 
|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
|
|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
205.175.225.23
any ideas ?Any links to such a device ????????????
(like cap, coil, resistor, no active compensation)
Follow Ups:
BSC circuts simply shelve down all frequencies above the step frequency. Only by comparison to the frequencies above the step does the bass range seem boosted (when in reality only the bass in un-affected). Since tweeters usually require some attenuation anyway to level-match woofers, incorporating the BSC into the speaker crossover is relatively easy. A tone stack is also a passive device, but again only realizes boost in comparison to a shelved down over-all frequency band; therefore such circuts have an insertion loss & is why tone stacks usually include an attendant gain stage to make up for that loss. Likewise a passive BSC before the power amp will also decrease gain if no additional gain stage is included. Standard reactance formulas are: 159,000/frequency*impedance = answer in uF & 159*impedance/frequency = answer in mH.
Speaker level circuits affect the Q and thus box size, not to mention wasting power.For amplifier drive compensation ideas see:
http://sound.westhost.com/bafflestep.htm
Also read:
http://trueaudio.com/st_diff1.htm
(the rcf with delta pros)I'm thinking they can sit on a box i already have (gamma 15" i got 2 yrs ago after i sold the jbl m151's, yielding f3 sealed near 80hz, box is 21" cube sand walled on 2 sides and back, perhaps needing a 5.58mH inductor to run passively as a 1.5 way woofer module). Seems same sensitivity as the deltas, and huge xmax for SLAM. lol
Oh yea i do have the eminence gamma 15's with the qts = .3, they are light which would line up with the 18lbs weight of current line. They're running sealed 2.4fts making an f3 near 80hz. I havn't been able to find the "new" speced gammas vs the older ones.
Nevermind i found some older gamma specs with a qts near .88, mine are not that, they seemed same resistance to movement as the deltas.
The more air moved the better !!!!!!!
norm
...of equation for the capacitor calcs, and I've never seen the inductance formula; TYVM.BTW, the '159,000' I learned as 159,155, JIC you're as obsessive/complusive as I am sometimes. :-)
This post is made possible by the generous support of people like you and our sponsors:
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
