Bought here at Audiogon from a well-known vintage tube amplifier maker, who apparently has used these to tune his amps. Unfinished baltic birch. Expectedly, I used these in small rooms with low-power SET amps with surprisingly good results. It is difficult to find fault with the sound given this small enclosure and 3" drivers. The backloaded horn design is certainly interesting to experience. They also have been handy due to being portable. They measure 16.5"x8.0"x 6.0". Shipping dimensions are an estimate.