Rebuilding a Radio Shack Nova 7B Speaker - Part 2 - Making Repairs 

Nice speakers I had a pair before I love the front cover and the vintage look!

Excellent!

Wow! I purchased a pair of the exact same speakers yesterday at a thrift store for 6 bucks. I watched part one and two. Anxiously wanting to see the results of your before and after audio test I searched for part three. Then I noticed that part 2 was uploaded only 3 days ago, lol. I will be watching part 3 when you get it up. Thank you for the very detailed and easy to follow information. I am confident that I can update my speakers the same except for soldering the new capacitors, I will get help with that. Or maybe get a soldering iron and practice before attempting. Thank you Sir.

I like the music it reminds me of “how it’s made” lol

I tried keeping an eye on the tip of the soldering iron, but it hurt!!! Sorry, I just couldn't help my self!!!! Thanks for the informative video!!!!

This 3-part video is surely the most viewer friendly crossover service how-to I've seen. Each step is clearly demonstrated and bristling with important details (including safety advisories!). Basic technical aspects of measurement and crossover electrical function are presented in simple enough terms to lend a sense of the principles involved without bogging down in the maths. This effort should inspire confidence in even the most nascent hobbyist. There are a couple of minor corrections to be made in the crossover schematic (at 5:16): The mid/tweeter shunt inductor is actually 1.0mH rather than 10mH. The decimal point is barely discernible in your sample (at 4:52). Inductors in my own Nova-7B's are much more clearly labeled. The HF Compensation switch position labeled "Normal" is actually the "High" setting -- all series resistors are bypassed, hence will yield the highest tweeter output. Inversely, the position labeled "High" puts the 2Ω resistor in series with the tweeter for the "Normal" setting. These are mere quibbles that don't detract from the excellence of this video production. Bravo!

That woofer looks like the woofers on the Optimus one that I used to have.

Just wanted to know if the woofer surround is foam that needs replacing or rubber that doesn't- thanks! I did subscribe.

Great how-do video. The music is dynamite, by the way.

Do you have to reinstall the fiberglass insulation inside the Nova 7B's?

You were wise to remove the fiber Glass,idid the same thing on some bookshelf bostons I have it really improves the midrange in my opinon!

Usually, it is the tweeters that blow on these. Be very careful, they are super hard to find.

Why not use a polypropylene capacitor as non polarised caps will give a kind of distortion as the waveform goes from plus to minus and back? It is such a cheap upgrade when only one cap is required per crossover. Apart from that, the video shows what needs to be done and how to do it.

I'd have used gloves and a mask when handling that fibreglass, vaccuumed the rest out of the cabinet, and replaced it entirely. Awful stuff.