I recently bought a pair of the Seismic 15" passive coaxial wedges for $398/pair delivered. The features are interesting: small footprint, internal crossover or active switch for true bi-amp capabilities.
I figured that for pretty cheap money, I'd at least be able to use them for rehearsal vocal wedges or perhaps for some gigs...fairly low expectations. When I got them, the first thing I did was check to see how loud they would get, and if the low end could hold up for bass guitar. I used my GK1001RBII (a lot of power) into a single wedge in bi-amp mode. The wedge did surprisingly well, but I reserved final judgement until using them this past weekend on a gig which was relatively low-key, but still, 2 guitars, bass, drums, in a very lively brick and glass room, for about 175 people. I was surprised to find that a single 15" coaxial passed the test, and in fact, a couple of people complimented the sound. Btw, the drummer is not prone to playing soft, so the wedge was cranked just about to the limits of its capabilities. The tone of the wedge was decent...not great, but not awful. 2 of these wedges for the same gig probably could have overpowered the rest of the band.
I've been burned by Seismic in the past, getting boxes that just couldn't keep up, or with blown/defective speakers. True, you cannot expect many Seismic products to be very good. Every so often, though, you get lucky and stumble across a product that works reasonably well for low $$$. I'd have no problem using these 15" coaxial wedges in a number of situations. They get pretty loud. The sound quality is mezza-mezz...but for some situations, that's all you need. It's the low end of pro-sumer grade gear.
