Audio Research
First released in 1976
SP4
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If you make a purchase, Linephaze may receive an affiliate commission.Specifications
amplification technologySolid State
Frequency ResponseHead amp: 5Hz–100kHz,MM: 20Hz-20kHz, High Level: 1Hz–100kHz
Input ImpedanceHead Amp: 10Ω, MM: 47kΩ, High Level: 50kΩ
Output Level10V RMS
Output Impedance<50Ω
Signal to Noise RatioMM: 84dB, High Level: 95dB
Total Harmonic Distortion<0.005%
Dimensions (W x H x D)483 x 216 x 89
Weight5.5 kg