|
High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
For Sale Ads |
Use this form to submit comments directly to the Asylum moderators for this forum. We're particularly interested in truly outstanding posts that might be added to our FAQs.You may also use this form to provide feedback or to call attention to messages that may be in violation of our content rules.
Original Message
RE: altec 414-16b and 902-8t with 511b
Posted by freddyi on January 1, 2017 at 01:23:18:
also ask over at Lansing Heritage
a crossover properly designed provides a good summation of the drivers and protects the delicate high frequency driver from being destroyed by lower frequencies.
LINKS - Lansing Heritage
http://www.audioheritage.org/vbulletin/forumdisplay.php?6-General-Audio-
DiscussionPi Speakers Audio Roundtable - you might PM Wayne
http://audioroundtable.com/forum/index.php?t=thread&frm_id=33
JE Labs
JE Labs 2-way altec horn page
http://jelabs.blogspot.com/2014/01/altec-2-way-horn-system-redux.htmlJE Labs update crossover to contour the HF
http://jelabs.blogspot.com/2014/01/altec-2-way-xo-update.htmlIF 414 variants are always 16 ohm (?), then I guess JE Labs early try with the N1600 would work to get you started - I'm not sure where to source the 30 ohm potentiometer. You could use two terminals of an L-pad in place of the pot.
here's the basic diagram of a parallel 2-way crossover with 12dB electrical slopes - if inductor L1 and capacitor C2 were removed then it would be 1st order and 6dB per octave electrical slopes
here's a 6dB per octave series crossover schematic - JE Labs is using a simple series network with their 414 and Altec compression driver and claims it sounds better than whatever parallel network they tried
the series type works in a kinda see-saw fashion. At high frequencies, the coil's impedance is relatively high and the cap's impedance low and vice versa for low frequencies