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Summary of Contents for Avalon VT-747SP
- Page 1 U S I C E C O R D I N G Y S T E M S V T - 7 4 7 S P Pure Class A Stereo Spectral Opto-Compressor Equalizer Operation Manual © 2001 Avalon Industries Incorporated. Release 1.0.
- Page 2 U S I C E C O R D I N G Y S T E M S V T - 7 4 7 S P Operation Manual Avalon Industries, Inc., PO Box 5976, San Clemente, CA 92673 Tel: 949-492-2000 Fax: 949-492-4284 www.avalondesign.com...
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Page 3: Table Of Contents
10.1 Recall Sheet ....34 4.4 Using the Vt-747sp ...18 10.2 Block Diagram ... . .35 4.5 Six Band Passive Equalizer . -
Page 4: Introduction
A variable gain make-up amplifier. Full dynamic control from soft compression to The Vt-747sp is hand built in the USA using hard-knee limiting can be achieved with only the finest active and passive electronic master threshold, compression ratio, attack components available. -
Page 5: Features
EQ pre/post compression selection be placed pre or post compressor for enhanced effects. Twenty-two silver relays for signal routing The Vt-747sp features TSP (Tube Signal True hard-wire bypass Path) which gives you the choice of either Low noise, better than -92dB... -
Page 6: Unpacking And Inspection
Introduction 1.3 Unpacking and Inspection Keep the packing materials in case you need Your Vt-747sp was packed carefully at the to ship your unit for any reason. factory. Check to make sure that the shipping carton contains the following items:... -
Page 7: Quick Start-Up
Every setting has great potential for illuminated position, run a signal through musicality. Do not be afraid of turning the the Vt-747sp. Use the output control on the knobs or faders to their full extreme right hand side of the unit to check basic positions. -
Page 8: Quick Set-Up Guide
AVA L O N D E S I G N Quick Start-up Figure 2.1 Quick Set-up Guide Page 8 Avalon Vt-747sp Operation Manual... -
Page 9: Tips
Quick Start-up 2.2 Tips 2.3 Tutorial - Using it all Unity Level - The Vt-747sp is calibrated so The following is a tutorial that will quickly get that unity level is +4dBu. you familiar with all of the functions of the Vt-747sp. -
Page 10: Safety And Grounding
The Vt-747sp is for use with an AC supply as stereo signal. selected by the AC voltage selector (located within the AC inlet on the rear of the chassis). -
Page 11: Ac Voltage Selection
Warning! No ground adapter should ever check correct AC voltage in window. be used with this unit. 3.3 AC Voltage Selection Before connecting the Vt-747sp to the AC supply, check the OPERATING VOLTAGE located on the rear of the chassis in the AC inlet connector. -
Page 12: Fuse Replacement
Grounding 3.4 Fuse Replacement 3.5 Rack Mounting and Cooling The fuse on the Vt-747sp is located within the The Vt-747sp is designed to be mounted in a AC plug assembly on the back of the unit. A fuse standard 19" equipment rack. As vacuum... -
Page 13: Turn-On Procedure
"soft-start" turn-on procedure. the rear panel of the chassis has adequate clearance from the equipment enclosure and When the Vt-747sp is switched off or during any adjacent equipment. In electronic the "soft-start" turn-on procedure, it is in hard... -
Page 14: Operation And Controls
4.0 Operation and Controls EQ > COMP The following chapter describes the details of Switches six-band passive equalizer before your Vt-747sp and how to operate each (pre) the compressor. This gives flexibility to function. achieve different sounds. Putting the EQ... - Page 15 0dB on the VU meter. The VU meter indicates controls the overall program level of the Vt-747sp. the amount of gain reduction in dB. The Vt-747sp is calibrated so that 0 on the LED output meters accurately shows +4dBu. To calibrate the VU meter: Power unit on and...
- Page 16 Turns the power on and off. You must allow +/-4dB 500Hz peak/dip approximately 60 seconds from the time you turn on the power switch for the Vt-747sp to MID-RANGE EQUALIZER BAND complete the entire soft start turn-on proce- Controls mid frequency range: dure.
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Page 17: Rear Panel Description
4.3 Unbalanced Operation refer to the AC Voltage Selection section of this manual in Chapter 3 (page 11), or contact your The Vt-747sp can also be used in unbalanced authorized Avalon dealer. mode by grounding pin 3 on the cable input For instructions on changing the fuse, see and output pins. -
Page 18: Using The Vt-747Sp
Because of the passive design, the equalizer The following is a description of the six fre- on the Vt-747sp is smooth and musical. It can quency bands. be used to subtly shape and color while still keeping the signal musically balanced From Low to High (left to right) (program equalizer.) -
Page 19: Using The Side-Chain
Audio Workstation (DAW) or tape machine. de-essing. De-essing is the removal of excessively pronounced "S" sounds from Note that the Vt-747sp is a line level unit only. vocal recordings. You can de-ess with the It does not have microphone preamplifiers Vt-747sp and any other frequencies where (mic pre’s). -
Page 20: Recording
Inputs Mixing Console Final Media - DAT or CD 2 new inputs Stereo Submix Main Outputs or buss inputs Outputs or Main Insert or Tape Output Inputs Inputs Inputs Monitoring System Vt-747sp CD Burner Page 20 Avalon Vt-747sp Operation Manual... -
Page 21: Mastering
5.2.0 Application Settings 5.2.1 Stereo Buss for Mixdown The following are a few example settings for the Vt-747sp to be used as starting points for specific applications. You will most likely need to adjust the settings given here for your recordings because of the many variables which depend on a recorded sound. -
Page 22: Stereo Buss With De-Ess
EQ Faders from left (1) to right (6): EQ Faders from left (1) to right (6): 1. +1 1. +1 2. +1 2. 0 3. +0.5 3. 0 4. +0.5 4. +0.5 5. +1 5. +0.5 6. +1 6. +0.5 Page 22 Avalon Vt-747sp Operation Manual... -
Page 23: Stereo Keyboards
EQ Faders from left (1) to right (6): EQ Faders from left (1) to right (6): 1. 0 1. +3 2. +1 2. +2 3. +1 3. +1 4. +2 4. +1 5. +2 5. +2 6. +1 6. +2 Avalon Vt-747sp Operation Manual Page 23... -
Page 24: Acoustic Piano
EQ Faders from left (1) to right (6): EQ Faders from left (1) to right (6): 1. +1 1. 0 2. +2 2. -0.5 3. +1 3. -1 4. +2 4. 0 5. +1 5. +0.5 6. +1.5 6. +0.5 Page 24 Avalon Vt-747sp Operation Manual... -
Page 25: Drum Overheads
2. +2 compressor is set to 8:1 compression then an 3. +1 8 dB increase in the input level will result in a 4. +0.5 1dB increase in the output level. 5. +1 6. +2 Avalon Vt-747sp Operation Manual Page 25... - Page 26 1dB for every 2dB that the input is over the threshold. This way the compressor allows the signal to be louder than the threshold, but only by half as much. This is typical moderate compression. A 4:1 ratio Page 26 Avalon Vt-747sp Operation Manual...
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Page 27: Equalization Primer
Asked Questions about the Vt-747sp: allow adjustment to the frequency range of an incoming signal using a number of separate Q: Can I use the Vt-747sp as an insert for frequency bands. A graphic equalizer compression and EQ? consists of a number of pre-selected A: Yes. - Page 28 (just like the old road? LA2A’s). To calibrate the VU meter to 0dB see A: Yes. the Vt-747sp as well as all Avalon page 32. equipment is literally built like a tank. Steel chassis, metal faceplate, metal knobs, all...
- Page 29 It has no microphone preamplifier. The Vt-747sp is Q: Will the Vt-747sp help to warm up the great for stereo keyboards, synthesizers, drum signal going to a digital recorder? machines, stereo submix or mix buss A: Yes.
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Page 30: Trouble Shooting
8.0 Trouble Shooting 1. Plug your input source (keyboard, synthesizer If you experience any problems with your or line input) into Vt-747sp; make sure to check Vt-747sp, please make sure to first isolate the your cables. problem to your Vt-747sp. In many cases the problem can be a bad cable or another piece 2. - Page 31 D E S I G N Trouble Shooting Tube Related Symptoms Other problems Please call your nearest dealer or the Avalon The following list are symptoms of a failing factory at 949-492-2000 if you have any vacuum tube. If you are experiencing these...
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Page 32: Service And Contact Information
1. Turn the unit on Because of the exceptional build quality of the 2. Let unit warm up for at least 30 minutes Vt-747sp, the unit will perform for many years 3. Unplug all inputs to come. Like any musical instrument, it 4. -
Page 33: Technical Information
D E S I G N Information 10.0 Technical Information Make-up gain: Variable 0dB to +10dB stereo tracking Your Vt-747sp is built to withstand many Compression ratio: Variable 1:1 to 20:1 years of high performance music making. If experience malfunctions... -
Page 34: Recall Sheet
Technical AVA L O N D E S I G N Information 10.1 Vt-747sp Recall Sheet Page 34 Avalon Vt-747sp Operation Manual... -
Page 35: Block Diagram
Technical AVA L O N AVA L O N D E S I G N D E S I G N Information 10.2 Vt-747sp Block Diagram Avalon Vt-747sp Operation Manual Page 35... -
Page 36: Warranty
(949) 492-2000. (1) year period, all labor charges will be paid by the customer. To return a unit to Avalon for repair or 2. Avalon will supply at no charge, new or exchange, you will need to obtain a Return rebuilt replacements for any defective Authorization Number (RA) from Avalon. -
Page 37: Appendix A - Glossary
Decibels referenced to 0.775 3dB, expressed in hertz or in musical volt. octaves. dBV: Decibels referenced to 1 volt. channel – A single functional path in an audio circuit. Avalon Vt-747sp Operation Manual Page 37... - Page 38 Excessive feedback results in ground – The point of zero voltage in a circuit unpleasant, screaming sounds usually at or electrical system. particular, high frequencies. Page 38 Avalon Vt-747sp Operation Manual...
- Page 39 DAT recorder. monaural – Confined to a signal channel. One microphone is a mono pickup; many microphones mixed to one channel is a mono Avalon Vt-747sp Operation Manual Page 39...
- Page 40 - A function on a compressor where a specified frequency range is compressed more than the overall musical program. Many compressors have a jack for Page 40 Avalon Vt-747sp Operation Manual...
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