A friend of a friend has a 60's Hilgen bass amp he wants me to check out. All tube, maybe 25 watts, 15" speaker (possibly a Jensen). Supposedly it was made by former Ampeg employees in NJ. Has 7951A power tubes. Anyone have any info on or experience with these? The little I've found online says either its a reasonable Ampeg clone or utter crap. I'm looking for a good sounding low volume home practice/recording amp, figure tubes would give me that old school thump I'm after.