Finished these last weekend.

Size slightly modified from 620...a little wider and less deep...same volume.

Using GPA 416 and 902. Horn is P-Audio (JBL clone), with passive xover at 1,200Hz.

Euro birch 19mm ply with solid bracing.

Very happy with sound...rich bass, and articulate mids/highs.

Using 300B SET amp.

Yet to decide finish, stain etc.

Andrew