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ESS 689-1220 12" Cast Frame Woofer Speaker
What cabinet volume is needed to get a -3db of 25hz and 30hz using this woofer and the matching passive radiator? What is the optimum cabinet size to get the best low frequency response?
This is a bit of a tricky woofer to model with a passive radiator. The optimal volume that Bassbox spits out is almost 9 cubic feet. You can go much smaller, such as 2,5 cubic feet and still get a tuning frequency around 27 Hz with 100 grams of weight added to the PR. With no weight added, the tuning frequency rises to about 31 Hz.
Date published: 2014-10-06
Can these replace ALL 12" ESS woofers? The ones I would be replacing are #680-0019 because I can't find a recone kit anywhere.
These are designed to replace the ESS AMT woofers although in the right application they can work for others as well.
Date published: 2014-07-07
Is this product a direct drop in for the ESS AMT1b speaker as well as for the ESS monitor speakers
I think these are all the same woofer for the tower or the front firing hiel with the passive 12 on back,memory from 1977 has sorta faded, i put two ess 10's and two hiels on the back deck of 1978 sirocco and vented the box. small craig amp cassette deck for it's day it ruled
Date published: 2011-11-18