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Having issues building a rig


PaulyWally

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I need some input to see what you guyses would do.

 

I need cabs, and my main amp is 2 ohm stable. Of course, I'd really like to go to 2 ohms to get max power from the amp. But if I do that, then it'll be really tough (if not impossible) to set up the cabs for 4 ohms (I'd have to go 8). And that'll be a problem when/if I ever use a different amp since most only go as low as 4.

 

Any ideas?

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Whats the wattage of your main head? Maybe just get 2 cabs @ 8 ohms each and run your amp at 4 anyway. Unless you buy four cabs, each rated at 8 ohms, use four cabs with your amp to drive it down to 2 ohms, then if you use a different amp only use two cabs to run at 4 ohms

 

 

Sounds like overkill to me. If the wattage is high, run it to 4 ohms and get a 4x10, 2x12, 6x10 or 8x10. Thats what I reckon anyway. Why use 2 ohms if you don't need to and it just causes you more headache? Cos remember the delicate balance between wattage and speaker area, if its volume you're after maybe you don't have to run it that hot

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I think that using 2 OHM cabs is putting an unnecessiary load on the amp even if it is rated to handle 2 ohm loads

if you are so dead set on using 2 OHM why not just bridge 2 4OHM, cabs this is much more versatile and Practical than having 2 OHM cabs.

JM .02

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Get a 4 ohm 410 and a 4 ohm 212 or 115.

That way you can run both "big" cabs with one amp when you need two, or have enough juice to run one solo @ 4 ohms.


:thu:

 

Yup, basically my thinking :)

 

I was thinkin of MacGarnicle at the time, who has two 2x12 Neo cabs @ 4 ohms. Runs one at practice, runs two at gigs (sure you won't mind me using you as an example bud :p)

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Yup, basically my thinking
:)

I was thinkin of MacGarnicle at the time, who has two 2x12 Neo cabs @ 4 ohms. Runs one at practice, runs two at gigs (sure you won't mind me using you as an example bud
:p
)

 

Ah, the portable 412. I assume that will not suck. ;)

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At 2 ohms it's 1200 watts.

At 4 ohms it's 700 watts (or something like that).

 

I know... 700 watts is a lot. I just keep thinking, if I can run 1200 watts and get the headroom, why not?

 

I wanted to keep the cabs relatively portable... especially since I don't have a big car.

 

One of my ideas was to get a smaller 8 ohm cab (like a 210), and a larger 4 ohm cab (like a 212). I can run the 210 for smaller gigs, the 212 for medium-sized gigs, and run them both at 2.67 ohms for the larger gigs.

 

The one downside to that is, if I want to run them both with a 4 ohm head, I'll have to run them in series at 12 ohms. :freak:

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One of my ideas was to get a smaller 8 ohm cab (like a 210), and a larger 4 ohm cab (like a 212). I can run the 210 for smaller gigs, the 212 for medium-sized gigs, and run them both at 2.67 ohms for the larger gigs.

 

 

 

Not good. You're going to run into balance problems that way. When you run the 8ohm and 4ohm cabs together the 4ohm cab will get most of the power and be a lot louder than the 8ohm cab.

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I'd go with two 8ohm cabs. I went with two 4ohm cabs and there are times when I regret the choice. It really does limit the versitility of your setup and what amps you can use. 700 watts is a {censored}load of power and I don't imagine you'll run into very many situations where it's not enough. Besides, just because an amp can run a 2ohms doesn't mean you should. If you have to run an amp at 2ohms to get the power you need, you really need a bigger amp.

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What amp are you running anyways, or did I miss that?

 

 

It's a Kustom Groove 1200. Not a great amp, but I got it cheap, it works, and I actually like the tone. Eventually, it's going to be a backup amp... which is why I'm so worried about a setup that'll do 4 ohms easily.

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Very true. I can see how limiting it will be just by thinking about it. And running the amp at 4 ohms would probably increase it's life anyway.




It's a Kustom Groove 1200. Not a great amp, but I got it cheap, it works, and I actually like the tone. Eventually, it's going to be a backup amp... which is why I'm so worried about a setup that'll do 4 ohms easily.

 

 

Ahh, gotcha.

In that case, go for the 2x 8 ohms then if you're not dead set on the amp. Not many do 2 ohms well.

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It's a Kustom Groove 1200. Not a great amp, but I got it cheap, it works, and I actually like the tone. Eventually, it's going to be a backup amp... which is why I'm so worried about a setup that'll do 4 ohms easily.

 

My suggestion:

 

DON'T build a speaker system around that head's advertised specs.

 

8 Ohm cabs are the "standard" and will get maximum value on resale.

 

The "headroom" you will gain by running 4 vs. 8 Ohms is nearly inaudible.

 

That is the advice I got from hasbeen and agedhorse when buying the first cabinet for my GBE 600.

 

I went with a used, 8 Ohm Avatar 410 Delta that I traded in for exactly what I paid.

 

Now I now run the Genz Benz 212T Neox (4 Ohm), and I don't anticipate EVER needing another cabinet.

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My GenzBenz was designed to run at 2 ohms all day long. It's one of the many reasons that I bought it over other brands.

 

Yup. Of course the only way I was only able to rig up a two ohm load was to simultaneously run it to my 212, 412, 410 and 115 all eight ohm cabs. Words fail to describe the evil sound that could generate.:evil:

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Yup. Of course the only way I was only able to rig up a two ohm load was to simultaneously run it to my 212, 412, 410 and 115 all eight ohm cabs. Words fail to describe the evil sound that could generate.
:evil:

 

While I'm sure you had fun doing that, when would you ever need to?

 

You had me pressed to the wall at your gig and you were only running two of those cabs.

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While I'm sure you had fun doing that, when would you ever need to?


You had me pressed to the wall at your gig and you were only running two of those cabs.

 

Of course not, but I had to try just to see. Besides I don't think the apartment neighbors minded too much, and the structural damage was really only minor..:D

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An amp designed specifically to operate all day at 2 ohms will suffer no ill effect being operated at 2 ohms. It will not shorten it's life, nor is it a bad idea. As Thunderbroom mentioned, the Genz Benz GBE-600, 750 and 1200 are all designed to operate all day long at 2 ohms and hardly break a sweat doing so. You have my word on it, I designed the power amps and they are based on touring pro audio principles.

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