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Design Goals

Corus+ was designed to meet the demands of guitaristists, keyboard players and other instrumentalists who wanted AI sound, but with a somewhat more ”forward” character. To achieve this, a different crossover and woofer were used (compared to a Coda+) to trade off bass extension below 60 Hz for greater volume and mid-range projection. As a result, Corus+ allows players who are prepared to trade off some bass extension to enjoy the many benefits of a downfiring woofer (more natural sound, a broader soundstage, etc.) while being heard more forcefully out front.

While most guitarists, keyboardists, violinists, etc. select Corus+, some continue to prefer Coda+ for its more laid back presentation and deeper bass presence. In addition, some cellists and bassists choose Corus+ over Coda+ because the sound happens to better suit their ear. With all Acoustic Image amplifiers delivering a broad frequency range of high fidelity sound, product selection is a matter of personal preference (see the How To Select tab on the home page).

At 800W into 4 ohms, Corus will play surprisingly loud without distortion and is more than adequate for the vast majority of rooms. In addition, it offers a direct out to tie into the PA for large venues. But when truly big volume is needed from the amp, addition of a Corus EX extension speaker increases both power and coverage dramatically. Plus, the head is removable so that it can be used with a larger speaker system to get even more volume when required.

A Corus EX also takes the Corus+ sound for guitar and violin from transparent to truly holographic. In addition, guitarist/vocalists who also use the Corus+ as a PA may want an extension cab for greater coverage in mid-size venues.