Audio Control Richter Scale Series Three Equalizer/Analyzer 24 db/octave. Great working order; backlight is good; no rack handles; 4 rubber feet intact and good. Sorry, no returns, ship only to Continental U.S. From the manufacturer: The Richter Scale is a bass management system designed to have your subwoofer breaking new ground. A 24dB/octave, Linkwitz-Riley alignment will precisely match the crossover frequency of your subwoofer. A six band equalizer controls the critical bass region of 22.5 Hz to 125 Hz in one-half octave steps. A built-in-lab-grade analyzer and warble tone generator enable precise measuremnt and calibration. The Subsonic filter prevents damage to your subwoofer by preventing inaudible tones from reaching the speaker. With the Richter Scale in your system, youll hear more cleaner and tighter bass than ever before.

Audio Control Richter Scale Series Three Equalizer/Analyzer 24 db/octave. Great working order; backlight is good; no rack handles; 4 rubber feet intact and good. Sorry, no returns, ship only to Continental U.S.

Audio Control Richter Scale Series II. Condition is Used. Shipped with USPS Priority Mail.

Unit powers on and lights up, havent tested it further than that. Thanks for viewing!

Unit powers on and lights up, havent tested it further than that. Thanks for viewing!

Works. Passes audio with no issues. Warble button works. Meter goes up and down. Backlight is good too. No rack handles and missing 3 out of 4 rubber feet and no microphone included. Chip is included and will add pictures later.

AudioControl Richter Scale Series III Is the most sought after model of its kind.Does NOT Include original microphone. But this does include the 90hz chip installed. This unit was fully tested and works.I really should keep this for my own rig. But I know someone needs it more than I do.Rare Vintage Audio.See photos for condition and link for additional mfg specs. Manual PDF: https://www.audiocontrol.com/downloads/home/discontinued/Richter%20Scale%20Series%20III/Richter%20Scale%20Series%20III%20Owners%20Manual.pdf

AudioControl Richter Scale Series III Is the most sought after model of its kind. Includes original microphone, manual and box. The included microphone makes this unit highly desirable. Replacement microphones are no longer available from AudioControl. Use the microphone to calibrate the subwoofer to the room using the warble tone generator. No additional modules are included but they can be purchased or easily made per the included manual. This unit powers up and is in like new condition and was never put through heavey use. Rare Vintage Audio.See photos for condition and additional mfg specs. Thanks for shopping EbayWill ship to lower 48 only.

I do not know how this works or if it works so I am listing as parts only. It might work great or it might but a hunk of junk I just dont know. Here is what I do know. Cosmetically it looks fantastic it doesnt have a mark on it.

Audio Control The Richter Scale Series I Features: Active Bass Response Analysis 5 Band Half Octave Bass Equalizer Subsonic Filter Rumble Reducer Ultra Low Boost 2-Way Electronic Crossover

I purchased this AudioControl Richter Scale Series Three 1/2 octave subwoofer equalizer new and used it for many years. We are moving now, and I’ve got to reduce the number of things we have to move. I have the manual, and 2 extra crossover chips. The 80hz module is inside, and the 70hz and 90hz modules are in a plastic bag in case you need to change the crossover frequency. I could not find the microphone though. It’s in excellent condition, and looks new. I don’t have a system to test this anymore, but it does power up fine, and the light in the meter works, and it was working fine last time it was used. It did help flatten out the bass response in my old high end stereo system. Hopefully this finds a good home.

AudioControl Richter Scale....Used item, but in excellent physical and working condition. Shipping within mainland US only..... Vintqge item as is. No other accessories included.

This is a reprint of an Audio Review from 1981! This review will have SPECS, COMMENTARY, DETAILS, and INFORMATION about the unit listed. . You wont be dissapointed! A piece of Audio History! I have THOUSANDS more Ads and Reviews on my Ebay Store. Email with ANY questions, THANKS! -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Each Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo ListerThe free listing tool. List your items fast and easy and manage your active items.

I have for sale a very nice example of an Audio Control Richter Scale EQ / Electronic Crossover. The unit works and looks great, no issues inside or out. Meter works fine, looks nice. all controls are quite and work fine. Any questions feel free to ask and buyer to pay 25.00 shipping within the US

This is a reprint of an Audio Review from 1981! This review will have SPECS, COMMENTARY, DETAILS, and INFORMATION about the unit listed. . You wont be dissapointed! A piece of Audio History! I have THOUSANDS more Ads and Reviews on my Ebay Store. Email with ANY questions, THANKS! -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Each Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo ListerThe free listing tool. List your items fast and easy and manage your active items.

This is a reprint of an Audio Review from 1981! This review will have SPECS, COMMENTARY, DETAILS, and INFORMATION about the unit listed. . You wont be dissapointed! A piece of Audio History! I have THOUSANDS more Ads and Reviews on my Ebay Store. Email with ANY questions, THANKS! -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Each Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo ListerThe free listing tool. List your items fast and easy and manage your active items.

Definitely not the prettiest example but it works. I dont have the mic. I had several of these that came from an estate. I couldnt find any of the mics.

This is a reprint of an Audio Review from 1981! This review will have SPECS, COMMENTARY, DETAILS, and INFORMATION about the unit listed. . You wont be dissapointed! A piece of Audio History! I have THOUSANDS more Ads and Reviews on my Ebay Store. Email with ANY questions, THANKS! -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Each Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo ListerThe free listing tool. List your items fast and easy and manage your active items.

This AudioControl Half Octave Equalizer/Analyzer is a top-of-the-line device for any audio enthusiast. The Richter Scale Series Three model is specifically designed to provide precise sound control and analysis. It is perfect for fine-tuning any home audio system to achieve the perfect sound. With its half-octave frequency bands, this equalizer allows for a fine level of control over the sound output. The AudioControl brand is well-known for producing high-quality audio equipment, and this model is no exception. Whether you are looking to enhance your music experience or improve your home theater setup, the AudioControl Half Octave Equalizer/Analyzer is an excellent choice.

AudioControl Half Octave Equalizer/Analyzer Richter Scale Series Three Works great, in very good condition. Comes as pictured

Used AudioControl Richter Scale Series Three. Includes original microphone, manual and box. The included microphone makes this unit more desirable. Replacement microphones are no longer available from AudioControl. The microphone is used to tune the subwoofer to the room using the warble tone generator. The unit come with the original crossover 90Hz PFM module installed in the unit. No additional modules are included but they can be purchased or easily made per the manual. The unit has some scratches along the top edge, corners and bottom as seen in photos. Manual avaiialble at AudioControls website.

This is a reprint of an Audio Review from 1981! This review will have SPECS, COMMENTARY, DETAILS, and INFORMATION about the unit listed. . You wont be dissapointed! A piece of Audio History! I have THOUSANDS more Ads and Reviews on my Ebay Store. Email with ANY questions, THANKS! -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Each Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo ListerThe free listing tool. List your items fast and easy and manage your active items.

Tested and in working condition! Responds when plugged in. Fast shipping and willing to take offers!