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207
Solution Delivery Series
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wo
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ic
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nstrument
p
reamplier
Instruction Manual
P/N 999-4160
Revision 1
Released 01/01/2002
Manufactured by
Aphex Systems Ltd.
11068 Randall St.
Sun Valley, CA 91352
USA
S Y S T E M S
Copyright 2002 Aphex Systems Ltd. All rights reserved.
Produced by: Donn Werrbach. Creation tool: Adobe InDesign 1.5. Printed by: Stuart F. Cooper Co., Los Angeles.
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Summary of Contents for Aphex Solution Deliver 207
- Page 1 Aphex Systems Ltd. 11068 Randall St. Sun Valley, CA 91352 S Y S T E M S Copyright 2002 Aphex Systems Ltd. All rights reserved. Produced by: Donn Werrbach. Creation tool: Adobe InDesign 1.5. Printed by: Stuart F. Cooper Co., Los Angeles.
- Page 2 As with all our products, we are extremely proud of the ingenuity of design and the manufacturing quality of the Model 207. We love to hear from you, our customers, about your experiences with any of our products. Our customer support is unmatched in the industry, so please do not hesitate to contact us.
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Page 3: Table Of Contents
4.3.4 Using Low Cut ....................4.3.5 Using MicLim™ ....................4.4 Replacing Your Console’s Mic Preamps ................. 4.5 Bypassing the Console Altogether ..................4.6 Using the 207 for Stereo Recordings ................... 4.6.1 Spaced Pair Technique ..................4.6.2 X-Y Technique ....................4.6.3 M-S Technique .................... -
Page 4: Quick Setup
You can use any type of balanced, low impedance processors can be readily set to operate at this level. microphone from dynamics to ribbons to condens- ers. The 207 supplies a very clean and stable 48V HEADROOM METER phantom voltage source suitable for even the most As the level approaches 0dB, you run out of head- expensive microphones. - Page 5 207’s gain to reduce its output low enough to stop overloading the mic input of your mixer, then your large console gain amplifies the basic noise floor of the 207. That will result in a very poor signal to noise ratio. Always use the most gain possible in the 207 and adjust your mixer’s fader or line input gain to accept it, and never feed a mic input from a 207.
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Page 6: Introduction
A study of learned and developed since its inception. Hence, the currently available products shows that a large per- 207 was born. Production of the Model 107 was dis- centage use similar circuits based on one or two pop- continued. -
Page 7: What Else Is So Special
Because of the unique capabilities the sound. Once we had the Model 207 very well of the RPA circuit, we were able to mix the mic and defined, we went to work at embodying the circuits... -
Page 8: Block Diagram
Manual Introduction Page 8 Aphex Systems Ltd. Model 207... -
Page 9: Installation And Interfacing
3.3 AC LINE CONNECTION Use only a power cord that carries approvals for use in your location. The 207’s internal power supply is designed to operate from all nominal power sources from 100 to 240 volts a.c. at 50/60Hz without requiring the user to change any settings. -
Page 10: Output Connectors
ATING LEVEL switch to get you close enough. OUTPUT JACK SCHEMATIC with OPERATING LEVEL SWITCH OUTPUT PAD +4dBu -10dBV Sleeve 604Ω 1/4” PHONE JACK 56Ω Ring 604Ω XLR JACK 715Ω 2 (+ 267Ω 3 (-) 56Ω Page 10 Aphex Systems Ltd. Model 207... -
Page 11: Using The 207
Model 207 to meet the widest requirements, we gave it a 1 megohm input The Model 207 is a two channel unit. It contains two impedance. Therefore, we cannot recommend it for separate, independent, preamplifier channels. Each any type of passive piezoelectric pickup. -
Page 12: Using The Microphone Input
Another time when phase reversing can be helpful is always see something less than 48 volts. This is not a in mixing multiple microphones that are within each Page 12 Aphex Systems Ltd. Model 207... -
Page 13: Using The Pad
MicLim™ works best on microphones having an impedance of 50 ohms or higher. That includes just In the 207, we provided a pad of 20dB. That means about every powered and passive microphone in exis- when the pad is on, the net gain of the preamp is tence. -
Page 14: Replacing Your Console's Mic Preamps
There is a solution if your console has pre-fader speed of this limiter too aggressive for general pur- inserts. You can plug the output of your 207 into the pose effect limiting. Your favorite studio compressor/ console’s insert jack, bypassing the channel’s whole limiters can still be put to good use. -
Page 15: Using The 207 For Stereo Recordings
3 times the 207 you can go direct to tape or disk and elimi- as far apart as their distance to the front of the sound nate an entire layer of electronics. -
Page 16: Further Reading
Figure 4-4 SPACED PAIR 3 to 1 TECHNIQUE For those recordists that do much of their work in binaural, the Model 207 is perfect. Its low noise and clear open sonic quality generate recordings that are incredibly realistic and beautiful, catching all the nuances and details. -
Page 17: Warranty And Service
Any and all warranties are limited to the duration of the warranty stated above. EXCLUSION OF CERTAIN DAMAGES Aphex Systems’ liability for any defective unit is limited to the repair or replacement of said unit, at our option, and shall not include damages of any other kind, whether incidental, consequential, or otherwise. -
Page 18: Specifications
Dimensions: 19” W x 1.75” H x 8.25” overall depth (482.6mm W x 445mm H x 209.6mm overall depth); depth behind front panel: 7.5” (190.5mm) Net Weight: Rack-mounted: 6lbs. (2.73kg) Shipping Weight: 9lbs. (4.1kg) All specifications are subject to change without notice. Page 18 Aphex Systems Ltd. Model 207... -
Page 19: Architectural Specifications
The device shall have a net weight of approximately 6lbs. (2.73kg) and is capable of mounting in a standard electronic equipment rack. Power The unit shall have a self contained power supply operating from the ac line. Primary voltage, connectorization and agency listings shall be appropriate to meet local requirements. Aphex Systems Ltd. Model 207 Page 19... -
Page 20: Appendix A - Introduction To Balanced And Unbalanced Wiring
Since audio is an alter- plications in interfacing. nating voltage, swinging through negative and posi- tive polarity, the current through the two conductors Balanced transmission works something like this. changes direction each alternate half cycle. Which Page 20 Aphex Systems Ltd. Model 207... -
Page 21: Appendices
You are going to find virtu- audio quality. That’s why the Model 207 is equipped ally all balanced cables include a shield so you need with a fully balanced I/O. - Page 22 Seriously consider putting one of these on each voltage between the hot slots of the different outlets unbalanced piece of gear you use. you’ve chosen. It should be very low or zero. That will remedy 50 percent of the cases. Page 22 Aphex Systems Ltd. Model 207...
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Page 23: Appendix C: Proper Wiring Techniques
Regardless of inaccuracies, it has become more or less The three main contacts on an XLR (or TRS) and standard over the years to refer to balanced lines as the accepted wiring assignments shown above are Aphex Systems Ltd. Model 207 Page 23... -
Page 24: Appendix D: Standard Cable Wiring
The following instructions show all the different ways to consider impedance when dealing with interfac- you will probably ever need to hook up your 207 as ing pro line level equipment (impedance “matching” well as any other equipment you may own. You will is mostly a requirement of the past). - Page 25 XLR to 1/4” TRS Phone Balanced Cables From an Output To an Input Female XLR Male XLR To an Input From an Output No Connect Stops Ground Loops Stereo Phone Plug Stereo Phone Plug No Connect Stops Ground Loops Aphex Systems Ltd. Model 207 Page 25...
- Page 26 Manual Appendices PART 2: BALANCED OUT to UNBALANCED IN Voltage Balanced Outputs (Used on the 207) It was mentioned that there are several types of bal- anced output stages in use today. The following dia- grams show you how to properly unbalance each SIMPLIFIED SCHEMATIC type of output.
- Page 27 From Equipment Output Don’t Connect Pin 3 Mono (TS) Phone Plug To Equipment Input To 207 Ground Shield This End Only Insert Jack From Equipment Output Mono (TS) Phone Plug Ground Shield This End Only Aphex Systems Ltd. Model 207 Page 27...
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Page 28: Patent Notice
This product is protected under one or more of the following Aphex patents. 4,578,648 4,633,501 4,843,626 4,939,471 5,115,471 5,155,769 5,334,947 5,359,665 5,422,602 5,424,488 5,450,034 5,463,695 5,483,600 5,485,077 5,612,612 5,737,432 5,848,167 5,896,458 5,898,395 5,930,374 Aphex Systems Ltd. Model 207 Page 28...
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