# Rewiring amps to lower impedance

Discussion in 'Amps and Cabs [BG]' started by jazzbo, Nov 1, 2000.

1. ### jazzbo

Aug 25, 2000
San Francisco, CA
Can I change a 410 cab from 8 ohms to 4 ohms by having it rewired. If so, is this expensive? Where can I have it done? Is it safe? Does it negate the manufacturer's warranty?

2. ### Nate Dawg

Apr 8, 2000
Denver, CO
I don't think it is possible... I was trying to figure it out last night on my cab and the closest ohmage I could come up with is 2 ohms when running all 4 speakers in parallel. I know my head isn't stable at 2 ohms.

Is it possible to wire a 2 ohm resistor in series with the speakers to produce 4 ohms. If so, what size/rating resistor would be needed?

3. ### W.J.

Oct 31, 2000
If your speakers are 2 ohms : 2 in serie ( 2 speakers passive) = 4 ohm
If your speakers are 4 ohms : 2x2 in serie then you put these into parallel = 4 ohms
If your speakers are 8 ohms : 2 in parallel = 4 ohms
If your speakers are 16 ohms : 4 in parallel = 4 ohms
But you must be carefull for your Watts : if you put 2 speakers in parallel ex. both 300W you'll get 150 W
so you must keep an eye on your amps output
I hope thats clear; otherwise give me an é-mail .

4. ### throbbinnut

Actually, if you have (2) 300 Watt speakers, and you parallel or series them, the result is rated at 600 Watts, not just 150 Watts.

Chris

5. ### W.J.

Oct 31, 2000
Yes of course, thank you for the correction.

6. ### I.'.I.'.NakoaGuest

Aug 10, 2000
Fort Worth.
in my cab theres 4 speakers, and alot of wires hooking em up.. its 8 ohms.. but i wanna get soemtinbg done where i can use all 350 watts for my new amp instead of just 250.. but i cant afford another 8 ohm cab.. and i LOVE the sound of the one i ahve now. and cannott find another like it.