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OSCA Vintage Collection

*RARE* 90's AudioControl ESP-3 Image Amplifier Analogue Imaging Processor (NOS)
*RARE* 90's AudioControl ESP-3 Image Amplifier Analogue Imaging Processor (NOS)
*RARE* 90's AudioControl ESP-3 Image Amplifier Analogue Imaging Processor (NOS)
*RARE* 90's AudioControl ESP-3 Image Amplifier Analogue Imaging Processor (NOS)
*RARE* 90's AudioControl ESP-3 Image Amplifier Analogue Imaging Processor (NOS)
*RARE* 90's AudioControl ESP-3 Image Amplifier Analogue Imaging Processor (NOS)
*RARE* 90's AudioControl ESP-3 Image Amplifier Analogue Imaging Processor (NOS)
*RARE* 90's AudioControl ESP-3 Image Amplifier Analogue Imaging Processor (NOS)

Vendor:AudioControl

*RARE* 90's AudioControl ESP-3 Image Amplifier Analogue Imaging Processor (NOS)

Sale price$390.00Regular price $699.00

Early-1990s AudioControl ESP-3 Image Amplifier & Centre Channel Processor | New Old Stock (NOS) Vintage Car Audio

The AudioControl ESP-3 is a specialist American-made car audio signal processor from the early 1990s, developed to enhance stereo imaging, soundstage width and the sense of space within a vehicle. Combining centre-channel image processing with AudioControl's Spatial Restoration circuitry, the ESP-3 was designed to create more focused vocals and a wider listening experience. Its separate dashboard controller allows the driver to adjust both effects, while the main processor remains discreetly installed elsewhere in the vehicle. An unusual example of the advanced analogue audio processing available to serious enthusiasts before modern digital DSP systems became widespread.

New Old Stock (NOS) condition: Unused vintage stock exceptionally well preserved in its original AudioControl packaging, protective foam inserts and wrapping. Includes original dashboard controller, connecting cable and signed factory quality-control card.

All OSCA Vintage Series products have been professionally powered-on and functionally bench-tested ✅

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Product details

Advanced Specifications
  • Brand: AudioControl
  • Model: ESP-3
  • Product Name: Image Amplifier
  • Product Type: Analogue stereo imaging and centre-channel signal processor
  • Era: Early 1990s
  • Processing Functions: Spatial Restoration and centre-channel Image Amplification
  • Remote Control: Two-knob dashboard Image Control
  • Remote Adjustments: Image Amplification and Spatial Enhancement
  • Onboard Adjustments: Bass, midrange and treble spatial shaping; centre-channel level matching
  • Audio Inputs: Left and right RCA
  • Audio Outputs: Left/right restored, left/right through and two identical mono centre-channel outputs
  • Maximum Output Level: 7.5V
  • Frequency Response: 10Hz–50kHz, ±0.5dB
  • Total Harmonic Distortion: 0.03%
  • Signal-to-Noise Ratio: 110dB (manufacturer quoted)
  • Input Impedance: 20kΩ
  • Output Impedance: 150Ω
  • Power Supply: Optically isolated, transformer-coupled switching DC/DC converter
  • Maximum Current Draw: 500mA
  • Operating Supply: 12V vehicle electrical system
  • Main Unit Dimensions: Approximately 178 × 142 × 30mm
  • Manufacture: Made in USA
Key Features
  • Centre-Channel Image Amplification processes stereo information to create a more stable and focused centre image.
  • Spatial Restoration Technology enhances the sense of width and ambience in the original stereo recording.
  • Dual Dashboard Controls allow convenient adjustment of imaging and spaciousness from the driver's seat.
  • Dedicated Centre-Channel Outputs support an additional amplified front-centre speaker.
  • Adjustable Spatial Tone Shaping provides bass, midrange and treble control over the restoration effect.
  • Optically Isolated Power Supply helps prevent vehicle electrical noise from entering the audio signal.
OSCA Fun Fact

Whatever you do, don't deep-fry your stereo! AudioControl's original packaging carried some rather unusual handling instructions, including warnings against refrigeration, deep-frying and sautéing. The company's playful advertising was part of its distinctive identity during the early 1990s, standing out in an industry increasingly focused on technical specifications and competition credentials.
AudioControl ESP-4 Owners Manual

The Art of the Soundstage

During the early 1990s, high-end car audio enthusiasts were experimenting with ways to reproduce the imaging and spaciousness of a proper home hi-fi system inside a vehicle. AudioControl, an American manufacturer known for specialist signal processing, approached the challenge through dedicated analogue circuitry and precise installation techniques. The ESP-3 reflected this era of experimentation, offering separate centre-channel processing and spatial enhancement long before modern DSP calibration became commonplace. It represents a time when achieving a convincing soundstage required specialist equipment, careful speaker placement and considerable tuning knowledge.

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