AudioControl Richter Scale Series III Owner's Enjoyment Manual
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AudioControl Richter Scale Series III Owner's Enjoyment Manual

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Series Three
Owners Enjoyment Manual
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for those who consider perfection possible
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Summary of Contents for AudioControl Richter Scale Series III

  • Page 1 Series Three Owners Enjoyment Manual ® for those who consider perfection possible...
  • Page 2 ® Dealer ____________________________________ Date Purchased ______________________________ Serial Number ______________________________ Owner’s Enjoyment Manual...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS Congratulations ..........1 Making Everything Equal .
  • Page 4 ® Owner’s Enjoyment Manual...

  • Page 5: Congratulations

    Your new equalizer is made by the only consumer elec- tronics company in the world that specializes in equalizers, signal processors and audio analyzers. AudioControl’s passion for high quality, meticulous attention to detail and professional sound heritage shows itself in the dozens of awards we have won for our designs, products and service.

  • Page 6: Features

    1 dB. The warble-tone generator makes certain the subwoofer only creates the low bass and sound level meter combine to create a very powerful frequencies for which it was intended. AudioControl makes audio analysis tool. this crossover even more useful by providing plug-in pro- Sharp Subsonic Filter for Speaker Protection gramming modules to set the crossover frequency.
  • Page 7 The Richter Scale Series Three was designed and built in when it comes to things like the Richter Scale ever being in the USA by AudioControl - An award winning manufacturer your system. of highest-quality audio components since 1977. These products are backed up by a comprehensive FIVE year This concludes the nagging section of this manual.

  • Page 8: Front Panel

    ® Front panel highlights 1. Relative SPL Meter - A precision sound level meter tone generator provides a precise reference to measure your to use along with the warble test tone to accurately measure room against. your speaker and room acoustics. The meter is damped in 3.
  • Page 9 4. Equalizer Switch - This allows simple before and and acoustic feedback. It even reduces the thump you hear if after comparisons of the system equalization. When pressed you lower the cartridge too quickly onto a record. in, this button activates the half-octave equalizer circuitry. 8.

  • Page 10: Rear Panel

    ® Rear panel highlights 1. Power Cord - Plug this into the switched outlet of first publicized by Siegfried Linkwitz and Russell Riley, two your receiver or preamp. Hewlett-Packard engineers, in a 1976 Journal of the Audio Engineering Society article. This crossover alignment offers 2.
  • Page 11 mono amp of higher power. Refer to the appendix on Bridging for more details. 5. External Processor Loop - These jacks replace the tape monitor connections on your preamplifier. They are a great place to connect other signal processors or a tape deck. 6.

  • Page 12: Placement

    ® SETTING UP THE RICHTER SCALE/ Connection Tips EQUALIZER CROSSOVER If you’re a hi-fi veteran, this part may seem repetitive, but Placement some things can never be repeated too many times (just ask The Richter Scale can be placed almost anywhere in your our Customer Support Department)! audio stack.

  • Page 13: Getting It All Hooked Up

    System examples Preamp Surround Connect Main Output to the Crossover Input Basic Hookup of Equalizer Surround Sound Separates System Using the Crossover Owner’s Enjoyment Manual...

  • Page 14: A/V Receiver System

    ® A/V Receiver A/V Receiver System with mono subwoofer output Owner’s Enjoyment Manual...

  • Page 15: Electronic Crossover

    Using The Electronic Crossover Your search for better sound has led you down the path towards electronic enlightenment. You are bi-amplifying your stereo system. By allowing the amplifiers to concentrate on narrower portion of the audio spectrum, you gain the benefits of lower distortion, better intermodulation perfor- mance and more efficient system power handling.
  • Page 16 ® An important note to remember about the Richter Scale The crossover frequency of the Richter Scale Series Three is Series Three: The Electronic Crossover is COMPLETELY programmed with a simple, plug-in resistor module. The INDEPENDENT of the Equalizer and Warble Tone Ana- module installed from our factory is 90 Hz.

  • Page 17: Making Everything Equal

    MAKING IT EQUAL - placement can make is astonishing. Especially with the GETTING YOUR SYSTEM IN ORDER subwoofer. There are three main areas of adjustment when optimizing The Acoustic Environment a sound system. They are: Every room affects speakers differently. Reflective and 1.

  • Page 18: Analyzing Your System

    ® Important Note: Not all subwoofers are created equal. Analysis Be realistic about your expectation of them. The laws of Adjusting the speaker response in the last three octaves is physics apply here: An 8" subwoofer cannot physically move nearly impossible to do with just your naked ears. That’s the volume of air of a 12"...
  • Page 19 To use the Richter Scale analyzer, you will need to connect the Main Receiver / Preamp jacks on the rear of the Richter Scale to your stereo system. The Warble Tone generator has no internal connections to the crossover, so you will not hear the test tone using only the crossover.
  • Page 20 ® Start with the microphone for the analyzer in your main Now that you have the Richter Scale connected and the listening position. It’s a good idea to also take some measure- microphone in place, it’s time to do the deed: ments at other locations near the main seat.

  • Page 21: Why Equalize

    APPENDIX A - Why Equalize? 10. Adjust the 125 Hz equalizer slider on the Richter Scale until the Relative Sound Level Meter is reading 0 dB. If you 1. Your receiver is insulting your intelligence. Manufacturers are boosting any of the equalizer sliders, listen for any think that more than two knobs (Bass &...

  • Page 22: Room Acoustics

    5. There’s a company that specializes in ‘Making good the air, water, steel or anything but a vacuum. Remember, in stereo sound better’. AudioControl has been designing and space, no one can hear you scream. building the highest quality equalizers and sound processors since 1977.
  • Page 23 Whether a surface is absorptive or reflective will vary modes. The question we need to answer is - How bad and greatly with frequency also. A suspended ceiling or a win- where will the problems produced by these reflections be? dow will have great affects on higher frequency, but they are Let’s Do A Little Math almost completely transparent to the lower bass frequencies.

  • Page 24: Building Crossover Modules

    New modules are available either from your authorized AudioControl dealer or directly from our factory. If you are feeling adventurous and are handy with a solder- ing iron, you can easily make your own resistor modules.

  • Page 25: Bridging Your Amplifier

    APPENDIX D - Bridging your amplifier In the bridged mode, each channel of the amplifier sees half of the load impedance (i.e. 2 ohms versus 4 ohms). The One more feature built into the Richter Scale Series Three is amp outputs one channel in-phase with the system and the a set of outputs on the crossover that allow you to combine other channel 180 degrees out of phase.
  • Page 26 ® For a bridged amplifier (rated at 25 watts per channel) driving a nominal 4 ohms load, the voltage is doubled and CAUTION - Limitations in the amplifier the output power is quadrupled: power supply and heatsink dissipation (28 volts x 0.707)2÷4 Ohms) = 97.97 Watts will always reduce the available power.

  • Page 27: Limited Warranty

    “good with electron- into with any major purchase. ics”, try to repair your AudioControl product. So go ahead, read this warranty, then take a few days to enjoy your new 3. The Richter Scale must have originally been purchased Richter Scale before sending in the warranty card and from an authorized AudioControl dealer.

  • Page 28: What To Do If You Need Service

    2) A brief explanation of the trouble you are having with Legalese Section the Richter Scale. (You’d be surprised how many people This is the only warranty given by AudioControl. This forget this.) warranty gives you specific legal rights that vary from state to state.

  • Page 29: Block Diagram

    Block diagram Owner’s Enjoyment Manual...
  • Page 30 ® Response Graphs Equalizer Full Boost and Cut Crossover (Factory 90 Hz Module Installed) Owner’s Enjoyment Manual...

  • Page 31: Specifications

    Crossover Frequency ..........AudioControl is a division of Electronic Engineering and .
  • Page 32 ® ® For Those Who Consider Perfection Possible 22410 70th Avenue West Mountlake Terrace, W A 98043 USA Phone 425-775-8461 • Fax 425-778-3166 Email: info@audiocontrol.com • Internet: www.audiocontrol.com Owner’s Enjoyment Manual...

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