Seas W15CY-001 and T25CF-001 2-way Design
This design uses a single inductor in series with the woofer, with some additional parallel circuitry. The high pass has two capacitors, and film caps would be a good choice there. No box or cabinet is specified.
FW305+15M4624G+XT25BG60 3way Crossover Design crossover “points” at about 400 Hz/ 1.9 kHz/ 3kHz This design uses the Fostex 12″ woofer in 3.0 cf3 vented with two ports each 3″ x5″, add 1″ if using double flared. Scanspeak 15m midrange in 0.1 cf3 sealed. The tweeter is a high output Ring Radiator with phase plug. Two
SB13PFC25-04 and H1396 Passive Crossover Design Crossover point about 3.2 kHz. Average SPL about 90 dB. Two high pass caps. Cabinet volume unspecified.
Crossover points @ 200 Hz and 3kHz. Complex network with fairly high parts count especially in the midrange section. Two primary high pass caps. Woofers in 4.0 cf3 sealed, mids in 0.3 cf3 sealed
MW16P-8 x2 + T25CF002 MTM Crossover Design Crossover point about 2.2 kHz. World famous Millennium tweeter. Enclosure: 1.5 cf3 with two straight vents 2″ x 6″ each
Satori MW16P-8 x2 + TW29R MTM Crossover Design Crossover point at 2kHz. Two larger caps in high pass circuit. No enclosure specified.
Seas H1571 + H1189 2-way Crossover Design Crossover point about 2.8 kHz. Very simple and clean design with single hi pass cap. Woofer in 0.7 cf3 with single straight port 2″ x 5″.