Has anyone been able to compare the LP to the WA6 (non-SE)?
I own both a LP and a WA6 and use both amps every day. I also own a 6SE.
It depends on the headphones used. For me the all tube WA6 has an enthralling sound that none of the hybrid amps I have tried can equal .
Make sure that any used WA6 you are considering buying has the psuedo dual power supply feature which early production units of the WA6 did not have.
I use Telefunken ECC82 tubes with adapters made by head-fi.org member Deyan with the WA6 and 6SE which I think sound better than the 6 series driver tubes Woo recommends. Yet, the 6DR7 tubes are also very good with the WA6 or 6SE if you don't want to mess with adapters.
As far as bass impact, that too is headphone dependent. The WA6 can pack a wallop with certain headphones (for example, Sony MDR V6) but has less bass impact than the LP with some harder to drive headphones that I use. It comes down to synergy.
I tend to use the Woo more for music and the LP more for movies and casual listening just to save running time on the rare rectifier tubes I have in my Woo.
The WA6 is a great amp but you might want to save up a bit more and buy a used WA6SE 1st generation amp for the extra power and gain that the SE has.
Some Woo amp lovers say the WA6 is a little better sounding within its power limitations than the SE, but I like both the regular 6 and the SE. It is hard to choose a favorite. They sound similar but they do not sound the same. When I need the extra power, I use the SE.
I do not recommend the 2nd generation WA6 or WA6SE because the 13 series driver tubes used by the 2nd generation amps seem to be harder to find than the 1st generation's 6 series driver tubes.
You can also use the WA6 and WA6SE with 6SN7 or 7N7 driver tubes with adapters made by Deyan if you want to go that route.