CIRCUIT BOARDS Old CoIonya#39;s boards are made of top quality epoxy glass, 2 oz . copper, reflowed solder coated material for case of constructing projects that have ... POWER SUPPLY 5x55/8aquot; (3.791 $12.95 L-2: WHITE LED OVERLOAD aamp; PEAK METER 3x6a [1:80] One channel. ... The B37 has a larger VC and 10W more power handling. ... (times 2), f3 = 88.2Hz. This would make the smaller VC B25R the preferable drivers if I have applied the Cookbooka#39;s recommendations correctly.