SP9 vs Pioneer SPEC-1
The SPEC-1's thd is 0.050% against the SP9's 0.010% and its output impedance 600Ω against 500Ω. Both share output voltage (2.0V RMS) and input impedance (50Ω).
AI-generated product photo — not official manufacturer imagery.
AmplifiersPhono Pre-AmpsTube AmplifiersDiscontinued
About the SP9
The Audio Research SP9 is a hybrid stereo preamplifier introduced in 1987, using two 6DJ8/ECC88 tubes in conjunction with a solid-state FET output stage. Its phono section provides RIAA equalization, adjustable cartridge resistance and capacitance, and 67dB gain to the main outputs, supporting moving-magnet and suitable moving-coil cartridges. The line stage offers a 5Hz–50kHz frequency response, while the phono response is 30Hz–40kHz, with total harmonic distortion specified at approximately 0.01%. The SP9 includes multiple line-level inputs, tape-monitor facilities, regulated power supplies, and a toroidal power transformer. It is a discontinued high-end preamplifier known for combining tube-based signal processing with solid-state drive capability.
Specifications
Power Specifications
Amplification power output and characteristics
- Input Impedance
- 50Ω
Analog Output
Analog signal output specifications
- THD
- 0.010%
- Output Voltage
- 2.0V RMS
- Output Impedance
- 500Ω
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 480 × 134 × 260 mm (W × H × D)
- Weight
- 5.9 kg (13 lbs)
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions