Table of Contents
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Table of Contents
Related Manuals for DigiTech VTP1
Summary of Contents for DigiTech VTP1
- Page 2 EN 60065 EMC: EN 55022 (1987): IEC 65 (1993) CISPR 22 (1993) Class B European Contact: Your local DigiTech Sales and Service Office or Amendment 1 (1987) EN 50082-1 (1992) International Sales Office Amendment 2 (1989) 3 Overlook Drive Unit #4...
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Page 3: Table Of Contents
Digitech VTP-1 Owner’s Manual Table of Contents Introduction .................1 Warranty ..................2 Connection Examples ............3 Rear Panel .................4 Wiring Scheme ................4 Mic Input ...................4 Line Inputs.................4 Insert Loop ................5 Send ...................5 Return ..................5 Digital Outputs ................5 Front Panel .................6 Post Trim ...................6 Pre Gain ..................6... -
Page 4: Introduction
Introduction Thank you for purchasing the Digitech VTP-1 vacuum tube preamplifier. This product was devel- oped to help you improve the sound of your digital recording, analog recording, and live perfor- mance. The VTP-1 offers a better alternative to using the average quality microphone preamps found in the typical multi-input console. -
Page 5: Warranty
In no event shall DigiTech or its dealers be liable for special or consequential damages, or from any delay in the performance of this warranty due to causes beyond their con- trol. -
Page 6: Connection Examples
Connection Examples The following diagrams show a few of the ways in which the VTP-1 can be used. Please note that not all digital recorders have direct digital interfacing via AES/EBU and S/PDIF. These may require a translator box. As a microphone preamplifier direct to DAT To add “Tube Warmth”... -
Page 7: Rear Panel
REAR PANEL WIRING SCHEME All of the input and output connectors are “pin 2 hot” meaning that pin number 2 on the XLR connecting cables carries the positive side of the balanced signal. Pin number 3 is “cold”, carrying the negative polarity and pin 1 is the shield. The 1/4”... -
Page 8: Insert Loop
INSERT LOOP These connectors allow you to insert another processor such as a compressor or de-esser into the signal path. You would insert the processor into this loop to place it in the path leading to the digi- tal output of the VTP-1. Both the SEND and RETURN are balanced TRS jacks with +4 dBu nom- inal sensitivity. -
Page 9: Front Panel
Front Panel POST TRIM Control This control determines the output level presented at the analog and digital outputs. This and the PRE GAIN control work together to allow you to dial in the amount of tube saturation you would like while maintaining a nominal output level. NOTE: The POST TRIM control should generally be set to the fully clockwise position unless you want tube saturation. -
Page 10: The Vu Meter And Clip Led
The VU Meter and CLIP LED These two components give you a combined and highly accurate reading of the amount of level at the analog and digital outputs. The VU meter is calibrated in Volume Units which give an average signal level reading. -
Page 11: Eq In/Out Switch
HI MID EQ plot LO MID EQ plot Boosting frequencies adds gain and you may find that this lights the CLIP LED. If this occurs, reduce the level with the PRE GAIN control or POST TRIM. EQ In/Out switch This switch removes the entire EQ circuit from the signal path. This is useful if you want to con- firm that your EQ modifications are an improvement on the non-EQ’d signal. -
Page 12: Phase Reverse Switch
PHASE reversal switch You can invert the phase of the incoming signal. This may be required when you have two mics coming into both channels of the VTP-1 and the distance between the mics is at a critical point where they cause frequency cancellation. Flipping the phase of one of the input channels can overcome the notchy, comb filtering effects caused by multiple mics on a single source. -
Page 13: Signal Flow Diagram
DIGITECH VTP-1 SIGNAL FLOW DIAGRAM ••• •••... -
Page 14: Specifications
VTP-1 SPECIFICATIONS Equivalent Input Noise: -127 dBu @ 150 Signal-to-Noise Ratio: > 102 dB, A weighted Total Harmonic Distortion + Noise: < 0.1% typical, user-variable Frequency Response: +0, -1 dB from 20 Hz to 20 kHz +0, -3 dB from 15 Hz to 40 kHz Equalization: +/- 15 dB @ 80 Hz (shelving) +/- 15 dB @ 50 Hz to 3.2 kHz... - Page 15 Telephone (801) 566-8800 FAX (801) 566-7005 International Distribution: 3 Overlook Dr Unit 4 Amherst, New Hampshire 03031 U.S.A. FAX (603) 672-4246 DigiTech™ and VTP-1 are registered trademarks of DOD Electronics Corporation Copyright © 1995 IVL Technologies Ltd. Printed In U.S.A. 6/96 Manufactured in the U.S.A.