AS123 vs Audio Research Corporation SP8 MkII
The SP8 MkII's output impedance is 1000Ω against the AS123's 600Ω and its input impedance 50000Ω against 470Ω. Both share output voltage (2.0V RMS) and input sensitivity (2.0V RMS).
AI-generated product photo — not official manufacturer imagery.
AmplifiersTube AmplifiersPre-AmplifiersDiscontinued
Estimated price (community-sourced)
$1,950
Around — community and catalog average, updates slowly
About the AS123
The Line Magnetic AS-123 is an Analog Sound tube buffer designed to add warmth and depth to a hi-fi system while improving impedance matching, signal balancing, and system flexibility. It uses a Western Electric replica 197A transformer, point-to-point wiring, and a tube complement of 2x 6K7, 2x 6SN7, and a 5U4/274B rectifier. It is made-to-order with an estimated lead time of about 3 months and is built for 240V operation.
Specifications
Power Specifications
Amplification power output and characteristics
- Input Sensitivity
- 2.0V RMS
- Input Impedance
- 470Ω
Analog Output
Analog signal output specifications
- Output Voltage
- 2.0V RMS
- Output Impedance
- 600Ω
Connectivity
Input and output connections
- Digital Inputs
- RCA
- Analog Inputs
- RCA, XLR
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 480 × 200 × 200 mm (W × H × D)
- Weight
- 18 kg (40 lbs)
- Available Colors
- Grey
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions