Blog, Speaker Repair Results

Peerless K040-MRF Midrange Repair

Posted on by Cathy
K040 DSCN0090 1
10
Feb

This Peerless midrange was used by many manufacturers including JBL and Infinity. It is a great mid that is no longer available. Fortunately, the only real problem that generally occurs is caused by foam surround dry rot. You can restore your mid by sending to us for repair, or by using the RFK4.25 DIY refoam kit. This foam can only be applied with the roll facing up, not inverted as it was originally applied. The cone will slightly touch the foam roll itself, but this is not a worry with a mid like it would be with a woofer because a mid won’t excert the same and cause a problem.

Here is a spec sheet we found for the original midrange and some pictures of our recent repairs. You can click on any picture for greater detail.

By the way, the original mids have an inverted roll (foam roll down). When you repair, the foam will go roll up.

Cathy

Cathy grew up in NY, moved to Florida in 1975 and graduated from the University of South Florida, with a degree in broadcasting. She and her husband Glenn started The Speaker Exchange in 1977. (Glenn later moved into Audio/Video sales and installations). In 1979, Cathy went to California for JBL speaker repair training and later received advanced training from Frank Spain, the then head of the Electro-Voice service department. She has continued to advance her audio education through many CES, NAMM, and CEDIA trade show classes.

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