Is this a safe system setup?

[markw]

As for connecting them up right, I have over 45 years experience as an electronics technician - I believe I can wire things up correctly.

I''ve been in this field for quite a while too. Can you please explain to me how you arrived at that 12 ohm figure in your diagram?

 

[Jose F. Clark]

made a mistake Mark- You never make any?

 

[markw]

made a mistake Mark- You never make any?

Not that publicly, particularly when it was pointed out several times without acknowledgment.

And, you made the same "mistake" in the thread you posted on this several months ago. That does send off warning bells.

 

[3db]

Not that publicly, particularly when it was pointed out several times without acknowledgment.

And, you made the same "mistake" in the thread you posted on this several months ago. That does send off warning bells.

I smell troll .... If he's been in the business for 45 years as claimed, then why is the OP

1. asking us if its OK
2. not realize that wiring speakers in series will smear the phase relationship all to hell.

I'm curious .

 

[3db]

made a mistake Mark- You never make any?

Continuing to ignore consistent advice tells me that you really made up your mind in the first place. Why bother asking us?

 

[j_garcia]

 

[Seth=L]

1. not realize that wiring speakers in series will smear the phase relationship all to hell.

I wasn't aware of that, that's an even bigger reason not to do it.

I'm going to join the "not sure why he's asking us" party.

I get him doing what he wants to do, but I don't get a simple question regarding safety if he has this much experience.

 

[3db]

I wasn't aware of that, that's an even bigger reason not to do it.

I'm going to join the "not sure why he's asking us" party.

I get him doing what he wants to do, but I don't get a simple question regarding safety if he has this much experience.

Kinda reminds me of

 

[slipperybidness]

I wasn't aware of that, that's an even bigger reason not to do it.

I'm going to join the "not sure why he's asking us" party.

I get him doing what he wants to do, but I don't get a simple question regarding safety if he has this much experience.

Voice coils = inductors

Keep on chaining inductors together.......

 

[Seth=L]

Voice coils = inductors

Keep on chaining inductors together.......

Yeah, sorry, my knowledge has limits. I'm not versed on inductors.

 

[slipperybidness]

Yeah, sorry, my knowledge has limits. I'm not versed on inductors.

When you apply a voltage, then the resulting current is either in phase with the voltage, leading the voltage, or lagging the voltage.

For pure resistors, V and I are in phase.

For inductors, V leads I by 90 degrees

For capacitors, I leads V by 90 degrees

 

[Seth=L]

When you apply a voltage, then the resulting current is either in phase with the voltage, leading the voltage, or lagging the voltage.

For pure resistors, V and I are in phase.

For inductors, V leads I by 90 degrees

For capacitors, I leads V by 90 degrees

Oh, that's interesting. I've learned something today... that OP's speakers will be out of phase.

So if I understand correctly, OP likes his speakers out of phase.

 

[lsiberian]

I have over 45 years experience as an electronics technician

I fear for those you tech-ed for. Because an electronics technician shouldn't need advice on how to wire speakers safely.

 

[herbu]

I fear for those you tech-ed for. Because an electronics technician shouldn't need advice on how to wire speakers safely.

You know, in this boy's defense, there are ETs and there are ETs. I remember my first leave after ET school in the Navy. When I got home, Daddy asked me to fix his TV. Not a prayer.

The OP seems intelligent, albeit a bit hardheaded. Understanding phase shift of caps and chokes does not necessarily equate to an understanding of speakers. He may have been very good at what he did, and still have no knowledge of its application to audio.

So Jose, I hope you got your answer. And the next time you ask a question here, you may want to spend a little more time digesting the answer(s).

 

[Jose F. Clark]

T

You know, in this boy's defense, there are ETs and there are ETs. I remember my first leave after ET school in the Navy. When I got home, Daddy asked me to fix his TV. Not a prayer.

Thank you herbu ("As far as possible, without surrender, be on good terms with all persons").

As for you , markw, j.garcia, and 3db:

1970 – 1980: US Navy Fire Control Electronics Technician

1980 – 1988: US Navy Fire Control Electronics Instructor

1988 –1992: PC Introduction, Maintenance, and Repair Instructor

1992 – 1994: Computer Control Maintenance and Repair-Paper Mill processing/manufacture

1994 – 1997: Electric-Drive OHV Maintenance and Repair, Komatsu Large Mining Trucks

1997 – 2015: Caterpillar Advanced Electronics Vehicle Maintenance and Repair Field Technician.

12/31/2015: Retired Caterpillar Employee.

So NO, markw, j.garcia, and 3db, I didn’t do speaker systems anytime during my 45- year career!

What have you done thus far, to brag about in your lives?

"Whatever your labors and aspirations in the noisy confusion of life, keep peace in your soul."

 

[TLS Guy]

T

That is an impressive curriculum vitae. Compared to that list setting up a speaker system is or should be a trivial endeavor. I just hate to ponder your trail of destruction and blown boards along your journey.

After looking at that list your posts make absolutely no sense to me at all. Strange thread this one!

 

[markw]

T

And yet a simple impedance/resistance question was beyond you?

Oh, aside from my teaching myself a bit about this hobby in high school and making afew bucks repairing TV's, my meager formal training in electronics was what the air force (US) taught me before turning me loose maintaining microwave tropo scatter communications systems in southeast Asia between 1968 - 1972. Oh, I also managed a stereo concession in Macy's when I was 18 before that and, after getting mustered out of he AF, I worked on and off in Radio Shack part time over the following decades when I was going to other schools, such as Chubb Institute and the local community college, and sometimes, for the sheer fun of it.

And this tricky DC resistance/impedance was one of the first things they taught us when learning electronics. ...and one of the simplest. I actually knew this before the AF school. I guess you musta dozed off when they covered that. No biggie. It's not like it's really important in this field.

And you claim to have taught electronics? Sorry, I don't buy it.

 

[Seth=L]

As for you , markw, j.garcia, and 3db:

1970 – 1980: US Navy Fire Control Electronics Technician

1980 – 1988: US Navy Fire Control Electronics Instructor

1988 –1992: PC Introduction, Maintenance, and Repair Instructor

1992 – 1994: Computer Control Maintenance and Repair-Paper Mill processing/manufacture

1994 – 1997: Electric-Drive OHV Maintenance and Repair, Komatsu Large Mining Trucks

1997 – 2015: Caterpillar Advanced Electronics Vehicle Maintenance and Repair Field Technician.

12/31/2015: Retired Caterpillar Employee.

So NO, markw, j.garcia, and 3db, I didn’t do speaker systems anytime during my 45- year career!

What have you done thus far, to brag about in your lives?

"Whatever your labors and aspirations in the noisy confusion of life, keep peace in your soul."

I equate this to saying "No offense" or "With all due respect" then following it with a defamatory statement that otherwise nullifies the leading phrase.

Edit: It's beginning to smell a bit like urine in here.

 

[TLS Guy]

When you apply a voltage, then the resulting current is either in phase with the voltage, leading the voltage, or lagging the voltage.

For pure resistors, V and I are in phase.

For inductors, V leads I by 90 degrees

For capacitors, I leads V by 90 degrees

Just to be clear about this, the phase changes are not additive. Now you must only wire identical speakers in series otherwise frequency dependent impedance changes will upset the response of the two drivers.

So if you connect two identical drivers in series the total impedance Le is doubled, the DC resistance is doubled. The T/S parameters do not change significantly except for a trivial increase in Qt. The total phase lag is still 90 degrees and not 180.

Now it is counter intuitive to think that this applies to two complete speaker systems, but the situation still applies as the frequency related impedance changes are the same for each speaker. So the total impedance curve has the same shape except all impedance values are doubled.

Now if the speakers are different, then the frequency response of a series connection obviously really upsets the apple cart.

 

[Jose F. Clark]

I equate this to saying "No offense" or "With all due respect" then following it with a defamatory statement that otherwise nullifies the leading phrase.
Edit: It's beginning to smell a bit like urine in here.

Seth, I did not precede my comments “With due respect” because none was due. I gave thanks to those who helped me, and I appreciate their help ever so very much. I made a simple, ignorant mistake, because of my misunderstanding of the impedance presented by a subwoofer, and those three specifically-mentioned individuals, instead of trying to help me, decided to engage in their smug character assassination routine which, apparently, is so much more important and fun in their life. I’ll admit I let them make me angry, and thus my last reply, in which I became no different than them. For that, I apologize to everyone that was offended, but no, those three do not have my respect at all.