any info on Petroff Labs full range speakers?

Hi there, I’m the son of the owner of this long-since gone company. He passed away in January of 2023. My father was not run by a man named ’W. Edward Johansen.’ If there ever was a relationship with such a person he would have been an investor or partner. My dad never had people above him for any of these businesses. As for the drivers I don’t know about PL but Magnitude Acoustics he used Atomic which is still around.

Petroff Audio Labs / Petroff Audio Research is creation of one Michael Petroff. I worked for Mike back in the late 80's building very elaborate home systems. I cannot recall where we sourced the drivers, but they were custom made. Later we started our own line of tube subwoofers for the car audio market under the company IntegralAudio. Mike also sold several analog circuit patents (mostly to control stage/imaging) to Harmon Int'l/JBL et al.

You have a very early set. Hope you enjoy them.

It looks like W. Edward Johansen ran Petroff. You may want to email Mama Jazz? Maybe W. Edward Johansen would be willing to answer your questions.

I was actually looking to find info on the drivers who made them? Are they speaker lab upgraded to petroffs spec`s,like Milo Nestorovic? Who is this Petroff , what might some of his accomplisments be,etc.

What information are you looking for?

They were ostensibly speakers made by Petroff Labs, an unremarkable manufacturer which operated between 1981 - 1984 from Simi Valley, California. Not long enough to really be otherwise remarkable.

http://www.trademarkia.com/petroff-labs-73313299.html

The principal seemed to be one W. Edward Johansen, who now runs or works for Mama Records as per this entry:

http://www.logosdatabase.com/logo/mama-records_75466268

Which seems to be a jazz specialty record company:

http://www.mamajazz.org/

Is that what you wanted to know, or did you want to know something else?