GBE 600 - Speaker Outputs

[ZubenElGenubi]

I've gone through several searches here and haven't found an answer. Jeff (Genzler) is on vacation, so I'm hoping the TBer's can help.

I have a GenzBenz GBE-600 and it has two (2) Speakon outputs AND two (2) ¼" outputs.

What would happen if I connected three cabinets? I have two 4-ohm cabs (Yamaha BBT210s and Yamaha BBT410s) and one 8-ohm cab (Behringer BB115).

I haven't tried it yet, just curious.

BTW, the GBE-600 is rated at 625W into 2 ohms. The manual doesn't say anything about connecting cabinets...except what the connections are.

[fishtx]

This is some basic stuff, so I hope your question is legit...a 2 ohm load is equal to two 4 ohm cabs (or four 8 ohm cabs)...Pretty sure the GBE600 will handle a 2ohm load (or two 4ohm cabs), but do not try combine two 4ohm cabs and an 8ohm cab...that will take the ohm load to below 2 ohms...you don't want to go there...

[KsPiNeSh]

Originally Posted by ZubenElGenubi

I've gone through several searches here and haven't found an answer. Jeff (Genzler) is on vacation, so I'm hoping the TBer's can help.

I have a GenzBenz GBE-600 and it has two (2) Speakon outputs AND two (2) ¼" outputs.

What would happen if I connected three cabinets? I have two 4-ohm cabs (Yamaha BBT210s and Yamaha BBT410s) and one 8-ohm cab (Behringer BB115).

I haven't tried it yet, just curious.

BTW, the GBE-600 is rated at 625W into 2 ohms. The manual doesn't say anything about connecting cabinets...except what the connections are.

The number of speaker has absolutely zero to do with the number of cabs that can be run by the head - that si determined by cab resistance.

Originally Posted by fishtx

This is some basic stuff, so I hope your question is legit...a 2 ohm load is equal to two 4 ohm cabs (or four 8 ohm cabs)...Pretty sure the GBE600 will handle a 2ohm load (or two 4ohm cabs), but do not try combine two 4ohm cabs and an 8ohm cab...that will take the ohm load to below 2 ohms...you don't want to go there...

Agree.

[aproud1]

Pretty well covered. If you have two 4 ohm cabs hooked up don't connect anymore cabs regardless of their specs.

Killer head. Love mine. It'll run a 2 ohm load all night without a problem. Don't forget to switch the fan to high if you're going to push it all night though.

[ZubenElGenubi]

Yes; definitely a legitimate question! I understand Ohm's Law and certainly how it applies with amps.

I was basically wondering how the amp handles the outputs to the four connectors. Maybe they're switched so that the Speakon takes precedence over the ¼" outputs. If I saw a schematic (or took it apart myself), I would know right away.

Right now, I've only run either the two Yamaha cabs (both ¼" input, BTW) or one Yamaha cab and the Behringer (one ¼" and one Speakon). That Yamaha/Behringer configuration works out to 2 2/3 ohms.

[ZubenElGenubi]

Just in case anyone's curious, see the photo from a TB sale here back in December (last photo in listing). You can see the four outputs.

FS/FT Genz Benz GBE 600 -TUBE/FET- 625 Watts

[Bass_Pounder]

It does not matter HOW many outputs there are, they are all active and connected in parallel.

Do not connect all 3 of your cabs !

[mambo4]

My amp!
from the manual:
"Minimum recommended total load impedance is 2 ohms provided adequate ventilation for the heatsink area is provided."

[BassmanPaul]

Why would you even want to connect a Behringer cabinet to a GB amp? Not knocking the Behringer (they have their place) but it would be like towing a trailer with a Rolls Royce Silver Cloud!

[ZubenElGenubi]

Originally Posted by BassmanPaul

Why would you even want to connect a Behringer cabinet to a GB amp? Not knocking the Behringer (they have their place) but it would be like towing a trailer with a Rolls Royce Silver Cloud!

Pretty good analogy. But surprisingly, this Behringer cabinet has defied the brand. I got the cab as part of a package with the amp. I replaced the tweeter and have been pretty happy with it. Not the best speaker efficiency, but not muddy (or hissy either).

That aside, I was just curious how the outputs would work with more than two cabs. Sounds like there is no switching/precedence and that I just must never connect more than two cabs. No problem; I'm really happy with the two Yamahas.

[murphy]

If you wired the two 4ohm cabs in series = 8ohms
Plugged that into the output
Plug the other 8ohm cab into the other
You'd get a 4ohm load on the amplifier

[ZubenElGenubi]

Originally Posted by murphy

If you wired the two 4ohm cabs in series = 8ohms
Plugged that into the output
Plug the other 8ohm cab into the other
You'd get a 4ohm load on the amplifier

I can't; the cabs only have a single input each. But if I could re-wire and run them as you described, I'd get only 425 watts into 4 ohms. I can get 625 watts into 2 ohms with this amp. Or with one Yamaha/Behringer config, probably about 550 watts.

Yeah....sticking with the Yamaha cabs seems the best way to go.

[keyboardguy]

For future reference (From Carvin)

SPEAKER COMBINATIONS and OHMS ( Ω ):

Four x 8Ω cabinets = 2Ω
Three x 8Ω = 2.66Ω
Two x 8Ω = 4Ω
Two x 4Ω = 2Ω
One 8Ω and One 4Ω cabinet = 2.66Ω
Two 8Ω and One 4Ω = 2Ω
One 2.66Ω and One 8Ω = 2Ω
Two x 2Ω = 1Ω
Three x 4Ω = 1.33Ω
Two x 4Ω and One 8Ω = 1.6Ω
One 2.66Ω and One 4Ω = 1.6Ω

Mike

[agedhorse]

The GBE 600 is rated at 2 ohms minimum load. The output jacks are in parallel, 2 x 4 ohm speakers is the limit

[wcriley]

Originally Posted by ZubenElGenubi

I can't; the cabs only have a single input each. But if I could re-wire and run them as you described, I'd get only 425 watts into 4 ohms. I can get 625 watts into 2 ohms with this amp. Or with one Yamaha/Behringer config, probably about 550 watts.

Barely audible difference.

[robertusf]

You'd be really sad if you cooked that amp!