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The Convergent Audio SL-1 Ultimate is the result of decades of refinement to the original SL-1, introduced in 1985. It is designed to eliminate electronic artifacts and allow superior audio systems to reach their full potential. The SL-1 Ultimate features a robust steel chassis with internal damping compound for resonance control, high-quality Cardas RCA jacks, and a stepped attenuator volume control manufactured in-house. It uses five tubes: a matched pair of 6922s, a single 6922, and a matched pair of 12AX7s. The preamp is single-ended only, with no balanced outputs. The balance control uses resistor-based 0.5dB steps over a 5dB range, and the unit includes a mute switch. The SL-1 Ultimate is highly regarded for its open, dynamic, and quiet sound, making it a reference choice for discerning audiophiles.
Analog signal output specifications
Phono stage specifications
Size, weight, and appearance
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The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The VK-33's signal-to-noise is 90 dB against the Convergent Audio SL-1 Ultimate's 98 dB, its thd 0.010% against 0.001%, its output voltage 30.0V RMS against 50.0V RMS, and its output impedance 1Ω against 100Ω.
The EVO 400 Preamp's signal-to-noise is 93 dB against the Convergent Audio SL-1 Ultimate's 98 dB, its thd 0.500% against 0.001%, and its output impedance 256Ω against 100Ω. Both share class (Tube).
The ATC-2's signal-to-noise is 90 dB against the Convergent Audio SL-1 Ultimate's 98 dB, its thd 0.010% against 0.001%, its output impedance 200Ω against 100Ω, and its output voltage 2.0V RMS against 50.0V RMS.
The LS 36.5's signal-to-noise is 125 dB against the Convergent Audio SL-1 Ultimate's 98 dB, its output impedance 110Ω against 100Ω, and its weight 12.25 kg (27 lbs) against 29.1 kg (64 lbs). Both share input impedance (50000Ω).
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