#1
what happens if you dont match the ohms with a head and cab?? i cant seem to find any 1x12 cabs that are 4ohms, any advice?
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#2
Amp ohms higher than speaker ohms = burnt out amp after a long enough time.

Amp ohms lower than speaker ohms = not as efficient or loud, but works.
Hi, I'm Peter
#4
so theres nothing wrong with running a 4 ohms head into say a 16ohms cab?? cuz im searching and i cant find any 1x12 cabs that are 4 ohms
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#5
why a 1x12 cab tho?

and what kind of amp do you have?
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#6
well rite now im using a traynor ycv40t, which in the spring/summer (when ever i have time) will convert to just a head and get a 1x12 cab, i was thinking a 2x12 but i figured a 1x12 cab would be much easier to move around
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Epiphone Les Paul Custom (Alpine White) (retired)
Gibson Les Paul Swamp Ash studio
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Squier Vintage Modified Jazz
#8
^^if you convert it to a head and another cab, that's 2x harder to move around.

put some casters on the bottom. and i would assume ur amp has another jack to plug in an 8ohm speaker, or a switch to switch output impedance.


how many speaker(s) does the amp have right now?
Call me "Shot".

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#10
^knew it.


the blues jr is already heavy for me. since i stopped working out completely since august of last year hahahaha. so carrying my marshall is like insane heaviness.
Call me "Shot".

ShotRod Guitar Works

Custom Hand-wired Amplifiers and Effect Pedals.

Est. 2007


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#12
^holy ****. i used to bench 20lbs + the bar when i swam in high school.
Call me "Shot".

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Est. 2007


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#13
which jack is that?? i kno that there are 2 jacks for speakers are both 4 ohms? or what?
Guitars
Epiphone Les Paul Custom (Alpine White) (retired)
Gibson Les Paul Swamp Ash studio
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#16
Quote by nehe-miah
which jack is that?? i kno that there are 2 jacks for speakers are both 4 ohms? or what?

There's a jack inside the amp for an 8 ohm cab. I'll have to take a look to check on the 10" speakers...but I think those ones are 16 ohm ones wired in parallel for 8 ohms. So when you plug in the 8 ohm cab, it wires the speaker configs in parallel for 4 ohms? I think.....Mines in my car. Don't feel like taking it out in the middle of the night.
#17
so....can i use a 16ohms or even 8 ohms cab???
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Epiphone Les Paul Custom (Alpine White) (retired)
Gibson Les Paul Swamp Ash studio
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#19
oh....so i cant just use a cab? i would have to use the 2x10 speakers?
Guitars
Epiphone Les Paul Custom (Alpine White) (retired)
Gibson Les Paul Swamp Ash studio
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#21
ok that would be great! so when im looking for a cab what ohms should i look for? because on the traynor site it says that its a 4 ohms amp
Guitars
Epiphone Les Paul Custom (Alpine White) (retired)
Gibson Les Paul Swamp Ash studio
Gibson Les Paul Standard Faded (Tobacco Burst)

Bass
Squier Vintage Modified Jazz
#23
oh thanks alot! so i can start looking for 8 ohms cabs XD
Guitars
Epiphone Les Paul Custom (Alpine White) (retired)
Gibson Les Paul Swamp Ash studio
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Squier Vintage Modified Jazz
#24
what about new 10" speakers so u can swap them out?
Call me "Shot".

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#25
Quote by stephen_rettie
it will explode and kill everyone you care about...



HAHAHA Jesus Christ man, that's the funniest sh!t I've heard all day
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#26
I don't think ohms get divided like Wattage does man. Better really think about that....

I KNOW that 4 25 watt speakers can be powered by a 100 watt head, but ohms... I'm under the understanding that you have to be AT the ohm value no matter how many speakers you have......or at the very least be under
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#28
Wattage characteristics I am certain about. Ohms I have always live by the rule of "match". But amp speakers aren't typically wired in parallel, and I kinda believe that there's a reason for that.

And secondly, I could say I had just wired a cabinet too....
I'm just saying that if it was coming down to my gear.........I'd be careful with what I took in from an internet forum as "Good Advice"
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Last edited by Reildeal at Feb 8, 2008,
#29
^Happens all the time. 4x12 cabs usually have one of two configurations:
two pairs of this: 16 ohm wired in parallel with a 16 ohm for 8 ohms. Each pair is then wired in series to bring it back to 16 ohms.

OR...

two pairs of: 16 ohm wired in parallel with a 16 ohm. Each pair is wired in parallel to bring the cab's impedance to 4 ohms.

Trust me, that's how it works. It's about what the amp can take. If the amp can take 4 ohm and 16 ohm configs, you wire the speakers around that.

If it can only take 8 ohm configs, you wire the speakers around that requirement.
#30
u can have one 16 ohm and two 8 ohm speakers. 8 ohms are series with themselves, and those two and the 16 ohm speaker are in parallel relations.

that will give 8 ohms input impedance.

so basically,
series: add impedances/resistances.
parallel: multiply impedances/resistances AND divide that by the sum of both.


Trust me. I'm an EE major in college.
Call me "Shot".

ShotRod Guitar Works

Custom Hand-wired Amplifiers and Effect Pedals.

Est. 2007


Source to everything I say about Guitars, Pedals, and Amplifiers: I make them.


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#31
Quote by forsaknazrael
^Happens all the time. 4x12 cabs usually have one of two configurations:
two pairs of this: 16 ohm wired in parallel with a 16 ohm for 8 ohms. Each pair is then wired in series to bring it back to 16 ohms.

OR...

two pairs of: 16 ohm wired in parallel with a 16 ohm. Each pair is wired in parallel to bring the cab's impedance to 4 ohms.

Trust me, that's how it works. It's about what the amp can take. If the amp can take 4 ohm and 16 ohm configs, you wire the speakers around that.

If it can only take 8 ohm configs, you wire the speakers around that requirement.


Hey man, I dig. It sounds like you know more than me when it comes to this, I'm just careful I guess.... I like to know things on hard certainty. Just saying if it was my gear I'd get a lot of opinions where a screen name wasn't all I knew of the person..

But that's just me, and you're probably right
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#33
I'll take your word for it man.

And I digress all together... I just remembered my speakers were in series too...

egh I've been drinkin tonight....... cheers bro
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#34
Hm. Well. Seems the Traynor's 2x10 speaker config is 4 ohms, and the cab it needs it also 4 ohms.

Well, that's pretty lame for me, hahaha. I built my cab as an 8 ohm one. Well, it still works, just not as well as a 4 ohm one. I have some ideas, too...to fix this. Mang..Coulda sworn it was an 8 ohm cab extension.
#35
Quote by nehe-miah
so theres nothing wrong with running a 4 ohms head into say a 16ohms cab?? cuz im searching and i cant find any 1x12 cabs that are 4 ohms

I wouldn't continually run a 16ohm cab on a 4ohm amp impedance setting. Even though it's the safer direction of mismatches, mismatching 2 steps like that, you can run into flyback voltage which can damage your output transformer.
"The fool doth think he is wise, but the wiseman knows himself to be a fool." - W.S.
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#36
so when im looking for a cab i should be looking for a 4ohms cab?
Guitars
Epiphone Les Paul Custom (Alpine White) (retired)
Gibson Les Paul Swamp Ash studio
Gibson Les Paul Standard Faded (Tobacco Burst)

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Squier Vintage Modified Jazz
#37
Quote by nehe-miah
so when im looking for a cab i should be looking for a 4ohms cab?


I guess so! Problem is, you won't likely find any 1x12's at 4 ohms. Speakers generally come in either 8 or 16 ohm sizes. You'll need two 8 ohm speakers in parallel for a 4 ohm load.

An 8 ohm cab would work, it just wouldn't be optimal.
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