To run these specs on the old RS 40-1354 and come up with cab dimensions and vent size. I'm using two drivers back to back, side firing and using them for LF duty. Any suggestions on stuffing would be great. I was gifted with a small stash of these and want to do something with them. No knowledge of design software. Thanks for any help you can give.
Specs that I can find:
RE = 7.09 ohm
f0 = 56.0 Hz
SD = 0.0083 m^2
Mmc = 6.16 g
QM = 3.46
QE = 0.537
QT = 0.46
Vas = 0.013 m^3 = 0.457 ft^3
eta (2 pi) = 0.414%
Sensitivity 88.7dB/2.83v/m
Specs that I can find:
RE = 7.09 ohm
f0 = 56.0 Hz
SD = 0.0083 m^2
Mmc = 6.16 g
QM = 3.46
QE = 0.537
QT = 0.46
Vas = 0.013 m^3 = 0.457 ft^3
eta (2 pi) = 0.414%
Sensitivity 88.7dB/2.83v/m
OK, I plugged in your values & got this...when you said running two together, I'm assuming you have two drivers in an Isobaric compound, whereby you take the two drivers, have one facing forward on the BACKSIDE of the baffle, as usual, and the second one one the outside facing in, magnet side facing out.
Example one, recommended...10 liters, fb 48.96, 47mm diameter port, 179mm long...performance, -3.07Db@45.25 hertz
Tweaking the tuning, I got a 17 liter box tuned to 43.8 hertz, for a total response barely into the thirties at -3.02Db @ 38.96 hertz. 47mm diameter port (inside diameter btw), 122mm long.
Since we have no power rating in watts, nor an Xmax value (how far the cone can travel) we don't know whether or not the air moving thru the port will be "too fast"...
-----------------------------------------------------------------------Rick......
Example one, recommended...10 liters, fb 48.96, 47mm diameter port, 179mm long...performance, -3.07Db@45.25 hertz
Tweaking the tuning, I got a 17 liter box tuned to 43.8 hertz, for a total response barely into the thirties at -3.02Db @ 38.96 hertz. 47mm diameter port (inside diameter btw), 122mm long.
Since we have no power rating in watts, nor an Xmax value (how far the cone can travel) we don't know whether or not the air moving thru the port will be "too fast"...
-----------------------------------------------------------------------Rick......
Thanks for responding
Actually I'm doing them side firing magnet to magnet. Will that make a difference? Thanks.
Actually I'm doing them side firing magnet to magnet. Will that make a difference? Thanks.
OK, so you're doing two drivers in one enclosure? If this is the case, if your using one amp channel to drive both drivers & you've got one big choke to cutoff frequencies higher than, say 80 hertz...the box is bigger, as is the vent.
I made a mis-calculation on the specs before, I was using an isobaric compound for the box size.
If you have ONE enclosure, both drivers, say facing away from each other, wired as one channel driving both drivers...total internal volume would be 66 Liters. The port should be 102mm diameter, 115mm long. These port pipe internal dimensions can be literally any measured size you would have available, within reason.
Now if you have two stereo channels your going to drive a single box, with your side drivers, half the internal size, 33 Liters...an internal divider, each side will have their own ports, 82mm diameter, 186mm long..
Either of which is reaching down below forty hertz.
-------------------------------------------------------------------------Rick........
I made a mis-calculation on the specs before, I was using an isobaric compound for the box size.
If you have ONE enclosure, both drivers, say facing away from each other, wired as one channel driving both drivers...total internal volume would be 66 Liters. The port should be 102mm diameter, 115mm long. These port pipe internal dimensions can be literally any measured size you would have available, within reason.
Now if you have two stereo channels your going to drive a single box, with your side drivers, half the internal size, 33 Liters...an internal divider, each side will have their own ports, 82mm diameter, 186mm long..
Either of which is reaching down below forty hertz.
-------------------------------------------------------------------------Rick........
