Sidebar 1: Specifications
Signature Mk IIa Tubed line-stage preamplifier. Tube complement: two 12AU7, two 8416, one each 7308, 6922, E88CC, ECC88, 6DJ8 (or 12DJ8 twin triodes). Inputs: 3 pairs RCA line input; 2 pairs balanced/RCA, selectable; 1 pair tape monitor (RCA); 1 pair cinema bypass (RCA); optional, 1 MM, 1 MC (or additional line input if optional phono stage not fitted). Outputs: 2 pairs single-ended (RCA), 2 pairs balanced (XLR, EIA studio standard, pin 2 hot), 1 pair tape (RCA). Gain: 12dB. Absolute phase: correct from all inputs to all outputs. Frequency response: flat over audioband; –3dB bandwidth, 5Hz–210kHz. THD: 0.009% at 1kHz, 1V RMS. Maximum output: >8V RMS. Output impedance: 150 ohms, 20Hz–20kHz. Maximum input: infinite signal (attenuation precedes gain circuitry). Recommended output load: >300 ohms.
Optional Tubed Phono Stage: Tube complement: six 12AX7. Gain: 44dB MM, 64dB MC. Frequency response: RIAA standard, ±0.2dB (20Hz–20kHz); –3dB bandwidth, 10Hz–80kHz. Channel separation: >80dB at 1kHz. Maximum input: >130mV at 1kHz, MM; >13mV, MC. MC load impedance: selectable, 470, 300, 250, 200, 150, 100 ohms. MM load impedance: selectable, 47k, 30k, 25k, 15k, 10k ohms. Overload: 117mV at 1kHz = 8V RMS output; 460mV at 10kHz. Residual noise: 3mV at output (S/N ratio >69dB).
Dimensions: 17.8" (457mm) W by 5.5" (140mm) H by 14.4" (368mm) D (not including knobs and connectors). Power supply: 17.8" (457mm) W by 4.3" (109mm) H by 14.4" (368mm) D (not including connectors). Shipping weight with phono stage: 61 lbs (27.7kg).
Finishes: Black or Silver.
Serial number of unit reviewed: 1433101.
Prices: $19,500, line stage only; $26,000 with phono stage. Approximate number of dealers: 8.
Manufacturer: Valve Amplification Company, 1911 North East Avenue, Sarasota, FL 34234. Tel: (941) 952-9695. Web: www.vac-amps.com.
Optional Tubed Phono Stage: Tube complement: six 12AX7. Gain: 44dB MM, 64dB MC. Frequency response: RIAA standard, ±0.2dB (20Hz–20kHz); –3dB bandwidth, 10Hz–80kHz. Channel separation: >80dB at 1kHz. Maximum input: >130mV at 1kHz, MM; >13mV, MC. MC load impedance: selectable, 470, 300, 250, 200, 150, 100 ohms. MM load impedance: selectable, 47k, 30k, 25k, 15k, 10k ohms. Overload: 117mV at 1kHz = 8V RMS output; 460mV at 10kHz. Residual noise: 3mV at output (S/N ratio >69dB).
Dimensions: 17.8" (457mm) W by 5.5" (140mm) H by 14.4" (368mm) D (not including knobs and connectors). Power supply: 17.8" (457mm) W by 4.3" (109mm) H by 14.4" (368mm) D (not including connectors). Shipping weight with phono stage: 61 lbs (27.7kg).
Finishes: Black or Silver.
Serial number of unit reviewed: 1433101.
Prices: $19,500, line stage only; $26,000 with phono stage. Approximate number of dealers: 8.
Manufacturer: Valve Amplification Company, 1911 North East Avenue, Sarasota, FL 34234. Tel: (941) 952-9695. Web: www.vac-amps.com.
