I have a Varmint SSL-250 that was a 1x4 originally.
I converted it to a straight 4 pill and I can confirm that they are mrf454s or the final outputs are. The driver tested like a mrf450..
I've had 2. One with house part numbers and my current one with Motorola labeled mrf454s
The parts you have would drop into your amp but don't forget to rebuild the bias supply for the transistors!
If you don't replace the parts there you'll burn up the new finals immediately
I converted it to a straight 4 pill and I can confirm that they are mrf454s or the final outputs are. The driver tested like a mrf450..
I've had 2. One with house part numbers and my current one with Motorola labeled mrf454s
The parts you have would drop into your amp but don't forget to rebuild the bias supply for the transistors!
If you don't replace the parts there you'll burn up the new finals immediately