Sonifex CM-HPX1 Headphone Volume Control, Passive, XLR Input - Jack Output

Sonifex CM-HPX1 Headphone Volume Control, Passive, XLR Input - Jack Output

With the use of two female XLR connectors, this product can connect a stereo balanced line input and produce a level-controlled headphone output. Any headphones with an impedance greater than 150Ω can be used with it because it is transformer balanced. A set of headphones set to 150 volts appears at the input to be 600 volts, which is a reasonable load for most high-quality line output stages. This is because the transformer ratio of 2:1 ensures that any headphone load presented at the output is reflected through to the input at a 1:4 ratio.

Connectors & Controls

Headphone Output

The stereo headphone output uses a stereo 6.35mm jack socket with the following connections:

The headphone level will be at half the level of
the incoming signal with the volume control at 100%.

Volume Level Control

The volume level control sets the output level of the stereo headphone socket and runs logarithmically from zero to the maximum output level.

Analogue Inputs CM-HPX1

The stereo analogue input is on two female 3 pin
XLR connectors with the following pin assignments:
Pin 1: 0V Common
Pin 2: Phase
Pin 3: Non Phase