TOM,
Congratulations on your acquisitions.:thmbsp:
You must realise that
you are in the prime position to inform
us as to,both how those two Onkyo units sound in isolation,and how they sound compared to one another.
We eagerly await
your asessment.:yes:
As Bully stated I just got an Onkyo P-303 preamp a month ago,and I think it is an excellent preamp,which I would broadly compare sound-wise to a "stock" Kenwood 700C.
Anyone who knows my tastes in gear,knows that's a high compliment.
I've never heard(or seen) either the 308 or the 388.After hearing the P-303,I'd love to hear them.
Therefore I will await your asessment of them.
My advice;leave each unit in your system for a least a week before settling on your verdit,since in my experience vintage gear changes a lot in sound quality as it settles-in.Don't rush your verdict.
Don't fret if you can't pick any difference between the two units,some gear just does sound alike.Simply tell us what you hear.We'll welcome your input.:thmbsp: