Specification For Buffer A (High Gain(5) OPA 4227) OR B (Low
Gain(3) OPA 4228)
- Based on A 47 headamp, larger soundstage and smoother than the
cmoy. This one is made for grado and low impendance phone.
- Power capolarize : using Audio cap such as : rubycon ( Black gate
company), Capxon, Luxon ( from japan)
- Input caps : Wima MKP 10, one of the best Input caps
- Resistor : 1% tolerance resistor.
- Opamp : Using OPA 4228 and OPA 4227 opamps from Burr Brown Texas
Instrument.
- Gain : We have low gain ( x3-using opa 4228 ) and high gain ( x5-
using 4227 ). Chose your gain in your order
- Volume : Switch Volume.
The IC connector is using gold platted Liton jack for good sound
quality. Wire using is Silver Platted Wire, with bright sound.
Specification of C
- Based on Chu Moy Schematic, but have some change for smoother
sound.
- Power capolarize : using Audio cap such as : rubycon ( Black gate
company), Capxon, Luxon ( from japan )
- Resistor : 1% tolerance resistor.
- Opamp : Using OPA 2228 and OPA 2227, OPA 2134 and OPA 2132 opamps
from Burr Brown Texas Instrument. Please chose your option
- Gain : low gain ( x3-using opa 2228 ) and high gain ( x5- using
opa 2132, 2134, 2227 ).
- Volume : Switch Volume
Anyone collecting this stuffs also? :D
