Ok so here it is. The broke enthususiast found some 8 ohm 3 way house speakers he forgot he had. ANyway, I parted out the midrang and tweeter, and hooked them up in my car for some extra high frequencey. (they look ugly right now, but sound suprisingly good.
My question is, when you hook up these drivers with a 4 ohm 6.5, wired in series, and wire them in parrelal with a 4x6 speaker, what kind of load would that produce? I wouldn't know how to find that out, and the only info I have in the liberated mids and tweets is that they came from an 8 ohm 3-way set.
Also, I'm running a passive crossover that is 200hz @ 4 ohms. What would this crossover be pushed to at this crazy ohmage?
Replies (10)
cplkittle on 12/13/2006 13:34:07
The only way to tell you exactly is to know the resistance (ohm load) of each speaker. Sometimes it is stamped on the back.
ShootuhMcBustaCap on 12/13/2006 13:42:56
Theyre is nothing in the back of that to tell. I wish it was. I guess it will be shrouded in mystery.
admin on 12/13/2006 15:55:47
Do you have an ohm meter?
ShootuhMcBustaCap on 12/13/2006 18:02:13
I have a multimeter, but the batteries are dead. I'm not sure if they can be replaced, as It has a hard plastic case, and I do not see a battery port.
swez on 12/13/2006 19:49:28
Some meters have a series of small screws on the back panel that can be removed and then you'll have access to the battery.
I'm not sure I understand the wiring scheme you are trying to use here. However, some 3-ways use a 4 or 8 ohm woofers and 8 ohm tweeters and MR. The crossover is designed in such a way that the net load the amp see's, will be 8 ohms per box.
If you ran a 4 ohm and an 8 ohm wired in parallel, the net result is 2.67 ohms. Am amp can handle that load fine in most cases. However, a HU amp will not like it at all.
Does that help?
Swez
cplkittle on 12/14/2006 02:13:18
you have an 8ohm 3 way wired in parallel with a 4ohm 6.5, then wired in series with a 4x6?
I think that would be 4.67ohms, which would change your crossover point to 234Hz.. not significant.
If they were all parallel it would be 2 ohms.
and ofcourse that would make it 100Hz
ShootuhMcBustaCap on 12/14/2006 16:37:25
Let me reiterate here. The 8-ohm speakers woofers were shot, so I only used the Mid and tweeter. That set is wired in series with the 6.5 4 ohm, and then the series wired speakers just listed are wired in parrelal with the 4x6 4 ohm.
Suprisingly enough, this setup is killer!! So ugly, But it sounds great!!
ShootuhMcBustaCap on 12/14/2006 16:40:05
Also, I'm not asking if this would be functional, as it already is, I'm just curious of what load and crossover point this would present, and how you guys got that calculation. Unless all the speakers are of the same impendance, I don't know formulas for caculation that impendance.
Anyway, thanks again for the help, This rig just has me thinking alot.
ShootuhMcBustaCap on 12/14/2006 16:47:33
Ok The multimeter is now fixed. Now where would and how do I measure the ohms. Sorry guys, I have never used a multimeter before, but I am estatic to have one.
ShootuhMcBustaCap on 12/14/2006 17:07:33
Alright, My multi meter just died again, as i just pulled a battery from somewhere else and put it in the MM. I plugged the test leads into the binding posts on the crossover network on the mid/tweeter, and the reading went from 14-16.5 ohms, averaging about 14.5 overall. I measured on the scope frequency of 200 ohms. I need to get new nine volt batt, and I'll check again
My question is, when you hook up these drivers with a 4 ohm 6.5, wired in series, and wire them in parrelal with a 4x6 speaker, what kind of load would that produce? I wouldn't know how to find that out, and the only info I have in the liberated mids and tweets is that they came from an 8 ohm 3-way set.
Also, I'm running a passive crossover that is 200hz @ 4 ohms. What would this crossover be pushed to at this crazy ohmage?
Replies (10)
cplkittle on 12/13/2006 13:34:07
The only way to tell you exactly is to know the resistance (ohm load) of each speaker. Sometimes it is stamped on the back.
ShootuhMcBustaCap on 12/13/2006 13:42:56
Theyre is nothing in the back of that to tell. I wish it was. I guess it will be shrouded in mystery.
admin on 12/13/2006 15:55:47
Do you have an ohm meter?
ShootuhMcBustaCap on 12/13/2006 18:02:13
I have a multimeter, but the batteries are dead. I'm not sure if they can be replaced, as It has a hard plastic case, and I do not see a battery port.
swez on 12/13/2006 19:49:28
Some meters have a series of small screws on the back panel that can be removed and then you'll have access to the battery.
I'm not sure I understand the wiring scheme you are trying to use here. However, some 3-ways use a 4 or 8 ohm woofers and 8 ohm tweeters and MR. The crossover is designed in such a way that the net load the amp see's, will be 8 ohms per box.
If you ran a 4 ohm and an 8 ohm wired in parallel, the net result is 2.67 ohms. Am amp can handle that load fine in most cases. However, a HU amp will not like it at all.
Does that help?
Swez
cplkittle on 12/14/2006 02:13:18
you have an 8ohm 3 way wired in parallel with a 4ohm 6.5, then wired in series with a 4x6?
I think that would be 4.67ohms, which would change your crossover point to 234Hz.. not significant.
If they were all parallel it would be 2 ohms.
and ofcourse that would make it 100Hz
ShootuhMcBustaCap on 12/14/2006 16:37:25
Let me reiterate here. The 8-ohm speakers woofers were shot, so I only used the Mid and tweeter. That set is wired in series with the 6.5 4 ohm, and then the series wired speakers just listed are wired in parrelal with the 4x6 4 ohm.
Suprisingly enough, this setup is killer!! So ugly, But it sounds great!!
ShootuhMcBustaCap on 12/14/2006 16:40:05
Also, I'm not asking if this would be functional, as it already is, I'm just curious of what load and crossover point this would present, and how you guys got that calculation. Unless all the speakers are of the same impendance, I don't know formulas for caculation that impendance.
Anyway, thanks again for the help, This rig just has me thinking alot.
ShootuhMcBustaCap on 12/14/2006 16:47:33
Ok The multimeter is now fixed. Now where would and how do I measure the ohms. Sorry guys, I have never used a multimeter before, but I am estatic to have one.
ShootuhMcBustaCap on 12/14/2006 17:07:33
Alright, My multi meter just died again, as i just pulled a battery from somewhere else and put it in the MM. I plugged the test leads into the binding posts on the crossover network on the mid/tweeter, and the reading went from 14-16.5 ohms, averaging about 14.5 overall. I measured on the scope frequency of 200 ohms. I need to get new nine volt batt, and I'll check again
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