Lachapell audio 583 series vacuum tube preamplifier modules for microphones and instruments (model’s 583e & s). Preliminary operating manual.
Stated below are a few areas that you must take the time to read before you install and use your 583. You as the owner/user are responsible for completely understanding how to operate this device safely and properly. Unpacking: inspect thoroughly. Although we take extreme care at final assembly and ...
Controls: all toggle switches will illuminate red when their associated function is active . 2 input: drives more or less current into the tube stage. Output: drives more or less cur- rent into the cleaner output stage. 48v: supplies 48 volts of dc current for condenser micro- pad: reduces microphon...
Internal gain, microphone: 0 to >70db internal gain, hi-z: 0 to >50db maximum output: +26dbu (1% thd+n) frequency response: 12hz to >70khz (-3db) thd+n: noise (ein): -120db (rg. 150ohm, hp22) input impedance (mic): 1.5kohm input impedance (hi-z): 40kohm tube complement: (1) ecc83/12ax7 output impend...
Block diagrams: model 583e diagram microphone input -20db pad control phantom (+48v) control direct input (unbalanced) input gain output gain polarity control polarity tube amp balanced output input select -20db pad phantom model 583s diagram.
Warranty: lachapell audio warrants that for a period of one year after the date of delivery, the products delivered hereunder shall perform in accordance with the written product specifications current as of the date of shipment and under normal use shall be free from defects arising from selection ...
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