Conford Electronics
Professional Audio and Process Control
Stereo Headphone Amplifier Specification
Frequency Response
+0.2/-1 dB from 20 Hz to 20 kHz; -3 dB at 50 kHz
Noise
Less than -70 dBu (Note 1)
Distortion
Less than 0.2%
Maximum Gain
28 dB
Common Mode Rejection
Greater than 60 dB
Input Common Mode Clipping
Greater than +16 dBu
Input Impedance
60 kOhms bridging
Input Clipping Level
+20 dBu
Output Impedance
Less than 50 Ohms for 32 Ohm to 1 kOhm headphones
Output DC Offset
Less than 10 mVolts
Output Clipping Level
+10 dBu
Channel Separation
60 dB at 1 kHz
Channel Balance
1 dB
Connectors
Stereo Inputs
XLR 3 pin female or 0.25 inch 3 pole A gauge jack combination socket (Note 2)
Headphone Output
0.25 inch 3 pole a gauge jack socket (Note 2)
Pin Connections
Inputs
PIN 1 (sleeve) GROUND; PIN 2 (tip) SIGNAL; PIN 3 (ring) RETURN. To unbalance connect PIN 3 to ground
Headphone Output
SLEEVE: COMMON; RING: RIGHT SIGNAL; TIP: LEFT SIGNAL
PP3 Alkaline Battery Life
50 Hours typical
External DC Connector
2.5 mm centre pin positive (Note 3)
Dimensions
Width 80 mm; Height 45 mm; Depth 135 mm
Weight
300 gm including battery
Notes to specifications
1.
Measurements of dBu are dB with respect to 0.775 volts
2.
Various adaptors are available to convert to alternative connector standards.
See Accessories
See Accessories
3.
The unit may be operated from an external supply between 6 and 12 volts DC (maximum) at 15 mA quiescent, 100 mA peak. The recommended voltage is 9 volts. The supply should be floating and regulated
4.
A fitted belt clip is available to special order
Operating Controls
Front Panel
Mono/Stereo Selector
Two Position slide switch
Connectors
Stereo line inputs; Headphone Output
Rear Panel
Battery Holder
PP3 externally accessible
Power on/off
Two position slide switch with LED indicator
Connector
External DC supply
Conford, Liphook, Hampshire, GU30 7QW, UK
+44 (0)1428 751469
contact@confordelec.co.uk www.confordelec.co.uk/
Webmaster: John
+44 (0)1428 751469
contact@confordelec.co.uk www.confordelec.co.uk/
Webmaster: John
