These designs provide ground-Isolation in balanced and unbalanced line-level systems to remove ground or earth-loops, thus removing the main cause of hum. Suitable for portable use or permanent installation they are built in rugged metal cases and are supplied with mounting brackets. Both mono, balanced and stereo, unbalanced, transformer-isolated types are offered.
AV-HK1 - Stereo - Dual RCA (phono) inputs and outputs
For use with unbalanced, high-impedance audio inputs, this has gold-plated input and output connectors. The AV-HK1 is supplied with two adapter cables to facilitate connecting with products that use miniature jack plugs and sockets.
The shield connection of each input socket is electrically isolated from the case and from the output ground. The shield connection of each output socket is connected to the case shield. The user audio source, such as a computer, CD player, cassette player or other consumer audio product, connects to the input. The output should be connected to the input of the grounded amplifier or mixer in the audio system.
Inputs: -10dBV nominal, 10kohms. Response: 20Hz-20kHz, +/- 3dB. Distortion: Better than 0.5% THD+N, 30Hz-20kHz; 0.05% at 1kHz. Crosstalk: Better than -60dB, 20Hz- 20kHz, 100ohms source, 10 kohms load; -70dB a 1kHz. Outputs: -10dBV nominal, 10kohms. Dimensions: 35 unmounted, 36.6 mounted x 52 x 73.7 (h x w x l) mm.
Included accessories: Mounting bracket. AV-AC2 Cable Kit: 1x dual RCA (phono) to 3.5mm stereo jack plug, 200mm, and 1x dual RCA (phono) to 3.5mm stereo jack socket, 200mm.
AV-HK1X - Mono - XLR input and output
This is for use with a balanced, low impedance source and either a low or high impedance load. Input and output XLR connectors have gold-plated contacts.
The shield or ground (pin 1) connection of the input socket is electrically isolated from the case and from the output ground (pin 1) at audio frequencies. The ground connection of the output socket is connected to the case shield. The user audio source, such as a mixer, preamplifier or other professional audio product, connects to the AV-HK1X input. The module output is to be connected to the input of the grounded amplifier or mixer in the audio system. The input connector shield does provide a radio-frequency ground return, thereby preserving system immunity to radio interference.
Input: +4 dBu nominal. Response: 20Hz-50kHz, +/- 0.1dB. Distortion: Better than 0.15% THD+N, 20Hz- 20kHz, 150ohms source, 10kohms load; 0.002% at 1kHz. Output: +4 dBu nominal. Dimensions: 44.5 unmounted, 49.5 mounted x 73.7 x 82.6 (h x w x l) mm.
Included accessories: Mounting bracket.