I'm building the prototypes with surface mounted drivers, but I sized the cutouts so I can easily go back after completion and do the recesses with a 1/2" rabbet bit. At some point after somebody else within driving distance has built a pair I plan to recess the drivers in mine and we'll compare the two.

My recessed drivers, are very close together. I scribed a vertical line, then walked off the centers with a pair of divider’s…John

I talked to Scott Placke, OEM Business Development Manager of Parts Express, about offering a discount for group build participants who order an entire kit package. The package includes everything needed to build the line arrays except the wood and glue. It incudes the following:

sixteen #295-301 midwoofers
two #264-578 Vifa DX25 tweeters
two #260-304 bi wire speaker terminals
one pkg #081-435 3/4" #6 driver mounting screws
four #260-411 4" ports
one pkg #095-282 solderless terminals
one pkg #095-286 solderless terminals
one roll #260-540 speaker gasketing tape
one 50ft roll #100-116 speaker wire
crossover parts to be determined

The discount for participants in this group build will be 25% off the regular price. I haven't calculated the total yet because we still need to design the crossover and specify values, but the regular price for everything except the crossover parts would be $331.43. With the discount it comes to $248.57.

Special thanks to Scott and other members of the management at Parts Express. Good folks to do business with!

• Group Build Line Arrays

Fred -- what kind of power would you recommend to run these?

The eight watts of my 300B SET amp will power them to levels that begin to realize this potential. I also tried them with the 3.5 watt 2A3 Paramours, and these are fine if you listen only to jazz, acoustic music, and early classical, but they begin to sound congested with highly dynamic music at room filling levels. I haven't tried any higher power tube amps yet, but I expect about 25 tube watts or 50 solid state watts is all the power you would want.