Electro Harmonix 720 Stereo Looper User manual

1

WARNING: Your 720 comes equipped with an Electro-Harmonix 9.6DC-200 power supply
(same as used by Boss® & Ibanez®: 9.6 Volts DC 200mA). The 720 requires 75mA at 9VDC
with a center negative plug. Using the wrong adapter or a plug with the wrong polarity may
damage your 720 and void the warranty.

720

Stereo Looper

Congratulations on your purchase of the 720 looper! Enjoy 720 total seconds of
high-quality, stereo recording time and the ability to store 10 different loops. The
720 looper is packed with features such as reverse and ½ speed effects,
playback fadeout, real-time progress display, and a convenient programmable
second footswitch.

– FEATURES –

- 12 minutes of loop recording time

- 10 selectable, independent Loops that remain in memory until you erase them

- High quality uncompressed audio: 24-bit A/D/A, 44.1kHz Sample Rate

- Undo-Redo function (also available via optional footswitch)

- Reverse and ½ speed effects at the touch of a button or a footswitch tap

- Footswitch selectable for Stop or Effects

- Handy playback progress mode with seek function

- Unlimited overdubbing

- Optional external footswitch control for selecting loops and Undo/Redo

- Adjustable fadeout (trails) time

- Programmable looping order: REC/PLAY/DUB or REC/DUB/PLAY

- AC adaptor included or may be battery powered

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– CONTROLS and INDICATORS –

LEVEL Knob – Controls the output level of the Loop being played. Your dry

signal remains at unity signal level from input to output. The dry signal also
remains analog throughout the 720.

LOOP Footswitch – Use the LOOP footswitch to record, overdub, and playback
loops. The LOOP footswitch can also be used to stop and undo-redo loops. See
the QUICK START GUIDE on page 5 to learn how to use this footswitch to
create loops.

STOP/FX Footswitch – The STOP/FX footswitch can be set to either STOP
mode or FX mode. Select either mode by pressing and holding the PUSH:
MODE button for 2-seconds. When in STOP mode, a DOT appears on the
display next to the STOP label. When in FX mode, the DOT is off.

REC LED – Indicates when a loop is being recorded or overdubbed.

PLAY LED – Indicates when a loop is being played or overdubbed.

MEM LED – Indicates loop audio is in memory for the current loop bank.

LOOP Knob and PUSH: MODE Button – The LOOP knob has no pointer

because it is attached to a rotary encoder that can be continuously rotated in
either direction. This knob also has a PUSH: MODE button with two functions: 1)
to cycle through one of three available modes, and 2) once a mode is selected,
to adjust the value of that mode from 0-9. All modes and values are shown on
the digit display.

SELECTING/ ADJUSTING MODES – The 3 selectable modes are toggled on and
off by pressing the MODE button once. When mode-select is active, the digit
display will flash the currently selected mode. Turn the LOOP knob to cycle
through the three possible modes:

L = Loop Select
p = Loop Progress
F = Fadeout Time

When you arrive at the mode you would like to adjust, press the MODE button
once to select the mode. The display will stop flashing and it will show the
selected mode value from 0-9. The selected mode can now be adjusted with the
LOOP knob from 0-9.

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REVERSE Button – Press the REVERSE button to play the loop in reverse. The
REVERSE button glows red when enabled. Reverse can be used at any time to
playback or overdub a loop.

½ SPEED Button – Pressing the ½ SPEED button causes the pitch of the loop
to go down one octave and the tempo is halved. If a loop is overdubbed during
half-speed mode, returning to normal speed playback causes the pitch of the
overdub to go up one octave and the tempo is doubled. The ½ SPEED button
glows red when enabled. ½ SPEED can be used at any time during playback or
while overdubbing a loop.

FX LED – Indicates when an effect is active. The FX LED automatically lights
when the REVERSE or ½ SPEED buttons are used and the STOP/FX footswitch is
programmed to operate in STOP mode. Alternatively, the FX LED will toggle
on/off each time the STOP/FX footswitch is pressed and programmed to operate
in FX mode.

MONO/L INPUT – ¼” Left Instrument/Line Input Jack. Plug the output of your
instrument or another effects pedal into this jack. If you use just one input we
recommend you use the MONO/L input. The input impedance presented at this
jack is 1MΩ. The maximum allowable signal level into this jack is +6 dBu. The
input is unbalanced.

R INPUT – ¼” Right Input Jack. Plug the output of your instrument or another
effects pedal into this jack. Use this jack for stereo recording. The input
impedance presented at this jack is 1MΩ. The maximum allowable signal level
into this jack is +6 dBu; it is an unbalanced input.

MONO/L OUTPUT – ¼” Left Output Jack. The Left output signal is sent
through this jack. The dry signal present at the Left input will be output on the
MONO/L Output jack. The source impedance of the MONO/L Output is
approximately 330Ω.

Note: the MONO/L OUTPUT jack also functions as a power switch when
powered from a battery. Disconnect the cable to save battery power when the
720 is not in use.

R Output – ¼” Right Output Jack. The Right output signal is sent through this
jack. The dry signal present at the Right input jack is output to the R Output
jack. The source impedance of the R Output is 330Ω.

4

FC Jack – ¼” TRS Foot Controller Jack. Use this jack with popular three button
foot controller units to control the 720 bank up, bank down, and instant undo­redo.

The Digitech® FS3X 3-Button Footswitch [see: http://digitech.com/en-

US/products/fs3x-3-button-footswitch] is recommended for this application. If

using this product, the following switch labels on the FS3X control the following
720 functions: DOWN advances the 720 bank down; UP advances the 720 bank
up; and, MODE will instantly undo or redo.

The circuit required for the foot controller is as follows:

TIP / S1 = Instant Undo-Redo
RING / S2 = Bank Down
Diode-AND TIP+RING / S3 = Bank Up

9V Power Jack – Plug the output of the supplied AC adapter into the 9V power
jack located at the top of the 720. The Stereo Looper 720 draws 60mA
typ./75mA max. at 9VDC with a center-negative plug. The Stereo Looper 720
accepts Boss® and Ibanez® style AC adapters.