Ground Lift Switch - SE DM3 User Manual

Thank you!
Thank you for choosing the sE Electronics DM3. We
hope you enjoy using it as much as we've enjoyed
designing and building it for you.
The DM3 is an active DI, employing the well-established
DYNAMITE technology of our DM1 and DM2 inline
preamps. Its Ultra Hi-Z input, massive headroom and
dedicated Class-A output-buffer amplifier ensure that
you'll always get the best out of your instrument. The
DM3 can be directly connected to any Phantom-powered
XLR input, with no need for an extra cable. Its compact
size allows it to easily fit into your pocket, so the sound
quality you're looking for is always at your disposal.
Please note: The DM3 requires +48V Phantom power for
operation.
Ultra Hi-Z input
The DM3's ultra-high input impedance preserves the
individual sonic character of your instrument without any
compromise. Instruments with passive pickups (i.e.
electric guitars, stringed instruments with piezo pickups,
vintage high-impedance microphones) will especially
benefit from the DM3's stunningly high input impedance
of 10 MOhms.
Attenuation pad
For high-output instruments (i.e. electric guitars with
active pickups, keyboards, drum machines) a three-
position attenuation switch allows you to reduce the
signal by 15 or 30 dB. This is useful if the signal level is
too high for the input of your preamp or mixer.
Please note: The switch is embedded in a recess to
prevent unintended access; you will need a miniature
screwdriver to change its settings.

Ground lift switch

The DM3 features a dedicated three-position ground lift
switch. In the Off position, the ground lift is deactivated.
If you are experiencing unwanted hum or buzz, a ground
loop might be causing this. Turning the switch to the On
position will break any such loops, greatly reducing
noise.