Studio Electronics 5089, 4075, 3003 User Instructions

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BOOMSTAR MODULAR SYNTHESIZER SYSTEM
MODSTAR

RESONANT FILTER and AMP OPERATION MANUAL

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AMP

407550893003

DRIVE

ST 1/2

OUTPUTST 2/2ST 2/1

ST 1/1INPUT

INPUT

OUTPUT

STAGE 2/2

STAGE 1/2

DRONE

FULL

INPUT

1 V/O FREQ CV 1 FREQ CV 2 RESO CV

OUTPUT OUTPUT

FREQUENCY

FREQ CV 1

INPUT OUTPUT

FREQ CV 2

RESO CV

RESONANCE

HALF

TRACK

FULL

INPUT

1 V/O FREQ CV 1 FREQ CV 2 RESO CV

OUTPUT OUTPUT

FREQUENCY

FREQ CV 1

INPUT OUTPUT

FREQ CV 2

RESO CV

RESONANCE

HALF

TRACK

IMPORTANT INSTRUCTIONS - PLEASE READ

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Please read the Boomstar Modular Synthesizer Manual completely before use, and retain for future reference.

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IMPORTANT Ribbon Cable Power Information:

Boomstar Modular combines a set of individual modules to create a complete instrument. The individual modules can be
rearranged, removed, and replaced with any compatible eurorack modules from Studio Electronics and other manufacturers.

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Boomstar Modular uses a standard eurorack power rail to connect the modules to the internal bipolar +/-12v power supply. Please pay very close attention to
the orientation of the ribbon cable when adding and removing modules. The stripe on the ribbon cable marks -12v. This stripe needs to line up with the -12v
pins on the power rail and the -12v pins on the module. Failure to match up the pins correctly can result in damage to one or all the modules in the
Boomstar Modular. On the power rail, the -12v pins are clearly labeled. On the individual modules, the positive and negative sides of the pin connectors are
labeled next to the power header on either the top or bottom of the PCB.

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Do NOT remove individual modules from the Boomstar while synthesizer is plugged in.

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NEVER unplug ribbon cables from the Boomstar Modular, or any other modules while the Boomstar Modular is plugged in.

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Table of Contents

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Box Contents ..………………………….……….…………..…….. 1

Dimensions, and Power Specifications …………..……….… 2

Boomstar Modular Introduction ……………………….……… 3

Modular Signal Paths ………………………….……..….….…… 4

Complete Boomstar Modular Systems ……….……..…….… 5

Individual Modules …………….……………….…………..… 6-13

1 Year Limited Warranty ………………………….….……. 14-15

Support and Contact …………………………….……………… 16

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Box Contents

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5089 Filter Module Contents

1x 5089 Filter Module

1x Information Card

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4075 Filter Module Contents

1x 4075 Filter Module

1x Information Card

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3003 Filter Module Contents

1x 3003 Filter Module

1x Information Card

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AMP Filter Module Contents

1x AMP Amplifier Module

1x Information Card!

1

DIMENSIONS, AND POWER SPECIFICATIONS

Filters

5089 –!Size: 12hp
Module depth with ribbon cable attached: 39.7mm
Power Usage:

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4075 –!Size: 12hp
Module depth with ribbon cable attached: 39.7mm
Power Usage:

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3003 – Size: 12hp
Module depth with ribbon cable attached: 39.7mm
Power Usage:

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AMP

AMP – Size: 8hp
Module depth with ribbon cable attached: 39.7mm
Power Usage:!

2

Boomstar Modular Introduction

THE BOOMSTAR MODULAR SYSTEM realizes the seemingly inevitable!eurorack sprawl of our semi-modular BOOMSTAR
desktop synth, consisting of 14 modules that dramatically open up the root level programming and sound sculpting of that
lush and potent, and already flexible Boomstar sound.

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What makes it tick: Let’s tick ‘em off: Class A 5089, 3003 and AMP *, rugged through-hole construction, discrete circuitry,
hand-matched transistors in the filters and amplifier, multi-filtered, hand-crafted, Premium Quality Analog sound. We’d like to
think we’ve learned a few things bringing the MIDIMINI, SE1-X, ATC-X, polyphonic CODE OMEGA synths, MODMAX PEDALS,
C2S, PRE 2, and SLATE PRO AUDIO DRAGON and FOX to market, and the air waves worldwide.

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Our Boomstar Modular System’s (Modstar) 5089 circuit mirrors faithfully the filter design from the Minimoog—it is not a style;
it’s not a type, not reminiscent of, not vintage inspired—it is the analog sound standard manufactured anew, and how we love it
so. Apply the same thinking to our 4075, 3003, and SE80 filters vis-à-vis their originals, and you’ve caught our drift; the
OSCILLATION and AMP modules also resonate with the Mini’s timeless designs, functionality, and gorgeous, gleaming sound—
modernized and reimagined by the maestro Tim Caswell himself, but we’re just getting started here; the SEM filter is on deck.

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We hope you are as thrilled with your purchase of the complete system/individual modules as we are with our partnership with
PITTSBURGH MODULAR, and the final highly collaborative through-hole designs which flowed from the first Nicol/St. Regis
Beer Summit at Winter NAMM ’13. The MODSTAR module breakdown upshot: Filters, Oscillators, and AMP are built by SE,
and the intoxicating remainder by our good friends and exceedingly savvy business partners at PGH—without whose invaluable,
real world/walking the streets of Euroland insights, experience, and deep resources, this project would have faded to grey. A
tip of the SE chapeau to Richard Nicol, Perry, and the full-strength, generally less-weathered outfit at PM. AND to Geoff Farr
who relentlessly hounded the St. Regis bros—“When are the euro modules going to be ready?” “Can I get a single pic?” Looks.

* See pg.12, par. 2 for caveat.!

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Modular Signal Paths

(Copy courtesy of Pittsburgh Modular)

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The BOOMSTAR MODULAR’S signal path is divided into two types of signals: audio signals and control
voltages.

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The audio signal is the sound that is produced. The audio signal path starts at a sound source such as a
Waveforms oscillator, LFO running at audio rate, or the Filter in oscillator mode. The audio signal is then
patched through other modules used to shape the sound such as mixers, filters, and amplifiers.

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Control voltages (CV) manipulate the audio signal in several different ways.

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Gates are represented by a high or low control voltage. A gate can be generated using a square or pulse
wave from an oscillator or LFO, or by using a gate output from an external sequencer, or MIDI keyboard.
A gate can be shaped using an envelope generator to control the attack, decay, sustain, and release of
the gate. The modified gate signal can then be sent to any CV input on the synth.

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A second use for control voltages is as a modulation source. For example, a control voltage from the
SCI-FY S/H OUT (Sample and Hold) module patched into the 1V/O input on an OSCILLATION module
controls the frequency of the oscillator based on the randomly generated sequence of notes,
additionally, the OSCILLATION module’s full range oscillators make perfect control voltage modulation
sources; and audio signals make excellent control voltage source for oscillator FM (frequency
modulation). Understanding exactly how it works can sometimes hinder creativity—experiment!

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Complete Boomstar Modular Systems

Two Oscillator 4075/SE80 Filter Configuration (mock-up doesn’t include MIDI, Multiple, Outs, and LFO modules)

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MODSTAR SEITO 104 hp: Midi 6hp, Oscillation (x2) 32hp, Filter (not SE80) 12hp, Multiple 2hp, Levels 10hp, Sci-Fy 10hp, Shapers 12hp, AMP 8hp, LFO 6hp, Outs 6hp.
MODSTAR SENSEI 172-176 hp: Midi 6hp, Oscillation x3 48hp, Filters 32-46hp (1x 3003, 4075, 5089 or SE80 +1 resonant flt.) Multiple x2 4hp, Levels x2 20hp, Sci-

Fy 10hp, Shapers x2 24hp, AMP x2 16hp, LFO 6hp, Outs 6hp.

Models now shipping detailed below.!

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AMP

SHAPERS

SCI-FYLEVELS

SE80

4075OSCILLATIONOSCILLATION

AMP

SHAPERS

SCI-FYLEVELS

SE80

4075OSCILLATIONOSCILLATION

DRIVE

ST 1/2

OUTPUTST 2/2ST 2/1

ST 1/1INPUT

INPUT

OUTPUT

STAGE 2/2

STAGE 1/2

DRONE

ATTACK ATTACK

DECAY DECAY

SUSTAIN SUSTAIN

RELEASE RELEASE

IN 1 OUT 1 INV 1 IN 2 OUT 2

ON

OFF

LOOP 1

SHORT

LONG

RANGE 1

ON

OFF

LOOP 2

SHORT

LONG

RANGE 2

HP FREQUENCY LP FREQUENCY LP RESONANCE

LP FM 2HP FM 1

HP RESONANCE LP FM 1 LP RES CV

HP RES CV INPUT OUTPUT

FULL

HALF

TRACK

FULL

HALF

TRACK

1 V/O HP FM 1 HP FM 2 HP RES CV LP FM 1 LP FM 2

HP IN HP OUT LP IN LP OUT LP OUT LP RES CV

FULL

INPUT

1 V/O FREQ CV 1 FREQ CV 2 RESO CV

OUTPUT OUTPUT

FREQUENCY

FREQ CV 1

INPUT OUTPUT

FREQ CV 2

RESO CV

RESONANCE

HALF

TRACK

1 V/O

WAVE MIX

SINE TRI SAW SQR

FM IN SYNC IN PW IN SUB OUT

SINE OUT TRI OUT SAW OUT RAMP OUT SQR OUT

ON

OFF

TRACK

- TUNE +FREQUENCY

PW CV IN PULSE WIDTH

SUB LEVELFM CV IN

1 V/O

WAVE MIX

SINE TRI SAW SQR

FM IN SYNC IN PW IN SUB OUT

SINE OUT TRI OUT SAW OUT RAMP OUT SQR OUT

ON

OFF

TRACK

- TUNE +FREQUENCY

PW CV IN PULSE WIDTH

SUB LEVELFM CV IN

DRIVE

ST 1/2

OUTPUTST 2/2ST 2/1

ST 1/1INPUT

INPUT

OUTPUT

STAGE 2/2

STAGE 1/2

DRONE

ATTACK ATTACK

DECAY DECAY

SUSTAIN SUSTAIN

RELEASE RELEASE

IN 1 OUT 1 INV 1 IN 2 OUT 2

ON

OFF

LOOP 1

SHORT

LONG

RANGE 1

ON

OFF

LOOP 2

SHORT

LONG

RANGE 2

HP FREQUENCY LP FREQUENCY LP RESONANCE

LP FM 2HP FM 1

HP RESONANCE LP FM 1 LP RES CV

HP RES CV INPUT OUTPUT

FULL

HALF

TRACK

FULL

HALF

TRACK

1 V/O HP FM 1 HP FM 2 HP RES CV LP FM 1 LP FM 2

HP IN HP OUT LP IN LP OUT LP OUT LP RES CV

FULL

INPUT

1 V/O FREQ CV 1 FREQ CV 2 RESO CV

OUTPUT OUTPUT

FREQUENCY

FREQ CV 1

INPUT OUTPUT

FREQ CV 2

RESO CV

RESONANCE

HALF

TRACK

1 V/O

WAVE MIX

SINE TRI SAW SQR

FM IN SYNC IN PW IN SUB OUT

SINE OUT TRI OUT SAW OUT RAMP OUT SQR OUT

ON

OFF

TRACK

- TUNE +FREQUENCY

PW CV IN PULSE WIDTH

SUB LEVELFM CV IN

1 V/O

WAVE MIX

SINE TRI SAW SQR

FM IN SYNC IN PW IN SUB OUT

SINE OUT TRI OUT SAW OUT RAMP OUT SQR OUT

ON

OFF

TRACK

- TUNE +FREQUENCY

PW CV IN PULSE WIDTH

SUB LEVELFM CV IN

RM IN 1 RM IN 2 S/H IN 1 S/H IN 2

MOD OUT NOISE OUT S/ H OUT

LFO FREQRING MOD

NOISE S/ H OUT LAG

S/H IN 1 S/H IN 2

CH 1 IN CH 2 IN CH 3 IN CH 4 IN

CH 5 IN CH 6 IN 1-4 OUT OUTPUT

CHANNEL 2CHANNEL 1

CHANNEL 3 CHANNEL 4

CHANNEL 5 CHANNEL 6

RM IN 1 RM IN 2 S/H IN 1 S/H IN 2

MOD OUT NOISE OUT S/ H OUT

LFO FREQRING MOD

NOISE S/ H OUT LAG

S/H IN 1 S/H IN 2

CH 1 IN CH 2 IN CH 3 IN CH 4 IN

CH 5 IN CH 6 IN 1-4 OUT OUTPUT

CHANNEL 2CHANNEL 1

CHANNEL 3 CHANNEL 4

CHANNEL 5 CHANNEL 6

5089 Filter Module

Description

The 5089 filter is a voltage controlled, discrete analog, 24 db/oct transistor ladder, low-pass filter, employing hand-matched
transistors. Our ladder low-pass filter—a subtractive analog sound synthesis foundation—in its lowest FREQUENCY setting
removes, or cuts off higher frequency harmonics; its RESONANCE or Q circuit emphasizes those harmonics to the point of
“squealy,” giddy self-oscillation, tracking the keyboard in its FULL setting quite nicely if seeking an alternative sine wave.

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Our 5089 has the roundest, slickest tone of all the Boomstar’s filters. Go easy on it, and round, creamy buttery flavors wrap
the oscillators in earthy warmth; smash it and a!meaty, satisfying overdrive, and a maximum harvest of vintage 1960s and
1970s organic-sounding, second-order harmonic distortion fill the plate. Every setting is balanced and bountiful. Looking for
traditional R ’n B baselines and leads? Focus here on the rich saturation of this benchmark filter and its symmetrical cascades
of generation-stretching timbres. All BOOMSTAR MODULAR filters are hand-built in the U. S. Pick-and-Place all the way!

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Potentiometer Potential

Seven attenuation pots control the FREQUENCY, RESONANCE, FREQ CV 1, RESO CV, FREQ CV 2, INPUT and OUTPUT,
delivering smooth, detailed, and complex expression.

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Switch It Up

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Classic Minimoog FULL and HALF strength filter frequency keyboard/voltage tracking for rounder low end with brilliant highs.

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Patch It Up

Seven patch points: 1 V/O, FREQ CV 1, FREQ CV 2, RESO CV, INPUT and 2x OUTPUT direct the deepest manipulation.!

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AMP

407550893003

DRIVE

ST 1/2

OUTPUTST 2/2ST 2/1

ST 1/1INPUT

INPUT

OUTPUT

STAGE 2/2

STAGE 1/2

DRONE

FULL

INPUT

1 V/O FREQ CV 1 FREQ CV 2 RESO CV

OUTPUT OUTPUT

FREQUENCY

FREQ CV 1

INPUT OUTPUT

FREQ CV 2

RESO CV

RESONANCE

HALF

TRACK

FULL

INPUT

1 V/O FREQ CV 1 FREQ CV 2 RESO CV

OUTPUT OUTPUT

FREQUENCY

FREQ CV 1

INPUT OUTPUT

FREQ CV 2

RESO CV

RESONANCE

HALF

TRACK

5089 Filter Module (cont.)

All Controls and Patch Points

FREQUENCY –!Adjusts the frequency, or cut-off of the filter.
RESONANCE –!Adjusts the resonance, or “Q” of the filter. *
FULL HALF TRACK –!Switch between full and half keyboard/voltage tracking.
FREQ CV 1 –!Frequency control voltage 1 input attenuverters.
RESO CV – Resonance control voltage input attenuverters.
FREQ CV 2 – Frequency control voltage 2 input attenuverters.
INPUT – Adjusts the audio input.
OUTPUT – Adjusts the audio output.
1 V/O – One volt per octave control voltage input.
FREQ CV 1 – Frequency control voltage 1 input.
FREQ CV 2 – Frequency control voltage 2 input.
RESO CV – Resonance control voltage input.
INPUT – Audio input.
2x OUTPUT – Audio outputs.

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* From 7:00 (0) to 9:00 our “Negative Resonance Saturation” adds beefiness, boosting the waveform amplitude and taming
waveform transients; set to 9:00 to achieve the cleanest tone possible.!

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AMP

407550893003

DRIVE

ST 1/2

OUTPUTST 2/2ST 2/1

ST 1/1INPUT

INPUT

OUTPUT

STAGE 2/2

STAGE 1/2

DRONE

FULL

INPUT

1 V/O FREQ CV 1 FREQ CV 2 RESO CV

OUTPUT OUTPUT

FREQUENCY

FREQ CV 1

INPUT OUTPUT

FREQ CV 2

RESO CV

RESONANCE

HALF

TRACK

FULL

INPUT

1 V/O FREQ CV 1 FREQ CV 2 RESO CV

OUTPUT OUTPUT

FREQUENCY

FREQ CV 1

INPUT OUTPUT

FREQ CV 2

RESO CV

RESONANCE

HALF

TRACK

4075 Filter Module

Description

The 4075 filter is a voltage controlled, discrete analog, 24/db/oct cascaded transconductance low-pass filter, employing hand­matched transistors. In its lowest FREQUENCY setting it shaves off higher frequency harmonics; its RESONANCE or “Q”
circuit pushes those harmonics past the self-oscillation boiling point, projecting a thumpy, thrashing squeal, with explosive low
to mid-range power and depth. The design is actually pulled from the four-pole ARP 4072 (better: more parts and trims), sans
the 12kHz design flaw which hamstrung the original’s high end. The 4075 name has stuck—no correcting our little misnomer.

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Our 4075 filter is the most requested of the Boomstar filter models, perhaps owing to its uniqueness. Has there ever been a
better match for a square wave? It weaves dreams with “glidey,” 70s basslines, is a natural in the lead department, and feels
as if a temper tantrum simmers a mere micron beneath its veneer of faux respectability. Aggressive and articulate, this fresh
ARP can snap punishing kick drum sounds out as well as color with bright, edgy, stringy tones for essential arpeggiations.

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Potentiometer Potential

Seven attenuation pots control the FREQUENCY, RESONANCE, FREQ CV 1, RESO CV, FREQ CV 2, INPUT and OUTPUT,
delivering smooth, detailed, and complex expression.

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Switch It Up

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Classic Minimoog FULL and HALF strength filter frequency keyboard/voltage tracking for rounder low end with brilliant highs.

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Patch It Up

Seven patch points: 1 V/O, FREQ CV 1, FREQ CV 2, RESO CV, INPUT and 2x OUTPUT direct the deepest manipulation.!

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AMP

407550893003

DRIVE

ST 1/2

OUTPUTST 2/2ST 2/1

ST 1/1INPUT

INPUT

OUTPUT

STAGE 2/2

STAGE 1/2

DRONE

FULL

INPUT

1 V/O FREQ CV 1 FREQ CV 2 RESO CV

OUTPUT OUTPUT

FREQUENCY

FREQ CV 1

INPUT OUTPUT

FREQ CV 2

RESO CV

RESONANCE

HALF

TRACK

4075 Filter Module (cont.)

All Controls and Patch Points

FREQUENCY –!Adjusts the frequency, or cut-off of the filter.
RESONANCE –!Adjusts the resonance, or “Q” of the filter. *
FULL HALF TRACK –!Switch between full and half keyboard/voltage tracking.
FREQ CV 1 –!Frequency control voltage 1 input attenuverters.
RESO CV – Resonance control voltage input attenuverters.
FREQ CV 2 – Frequency control voltage 2 input attenuverters.
INPUT – Adjusts the audio input.
OUTPUT – Adjusts the audio output.
1 V/O – One volt per octave control voltage input.
FREQ CV 1 – Frequency control voltage 1 input.
FREQ CV 2 – Frequency control voltage 2 input.
RESO CV – Resonance control voltage input.
INPUT – Audio input.
2x OUTPUT – Audio outputs.

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* From 7:00 (0) to 9:00 our “Negative Resonance Saturation” adds beefiness, boosting the waveform amplitude and taming
waveform transients; set to 9:00 to achieve the cleanest tone possible.!

9

AMP

407550893003

DRIVE

ST 1/2

OUTPUTST 2/2ST 2/1

ST 1/1INPUT

INPUT

OUTPUT

STAGE 2/2

STAGE 1/2

DRONE

FULL

INPUT

1 V/O FREQ CV 1 FREQ CV 2 RESO CV

OUTPUT OUTPUT

FREQUENCY

FREQ CV 1

INPUT OUTPUT

FREQ CV 2

RESO CV

RESONANCE

HALF

TRACK

3003 Filter Module

Description

The 3003 filter is a voltage controlled, discrete analog 18 db/oct ladder low-pass filter, employing hand-matched transistors.
Drop the FREQUENCY knob to 0 and things get pretty dull; swing it back up and those "Transistor Bass” highs come crashing

through the gate. The 3003’s RESONANCE circuit at max will sing out more than the TB’s signature chirping in a fun, bubbly,

if washy, poorer relation, Mini “clone-ish" way; use it tastefully, or throw moderation to the wind for overwhelming chirp force.

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Our 3003 filter has the most gentle sonic touch of its partners in the Boomstar fold, but nevertheless is quite capable of
shaping precise, very dynamic tone. Whether or not this STUDIO ELECTRONICS filter is filling its traditional baseline boxing
niche, driving a harsh, liquid, acid-like tone, a softer more rubber-bandy SH-101-ish presence, or out of the bass range
altogether, leading the way, all is within easy reach of this surprisingly warm and versatile VCF. The 3003 can be distinctly
vocal at times, especially when one is willing to put grittier, more distorted desires aside.

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Potentiometer Potential

Seven attenuation pots control the FREQUENCY, RESONANCE, FREQ CV 1, RESO CV, FREQ CV 2, INPUT and OUTPUT,
delivering smooth, detailed, and complex expression.

!

Switch It Up

!

Classic Minimoog FULL and HALF strength filter frequency keyboard/voltage tracking for rounder low end with brilliant highs.

!

Patch It Up

Seven patch points: 1 V/O, FREQ CV 1, FREQ CV 2, RESO CV, INPUT and 2x OUTPUT direct the deepest manipulation.!

10

AMP

407550893003

DRIVE

ST 1/2

OUTPUTST 2/2ST 2/1

ST 1/1INPUT

INPUT

OUTPUT

STAGE 2/2

STAGE 1/2

DRONE

FULL

INPUT

1 V/O FREQ CV 1 FREQ CV 2 RESO CV

OUTPUT OUTPUT

FREQUENCY

FREQ CV 1

INPUT OUTPUT

FREQ CV 2

RESO CV

RESONANCE

HALF

TRACK

FULL

INPUT

1 V/O FREQ CV 1 FREQ CV 2 RESO CV

OUTPUT OUTPUT

FREQUENCY

FREQ CV 1

INPUT OUTPUT

FREQ CV 2

RESO CV

RESONANCE

HALF

TRACK

INPUT

1 V/O FREQ CV 1 FREQ CV 2 RESO CV

OUTPUT OUTPUT

FREQUENCY

FREQ CV 1

INPUT OUTPUT

FREQ CV 2

RESO CV

RESONANCE

HALF

TRACK

3003 Filter Module (cont.)

All Controls and Patch Points

FREQUENCY –!Adjusts the frequency, or cut-off of the filter.
RESONANCE –!Adjusts the resonance of the filter. *
FULL HALF TRACK –!Switch between full and half keyboard/voltage tracking.
FREQ CV 1 –!Frequency control voltage 1 input attenuverters.
RESO CV – Resonance control voltage input attenuverters.
FREQ CV 2 – Frequency control voltage 2 input attenuverters.
INPUT – Adjusts the audio input.
OUTPUT – Adjusts the audio output.
1 V/O – One volt per octave control voltage input.
FREQ CV 1 – Frequency control voltage 1 input.
FREQ CV 2 – Frequency control voltage 2 input.
RESO CV – Resonance control voltage input.
INPUT – Audio input.
2x OUTPUT – Audio outputs.

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* From 7:00 (0) to 9:00 our “Negative Resonance Saturation” adds beefiness, boosting the waveform amplitude and taming
waveform transients; set to 9:00 to achieve the cleanest tone possible. !

11

AMP

407550893003

DRIVE

ST 1/2

OUTPUTST 2/2ST 2/1

ST 1/1INPUT

INPUT

OUTPUT

STAGE 2/2

STAGE 1/2

DRONE

FULL

INPUT

1 V/O FREQ CV 1 FREQ CV 2 RESO CV

OUTPUT OUTPUT

FREQUENCY

FREQ CV 1

INPUT OUTPUT

FREQ CV 2

RESO CV

RESONANCE

HALF

TRACK

FULL

INPUT

1 V/O FREQ CV 1 FREQ CV 2 RESO CV

OUTPUT OUTPUT

FREQUENCY

FREQ CV 1

INPUT OUTPUT

FREQ CV 2

RESO CV

RESONANCE

HALF

TRACK

INPUT

1 V/O FREQ CV 1 FREQ CV 2 RESO CV

OUTPUT OUTPUT

FREQUENCY

FREQ CV 1

INPUT OUTPUT

FREQ CV 2

RESO CV

RESONANCE

HALF

TRACK

AMP Module

All Controls and Patch Points

From Designer Tim Caswell’s own hand: The amplifier (AMP) is a 2 stage Class A discrete design using 3 pairs of hand matched
transistors. Envelope is usually applied to ST1/1. ST1/2 goes thru an attenuverter and can be used for envelope or modulation. ST2/1
goes to the 2nd stage, and is typically used for volume control. ST2/2 goes thru an attenuverter and is typically used for modulation.

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The AMP, the 5089, and the 3003 are Class A circuits. They draw more current from the +12 rail than from the -12 volt rail. If the
system power supply is under-sized, hum or buzz may be heard. In that case, larger filter capacitors and/or a larger power transformer
will be needed. The 4075 draws equally from both rails, and is more immune to hum. Like our filters Boomstar Modular AMP modules
are hand-built entirely in the U. S. of A—just ask Rachael!

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Potentiometer Potential

Four attenuation pots control the INPUT, STAGE 1/2, STAGE 2/2, and OUTPUT, delivering smooth, detailed, and complex expression.

!

Switch It Up

Uber useful continuous hypnotic DRONE for endless sustain/release and DRIVE—the overdrive circuit from the Boomstar desktop—for
last stage energy, and bite.

!

Patch It Up

Six patch points: INPUT, ST 1/1, ST 1/2, ST 2/1, ST 2/2, OUTPUT direct the deepest manipulation.!

12

AMP

DRIVE

ST 1/2

OUTPUTST 2/2ST 2/1

ST 1/1INPUT

INPUT

OUTPUT

STAGE 2/2

STAGE 1/2

DRONE

AMP Module (cont.)

All Controls and Patch Points

INPUT –!Adjusts the audio input.
STAGE 1/2 –!Adjusts stage 1/2.
STAGE 2/2 – Adjusts stage 2/2.
DRONE – Sustains the last note received—“Hold that Train.”
DRIVE – Final output stage overdirve/saturation.
OUTPUT – Adjusts the audio output.
INPUT –!Audio input.
ST 1/1 – Stage 1/1 input.
ST 1/2 – Stage 1/2 input.
ST 2/1 – Stage 2/1 input.
ST 2/2 – Stage 2/2 input.
OUTPUT – Audio output.!

13

AMP

DRIVE

ST 1/2

OUTPUTST 2/2ST 2/1

ST 1/1INPUT

INPUT

OUTPUT

STAGE 2/2

STAGE 1/2

DRONE

1 Year Limited Warranty

LIMITED WARRANTY TERMS AND CONDITIONS

This Limited Warranty applies only to ANALOGIA INC./STUDIO ELECTRONICS purchased in the United States of America. Outside the USA, warranty policy
and service is determined by the laws of the country of purchase and followed by our local authorized distributor. A listing of our authorized distributors is
available at http://www. studioelectronics.com/shop/distributors/

ANALOGIA INC./STUDIO ELECTRONICS warrants to the first owner of a covered product purchased directly from ANALOGIA INC./STUDIO ELECTRONICS, or
an authorized ANALOGIA INC./STUDIO ELECTRONICS dealer in the U.S., that this product will be free from defects in materials and or workmanship for a
period of one year from the date of purchase. Please register this product online at http://studioelectronics.com/support/ registration/ to establish the date
of purchase (NOT A REQUIREMENT FOR WARRANTY SERVICE BUT A GOOD IDEA).

To exercise your rights under this Warranty as the first owner/purchaser, YOU MUST SHIP THIS PRODUCT IN ITS ORIGINAL PACKAGING (which we can
replace and send to you for $10) at your expense, with proof of purchase documentation and the ANALOGIA INC./STUDIO ELECTRONICS supplied power

adapter, to ANALOGIA INC. An RMA (Return Material Authorization) number from ANALOGIA INC./STUDIO ELECTRONICS must be obtained first before
returning any product. Email RMA requests to rma@ studioelectronics.com, or call us at [phone] to secure an RMA #. Products shipped to ANALOGIA
INC. without an RMA will be refused and returned. Shipping insurance is optional, but highly recommended.

ANALOGIA INC./STUDIO ELECTRONICS will repair or replace this product at its sole option and at no charge to you for parts and labor—when deemed
necessary and within the warranty period—provided that ANALOGIA INC./STUDIO ELECTRONICS reserves the right to determine whether the product is
“defective” for purposes of this Limited Warranty. This Warranty does not apply if damage to this product occurrs as a result of abuse or misuse, abnormal !

14

Warranty (cont.)

use or handling, improper packaging, another product’s interaction, exposure to temperature extremes, or if the product has been altered or modified/
customized in any way, or the damage was caused by unauthorized repair or service. The original product must return to ANALOGIA INC. unaltered.

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IN NO EVENT SHALL ANALOGIA INC./STUDIO ELECTRONICS BE LIABLE FOR ANY INDIRECT, INCIDENTAL, COLLATERAL, EXEMPLARY, PUNITIVE,
CONSEQUENTIAL OR SPECIAL DAMAGES OR LOSSES ARISING OUT OF YOUR PURCHASE OF PRODUCTS AND/OR OUT OF THIS WARRANTY, INCLUDING
WITHOUT LIMITATION, LOSS OF USE, PROFITS, GOODWILL OR SAVINGS OR LOSS OF DATA, MUSIC, ELECTRONIC FILES, OR PREFERENCES THAT MAY HAVE
BEEN STORED BY A USER OF THE PRODUCT, EVEN IF ANALOGIA INC./ STUDIO ELECTRONICS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGES OR CLAIMS. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES, SO THE
ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU.

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This Limited Warranty and the right of replacement is in lieu of any and all other warranties—which you hereby waive—and it gives
U.S. purchasers specific legal rights. You may also have other rights which vary from State to State.

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ANALOGIA INC., 530 West Palm Ave. El Segundo, CA 90245

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Support and Contact

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[e-mail]

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ANALOGIA INC. - Ardent Proprietors of STUDIO ELECTRONICS

Tel: [phone] • Web: www.studioelectronics.com • General Delivery email: [e-mail]

facebook.com/StudioElectronics • twitter.com/SE_BoomStar • youtube.com/user/StudioElectronics • soundcloud.com/studio-electronics!

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STUDIO ELECTRONICS SYNTHESIZERS