSE THE TWO AMPS THAT ARE NEXT TO EACH OTHER ARE THE SAME AMP AND THE THIRD ONE APART IS DIFFERENT)
The two amps next to each other should be njm2114 and the line out amp should be a n lm or jrc 4562
The quickest and safest way to try out something different would be to get two additional lm4562s and replace the dual njm2114s with them, so that you have 3 identical lm4562 amps in all 3 op amp slots
thomasshera
0
Jan 26, 2017
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hokumhowever the AKG 7xx have optimistic rating, as the volume rating is lower than is standard for the impedance calculation. In addition I've heard these cans are harder to drive than many headphones with 200+ ohms.
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