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Price:
OPA-EARTH Dual OPA
USD22.5/1 unit (24*24*40)
OPA-EARTH Single OPA
USD12/1 unit
OPA-MOON Dual OPA
USD25/1 unit (24*24*40)
OPA-MOON Single OPA
USD13.5/1 unit
OPA-SUN Dual OPA USD30/1 unit
(24*24*40)
OPA-SUN Single OPA
USD16/1 unit
(Without Postage)
For
Extension lead of the OPA,
Price is
USD3/unit,
standard length 100MM, but you can also place an order for
50-100MM.
We guarantee to keep OPA in
working condition without charging any labor cost, but customers
will need pay for shipping charges both ways. The leads are not
guaranteed for repair.
Application : Generally the IC opamp application is designed for industrial
usage. When the IC opamp is used for audio, the performance is less
than satisfactory. This discrete opamp uses accurate matching of
components and audiophile grade resistors, combined with dedicated
audio design circuitry which gives a smooth and natural output
sound. This discrete opamp can be used to replace existing opamp in
amplifier or CD/DAC as an upgrade.
Quality assure:
Every OPA is thoroughly tested twice on professional equipments ,
Our priority is Quality first, followed by Efficiency.
OPA ¡V Earth :
Our
first generation discrete opamp has been sold throughout the world
by other marketing means. This discrete opamp utilizes integrated
cascode circuit with the schematic based on single channel circuit
which is an improvement based on new improved parameters and
technology. The sound characteristics is neutral and natural . THD
Less than 0.0005%(1KHz), Operating voltage¡G¡Ó9 TO ¡Ó25V¡AOpen loop
gain¡G35DB¡AOperating current¡G Approx. 28MA¡]Single OPA¡^¡AApprox.
56MA¡]Dual OPA¡^.(Products have been upgraded to Cap Model, using EVOX
MMK capacitors. )
OPA - Moon :
This discrete opamp uses dual differential gain stage and single
ended output stage circuit design , we try and audition for a long
period of time . The OPA-Moon sound characteristics is a bit of
tube-like (vacuum valve) , soft and slightly thick, and full of
emotions . THD Less than 0.0008%(1KHz), Operating voltage ¡G¡Ó9 TO
¡Ó25V¡AOpen loop gain¡G33DB¡AOperating current¡GApprox. 28MA¡]Single
OPA¡^ ¡A Approx 58MA¡]Dual OPA¡^ .(Products have been upgraded to Cap
Model, using EVOX MMK capacitors. )
OPA-SUN
:
This discrete opamp uses full balanced circuit design which is
widely appreciated by our Hong Kong and American followers among our
other products. THD Less than 0.0003%(1KHz), Operating voltage ¡G¡Ó12
TO ¡Ó20V¡AOpen loop gain¡G36DB¡AOperating current¡G Approx 25MA¡]Single OPA¡^¡AApprox. 50MA¡]Dual OPA¡^.(Products have been upgraded to Cap
Model, use EVOX MMK capacitors. )
The
discrete opamp not only can replace typical single or double output
opamp, but it also has a separate earth(ground) wire which can be
connected to the earth of the player. Even if the earth wire is not
connected or used, the output sound will have slight difference. The
user can choose to decide on his own, but we recommend to connect
the earth wire to ground. Please do not connect OPAs earth wire to
AC power socket ground.
Dual OPA:It can replace
AD712, AD827, C4570, JRC4580, JRC5532, JRC5532D, JRC5534, LF353,
LF358,LM833N, NE5532, NEC4520, NEC4570, NJM2068D, NJM2114, NJM2214D,
NJM4558, NJM4558D, NJM4560, NJM5532, NJM4558P, OP275, OPA2132,
OPA2134, OPA2604, RC4558D, RC4558, TL052, TL072,LT1057,BA5218,EL2244,LM4562
...
Single OPA:It can replace LF356,
LF357, NE5534, LT1122, OPA627,OPA637,OPA604, AD797,AD811, AD844,OPA603,OPA134...
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