E DAX Audio labs OPERATING MANUAL Vacuum Tube Microphone Preamplifier PEAK HOLD (Re-AmpTube) Min LINE Max E DAX Vacuum Tube Microphone Preamplifier Audio labs WWW.EDAXAUDIO.
SAFETY AND OPERATING PRECAUTION Important Information: This symbol indicates the presence of dangerous voltage within the product enclosure that presents the risk of electric shock injury. When this symbol appears next to an operation discussed in this manual, only qualified technical personnel should perform that operation . This symbol indicates important operating or maintenance instructions that should be read carefully.
INTRODUCTION The VTP-100 offers microphone and line inputs via Neutrik XLR/TRS combo jacks.
CONTENTS SAFETY and OPERATING PRECAUTIONS...........................................................................1 INTRODUCTION......................................................................................................................2 TABLE OF CONTENTS...........................................................................................................3 FEATURES..............................................................................................................................
FEATURES * Pure class A Tube design with 4 cell parallel triodes. * Fully balanced transformerless mic input and outputs. * High headroom +32dB. * Discrete output stage headphone amplifier. * Hi-Z Reamp-Tube output with variable trim. * High precision active balanced output circuit. * High impedance instrument input Vacuum Tube Direct-Box * 11 position sealed rotary gain switch 4dB steps * 11 position sealed rotary passive 12dB/Oct HP Filter (20-250Hz). * High quality conductive plastic output attenuator.
INSTALLATION 5.1 Unpacking and Inspection We recommend that you inspect your VTP-100 upon unpacking it from the factory shipping carton. In the unlikely event that the unit exhibits any physical damage, DO NOT connect it to the AC mains power, but contact your dealer immediately. The shipping carton should contain the following items: the VTP-100 Preamp,an IEC 3 Prong power cord, and this operating manual.
FRONT PANEL 4 3 1 2 5 6 8 7 PEAK HOLD (Re-AmpTube) Min LINE Max E DAX Vacuum Tube Microphone Preamplifier Audio labs 9 10 11 12 13 1) GAIN Mic/Line: An 11 position rotary switch that controls the gain of the discrete input stage. 2) Ovl led: The Red Led iluminate when the input level exceeds the maximum XLR input level which is 3 dB below the overload point. 3) Phantom led: The Yellow Led iluminate when the phantom power is on.
REAR PANEL CONTROL 2 VOLTAGE SELECTOR 3 V T P - 10 0 email:contact@edaxaudio.com http://www.edaxaudio.
PREAMPLIFIER OPERATION 8.1 Turning the power ON The power switch is located on the VTP-100 front panel.Turn on the power switch, the meter iluminates red. The VTP-100 has a 30 seg Soft-start warm-up with relay output muting after this time the unit are ready to work. 8.2 Setting the gain First, turn the gain control fully counter-clockwise and check that the 48V phantom power is off. Connect a microphone and then turn on the phantom power if required.
REPLACING THE TUBES The vacuum tubes become very hot once the unit has been turned on, and they should not be touched until they have cooled to room temperature. There are a large variety of ECC82/12AU7s available, each type has slightly different internal structure and design. Consequently, each type has its own sonic signature. For the design of the VTP-100 we have chosen an especial tube modele this gives to the VTP-100 its special sound characteristic.
SPECIFICATIONS Input Impedance(microphone): 2k2 ohm,nominal. Input Impedance(direct input):1Mohms (Instrument). Maximum input level:+23dBu into 10Kohms. Maximum input level(DI-BOX):+10dBu. Maximum output level:+32dBu into 10Kohms. Output impedance:47ohms x 2. Frequency Response: -1.0dB 20Hz and 20kHz with 10Kohm load. Noise: EIN than -125dBu with 150 ohm input load, unweighted. Distortion: THD+N less than 0.02%, +35dB gain Meter: Line input VU/PPM and VU/PPM output level and PPM Hold.
WARRANTY Edax Audio Labs warrants to the first purchaser of a new VTP-100 Vacuum tube preamplifier that the unit is free of manufacturing defects in materials and workmanship fora period of one (1) year from the date of purchase. Edax Audio Labs sole obligation under this warranty shall be to provide, without charge, parts and labor necessary to remedy defects, if any, which appear within one (1) year from the date of purchase.
Human range hearing PIANO Human voice String instruments E. TROMBONE BASS 100 MALE 125 FEMALE VIOLIN SAX TENOR A LT O 200 250 SAX FLUTE 160 TRUMPET CYMBALS GUITAR CELLO 80 CONGAS 63 315 400 500 630 800 1K 1K25 1K6 2K 2K5 3K15 4K C D E F G A B C D E F G A B C D E F G A B C D E F G A B C D E F G A B C D E F G A B C D E F G A B C D E F G A B C 16.35 18.35 20.60 Brass instruments 50 21.83 24.50 27.50 30.87 32.70 36.71 41.20 43.65 49.00 55.00 61.74 65.41 73.42 82.41 87.31 98.
