amps, ohms?

Pkomor

i couldnt see a general section, so i thought id post here...

I have a hartke 2500 250 watt head with a 15 inch vx 115 cab, I am close to buying a 4x10 vx 10 off ebay, but I confused as apparently the cab is 8 ohms, I dont know what effect this will have on my amp, can you help?! :oops:

ddoogie

You will have to run your amp at 180watt instead of 250.

Shadowduck

8 ohms is the impedance of the speaker in the cab. According to this website your head will deliver 250 watts into 4 ohms or 180 watts into 8 ohms.

So an 8 ohm speaker won't be as loud as a 4 ohm, though presumably it'll give a different tone quality which you may prefer. 8)

Pkomor

But if I run both cabs, (which are both 8 ohms) it should deliver 250 watts, yeah?
because i thought it was the ohms of one cab divided by the number of cabs? (if both cabs have the same ohm rating)

Shadowduck

If you connect two 8 ohm speakers to the same amp* output (in parallel), you should get 250W split between them.

Why does "This Is Spinal Tap" come to mind..?

*Edit: That's "amp-lifier" not "amp-erage".

Pkomor

hehe, great, thats what i was after!

Shadowduck

Glad to be of service.