Pioneer PRO 8
A Dolby Pro Logic and digital sound field processor with 16 built-in sound fields and independent 4-channel D/A conversion.
Overview
The Pioneer PRO 8, officially designated SP-700D, is a digital sound field processor designed to simulate acoustic environments using computer modeling. It supports 8 surround modes including Dolby Pro Logic Surround and features a digital equalizer with parameter adjustment. The unit uses an integrated early reflection system (I·E·R·S) that accounts for the frequency characteristics of real room surfaces to recreate realistic concert-hall acoustics.
It maintains a complete stereo signal path from input to output, with separate power supply circuits for analog and digital sections to minimize interference. Control is facilitated via the included CU-SP002 remote.
Specifications
| Original price | ¥89,800 (around 1990) |
| Input Sensitivity / Impedance | Line : 63mV/68k Ω |
| Output Level / Impedance | Line : 316mV/5.4k Ω Headphone : 0.25mW/8 ohm |
| A/D converter | 16bit, Sampling frequency: 48 kHz |
| D/A converter | 16-bit, 4-channel independent |
| Digital filter | 4 x oversampling digital filter |
| Frequency characteristic | Processing Front, Rear : 20 Hz to 20 kHz +0 -3dB |
| Distortion Factor (1 kHz) | Processing Front, Rear : 0.008% |
| THD | 0.03% |
| S/N ratio (S = 2 Vrms) | Processing Front, Rear : 90 dB |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption | 26W |
| External dimensions | Width 420 x Height 85 x Depth 335 mm |
| Weight | 5.2kg |
| Attachment | Remote Controller CU-SP002 |
| Equipped with | 7-row motor drive volume |
Design
The PRO 8 uses a unique computer simulation method to model real sound fields, processed through a 50-bit DSP. It features the integrated early reflection system (I·E·R·S) to reproduce reflections similar to those in actual concert venues. The design includes fully separated analog and digital power supplies and a 7-row motor drive volume control for precise signal management.
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