Howdy maker…
There is a post from a fellow who is powering his 2 Emotiva XPA 1
monoblocs 60 watts Class A amps plus a Plinius Class A amp
very high current draw and the P12 handling it …but near it’s limit.
Here is the link:
Your McIntosh C 2700 pre and McIntosh 462 amp driving your
JBL L300/L300a speakers are 93db/watt sensitivity
should be fine…however the ball game changes
if somehow you choose lower sensitivity speakers…
Keep in mind the less sensitivity/watt the more power will
be required of your amp and thus more load on the P12.
PS Audio offers a generous home trial…you could
take advantage of the the Power Play Promo and
get your P12…super deal now going on…
This alone can give you such an upgraded sound stage and quality
that you might just fall in love again with your JBLs and wind p
keeping them…
If the P12 doesn’t improve your sound you have 30 day time window
to return but you must first request an rma…
Give it a shot …you have nothing to loose…
Happy trails friend