API 550A EQ

Oct 18, 2004 8:00 AM, By Mix Editors

Polls


Education Guide

Mix is gearing up to present its longstanding annual Audio Education Guide in its November 2014 issue. Want to have your school listed in the directory, or do you need to update your current directory listing? Add an image, program description, or a logo to your listing! Get your school in the Mix Education Guide 2014.

API will re-issue the API 550A discrete 3-band equalizer at the 117th AES Show in San Francisco, booth #402.

API's Saul Walker designed the original 550A in the late 1960s. Originally a modular OEM equalizer, the 550A found its way into many custom console designs by Frank DeMedio and other leading engineers, many of which are still in use today. The 550A became API's standard channel module EQ when the company started manufacturing consoles in 1971.

Of the re-issue, Jeffrey Bork, head API engineer, comments, "We've gone to great lengths to ensure that the new 550As are exactly—and I mean exactly—the same as the original. For starters, API constructed exact duplicates of the metal work and circuit boards from the original artwork. We made silk screens from the same original artwork for the new front panels. The 550A uses the same output transformer that API has used throughout the years. And to keep everything exactly the same, we went to the original manufacturer for the exact same rotary switches and the same Schadow switches for the bypass. What you end up with is an exact replica even down to the gauge of the wiring and the harnessing—even the original documentation is included. Everything is so exact that people with older 550A EQs will now be able to buy matching units or purchase parts to refurbish and fix their older units. It's basically the next production run of API units from the early 1980s.”

The 550A uses bridge-T filters (RC networks), two of API's 2520 discrete amplifier modules, a 1:3 output transformer and provides up to +28dBm output level. All three of the frequency bands overlap, and there is up to +/-12 dB of boost or cut in 2dB steps available for each band. There are choices of shelving and peaking for the high and low band and a switchable, 12dB/octave, 50-15k Hz bandpass filter.

One feature important to the API sound is the proportional Q design where the bandwidth (or Q) of the equalizer narrows as boost or cut is increased. The Q is three octaves wide at 2 dB of boost/cut and narrows down to one octave with 12 dB of boost/cut.

MSRP is $1,695.

For more API information, visit www.apiaudio.com. For more new product announcements, visit http://mixonline.com/products/new/.






Acceptable Use Policy
blog comments powered by Disqus

Mix Books

Modern Recording and Mixing

This 2-DVD set will show you how the best in the music industry set up a studio to make world-class records. Regardless of what gear you are using, the information you'll find here will allow you to take advantage of decades of expert knowledge. Order now $39.95

Mastering Cubase 4

Electronic Musician magazine and Thomson Course Technology PTR have joined forces again to create the second volume in their Personal Studio Series, Mastering Steinberg's Cubase(tm). Edited and produced by the staff of Electronic Musician, this special issue is not only a must-read for users of Cubase(tm) software, but it also delivers essential information for anyone recording/producing music in a personal-studio. Order now $12.95

Newsletters

MixLine

Delivered straight to your inbox every other week, MixLine takes you straight into the studio, with new product announcements, industry news, upcoming events, recent recording/post projects and much more. Click here to read the latest edition; sign up here.

MixLine Live

Delivered straight to your inbox every other week, MixLine Live takes you on the road with today's hottest tours, new sound reinforcement professional products, recent installs, industry news and much more. Click here to read the latest edition; sign up here.

[an error occurred while processing this directive]

The Wire, a virtual press conference offering postings of the latest gear and music news, direct from the source. Visit the The Wire for the latest press postings.