Help with the GK 400RB IV

drewsbass · #1 12-11-2011, 03:03 AM

Anyone know if the Gallien-Kruger 400RB IV has enough power for two cabs? I currently have the GK 410rbh and would like to add the 115rbh, but am unsure if this head has enough juice to make it. Help please?

mazdah · #2 12-11-2011, 03:17 AM

It has more then enough juice if your 410RBH is 8ohm version.

drewsbass · #3 12-11-2011, 07:14 AM

Mine is the 4 ohm. Sorry I'm a bit new to gear specs. But, I'm guessing I can't run my 4 ohm 410 rbh with an 8 ohm cab too. I don't see a 4 ohm 115 rbh available.

wcriley · #4 12-11-2011, 07:23 AM

Your amp "has enough power for two cabs".
BUT...it has a minimum impedance of 4 ohms. So you can only run two cabs if both are 8 ohms.

madmatt · #5 12-11-2011, 07:40 AM

Just use the 410RBH by itself. It would work good.

RickenBoogie · #6 12-11-2011, 08:40 AM

+1 4 ohm MINIMUM load, which you already have. And besides, mixing a 15 with a 410 is NOT advised, no matter what you've seen or heard.

madmatt · #7 12-11-2011, 09:02 AM

Quote:

Originally Posted by drewsbass

Mine is the 4 ohm. Sorry I'm a bit new to gear specs. But, I'm guessing I can't run my 4 ohm 410 rbh with an 8 ohm cab too. I don't see a 4 ohm 115 rbh available.

Running two 4 Ohm cabs together would give you a total impedence of 2 Ohms, which will cause your Amp to overheat.
An 8 Ohm and a 4 Ohm together will put it at about 2.33 Ohms which is still too low.
Two 8 Ohm cabs will put you at 4 Ohms.

drewsbass · #8 12-11-2011, 09:27 AM

Sweet thanks for the info everyone. I will probably just stick with the 410. It is pretty loud and sounds great, just when I play a gig with no PA and guitars are cranked it's hard to compete. The speakers start to fart out a little if I crank it too much and I get scared I'll blow one. I guess I can probably adjust a bit on the low end and get more volume. Thanks for the input.

**B-string** · #9 12-11-2011, 12:22 PM

Nothing more to say here. Buying one 4 ohm cab limits what you can do, you can get more sound out of a second cab (two 8ohm) than maxing the wattage from one.

Jerry Ziarko · #10 12-12-2011, 07:21 AM

Quote:

Originally Posted by RickenBoogie

+1 4 ohm MINIMUM load, which you already have. And besides, mixing a 15 with a 410 is NOT advised, no matter what you've seen or heard.

I used a 400RB with a Harke 4x10 stacked on a Hartke 1x15 back in the 80's. Sorry you didn't hear that rig. It killed!