The Stereo Headphone Amplifier Box Performance
Specifications
- 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
- Headphone Output
- 0.25 inch
3 pole a gauge jack socket
- 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
- External DC Connector
- 2.5 mm centre pin
positive (note 2)
- Dimensions
- Width 80 mm; Height 45 mm; Depth 135 mm
-
Weight
- 300 gm including battery
Notes to specifications
- Measurements of dBu are dB with respect to 0.775
volts
- 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
- 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 Electronics Conford Liphook Hampshire GU30 7QW England
Telephone +44 (0)1428 751469 Fax 751223 E-Mail contact@confordelec.co.uk
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