GOODWOOD AUDIO THE TX UNDERFACER User manual

THE UNDERFACER
MANUAL

The Underfacer is like The Interfacer, but designed to be installed
under an angled pedal board. That’s why it’s called The Underfacer.
An inspired name choice, even if we say so ourselves.
Like The Interfacer, it’s all about professionalism. It’s about setting
your board up like the pros to be ready for any situation. Two
amps. One amp. Ground loops. Phase issues. Long cable runs. The
Underfacer handles all of these scenarios with ease. It even has a
master mute (accessible from on top of your board by connecting
RMT) for when the proverbial hits the fan. Think of it as installing
MacGyver under your pedal board, except it’s a pedal. And it won’t
finish every set with an explosion and an escape using a paper clip
and a shoe lace.
* Ground lift and phase inversion available on TX version only
†Phase only functional when TX button is pressed in
1. Tuner send
2. Audio out
3. Left in
4. Right in
5. Master mute
6. Press in for
ground lift –
right out*
7. RGB LED –
red = stereo /
blue = mono
8. Remote in –
using RMT,
press to mute /
hold to sum
9. Buffered input
10. Left out
11. Right out
12. VDC centre
negative –
mA
13. Press in to sum
14. Press in for
phase inversion
– right out*†
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How to connect The Underfacer.
If you have a vintage fuzz or wah, or any pedal that doesn’t like
being after a buffer, plug directly into that pedal, and from there go
to the input of The Underfacer.
Master mute
This is situated at the very end of the circuit before the L and R
outputs. With RMT connected you can access the master mute
from the top of your board. Tap RMT to tune silently, as a kill switch
for song transitions without delay and reverb trails, or if you need to
troubleshoot your board without sending unwanted noises to FOH.
When RMT’s LED is on, the master mute is active. RMT overrides
The Underfacer’s onboard mute push button, no matter which state
it is in. The Underfacer’s LED is solid when muted and flashing when
un-muted.
The Underfacer can power up muted or un-muted, the choice is
yours. To change this, hold down RMT’s foot switch, plug in power
and then immediately release the foot switch.
AMP
AMP
TUNER
GUITAR
RMT
DRY PEDALS
(compression,
overdrive,
boost etc.)
STEREO WET
PEDALS
(delay &
reverb etc.)

Summing
Summing can be achieved either with the on-board SUM push
button or with RMT. The LED will change colour – red is stereo
and blue is dual mono. You can switch modes whether muted or
un-muted. Changing modes when un-muted does not activate
the master mute.
To switch between stereo and dual mono with RMT, hold its foot
switch down for 3 sec. The LED will flash to show you’ve changed
modes. RMT overrides The Underfacer’s on-board SUM push
button, no matter which state it is in. The Underfacer’s LED will
always change colour to indicate which mode it’s in, even with
RMT connected.
The Underfacer features DMS™ which stands for Dual Mode
Summing. Unique circuitry, designed by Goodwood Audio, that
provides two types of summing, Stereo Sum and Split Sum.
The default setting is Stereo Sum.
Stereo Sum
Use this mode when the last pedal in your signal chain, before
returning to The Underfacer, is stereo. When the LED is red a true
stereo signal will be sent to your amps. When the LED is blue, the
left and right signal being sent by your last pedal is combined to
mono, and then split to both outputs – commonly referred to as
dual mono. This is useful if you only have one amp at rehearsal,
but two amps live. Use blue mode when you only have one amp,
to preserve your stereo ping pong delays, and then switch to red
mode for when you have two amps. When you’re playing live with
two amps and one dies, simply hold down RMT’s foot switch and
the repeats of your ping pong delay will be combined to both
outputs. It doesn’t matter which amp dies and you don’t have to
stop playing and use a hand to press a button or flick a toggle.

Split Sum
This mode is best suited to people who run a mono pedal board,
but like using two amps. To change to this mode take the lid off the
box and move the two dip switches from Stereo Sum to Split Sum.
Connect your last pedal to the left (L) return of The Underfacer
and keep it in blue mode. This will create a dual mono signal. If you
switch to red mode the L output will stay active, but the right (R)
output will have no signal.
Ground Lift & Phase Correction (The TX Underfacer only)
The TX Underfacer features red and black push buttons.
Press the red button to lift ground of the R output. Press the black
button to invert the phase of the R output by 180°
For phase inversion to work ground lift must be active – red button
pushed in.
Note. For ground lift to be effective, the outputs of The Underfacer
need to be connected directly to your amps. If you want to install
it under an angled board that has side panel connections, make
sure the ground of whatever side panel connectors you’re using are
not the same. To achieve this the jacks should either have a plastic
housing or be mounted into plastic or wood to make sure they do
not share a common ground.

@goodwoodaudio [e-mail]
Specs
Power: .mm barrel, centre negative, vDC power only!
Minimum mA
Dimensions (incl. all jacks and switches):
mm wide x mm deep x mm high
Weight:
The Underfacer – 310 grams
The TX Underfacer – 320 grams