SPEAKER FOAM

[riker1068]

Yes, that is the DC resistance of both in series....that is the seller's pic to show they both are good to go......Mine are all the same & have been running in 2 Sharp 777's for more than a year without any problems at all. They sound good too....

cpl

is the 777 and 1000 using the same amp?

 

[Cpl-Chronic]

Do remember that a multimeter reads resistance, not impedance. Its not a big deal though. And yes, seems to be connected to series.


Where those Bose woofers are going anyway?

If they are used in a normal 2-way configuration, I recommend connecting a 0,10mH inductor (crossover coil) in series with each woofer (+ lead) and connect the tweeter + lead before the inductor. It will make the higher tones clearer, because then you are adding a 1st order (-6dB) lowpass to the woofer and it wont try to reproduce the higher frequencies, which it isn't designed to. That 0,10mH coil will cut a 2ohm driver from somewhere around 3000hz. I didn't find a lower value coil from parts-express, but I would think there is some. Higher ohm driver needs a higher value coil for the same frequency, for example, 4ohm would need 0,20mH, 8ohm 0,40Mh and so on.

I wouldn't do that personally. The inductor choke for the woofers really aren't needed here as the woofers Riker bought are more full range in nature, small hard dustcap for better midrange dispersion & will go as high as 6Khz cleanly to blend better with the tweeters, like most boombox woofers do....same exact concept. If you look at a car's 2 way or coaxial speakers with a woofer & tweeter, there is no coil in series with the woofers, only caps to roll off the tweeter & protect it from lower frequency damage....I gave the advice of using 6.8uF values to bring the tweeter roll-off point lower to 6Khz @ 4 OHMS to match the woofer's range....

Cpl

 

[riker1068]

Yowza. The caps arrived today. They are huge. Like the size of m80s. Hope I didn't get the wrong size

 

[Beosystem10]

Well they say 6.8μF on them so assuming that the WV rating is correct or higher, you'll be fine.

 

[riker1068]

Finally all set in the new house from end of october. Now I can get back on some projects. Of course I misplaced the monster caps (shown above) grabbed likely another 6 boxes since this all began. Can't wait to get started.

 

[Cpl-Chronic]

Cool...waiting to see what your next move is on those BOSE outers......They are designed to compliment the tweeters so no low pass coils are needed & would blend better as open full-range speakers...They are from a BOSE caddillac system so they are really good speakers...

Cpl