Designed specifically for the SE-02, the EXT Box is a multi-function external controller, offering high CV resolution filter frequency control with a full-sized knob. It also features an 1/8" to 1/4" connection converter for External Input and Audio Out. A drive-adjustable hi-pass filter with attenuation, rich overdrive and extremely potent boost, add rich character and depth, while expanded external input control, expressive gate triggering for external signal/sample manipulation, expand and inspire; let it breathe new life and fire into your beloved (and usefully compact) SE-02.

And what the Ext Box does for the SE-02, it can for many desktop synths and modules which offer some combination of External Input control, CV, Gate, and VCF CV connections; we recommend our Boomstar and Boomstar Modular Eurorack modules—especially the Tonestar.

HIGHLIGHTS

• Variable high-pass filter with drive control, for severe distortion and gain boost with on/off switch
• Interface to 1/4" connections: external input/audio output
• External Input 1/8" and 1/4" multed
• Audio Output 1/8" and 1/4" multed
• Secondary VCF CV input
• Filter CV source switch: knob or secondary source selection—such as your modular
• 3 Gate options: fixed gate switch, momentary gate switch (transformer), external gate input
• Large filter control knob for smooth or sharp, highly articulated sweeps
• Back panel 1/8"-1/4" connections: 1/8” and 1/4" inputs; 1/8” and 1/4” outputs
• Din interconnect: Output, Ext Input, VCF CV, Gate (cable included)
• True bypass
• Eurorack voltage compatible
• Interfaces with other desktop and modular synths
• 12v 3 prong low profile power adapter: one socket space for the US supply; the EU/UK supply is slightly larger and heavier
• Roland® style metal sides included
• Wooden endbells option - currently unavailable

Ext Box SE-02 Paduak Sides

Ext Box w/ Roland Boutiques

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Mini FAQ Anticipator

Two takes on the USB/Analog Audio Out:

Marc St. Regis

The SE-02 produces analog and USB audio simultaneously, and as a result, with the Ext Box connected, the SE-02's analog signal, passing through the Ext Box's drive/hi-pass circuits, will continue through to the Ext Box's audio output. To clarify, the 12dB (6dB slope) drive/hi-pass audio path, sourced from the SE-02 and/or the External Input, is analog and passes only to the Ext Box audio output (1/8" and 1/4"). The frequency CV and gate are very high resolution digital controls, and affect the USB and analog audio. The Ext Box allows very smooth filter frequency manipulation (VCF Cutoff), expanded gate functionality, and external input processing to pass back to USB audio: plenty there for the for USB-only audio enthusiasts to discover, without the benefit of the Drive and Hi Pass filter in the mix, which of course is nevertheless always outputted.

Tim Caswell

The Xbox will affect the VCF Cutoff, the External Input, and the Gate in the USB output. The Hi Pass and Overdrive will not be heard thru the USB connection, only the 1/8 and 1/4" outputs of the EXT Box.

4 Pots

FREQ, EXT, DRIVE, HP

5 Switches

SOURCE, GATE ON (x2: toggle and momentary), (FREQ) ON, HP ON

1/8" Patch Points

GATE (external gate input), VCF CV (SE-02 voltage-controlled, filter control voltage input), EXT (external signal audio input), OUT (audio output, post 12dB Hi Pass filter and DRIVE circuit)

1/4" Patch Points

EXT (external signal audio input), OUT (audio output, post 12dB Hi Pass filter and DRIVE circuit)

All Controls and Switches

FREQ - SE-02 Low Pass filter frequency, or cutoff attenuator.
SOURCE - Ext Box frequency, or external CV frequency control selector switch.
EXT - External Input attenuator.
GATE ON - Gate (drone) activation on/off switch.
(FREQ) ON - SE-02 Low Pass filter frequency attenuator on/off switch.
HP ON - Ext Box Hi Pass filter frequency attenuator on/off switch.
DRIVE - Ext Box 12 dB filter boost attenuator.
GATE - Momentary (transformer) Gate switch.
HP ON - 12 dB Hi Pass attenuator on/off switch.

PCB Mounting Scheme - Through-hole.
Dimensions - 2 1/8” (height) x 2 3/4“ (width) x 5” (length).
Auto-Switching Power Supply +12v.