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The Artemis Labs LA-1 Line Pre Amp combines the clean, accurate sound
of a purist single-triode line amplifier with the convenience and reliability
of a solid, well-built product. Special care is taken with all parts
in the audio path, from the Goldpoint™ stepped attenuator to the
Swedish output chokes by Lundahl. The sonic clarity and detail are outstanding.
Key Features:
5 inputs, 2 outputs
Five stereo inputs available at the flick of a switch. Two pairs
of RCA output jacks allow connections to sub-woofer
or signal processor, as well as power amplifier.
12dB maximum gain
Provides adequate gain for most sources without the hum and noise caused by excessive gain.
Goldpoint™ stepped attenuator volume control
Series-type stepped attenuator using precision metal-film resistors by Dale
and switch mechanism by Elma (Swiss).
Dual conductive-plastic balance controls
A separate potentiometer is used to balance each channel. This allows maximum
gain in the normal balanced condition and permits the use of high-quality
conductive plastic pots with no sonic degradation yet infinite resolution.
Mono/Stereo switch with LED indicator
The left and right channels can be merged, with a yellow LED indicating the
mono condition.
One 5687 tube per channel in Cool-Swap™ Configuration
An idle spare in each tube, plus tubes run cooler.
Choke loads for each triode
Allows tubes to run in their most linear mode and permits lower plate supply voltage
Low-Gain MOSFET high voltage regulation
One regulator per channel minimizes cross-talk and gives a firm, stable sound without sounding “solid-state”.
All Artemis PreAmps Designed and built in the United States using the best parts from around the world.
Specifications
Maximum Gain (47K load, 1KHz):
12dB +/- 1.5dB
Frequency Response & Distortion:
 Worst-case Loading (8K ohms, 1000pF):
Worst-case settings (Input Attenuator and Balance both at -6dB):
Frequency Response: < 10Hz – 32KHz +/- 0.5dB
Average settings (Input Attenuator at -16dB, Balance at -1.5dB):
Frequency Response: < 10Hz – 40KHz +/- 0.5dB
THD+N at 1KHz, 2Vrms output: < 0.12%
Average Loading (47K ohms, 250pF):
Worst-case settings (Input Attenuator and Balance both at -6dB):
Frequency Response: < 10Hz – 45KHz +/- 0.5dB
Average settings (Input Attenuator at -16dB, Balance at -1.5dB):
Frequency Response: < 10Hz – 60KHz +/- 0.5dB
THD+N at 1KHz, 2Vrms output: < 0.05%
Maximum output voltage (47K load, 1KHz, 0.5% THD): 40Vrms
Output Noise (grounded input, 47K load, rms detector):
22Hz - 30KHz: < -82dB below 2Vrms output
”A-weighted”: < -85dB below 2Vrms output
Crosstalk:
1KHz: < -75dB
20KHz: < -45dB
Effective Output Impedance: approx. 750 ohms (1KHz)
Input Impedance: 30K to 50K ohms, depending on Input Attenuator and Balance control settings.
Mains Voltage: Wired at factory for one of the following voltages: 100, 110, 120, 220, 230, 240V, 50 to 60Hz.
Power Consumption (rms) : 30 Watts nominal, 38 Watts maximum.
Size: 6 ½" (165 mm) Height, 8 ½" (216 mm) Width, 14 5/8" (371 mm) Depth.
Mass: 22 lbs. (10Kg)
Product Literature (pdf format)
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