AS133 vs NAT Audio Symmetrical
The Symmetrical's signal-to-noise is 95 dB against the AS133's 90 dB, its thd 0.030% against 0.300%, and its output impedance 70Ω against 50000Ω. Both share class (Tube).
AI-generated product photo — not official manufacturer imagery.
AmplifiersPre-AmplifiersTube Amplifiers
Estimated price (community-sourced)
$4,500 - $12,000
Around — community and catalog average, updates slowly
About the AS133
The Line Magnetic AS-133 is a high-end vacuum tube preamplifier sold under the Analog Sound by Line Magnetic branding. It uses a Western Electric-inspired design with 6SN7 and 2A3 tubes, a 5U4G rectifier, and transformer-coupled circuitry aimed at high fidelity, flexible gain adjustment, and wide compatibility with power amplifiers. Listings and retailer descriptions identify it as a premium preamp with multiple inputs, balanced and single-ended outputs, and substantial chassis construction.
Specifications
Power Specifications
Amplification power output and characteristics
- Amplifier Class
- tube
- Input Sensitivity
- 1.0V RMS
- Input Impedance
- 100000Ω
Analog Output
Analog signal output specifications
- THD
- 0.300%
- SNR
- 90 dB
- Output Impedance
- 50000Ω
Connectivity
Input and output connections
- Bluetooth
- No
- Wi-Fi
- No
- Ethernet
- No
- Analog Inputs
- XLR, RCA
- Analog Outputs
- RCA
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 485 × 240 × 460 mm (W × H × D)
- Weight
- 22 kg (49 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