PORTABLE AW HEADPHONE AMPLIFIER - RA-1 (Special Edition)

This headphone amplifier from AW Products is based on the highly acclaimed RA-1 Headphone Amplifier circuit, it is small and light weight and utilizes two 9V batteries. Please refer to the information below:

PRODUCT DETAILS:
OP AMP IC : JRC4556
RESISTOR : DALE CLOSE TOLERANCE
CAPACITOR : WIMA AUDIO GRADE
WORKING VOLTAGE : 18V (9V X 2 PCS INCLUDED)
BATTERY WORK LIFE : AROUND 20 HOURS (DEPENDS ON DIFFERENT HEADPHONE OUTPUT CONDITION)
SNR : 110DB
THD : 0.005%
CASE MATERIAL : ALUMINUM
PRODUCT SIZE : 100 X 70 X 25MM
WEIGHT : 160g (NOT INCLUDING BATTERIES)

BEST USED TO DRIVE HEADPHONES WITH IMPEDANCE RANGE : 16 ohm TO 120 ohm

YOU CAN CHANGE DIFFERENT OP AMP IC TO TAILOR THE SOUND QUALITY. BELOW ARE OP AMP ICs MODELS THAT CAN BE USED:

1) NE5532

2) OPA2134PA

3) OPA2227PA

4) OPA2111KP