#1

I don't know what it is, but no matter how much I read up on it I'm never sure I fully understand impedence. Here goes...

I recently bought a peavey valveking head. It's got switchable impedence settings (16 ohm, 8 ohm, and 4 ohm) with two output jacks. I'm using it with my Mesa 4x12 loaded with V30's. It has 4 jacks; one 8 ohm mono input, 2 x 4 ohm stereo inputs, and an output jack. These are my questions;

1.) If I'm only outputting my head using one cable (only utilizing one of the two output jacks on the head) into my cab's 8ohm mono jack, do I use the 8 ohm setting on the head?

2.) If I'm using both jacks to output my head using 2 cables into my cab's 2 x 4ohm stereo jacks, do I use the 4 ohm setting on the head?

3.) (not as important of a question, very obscure but more out of curiosity than necessity as those above are) If for some weird reason I wanted to use the output on my cabinet to daisy chain the signal, what kind of ohm setting shoudl I use on my head?

Thanks a lot guys you're always really helpful with this kind of thing

I recently bought a peavey valveking head. It's got switchable impedence settings (16 ohm, 8 ohm, and 4 ohm) with two output jacks. I'm using it with my Mesa 4x12 loaded with V30's. It has 4 jacks; one 8 ohm mono input, 2 x 4 ohm stereo inputs, and an output jack. These are my questions;

1.) If I'm only outputting my head using one cable (only utilizing one of the two output jacks on the head) into my cab's 8ohm mono jack, do I use the 8 ohm setting on the head?

2.) If I'm using both jacks to output my head using 2 cables into my cab's 2 x 4ohm stereo jacks, do I use the 4 ohm setting on the head?

3.) (not as important of a question, very obscure but more out of curiosity than necessity as those above are) If for some weird reason I wanted to use the output on my cabinet to daisy chain the signal, what kind of ohm setting shoudl I use on my head?

Thanks a lot guys you're always really helpful with this kind of thing

#2

Help?

#3

I can tell you that number one is correct. Number two I believe you need the two jacks together to have a 4 ohm impedance which is different. Three is the same as two I think; you need the two daisy chained cabinets to have a the appropriate total impedance.

I'm not positive about any but number one, but hopefully someone will straighten me out if necessary.

Also, for whoever does come help, I have an old Fender head with a 4 ohm speaker out, then an extension speaker out as well. If I were to run two cabs of these the total impedance would need to be 4, and not necessarily just both 4 ohm cabs... Right?

I'm not positive about any but number one, but hopefully someone will straighten me out if necessary.

Also, for whoever does come help, I have an old Fender head with a 4 ohm speaker out, then an extension speaker out as well. If I were to run two cabs of these the total impedance would need to be 4, and not necessarily just both 4 ohm cabs... Right?

*Last edited by tubetime86 at Nov 15, 2009,*

#4

I figured number 1 would be right, but number 2 I'm not sure if I should go 4 ohms or 2ohms, because if we're doing an input into 2 4 ohm stereos, it seems like the amp would be trying to output a 2 ohm load? Or would it be 4 ohms because each output is going to an individual 4 ohm input?

#5

I figured number 1 would be right, but number 2 I'm not sure if I should go 4 ohms or 2ohms, because if we're doing an input into 2 4 ohm stereos, it seems like the amp would be trying to output a 2 ohm load? Or would it be 4 ohms because each output is going to an individual 4 ohm input?

I just read up a bit and apparently it depends on how the two outputs on the head are wired. If they are in parallel then 2 4 ohm outputs would need a load of 2 ohms. I'm not sure about it if the jacks are wired in series.

#6

It's paralleled. But I don't know if I'm making clear what I'm trying to say. Here's a diagram

Each O is either an output or input. So, in this case, with paralleled outputs, and the inputs for the cab being 4 ohms, do I set my head to 4 ohms?

Each O is either an output or input. So, in this case, with paralleled outputs, and the inputs for the cab being 4 ohms, do I set my head to 4 ohms?

*Last edited by )Eric(Draven at Nov 15, 2009,*

#7

It's paralleled. But I don't know if I'm making clear what I'm trying to say. Here's a diagram

Each O is either an output or input. So, in this case, with paralleled outputs, and the inputs for the cab being 4 ohms, do I set my head to 4 ohms?

I mean the internal wiring on the head. I don't know much about this, but apparently the jacks can be wired as parallel or series. If they are parallel you would set it to 8 ohms for 4 ohms.

All of this is based on about 10 minutes of research just now, so try to do the same to confirm.

#8

I don't know what it is, but no matter how much I read up on it I'm never sure I fully understand impedence. Here goes...

I recently bought a peavey valveking head. It's got switchable impedence settings (16 ohm, 8 ohm, and 4 ohm) with two output jacks. I'm using it with my Mesa 4x12 loaded with V30's. It has 4 jacks; one 8 ohm mono input, 2 x 4 ohm stereo inputs, and an output jack. These are my questions;

1.) If I'm only outputting my head using one cable (only utilizing one of the two output jacks on the head) into my cab's 8ohm mono jack, do I use the 8 ohm setting on the head?2.) If I'm using both jacks to output my head using 2 cables into my cab's 2 x 4ohm stereo jacks, do I use the 4 ohm setting on the head?

3.) (not as important of a question, very obscure but more out of curiosity than necessity as those above are) If for some weird reason I wanted to use the output on my cabinet to daisy chain the signal, what kind of ohm setting shoudl I use on my head?

Thanks a lot guys you're always really helpful with this kind of thing

I'm thinking that each of your 4 ohm outs in stereo go to either 2 - 4 ohm jacks on your cab or 1 - 8 ohm jack on your cab. The cab is wired Series/Parallel I'm sure and the 2 - 4 ohms jacks are connect in series for 8 total.

If you run in series, you simply add everything up. If these are guitar cabs you generally want to be at either 4, 8 , or 16 so two sixteen ohm cabs in series would not work well (32 total)