Symmetrical vs Balanced Audio Technology REX
The REX's signal-to-noise is 100 dB against the Symmetrical's 95 dB, its thd 0.005% against 0.030%, and its output impedance 200Ω against 70Ω. Both share class (Tube).
AI-generated product photo — not official manufacturer imagery.
Symmetrical
NAT AudioAmplifiersPre-AmplifiersTube Amplifiers
Estimated price (community-sourced)
$10,980.80
Around — community and catalog average, updates slowly
About the Symmetrical
The NAT Audio Symmetrical is a high-end tubed line preamplifier with a dual-mono, fully balanced circuit operating in pure Class A triode mode without loop feedback. Its 12-tube complement includes 6N30P-DR and 6N1P-VI tubes in the signal path, along with 6X4WA rectifiers and OA2 voltage stabilizers. The preamplifier provides six inputs, each accepting balanced or single-ended connections, via gold-plated RCA and XLR connectors. A relay-switched resistor-ladder volume control provides precise attenuation, while the supplied remote handles volume and mute functions. It uses custom toroidal transformers, audiophile-grade capacitors, and an aluminum chassis with heatsink side panels. Published specifications include a frequency response of 0.07Hz–300kHz ±3dB, signal-to-noise ratio above 95dB (A-weighted), and THD+N below 0.03% at 1V RMS. The unit measures approximately 18.8 × 6.4 × 17.7 inches (483 × 165 × 455mm) and weighs about 37.4lb (17kg).
Specifications
Power Specifications
Amplification power output and characteristics
- Amplifier Class
- tube
- Input Impedance
- 47Ω
- Max Input Voltage
- 1.0V RMS
Analog Output
Analog signal output specifications
- THD
- 0.030%
- SNR
- 95 dB
- Output Voltage
- 1.0V RMS
- Output Impedance
- 70Ω
Connectivity
Input and output connections
- Analog Inputs
- balanced, single-ended
- Analog Outputs
- balanced, single-ended
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 483 × 165 × 455 mm (W × H × D)
- Weight
- 17 kg (37 lbs)
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions