Wierd I put a reply and it's not here... but yeah SAS makes pretty good stuff... I've seen their other bass tubes... my friend had a 10 and it hit pretty hard... it's kinda nice too cause they're really easy to install... but the bass out of a tube isn't the tightest... but it does hit hard for the size of the enclosure and footprint... if you're just looking to fill your sound out I'm sure an 8 would suffice but it don't think you're gonna get comp sound out of a 8... and these NOS tubes have been around for a year or so and I guess they're pretty good... they're just camouflaged... a lot of my friends back home make their boxes look like tool boxes to keep would be thieves from stealing their stuff