E7801
Xonar Essence One
Hi-Fi USB DAC (Digital-to-Analog Converter)
Opamp Swap Guide
Third Edition
Oct. 2012
Copyright © 2012 ASUSTeK Computer Inc.
All Rights Reserved
1
1
2
2
3A
4
4
3B
3B
1
1
4
1.
Serves as I/V (current to voltage convertor) that turns current from DAC
into voltage for output purpose. Changing this will affect all outputs
(including Headphone output, RCA output and XLR output).
2.
Serves as Low Pass Filter that filters background noises. Changing this
will affect all outputs (including Headphone output, RCA output and XLR
output).
3A. Serves as buffer that enhances the output signal for the speaker.
Changing this will affect the RCA output.
3B. Serves as buffer that enhances the output signal for the speaker.
Changing this will affect the XLR output
4.
Serves as buffer that enhances the output signal for the headphone.
Changing this will affect the headphone output.
Output
All outputs (Headphone output, RCA Headphone RCA output XLR output
Opamp
output, XLR output)
output
1
√
√
2
3A
3B
4
√
√
√
ꢀ
ASUS Xonar Essence One Opamp Swap Guide
Recommended OPamp List
Brand
NS
Model name
LME49860
LME49720NA
LM4562NA
OPA2111
OPA21ꢀ2
OPA2107
OP275
NS
NS
TI
TI
TI
ADI
ADI
NJRC
NJRC
AD82ꢀ
MUSE01
MUSE02
Sound Impression
The following table lists the sound impression brought by different combinations of
op-amp pairing.
DAC I/V Slot 1
TI – OPA2107
TI – OPA2107
DAC buffer Slot 2
TI – OPA21ꢀ2
Sound Impression
Brighter vocal, slightly less bottom sound
NS – LME49860
Even brighter than the above combination, and more
detailed with less but tighter bottom sound
NS – LME49720
NS – LM4562NA
Less warm than stock OP-amps, more extensive
detailed and dampened mid-range, Essence ST/STX
style
NS – LM4562NA
NS – LM4562NA
NS – LME49720NA
NS – LM4562NA
NJRC – MUSE02
NJRC – MUSE02
Wider sound stage but less detailed than the above
combination
Powerful, punchy sound with good sound stage; less
detailed present.
Brighter, thinner sound and more detailed than the
above combination
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ASUS Xonar Essence One Opamp Swap Guide
Australia statement notice
From 1 January 2012 updated warranties apply to all ASUS products, consistent
with the Australian Consumer Law. For the latest product warranty details please
excluded under the Australian Consumer Law. You are entitled to a replacement or
refund for a major failure and compensation for any other reasonably foreseeable
loss or damage. You are also entitled to have the goods repaired or replaced if the
goods fail to be of acceptable quality and the failure does not amount to a major
failure.
If you require assistance please call ASUS Customer Service 1ꢀ00 2787 88 or visit
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ASUS Xonar Essence One Opamp Swap Guide
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