We are currently sold out of BSP50s - Unfortunately the situation in the middle East has delayed delivery until mid June - there are plenty of alternatives online - see this blog post by Martin
The 50 Watt Brennan BSP50 bookshelf loudspeakers are a perfect match for B3's size and power.
Dimensions 22cm (H) x 14.5cm (W) x 18cm (D)
The speakers have a detachable black cloth grille and are supplied with a pair of 3m speaker leads for use with B3 [4mm plugs to bare wire]
BSP50s are sold in pairs - the price is for the pair.