Question about ohms and Webb

Dave Zirbel · Post by **Dave Zirbel** » 15 May 2001 7:53 pm

On the back of the Webb I have two speaker jacks. It says 2-4-8. I'm assuming that means I can run any combination of speakers as long as it is a 2,4, or 8 ohm load. If you run a 4 ohm speaker with an 8 ohm speaker, is that 6 ohms, and does it hurt the amp?
I plugged in an 8 ohm EVM 12L along with the 4 ohm JBL E-130.It sounded great and darn near blew the roof off. The EVM by itself was almost as loud as the JBL.

Thanks Dave

Blake Hawkins · Post by **Blake Hawkins** » 15 May 2001 9:06 pm

The impedence of a 4 ohm and an 8 ohm speaker in parallel is 2.67 ohms.

Z= (Z1 X Z2) divided by (Z1 + Z2)

Z= (8 X 4) divided by (8 + 4)

Z= 32/12= 2.67 Ohms

Blake

Jay Ganz · Post by **Jay Ganz** » 16 May 2001 6:37 am

Dave,
You're fairly safe with a 4 & 8 ohm
combination. It's 4 & 4 that would really
put a strain on the amp. I've got
EVM-15L's in both of mine & you're right,
they are incredible speakers! They actually
have more low end punch than the JBL E-130.
The highs are the same, but the EV's
don't have that harsh upper midrange thing
the JBL's are noted for.

Bobby Lee · Post by **Bobby Lee** » 16 May 2001 8:05 am

The Webb is designed to use two 4 ohm JBL's safely (2 ohm load). Webb made matching extension cabinets to hold the second speaker. The configuration boosts the output from 225 watts to 300 watts RMS.

Scott Truax · Post by **Scott Truax** » 16 May 2001 4:45 pm

Bobby,

I recently bought the matching extension speaker cabinet for my Webb from Jimmy.
And, the sound from that system is absolutely
scary!

He doesn't give them away, but, they're
worth every penny to me.
Scott Truax