Infinity Alpha speakers

Content:

1. Introduction, why these old speakers?
2. Overview of the Infinity Alpha System
3. Infinity Alpha 50, main speakers
4. Infinity Alpha 20, rear speakers
5. Infinity Alpha Center, center speaker
6. The crossovers and update of components
7. How to replace bad tweeters
8. The new tweeters

Note:
I take no responsibility or liability for what are written here, you use the information at your own risk!

6: The crossovers and update of components

The main speakers has bi-amp crossover filters. The rear speakers has bi-wiring crossovers, they have a common zero in the crossovers and will burn your amplifier if you try to bi-amp them.

Cheaper crossovers are built with bi-polar electrolytic capacitors, even these ones. I will replace them with non-polar capacitors.

When I opened the cabinet and took out the filters I saw, it had been hot here! The resistor to the tweeter crossover was burned. The earlier owner liked to play loud! Here I have replaced the burnt resistor with a new one, I mounted it a bit higher to get better air cooling of it.

Upper row, the old capacitor to the left and the new yellow one to the right. Lower row, the burnt 1 ohm resistor (I guess it's 1 ohm, but it's hard to identify the color ring of this hard burnt resistor) and the new one to the right.

I bought new capacitors to all the speakers crossovers, but left the big 39uF and 56uF capacitors to be replaced later. I want to listen to the speakers and hear if they are worth spending more money on them first. Big non-polar capacitors are expensive.

Heating up the solder machine and start to replace the old components.

It's a bit tight around the new capacitors, but manageable.