Headphone Amplifier Box Specification

Products
Process Control
Audio

Home

Purchase

Accessories

Links

Contact

Conford Electronics

Professional Audio and Process Control

Balance Box
Description
Specification
PDF Download

Phantom Power Box
Description
Specification
PDF Download

Headphone Amplifier Box
Description
Specification
PDF Download

Stereo Headphone Amplifier Box
Description
Specification
PDF Download

Headphone Amplifier Box Specification

Frequency Response

+/-0.5 dB from 20 Hz to 20 kHz; - 3 dB 50 kHz

Noise

Less than -60 dBu (Note 1)

Distortion

Less than 0.1% from 20 Hz to 20 kHz

Gain Range

MIC

+20 dB to +60 dB

LINE

-20 dB to +20dB

Common Mode Rejection

Greater than 80 dB

Input Common Mode Clipping

Greater than 0 dB

Input Impedance

MIC

5 kOhms

LINE

120 kOhms bridging

Input Clipping Level

MIC

-10 dBu

LINE

+28 dBu

Output Impedance

Less than 50 Ohms for 32 Ohm to 1 KOhm headphones

Output DC offset

Less than 50 mVolts

Output Clipping Level

+15 dBu

Connectors

Input

XLR three pin female or 0.25 inch three pole A gauge jack combination socket (Note 2)

Output (Loop Through)

XLR three pin male (Note 2)

Headphone Output

0.25 inch three pole A gauge jack socket (Note 2)

Pin Connections

Signal Input and Output

PIN 1 (sleeve) GROUND; PIN 2 (tip) SIGNAL; PIN 3 (ring) RETURN To unbalance connect PIN 3 to ground

Headphone Output

SLEEVE: COMMON; RING and TIP: SIGNAL

PP3 Alkaline Battery Life

50 Hours typical

External DC Connector

2.5 mm centre pin positive (Note 3)

Dimensions

Width 80mm; Height 45mm; Depth 135mm

Weight

300 gm including battery

Notes to specifications

Measurements of dBu are dB with respect to 0.775 volts

Various adaptors are available to convert to alternative connector standards.

See Accessories

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

Sensitivity Selector

Two position slide switch

Connectors

Audio input and loop through output
Headphone output

Rear Panel

Battery Holder

PP3 externally accessible

Power on/off

Two position slide switch with LED indicator

Connector

External DC supply

Top Panel

Level

Rotary Potentiometer

««Description««

Conford, Liphook, Hampshire, GU30 7QW, UK
+44 (0)1428 751469
contact@confordelec.co.uk www.confordelec.co.uk/
Webmaster: John