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Summary of Contents for Digital Audio Labs LACHAPELL AUDIO 983S MK2
- Page 1 LACHAPELL AUDIO 983S MK2 USER GUIDE Two Channel Vacuum Tube Preamplifier for Microphones and Instruments Version 1 February 2019 1266 Park Road Chanhassen, MN 55317 952-401-7700 support@digitalaudio.com www.digitalaudio.com...
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Page 2: Safety Instructions
SAFETY INSTRUCTIONS TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER. CONTACT DIGITAL AUDIO LABS FOR SERVICING. The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated and/or potentially dangerous voltage within the products enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. -
Page 3: Digital Audio Labs Limited Warranty
Digital Audio Labs warrants their products against defects in material and workmanship for a period of two years from date of purchase. During this period, Digital Audio Labs will, at its option, repair the defective unit or replace it with a new or rebuilt one. -
Page 4: Table Of Contents
CONTROL DETAILS ................................5 GETTING STARTED ..................................6 983 FREQUENCY RESPONSE ..............................7 HPF - 50HZ ....................................7 HPF - 150HZ....................................7 LPF - 5KHZ ....................................7 LPF - 10KHZ ....................................7 LACHAPELL AUDIO 983S MK2 SPECIFICATIONS ......................8 LACHAPELL AUDIO SUPPORT ..............................8 LACHAPELL AUDIO MODEL 983S MK2... -
Page 5: Introduction
• UNPACKING: Inspect thoroughly. Although we take extreme care at final assembly and packing, things can happen during transit. It is very important that you contact Digital Audio Labs if there is anything broken or damaged upon receipt of package. Included in every package should be: (1) preliminary operating manual, (1) packet of mounting screws, (1) registration card. -
Page 6: Safety Precautions
• Do not place the 983S MK2 in an area where there is a potential for fluids to fall, spill onto or come in contact with the 983S MK2. If you notice fluids or moisture present inside the unit DO NOT turn power on! Contact Digital Audio Labs for direction. LACHAPELL AUDIO MODEL 983S MK2... -
Page 7: Controls
CONTROLS LEVEL HI-Z LOW-PASS TRUE48 CHANNEL CONTROL INPUT FILTER PHANTOM MUTE POWER POWER TUBE DRIVE VU METER HIGH-PASS -20 dB POLARITY CONTROL FILTER REVERSE CONTROL DETAILS • TUBE DRIVE: TUBE DRIVE controls how much of the source signal is fed to the vacuum tube. Higher levels will drive the tube harder and result in more harmonics. - Page 8 BACK PANEL CONNECTORS AC POWER IN LINE LINE INPUT OUTPUT INPUT OUTPUT BACK PANEL CONNECTOR • AC POWER IN: Connect the included AC power supply to the AC POWER IN. Press it until it locks into place. To disconnect the power supply, press the locking mechanism on the AC POWER connector.
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Page 9: Getting Started
GETTING STARTED CLEAN GAIN, HIGH HEADROOM With the TUBE-DRIVE knob set at around 25% and LEVEL (output) around 75%, with the PAD off, you will get a very clean and pristine sound. The distortion is very low with no added harmonics and there is a ton of headroom. -
Page 10: Hpf - 50Hz
983S MK2 FREQUENCY RESPONSE HPF - 50HZ HPF - 150HZ LPF - 5KHZ LPF - 10KHZ LACHAPELL AUDIO MODEL 983S MK2... -
Page 11: Lachapell Audio 983S Mk2 Specifications
LACHAPELL AUDIO 983S MK2 SPECIFICATIONS Internal Gain (microphone) 72.5dB Internal Gain (Hi-Z) 53.8dB Max output gain +27.8dBu (1% THD+N, 22Hz - 20kHz) Frequency Response 9Hz - 40kHz Variable: 0.01% - 18% (per tube drive (input) gain control THD+N with -40dBu input at 1Khz) - Page 12 ® 2014, 2015 Digital Audio Labs. ™ & © 2017, 2018 Digital Audio Labs. Patents pending.
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