Hi I have a Ampeg SVT 450 head and a Ampeg 410 Classic Cab 8 ohm I want to pair it with a Hartke 215 bass cab will this work without a problem
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Hello
- Thread starter David Potter
- Start date
Hartke 215XL : 4 ohms
Ampeg 810 : 8 ohms
Total speaker load : 2.67 ohms
Minimum load for Ampeg SVT 450 : 4 ohms
No, don't do this.
More to the point, why do you need to be so deafening? Either speaker on its own is more than enough.
Ampeg 810 : 8 ohms
Total speaker load : 2.67 ohms
Minimum load for Ampeg SVT 450 : 4 ohms
No, don't do this.
More to the point, why do you need to be so deafening? Either speaker on its own is more than enough.
Right now it is buried in the back of our equipment truck when I find it what is the acceptable ohms on the Hartke cabinet to pair with my Ampeg
You have a 4 ohm minimum on your head. If one is 8 ohms and the other is 4, that's 2.67 ohms, so no go. If both are 4 ohms, that's 2 ohms total and also a no go. If both are 8, then you're OK because that's 4 ohms.
Like Jimmy said, 8 ohms would work. The math is sort of backwards. Two 8 ohm cabs combine for a 4 ohm load. And too FEW ohms is a problem moreso than too many. If the Hartke is a 4 ohm cab you will damage your amp running them both at 2.67 ohms.
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Not reco'd, but if it's a visual thing and you keep a leash on volume and duration, you might could run the cabs in series ...
Ooops, NO! Just realized it's a S/S amp.
Ooops, NO! Just realized it's a S/S amp.
As a Physicist, I take issue with this. The math is not "sort of" backwards. The math is precisely backwards. ;-)
Easiest way to deal with it is to take the inverse of each impedance - in doing that, an 8 Ohm cabinet becomes a .125 mho cabinet, a 4 Ohm cabinet becomes a .25 mho cabinet. You then add these inverses (aka conductances) - .125 mhos plus .25 mhos equals .375 mhos total conductance. You then invert that, and get.....2.66666666 (the 6 repeating ad nasueum) or about 2.67 Ohms as the total load.
(a mho is the unit of conductance (now called a Siemens, but for our purposes the mho is simpler to understand))
That's what I said! Only in English!
Mathematics and Physics are the language of the universe. While you may do better in Earthly pursuits, when the aliens come, I'm better prepared.
So you have a bunch of math stored in a bunker?
I thought all alien tech blows our "laws" of physics out of the water. I gotta go watch more YouTube.
So you have a bunch of math stored in a bunker?
I thought all alien tech blows our "laws" of physics out of the water. I gotta go watch more YouTube.
No bunker. Yes, alien tech (They will have traveled halfway across the Galaxy) will dwarf what an Earth guy with an iphone can do. When the aliens arrive, they'll obviously be hungry, and ultimately eat us all, but for a time, they'll keep some of us around to encourage the others into the soylent...resort, yeah that's it...it's a resort. Those of us that understand Math and Physics will be able to communicate better with them than most, so we'll likely be the last ones to be "dinner guests".
Then again, maybe we're alone. Which would be a huge waste of space. One of the sad things about the universe is that, in the vast majority of places, as there is no air, playing bass guitar will be a fruitless pursuit. No quantity of 10 inch drivers or vacuum tubes can overcome the vacuum of space.
It's possible I have derailed a perfectly good impedance thread. You're welcome.
@David Potter this is kind of what we do here. Your question (I think) has been completely answered. That's usually an all-clear signal for us dipsticks to come along and take your thread off into a direction having nothing to do with your question.
If your question has NOT been completely answered, please accept my apology and follow up with any clarifying questions.
If it HAS been answered, just sit back and enjoy the view.
It's kinda what we do.
The Hartke cab should provide more volume. The speakers are vertically aligned, therefore the cab is a bit taller. The impedance is lower, allowing your amp to put out more power. As far as sensitivity and displacement of air, the two may be a wash. Having more available power and speakers closer to your ears, as well as having them configured vertically should give at very least the perception of more volume. It will also provide better horizontal dispersion of sound. Since you can only use one of the cabs; in times where volume trumps tone, the 2x15 should win. If the 4x10 sounds better to you. elevating it may be a valid choice. It brings the speakers closer to your ears; however, it will only receive approximately 50-60% of the amp's power that the 2x15 will, and the dispersion will not be as effective as the vertically aligned 2x15.
