Impedance Question - different (Ohm) speakers in Diezel 212?

[eddiespaghetty]

Hi,

I am using a Diezel 212 cab wit an 50 Watt Einstein.

1.Is it possible to run a 16 Ohm and a 8 Ohm speaker together (parallel)? Or is this not
advisable at all?
I would have to use the 4 Ohm speaker output, I guess. Is the 8 Ohm possible as well?

2. What would be the differences (soundwise), If I run two 16 Ohm speakers at 8 Ohm output
compared to the same speakers with 8 Ohm each on the 4 Ohm output?

Would be a help for me, if you could share your experience.

Best wishes

ed

 

[PaulyPanacea]

i dont think that is a good idea. I always match the OHMS loads on speakers.

 

[Ventura]

I know you can make the load greater in impedance than the source, so you could have your amp running 4 ohms out into an 8 ohm cab, but it's not efficient. AND might I add, it's not meant to be like this so there's probably good reason for it, ahem...

As to your second question, if indeed you're running 2 speakers 'parallel', then you divide the impedance by 2 - therefore, 2 x 16 ohm speakers in parallel are seen as an 8 ohm load to your source, and therefore should be run at 8 ohm. 2 x 8 ohm speakers in parallel would appear as a total of 4 ohms, and should be run at 4 ohms.

I'm a big fan of the efficiency of parallel wired speakers, but you don't typically find this in 2x12 cabs. You'll usually find 2 speakers running in series in 2x12 cabs. Wattages are added, impedance is static.

Cheers,
V.

 

[eddiespaghetty]

Hi,
and thanks for you answers. I undestand the parallel wired impedance (dividing it). But what is the difference soundwise? Does it sound different, when I have two speakers in series vs. parallel?

And does it sound different, when I run two, say, V30s 16, Ohm (at 8 Ohm source) or two V30s 8 Ohm (at 4 Ohm source)?

Greetings

 

[Ventura]

There's a serious mathematical riddle (Thevenin's Theory) that basically states an in-series set of 2+ speakers will be driven at less efficiency than 2+ speakers in parallel. How this translates to sound though? I can't say for certain - as most of the top-shelf boutique 2x12's are still wired in series, and all the pros don't seem to fuss over the sonic differences.

I was told I was being over-analytical when I got into this on another speaker forum. I ended my thoughts on the fact that, ya, I was... If it sounds good - just give 'er.

V.

 

[eddiespaghetty]

Thanks for your reply. Well, i don't think, it is over-analytical, but maybe it is not so important. I only have 16 Ohm speakers, maybe I will try it out when I have two 8 ohm speakers.

Best

ed

 

[Ventura]

Thanks for your reply. Well, i don't think, it is over-analytical, but maybe it is not so important. I only have 16 Ohm speakers, maybe I will try it out when I have two 8 ohm speakers.

Best

ed

Well, if you only have 16 ohm speakers, then definitely parallel wire them into a 2x12 format and for sure, you'll be smokin' hot just dandy. 2x16 ohm in parallel means the load will be 8ohm. No problems. PM me if you need further clarification.

Peace,
V.