Normal
Ross,Having designed and extensively tested the Keystone sub over 10 years ago (where did that decade go!), have also tried to keep up with other commercial and DIY designs made before and after. In terms of output per size and efficiency with 35Hz extension, ease of build and transport, it still rates quite well. If the form factor works for you, go for it.The Keystone sensitivity is actually greater loaded with a pair of Eminence LAB12 than the BC18SW115-4, but the greater excursion and heat dissipation of the 18SW115 allows for more output with less thermal compression.Art
Ross,
Having designed and extensively tested the Keystone sub over 10 years ago (where did that decade go!), have also tried to keep up with other commercial and DIY designs made before and after. In terms of output per size and efficiency with 35Hz extension, ease of build and transport, it still rates quite well. If the form factor works for you, go for it.
The Keystone sensitivity is actually greater loaded with a pair of Eminence LAB12 than the BC18SW115-4, but the greater excursion and heat dissipation of the 18SW115 allows for more output with less thermal compression.
Art
