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ARP Explorer I

Analog monophonic synthesizer

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Explorer I 1Explorer I 2Explorer I 3Explorer I 4
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ARP Explorer I
ARP Explorer I
1 100.00 street price

Explorer I is a small preset monophonic analog synthesizer, a very "close relative" to PRO-Soloist, but has a very important difference - manual mode.

The unit contains factory presets: flute, trumpet, clarinet, strings, pulsar and lunar. In the manual mode, individual settings for all function blocks are available:

For a voltage controlled oscillator (VCO), a waveform ("brass" - saw, "hollow"/"reed"/"fuzz") is selected and a signal of the built-in pink noise source can be selected.

The section of the envelope generator is common for VCF and VCA featuring the timing of attack, decay, sustain and release.
For voltage controlled low-pass filter (LP VCF), cutoff, resonance, modulation depth by LFO and envelope generator are available. As well as in PRO-Soloist, ARP4034 module was used as the filter, which is considered the most successful filter made by ARP back then. The four-step VCF structure provides a cutoff slope of 24 dB per octave. At high resonance values, the filter enters the self-oscillation mode.

The low frequency oscillator (LFO) has a frequency adjustment and a generator restart switch (LFO starts generating after each key press).

The second LFO, designed to create a vibrato effect, has a switch and a frequency controller.
Portamento and pitch bend (here – a common rotary knob) regulators are also available.

ARP Explorer was used in the works of Philip Glass and Herbie Hancock.

Country of origin / production: USA

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Usage area
Synthesizer 
Usage Design/ Form Factor
With Keys 
Archetype
Analogue (A) 
Polyphony
Monophonic 
Tone Generator / Sound Synthesis
Oscillator Type VCO (Voltage Controlled Oscillator)
Oscillators per voice1
Waveform/ Spectral form (main generator) Pulse Width Modulation (PWM)
Waveform/ Spectral form (main generator) Saw
Programs/ Voices/ Timbres
Single Voice Preset4
User-defined Single Voice1
Filter
Voltage Controlled Filter (VCF) 
Low-pass Filter (LPF) 
4-pole 
24dB 
Resonance 
Envelope Generator (EG)
FilterADSR
AmpADSR
Arpegiator/ Portamento
Portamento 
Keys
Type Synth Action
Size3
Number of Keys37
Built-in controllers
Pitch Bend Wheel 
Audio out
Mono 
Analogue: 1/4" (6.35mm)2
Power
Voltage 220V
Voltage 110V
Voltage 50-60Hz
Power Supply Built-in, internal
Case/ body
Metal&wood 
Color
Black 
Production start1974
Production end1978
Production ended

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