Ipswich, England (July 20, 2017)—Celestion has announced a new addition to its family of digital downloadable impulse responses, called the A-Type, representing an unusual kind of guitar speaker: “one that offers the celebrated classic British Celestion tone with a bit of an American accent thrown in,” according to the company. The new A-Type Impulse Responses, along with the nine other sets of classic loudspeaker IRs introduced earlier this year, are available for audition and download.
Celestion’s Impulse Responses—or IRs—are intended to capture and represent the behavior of a speaker cabinet in the specific space in which it was recorded, including the frequency and phase response of single drivers as well as the interaction of multiple speakers. The result, according to the company, is that Celestion IRs are reportedly able to reproduce the desired tone consistently regardless of the environment in which they're used. The IR downloads are available in .WAV format at 44.1 kHz, 48 kHz, 88.2 kHz and 96 kHz sample rates at 24 bit depth, in lengths of 200 and 500 milliseconds.
Celestion’s IR formats will work in all known hardware capable of loading IRs, and for the most popular hardware, Celestion have already grouped together the correct formats. Guitar processor manufacturers supported include Atomic Amps, Fractal Audio Systems, Kemper, Line 6, Logidy, Positive Grid, Two Notes, Headrush and Yamaha. The Celestion IR files may be downloaded in the sample rate and length appropriate for the hardware being used or as a complete package of all rates and lengths. Certain third-party hardware requires the files to be converted into a proprietary format before use.
Five individual IR varieties of the new Celestion A-Type speaker are available for download, which correspond to each of five separate types of cabinet, including 1x12 (open back); 1x12 (closed back); 2x12 (open back); 2x12 (closed back); 4x12 (closed back). For each of these cabinets, three different professional studio-quality microphones were used, each placed in six discrete locations, resulting in 18 impulse responses per cabinet. In addition, Celestion has incorporated eight more impulse responses for each cabinet, created by mixing together various single IRs, offering further variety.