IceMatch DIY amplifier to drive a pair of active 3-ways

[mtidge]

I spend most of my time here in the multi-way forum. So I'm posting this here because there have been discussions looking for amplifiers for DIY active speakers.

Thread 'IceMatch Six Channel Power AMP'

2025-01-07 3:46 pm

I decided I wanted to replace the very heavy 8-channel SpeakerCraft BB865 Class A/B 8-channel amplifier I use to drive some active 3-way stand mounts in my office. There were no problems with the existing sound, but the amplifier was causing the shelf it was sitting on to sag a bit. I wanted something lighter, so I made my mind up to build a 6-channel class D amplifier to replace the 8-channel class A/B. I decided to use pre-built class D modules rather than build something from scratch because I never had a talent for trouble-shooting switching power supplies, and class D circuits seemed...

• mtidge
• Replies: 0
• Forum: Class D

• 

https://bellarossafabrica.net/6-channel-amplifier

 

[motokok]

Great job and great write up!

btw, how do you like the dbx PA2? It seems really convenient. Do you have any passive protection components for the drivers?

 

[mtidge]

Thank you

The PA2 is okay, I had been using a QSC basis but it was acting up so I decided to replace it. The I like the flexibility of the QSC better and Auto EQ of the PA2 more. After I swapped the PA2 I popped the cover off the QSC and the power connector was loose, once I reseated the connector it was stable again but I don't feel like going back.

I have 22uF capps in line with the ribbon tweeters, but the mids and woofers are directly connected to the amps. I'm confident the IceMatch won't hurt the drivers and only a problem with the crossover would damage the tweeters, therefore I have the caps.