Category Archives: Blog

How To Find a Smaller Foam

The perfect refoam kit for your speaker’s measurements might not exist. Often you must adapt an [...]

Emerson 8″ Field Coil Speaker Repair

We have no problem with Vintage Field Coil Speaker Repairs! We match the new parts [...]


Cerwin-Vega Historical Perspective

Cerwin-Vega – From the Beginning In the last 50 years, Cerwin-Vega has grown from a [...]

What’s Old is New Again

JBL is getting ready to launch the new Everest DD66000. It is well named because [...]

How To Measure the Cone Depth

Measure the Cone Depth from the lowest part of the Throat where it attaches to [...]

DIY Eminence 10446 Recone

These pictures were sent from Bo in Denmark showing the results of his DIY repair [...]

JBL 2204 Recone Results

JBL 2204 Reconed with Genuine JBL C8R2204 Recone Kits for National Sound Company

JBL 2414H vs 2414H-1 Drivers

What are the differences between the JBL 2414H and 2414H-1 drivers? These drivers have different [...]

Under Powering Can Cause Speaker Damage

Any speaker can be damaged with too much power. Low Power Can Damage all speakers, but especially High [...]


How To Understand Impedance

Speaker Impedance varies with frequency. You will often see Impedance measured in ohms using Ω (the Greek [...]

How to Open the Cone to a larger voice coil opening:

Lay cone face down on table top put top of voice coil onto voice coil [...]

Ohm F Speaker Repairs

  Ohm F speaker repairs fall into the Specialty Catagory. These repairs require quite alot more [...]


Don Lindich: Consumer Advice

Q: In preparing our living room for the new additions, I was moving some 1978 [...]


How to Attach Foam to Polypropolene Cone

It is more difficult to get adhesives to bond to a polypropolene cone than to a [...]

JBL Reverse Polarity

In the golden olden days of speakers, the issue of whether the first motion of [...]


Over the Tannoy

Tannoy Ltd, an English manufacturer of loudspeakers and public-address (PA) systems, began in 1926 under the Tulsemere Manufacturing Company. [...]


Piezoelectric speakers

 Piezoelectric transducers, frequently used as beepers in watches etc., are often used as tweeters in [...]

Infinity RS Repair

Damaged Infinity RS Speaker-  Typical Foam Surround Dry Rot Problems. The top two pictures show [...]

How do Speakers Work?

A speaker converts electrical energy to mechanical/acoustical energy. It uses a coil of wire, which [...]

DCM Time Window 6″ Recone

We recently reconed these 6″  AD7066 from a DCM Time Window. The woofers received new [...]