Sonifex CM-HPX1

Headphone Vol Control (XLR In - Jack Out) 

This product allows the connection of a stereo balanced line input via 2 x female XLRs and creates a heaphone output, with level control. 

It is tranformer balanced, and can be used with any headphones above 150Ω impedance. 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 (hence a 150Ω set of headphones looks like 600Ω at the input, a suitable load for most good quality line output stages). 

Technical Specifications

• Input/Output Level Ratio: 2:1
• Input/Output Impedance Ratio: 4:1 
• Minimum Headphone Impedance: 150Ω
• Max Input Level: +28dBu
• Max Output Level: +22dBu
• Frequency Response: 20Hz to 20kHz, +0/-0.5dB 
• Noise: < -115dBu A-wgtd
• Distortion Ref +8dBu (Output): <0.01% 
• Common Mode Rejection: >80dB
• Dimensions: 7.7cm (W), 8.3cm (D), 4.2cm (H)
• Weight: Nett: 0.22kg, Gross: 0.33kg