HD400 : Practically tool

The HD-400 really works! Ground loops, humming noise etc. are effectively suppressed by this device. Especially with the connection of notebooks to mixing consoles there are often problems with the used power supplies. Operated on battery power, everything is OK.

If you connect the HD400 between notebook and mixing console output, everything is now quiet.

This one is a must have for every sound tool case.

The inputs of the HD-400 are mono ¼? Jacks, outputs are stereo ¼? Jacks, so adaptors are needed.

The HD400 also can be used to connect a mixer with unbalanced outputs to an amplifier with balanced inputs.

A DI box could be used instead, but would change the signal level.

The housing looks cheap, but it´s the function that counts.