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Table of Contents
Related Manuals for PRESONUS VXP
Summary of Contents for PRESONUS VXP
- Page 1 User’s Manual...
- Page 2 E X P A N D E R S E M I – P A R A M E T R I C E Q U A L I Z E R USER’S MANUAL Version 1.0 1999, PreSonus Audio Electronics, Incorporated. All rights reserved.
- Page 3 Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. In no event will PreSonus be liable for incidental, consequential or other damages resulting from the breach of any express or implied...
- Page 4 1999, PreSonus Audio Electronics, Incorporated. All rights reserved.
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Page 5: Table Of Contents
T A B L E O F C O N T E N T S Overview Introduction Features Controls & Connections Front Panel Basic Layout Mic Preamp Section Smart Compressor Expander De – Esser Equalizer Master Section Back Panel Wire Diagrams Power Supply Operation Dynamic Microphones... -
Page 6: Overview
Limiter and an optional 96k/24 Bit digital output card. PreSonus Audio Electronics has designed the VXP utilizing high-grade components to insure optimum performance for an infinite period of time. We believe the VXP to be an exceptional sounding unit and an exceptional value. We encourage you to contact us at 1-800-750-0323 with any questions or comments you may have regarding your PreSonus equipment. -
Page 7: Features
O V E R V I E W 1 . 2 F E A T U R E S The following information is a summary of your VXP’s features: v Microphone Pre-Amplifier. Your VXP contains a Class A discrete input buffer followed by a dual servo gain stage. This... - Page 8 O V E R V I E W Ø IDSS Control. The VXP offers a very high quality transformer and features an IDSS control (this control adjusts the drain current on the input FET amplifier altering the even harmonic levels of the signal being passed) with an adjustment range of 0% to 100%.
- Page 9 O V E R V I E W control with the outer ring for threshold set and the inner knob for ratio adjustments. This feature gives you the benefit of seamless noise reduction through downward expansion ridding the signal of unwanted background noise.
- Page 10 O V E R V I E W Ø 80Hz. An 80Hz filter is provided for eliminating low frequency noise. This lets you greatly reduce background noise such as air conditioners or wind noise with the flick of a switch without effecting the desired frequencies.
- Page 11 O V E R V I E W Ø Level. The output of the VXP is adjusted by the Level control and is useful for compensating for gain loss due to compression or to decrease output signal that boosting frequencies with the Equalizer section may have caused.
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Page 12: Controls & Connections
P A N E L B A S I C L A Y O U T otice that the front panel of the VXP is divided into six sections - section one is the Mic Preamp. The Mic Preamp section contains:... - Page 13 CONTROLS & CONNECTIONS Compressor Section contains: Pre-Set Selector Level Control Process In/Out Switch Gain Reduction Meter...
- Page 14 CONTROLS & CONNECTIONS Expander Section: Threshold Control (Outer Ring) Ratio Control(Inner Knob) LED Expansion Meter De-Esser Section: Threshold (Outer Ring)
- Page 15 CONTROLS & CONNECTIONS Frequency (Inner Knob) Gain Reduction Meter...
- Page 16 CONTROLS & CONNECTIONS EQ section: 4 Band Semi-Parametric Low Shelving Control Low Mid Q Select Switch Low Mid Level (Outer Ring) Low Mid Frequency Select (Inner Knob) 80 Hz Filter Switch EQ In/Out Switch High Mid-Range Level Control(Outer Ring) High Mid-Range Frequency Control (Inner Knob) High Mid Q Switch High Shelving Control...
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Page 17: Mic Preamp Section
GAIN: This control provides 60dB of gain. IDSS CONTROL: Selects the amount of increase (0% to 100%) applied to the even harmonic series of the signal being amplified by the VXP. The effect of manipulating the harmonic distortion is of increasing or decreasing the apparent “warmth”... - Page 18 This is a very useful feature for rapidly reducing the level coming into the VXP and thus preventing the input signal from over- driving (distorting) the input. This may occur due to high output level from a microphone or other device.
- Page 19 The engineers at PreSonus have done a remarkable job in designing a function that is this effective at constraining the signal level, while at the same time, manages to let the signal remain audibly transparent and sounding relatively unaffected.
- Page 20 A de-esser is a special type of compressor designed to operate only at predetermined frequencies to reduce the effect of vocal sibilant sounds such as S’s at the beginning and ending of words, for example. The VXP De- Esser has a variable threshold range from –40 dB to +20 dB. The frequency of operation is determined by selecting the most effective frequency with the Frequency Range controller.
- Page 21 CONTROLS & CONNECTIONS...
- Page 22 2 . 6 E Q U A L I Z E R The Equalizer section of the VXP contains a 4 Band Semi-Parametric Equalizer. There is also available Low Mid Narrow Q Select and High Mid Narrow Q Select, as well as, an 80Hz filter. An In/Out switch is provided for auditioning the effects that the equalizer settings are having on the signal being processed.
- Page 23 80 HZ The VXP has an eighty-hertz filter that is activated by engaging the switch on the front panel. This filter (often referred to as a RUMBLE filter) is useful for eliminating extraneous low-end information from the signal being amplified.
- Page 24 LEVEL: This control adjusts the output level of the VXP. It functions as a master fader for the entire processing strip. It is useful for adjusting the overall output level up or down to match the optimum input level of a recorder, mixer, etc.
- Page 25 CONTROLS & CONNECTIONS The Return / Line In connector of the VXP is provided for use in conjunction with audio process devices such as reverbs/delays and as a Line In for recording media such as tape machines, hard disc recorders, or DAT’s.
- Page 26 U N I T S , E T C . The VXP features a send jack and a return jack. This feature allows the use of external processors such as reverbs and digital devices. Simply connect the send jack, balanced or unbalanced to the input of the external processor.
- Page 27 24 BIT to 16 BIT sampling is necessary. The ¼” TRS Line input will provide the benefit of allowing two VXP‘s to share one Digital Output Card and in so doing, share both sides of the A/D converter.
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Page 28: Smart Compressor
4 TECHNICAL Channels ....................ONE Dynamic Range................>115dB Noise Floor............@ +12dB Gain -97.2dBu Headroom ..................+24dBu Frequency Response.............10Hz to 50kHz Internal Operating Level............0dBu = 0dB Microphone Pre Amp Gain................. + 12dB to +38dB THD + Noise(0%IDSS)..............<0.003% THD + Noise (Full IDSS).............. >0.500% Input Connector.................. -
Page 29: Expander
TECHNICAL Expander Threshold Range..............-70dBu to +20dBu Ratio Range ................1:1 to 20:1 Metering (4-LED)..............Gain Reduction De- Esser Threshold Range..............-40dBu to +20dBu Frequency Range..............800Hz to 8kHz Metering(4-LED)..............Gain Reduction Equalizer Rumble Filter Cutoff Frequency............80Hz Low Shelving (+/-12dB) ..............100Hz Low Mid-Range (+/-12dB)............90Hz to 700Hz Switchable Q..................0.5/2.0 High Mid-Range(+/-12dB)..........450Hz to 5.8kHz Switchable Q...................0.5 /2.0... - Page 30 Power Requirements....100VAC to 120VAC200VAC to 240 VAC Size..............1U Rack (19” x 1.75” x 7”) Weight ..................8 pounds As a commitment to constant improvement, PreSonus Audio Electronics, Inc. reserves the right to change any specification stated herein at any time in the future without notification.