Single channel half rack vacuum tube preamplifier for microphones and instruments (12 pages)
Summary of Contents for LaChapell Audio 500DT
Page 1
LACHAPELL AUDIO 500DT USER GUIDE Version 1.0 May 2018 1266 Park Road Chanhassen, MN 55317 952-401-7700 support@digitalaudio.com www.digitalaudio.com...
The manufacturer cannot be held responsible for damages caused to persons, personal • possessions, or data due to an improper or missing ground connection. LACHAPELL AUDIO 500DT...
Appropriate shipping charges will be applied. We require payment in advance of repair by credit card; we accept Visa and Master Card. In the event the charges are over the minimum charge, DAL will contact you and inform you of the cost of the repair before any work is completed. LACHAPELL AUDIO 500DT...
DIGITAL AUDIO LABS LIMITED WARRANTY ................1 REPAIR POLICY ........................1 WARRANTY SERVICE ......................1 NON-WARRANTY SERVICE ....................1 LACHAPELL AUDIO MODEL 500DT ..................3 BEFORE YOU GET STARTED ....................3 SAFETY PRECAUTIONS ...................... 3 500DT DUAL TOPOLOGY CONTROLS ..................4 CONTROLS ........................
• Do not place the 500DT in an area where there is a potential for fluids to fall, spill into or come in contact with the 500DT. If you notice fluids or moisture present inside the 500DT DO NOT turn power on! Contact Digital Audio Labs for direction.
500DT DUAL TOPOLOGY CONTROLS INPUT GAIN OUTPUT GAIN BLEND PHANTOM POWER POLARITY REVERSE HI-Z INPUT CONTROLS • INPUT GAIN: The GAIN controls how much of the source signal is fed to the preamplifer. • OUTPUT GAIN: The OUTPUT GAIN controls the overall output of the preamplifer. By using both the INPUT GAIN and OUTPUT GAIN together, a wire variety of sound options are possible.
USING THE 500DT A properly powered vacuum tube, like the one in the LaChapell Audio 500DT, will give you lots of clean headroom with some added harmonic richness and compression as you increase the gain. At higher input gains and/or with hot signals, the tube on the 500DT will go into overdrive providing tube distortion.
OPAMP path. GUITAR Try using the 500DT as the front end to a guitar modeler. With the INPUT GAIN up, you can add some true tube distortion to your tracks. With the INPUT...
GAIN more, with the BLEND OUTPUT GAIN to accentuate OUTPUT GAIN so that it closer to the OPAMP path. a proximity effect on a doesn’t clip the converters and then play with the BLEND condenser mic. in the 30%-60% range. LACHAPELL AUDIO 500DT...
SOLID STATE PATH THD+N 0.01% FREQUENCY RESPONSE 20 Hz to 46 kHz MAXIMUM OUTPUT 28 dBu TYPICAL EIN NOTE: Stated specifications are typical measurements but subject to change without notice due to individual traits unique to each tube. LACHAPELL AUDIO 500DT...
TROUBLESHOOTING COMMON ISSUES The 500DT is capable of a lot of gain. Distortion can be occuring in the DAW or Converter or in the 500DT itself. First try reducing the OUTPUT GAIN My signal sounds distorted. to minimize any non-500DT related distortion. Next reduce the INPUT GAIN.