1951 Pulse Techniques Pultec EQP-1 Program Equalizer

Sep 1, 2006 3:31 PM


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.

Pultec founders Gene Shenk and Ollie Summerland unveiled the first passive program EQ in 1951. This EQP-1 was based on filter circuits licensed from Western Electric and sounded great, but suffered the gain insertion losses typical of any passive filter, so the duo upgraded their original unit to the EQP-1A, which followed the EQ section with a gain makeup stage using a push-pull design with 12AU7, 12AX7 and 6X4 vacuum tubes. Designed for broad equalization of program material, the EQP-1A had four low boost/cut frequencies, three high-cut frequencies and a choice of seven HF boost points, along with a bandwidth control for shaping the high boost curve.

Like many boutique entrepreneurs, Shenk and Summerland built every unit to order by hand in their true two-man operation. Other Pultec units included the EQ-H2 high-frequency equalizer, the MEQ-5 mid-band EQ and the EQP-1A3 (an EQP-1A in a two-rackspace chassis), as well as solid-state versions, which had silver-face front panels. The company folded decades ago, but its spirit lives on in products such as Manley Lab's Enhanced Pultec EQP-1A, an updated version with improved sonic performance.

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



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.