And note that hot melt adhesive is for paper, kids crafts, will absorb moisture after a short time and release.
So this is just another Roadkill project. Must be number 5 or 6 by now.
Having decided on the use of the spare Sansui driver and using one of my spare sets of woofers based solely on the fact that they fit the existing routered rebates perfectly I worked out a crossover based on the woofer tester results and experience using only what components I had in the stash.
Pete you may remember these woofers and the tweeter from the Dick Smith closing down sales a decade or so ago.
It's lucky that I really enjoy tinkering as these boxes were really of s*** quality and I only used them as the front baffles were ready to go
Based on the results of the woofer test the box is too large and it will be larger again when stuffed so a subwoofer will be done soon so my mate has decent bass.
Approximate XO points are 400 and 3500 and using my usual asymmetric style but no Zobel network on the woofers.
Having decided on the use of the spare Sansui driver and using one of my spare sets of woofers based solely on the fact that they fit the existing routered rebates perfectly I worked out a crossover based on the woofer tester results and experience using only what components I had in the stash.
Pete you may remember these woofers and the tweeter from the Dick Smith closing down sales a decade or so ago.
It's lucky that I really enjoy tinkering as these boxes were really of s*** quality and I only used them as the front baffles were ready to go
Based on the results of the woofer test the box is too large and it will be larger again when stuffed so a subwoofer will be done soon so my mate has decent bass.
Approximate XO points are 400 and 3500 and using my usual asymmetric style but no Zobel network on the woofers.
Attachments
Pix of the drivers and screenshots of the test results.
As you can see the new drivers have much bigger magnets.
I had to do a new tweeter hole and my hand held router work isn't the best but it has to do
As you can see the new drivers have much bigger magnets.
I had to do a new tweeter hole and my hand held router work isn't the best but it has to do
Attachments
You stated "I made these from some roadkill boxes I picked up and all the cheap hot melt glue seams look like they have dried out and vibrated loose." ...
Sorry I was not reading the post correctly and I was tired. Yes and maybe not so good for gluing XOs either.
I don't think they will come apart now
I don't think they will come apart now
OK I need some small help on a XO question.
I didn't use a conjugate with these woofers and I think there is too much of the HF getting though to the midrange.
I'm thinking of that trick that is used on bass guitar speakers to cut HF by adding the conjugate directly to the driver itself.
I get values of R=8.16Ohms and C=8.16uF when I plug the values into a calculator and based on measured specs.
Those values are somewhat different to the ballpark I have used in the past on similar woofers [ which were 15uF and 10 Ohms] I'd need to go shopping to buy components to match those values; so is an approximation good enough?
I've used Strange Second Order passes before but only from plans and while I'd like to implement one for these woofers I don't have any idea of how to calculate one.
Which component do I change most to get less HF coming thought these drivers>??
I didn't use a conjugate with these woofers and I think there is too much of the HF getting though to the midrange.
I'm thinking of that trick that is used on bass guitar speakers to cut HF by adding the conjugate directly to the driver itself.
I get values of R=8.16Ohms and C=8.16uF when I plug the values into a calculator and based on measured specs.
Those values are somewhat different to the ballpark I have used in the past on similar woofers [ which were 15uF and 10 Ohms] I'd need to go shopping to buy components to match those values; so is an approximation good enough?
I've used Strange Second Order passes before but only from plans and while I'd like to implement one for these woofers I don't have any idea of how to calculate one.
Which component do I change most to get less HF coming thought these drivers>??
Testing drivers with WT3
I used the calculated values as near as I could get with using multiple caps wired together but the flattest impedance graph I got was with 22uF and a 10Ohm resistor, those values also reduced the secondary resonance at 500Hz too.
Interesting experiment and I am wondering how the addition of a Zobel will affect the sound, if at all
I used the calculated values as near as I could get with using multiple caps wired together but the flattest impedance graph I got was with 22uF and a 10Ohm resistor, those values also reduced the secondary resonance at 500Hz too.
Interesting experiment and I am wondering how the addition of a Zobel will affect the sound, if at all
Almost finished but I am waiting on grill clips from AliExpress. Sound pretty good for garage speakers and resuscitated road kill, but the bass isn't as solid as I'd like.
What they are is LOUD
They need a couple of hundred watts of dual 12" woofers to get the next octave down
What they are is LOUD
They need a couple of hundred watts of dual 12" woofers to get the next octave down