Thalia vs Audio Research Corporation SP4
The SP4's signal-to-noise is 84 dB against the Thalia's 82 dB, its thd 0.005% against 0.015%, and its input sensitivity 1.0V RMS against 3.2V RMS. Both share output voltage (2.0V RMS).
AI-generated product photo — not official manufacturer imagery.
AmplifiersPre-AmplifiersPhono Pre-AmpsDiscontinued
Estimated price (community-sourced)
$375
Around — community and catalog average, updates slowly
About the Thalia
The Thalia is a servo-loop stereo preamplifier designed by Great American Sound (GAS) in 1977–78. It features a fully complementary symmetry design, multiple line inputs, a tape loop, and dual phono inputs with a high-quality moving magnet (MM) phono stage. The volume, bass, and treble controls use precision discrete resistors rather than potentiometers, offering repeatable settings and long-term reliability. The tone controls are located in the feedback loop for minimal phase shift, and a four-position low-frequency filter allows for tailored bass response. The preamp is DC-coupled after input isolation capacitors and uses servo-amplifiers outside the audio path to maintain zero DC interstage voltages. It is designed to pair seamlessly with GAS power amplifiers and is regarded for its sonic performance and build quality.
Specifications
Analog Output
Analog signal output specifications
- THD
- 0.015%
- SNR
- 82 dB
- Output Voltage
- 2.0V RMS
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 483 × 89 × 254 mm (W × H × D)
- Weight
- 7.7 kg (17 lbs)
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions