Artemis LA-1 User Manual

Artemis Labs LA-1

Operating Manual

Important Safety Instructions

CA UT IO N

RIS K OF ELEC TRIC SHO CK

DO N O T O PEN

AT TE NT IO N

RISQU E DE CHOC ELECT RIQUE

NE P A S O UVRI R

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with a dry cloth.

7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instruc­tions.

8. Do not install near any heat sources such as radiators, heat registers, stoves, or other appa­ratus (including amplifiers).

9. Do not defeat the safety purpose of the grounding-type plug. A grounding-type plug has two
blades and a third grounding prong. The third prong is provided for your safety. If the provided
plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.

10. Protect the power cord from being walked on or pinched particularly at plugs, convenience
receptacles, and the point where they exit from the apparatus.

11. Only use attachments/accessories specified by the manufacturer.

12. Unplug this apparatus during lightning storms or when unused for long periods of time.

13. Refer all servicing to qualified service personnel. Servicing is required when the apparatus
has been damaged in any way, such as if the power-supply cord or plug is damaged, liquid has
been spilled inside the appliance or it has been exposed to moisture, the appliance does not
operate normally, or has been dropped.

14. WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain
or moisture.

Explanation of Safety Symbols:

CAUTION: To reduce the risk of elec­tric shock, do not remove the covers.
No user-serviceable parts inside.
Refer Servicing to qualified service
personnel.

This symbol is intended to alert the user to the presence of
uninsulated “dangerous voltage” within the product’s enclosure
that may be of sufficient magnitude to constitute a risk of elec­tric shock to persons.

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This symbol is intended to alert the user to the presence of
important operating and maintenance (servicing) instruction in
the literature accompanying the appliance.

INTRODUCTION & SPECIFICATIONS

The Artemis Labs LA-1 Line Amplifier 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.
All aspects of the design were done by John Atwood of One Electron™.

The LA-1 is conservatively designed and is built to last for many years. The only maintenance needed is
the occasional replacement of tubes, and even this has been reduced by the use of Cool-Swap™ technology.
Please read this entire user’s manual so that you can understand all the features and get the most from the
LA-1. The Warranty is on a separate card. Read it and send it in to get full warranty coverage.

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.

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Size: 6 ½" (165 mm) Height, 8 ½" (216 mm) Width, 14

Mass: 22 lbs. (10Kg)

Note: These specifications are subject to change at any time.

⁄8 " (371 mm) Depth

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