For those among you who are budding designers and experimenters we have a range of products from Intertechnik to assist your speaker design projects. 1384653: Intertechnik Multiresist, 0.1R to 100RA development tool for loudspeaker designers / experimentors. This solid board houses 39 Intertechnik 10W ceramic resistors of differing values.… 1384652: Intertechnik Multicap 0.1uF to 100uFA development tool for loudspeaker designers / experimentors. The thick board houses a large muilti-tapped capacitor, providing values from 0.1uF… 1384650: Intertechnik Multicoil 0.39mH to 4.7mHA large air core multitap inductor with16 taps from 0.39mH to 4.7mH, great for developing. 1384651: Intertechnik Multicoil 4.7mH to 22mHA large ferrite multitap inductor with taps from 4.7mH to 22mH. Great for the development of speaker crossover.