Just checking before I blow my amp

[stefBclef]

Hello

I would like to check to see if I can use a certain combination of cabs/amps.

I have read the info on here about impedence etc, and as such I am pretty sure I can't, but I want to be 100% sure before I decline a purchase!

I have an Ashdown Mag 300 210 combo ([url="http://www.ashdownmusic.com/bass/detail.asp?ID=78"]http://www.ashdownmusic.com/bass/detail.asp?ID=78[/url]) which has 2 jack outputs. It can handle a minimum of 4 ohms.

At the moment, into one output is plugged the built in 210 which is 8 ohms.

If I plug something into the other jack which is 4 ohms, does the new overall impedence become:

4 x 8 / 4 + 8 = 2.66.

Like I said, im pretty sure that this is correct, just need confirmation!

Also, this type of wiring is in parallel right?

Thanks
Stef

[geoffbyrne]

I think you are right there, so you need to plug in a cab rated at 8 Ohms - that'll give you the 4 Ohms total load.

G.

[Tankdave]

Your quite right to query this, as your reservations are right, you need an 8ohm extension cab to pair with the 8ohm combo

[Tdw]

You're right about the impedance and yes it would be parallel wiring. You need an 8 ohm cab to use with your combo not a 4 ohm cab.

[stefBclef]

Ok thanks everybody!