ampeg ba115hp

I purchased the Ampeg BA115HP new at GC about 6 years ago for $250. It had been marked down because it was a discontinued model and I couldn't pass it up at that price. It has been a good amp and I have played a ton of gigs with it. Recently it started crackling after about an hour of play and...

Something went with my Ampeg BA 115 HP it's not working correctly. It's very quiet and when I play it gets really quiet then when I stop a minute and play first note will be semi loud. And every pluck after it gets quieter and quieter until no sound. And the power light will get dimmer and...

I have the above amp and it is in the shop having a transister replaced that caused the speaker to fail. I am wondering if anyone knows what the original speaker might have been for this amp. What is in it now is a Celestion BN15-300S. I can get that speaker and I am trying to decide of that is...