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The Phono 2-SB remains LKV's best-selling product. While the Veros One is better, the 2-SB's aggressively low price and its continual improvement yields a classic audiophile component.
Designed to Make Music
Designed to Make Music
The revised Phono 2-SB is LKV’s instrumentation-grade, state-of-the-art phono preamplifier, designed to enable your system to convey the emotion, drama and beauty of the music.
The 2-SB delivers very low noise and distortion, preserving the low-level detail encoded on an LP. This subtle information conveys much of the meaning and emotion of the music and creates a sound stage and solid, palpable images.
The final selection of components was determined by days of careful listening and tuning of numerous prototypes.
Revisions of the Phono 2-SB’s circuits were based on the development of LKV’s premier phono stage, the Veros One.
Dynamic Headroom accommodates the wide dynamic swings of music with neither strain nor compression.
AZF Circuit provides Zero Loop feedback and discrete, Class A gain circuitry for transparent, relaxed sound.
Accurate RIAA Equalization achieved through a filter network composed of precision metal film resistors and 1% tolerance polypropylene capacitors.
Flexibility to function properly in a very wide variety of systems, accommodating almost all cartridges, especially low-output, moving-coil models.
External Power Supply and Dual-Mono Topology minimize noise and crosstalk.
Phono 2-SB Features
Phono 2-SB Features
Phono 2-SB Specifications
Phono 2-SB Specifications
AZF Circuit. Fully differential, class A, zero feedback gain blocks implemented with low-noise JFETs without need for step-up transformers
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External power supply with custom designed toroidal power transformer and low-noise HEXFRED rectifier diodes delivers seven stages of power regulation and filtering.
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Cascode gain circuitry, stiff current source biasing and hand matched JFETs (Idss less than ± 0.1 mA) minimize distortion.
High current JFET output buffer drives long cables and low impedances.
Extensive on-board voltage regulation and filtering assure clean, stable power supply rails for the gain circuitry.
Soft start protection reduces component failure.
Differential (balanced) amplifier circuits block noise.
Dual mono construction with separate circuit boards decrease crosstalk and enhance imaging.
Four-layer circuit boards shorten the signal path length and connect grounds to the same plane cutting noise.
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1% tolerance metal film resistors.
Polypropylene dielectric signal path capacitors.
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Balanced (XLR) Input & Output Connectors.
Single-Ended (RCA) Input & Output Connectors.
Input Impedance:
- 50 ohms to 47 kohms selectable
Gain:
- Balanced: 46 / 56 / 65 dB selectable
- Single-Ended: 40 / 50 / 59 dB selectable
Output Impedance:
- Balanced: < 200 ohms
- Single-Ended: < 100 ohms
Signal to Noise Ratio: Audio band, Inputs shorted, Referenced to 0.5 mV:
- Balanced: > 83 dB at 45 dB gain
- Balanced: > 63 dB at 65 dB gain
- Single-Ended: > 83 dB at 40 dB gain
- Single-Ended: > 63 dB at 50 dB gain
THD, 1 kHz, All Gain Settings:
- Balanced, 2 V Output: 0.008 %
- Single-Ended, 1 V Output: 0.008 %
Crosstalk, 5 mV, 10 kHz, One Channel:
- Balanced: Better than -90 dB, R to L, L to R
- Single-Ended: Better than -90 dB, R to L, L to R
RIAA Equalization Error:
- 20 to 50 kHz: ± 0.1 %
Dimensions, Main Unit:
- W: 43 cm, D: 33 cm, H 10 cm
- W: 17 inches, D: 13 inches, H: 4 inches
- 4.3 kg, 9.5 pounds
Dimensions, External Power Supply:
- W: 15 cm, D: 33 cm, H 10 cm
- W: 6 inches, D: 13 inches, H: 4 inches
- 3 kg, 7 pounds
- One meter, umbilical cable
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