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# I need help from some really smart electronics people (1 Viewer)

#### Earl Simpson

##### Supporting Actor
I have 10 books laying on the floor and I can not find my speaker ohm calculation formulas for calculating ohms in series and parallel with speakers of different ohms . Help!!! Never mind, I found it. I can't read. What's new????//
Hey! I noticed 78 people read this post. That means we should have 78 posts on the boot camp thread.

#### Stephen Houdek

##### Second Unit
Resistance in series is additive. In parallel it is done per branch of parallel resistance.

IE: in a simple two branch parallel resistive circuit:

Rt= 1/(1/R1)+(1/R2)

Hope this helps.

#### Stephen Houdek

##### Second Unit
Just thought of a better example. Lets say you wire a total of five 8 ohm speakers in parallel.....Your total resistance is going to be 1.6 ohms assuming my late night math skills are up to par.

No genius involed with this..........This is the most basic of basic.

#### Earl Simpson

##### Supporting Actor
Hey, Stephen, Go to the basics thread and do a post. We need you!!!!!!!

#### Earl Simpson

##### Supporting Actor
We need a post in the basics thread on magna planner speakers. How they are designed and how they work!!!

#### Sankar

##### Second Unit
Stephen has aptly described the relationships. Resistance in series is additive:

Rt = R1 + R2 + R3 + ....

If they are in parallel, you just take the reciprocals

(1/Rt) = (1/R1) + (1/R2) + (1/R3) + ....

Hence, in his example of five 8 ohms speakers in parallel:

(1/Rt) = 5 * (1/8) = 5/8 => Rt = 8/5 = 1.6 ohms

#### Earl Simpson

##### Supporting Actor

Go check out my post on speakers and OHMS with links.

#### DaveF

Moderator
Senior HTF Member
I have 10 books laying on the floor...
What sort of books are they? Any general physics are intro electronics book should have this information (which was given above).

#### Earl Simpson

##### Supporting Actor
Dave, Your as bad as me! I added to the post, that I was blind in one eye and couldn't see out of the other. I found it when I turned the page. It is on my post of links at the basic info thread in the pull down menu up top. Thanks guys!!!!

#### Earl Simpson

##### Supporting Actor
Thanks again! These have been added to my contribution in the basics area, which is in its infancy on my part. Maybe my post will evolve into something more substantial.

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