The wattage of the power amp is more of a matching issue between amp and speakers. The key matching preamp to amp is the output impedence of the preamp and the input impedence of the amp. The general rule of thumb is that the input impedence of the power amp should be 'AT LEAST' 10X's the output impedence of the preamp. I say 'AT LEAST' because the higher the ratio the better, in fact some manufacturers will recommend a 20-30X ratio to be the minimum. In other words, your PrimaLuna Prologue 3 tube preamp has an output impedence of 2800 ohms, which is very high for a preamp. You should look for an amp with an input impedence of AT LEAST 28Kohms. 100K would be better yet.
As for reco's it depends on what type of sound you are looking for. If looking for rich, warm sound, there currently is an older Jeff Rowland Model 1 amp, which has adjustable input impedence of 600 ohms, 20Kohms and 100Kohms. Obviously you would be best to use the 100Kohm setting. It also has selectable gain of 20, 26, 29.5, 32 dB which should help match your preamp even more.
If you're looking for more power and/or a a faster, more transparent amp, there is a Belles 350A Reference for sale with an input impedence of 50Kohm.
Obviously these are only two, there are more amps out there. With your preamp's high output impedence you will just have to be careful that the amp's input impedence is high enough to match. FWIW, impedence mis-match is not lethal, it will just roll off the high's and low's.
Cheers,
John
As for reco's it depends on what type of sound you are looking for. If looking for rich, warm sound, there currently is an older Jeff Rowland Model 1 amp, which has adjustable input impedence of 600 ohms, 20Kohms and 100Kohms. Obviously you would be best to use the 100Kohm setting. It also has selectable gain of 20, 26, 29.5, 32 dB which should help match your preamp even more.
If you're looking for more power and/or a a faster, more transparent amp, there is a Belles 350A Reference for sale with an input impedence of 50Kohm.
Obviously these are only two, there are more amps out there. With your preamp's high output impedence you will just have to be careful that the amp's input impedence is high enough to match. FWIW, impedence mis-match is not lethal, it will just roll off the high's and low's.
Cheers,
John