Ohms Question

[ODDBALL]

Ok, I have a question!

I have a Bass amplifier that can run @ 2ohms min @500 watts thats with an extension added. Its a combo amp. Can I run a 4ohm cab with an extension cab at 8ohms? Would that be safe for the amp and cabs?

Thanks

Shaun

 

[B-string]

The cabs don't care. If the combo has an internal 4 ohm "load" (speakers) you can hook up a 4 ohm cab or 8 ohm cab not both with the internal speakers or the amp will shut down or be damaged (smoke).

 

[Stick_Player]

Impedance Calculator

 

[ODDBALL]

The combo is 4ohm and the extension cab is 8ohm.

 

[ODDBALL]

The combo itself can run at 2ohms with a extension

 

[Igor Porto]

If the combo supports 2 ohms, assuming the internal speaker is already 4 ohms, you can add one external 4 ohms or one 8 ohm.

 

[RickenBoogie]

Yes, if the combo amp is a 4 ohm 1x15, the "best" match would be another similar 4 ohm 1x15 ext cab. Using an 8 ohm 1x15 ext cab would mean 2/3 of the power goes to the internal 15, and only 1/3 to the ext cab. So, if you want balance, and better sound, use an ext cab just like the internal spkr(s).