GK biamp...what am I doing wrong here?

j_nition · #1 11-16-2011, 10:47 AM

So I have a GK Neo 212II cab and a 700rbII that I just picked up from a TB'r here...

The woofer control acts as a master voume for woofs and tweets when in Fullrange mode on the cab, but when I switch over to biamp, the tweet cuts out and I only get the woof signal....Tweet control does nothing in biamp mode.

I am using a GK 4 conductor speakon cable.

Any ideas? is it possible the amp for the tweet is on the fritz?

StongBass · #2 11-16-2011, 11:00 AM

Bi-Amp implies that two power amps are running two different cabinets (usually - there are some cabinets that have Hi and low speaker inputs). Sounds like your "tweet" output is not going to an actual cabinet? If you are only using one cabinet, then you should be running in full range mode.

will33 · #3 11-16-2011, 11:08 AM

That one is the little 50 watt tweeter amp thing. Check the wire connections at both ends of the cable. Make sure everything's hooked up right. Possible the tweeter or bulb fuse is blown. Set amp to full range and use a regular cable, make sure the tweeter works that way. Connect the high amp out to a different, known to be good, speaker, make sure the high amp works.....check fuses.....

j_nition · #4 11-16-2011, 06:22 PM

mmmm... this is the GK biamp thing that the rb's do. It's a propietary system that can only be activated with a GK cab through the GK 4 conductor speakon cable. As far as I know, there is no seperate "high out" or seperate fuses.

Maybe it's the cable? The tweeter in the cab definiltly works.

will33 · #5 11-16-2011, 06:30 PM

The speaker cable connection on the amp and/or cab may have some sort of switching jack system to engage the tweeter amp and or bypass the filter in the cab that the cable doesn't jive with.

adube810 · #6 11-16-2011, 06:30 PM

i would contact the original seller if they have enountered this issue previously and then tomorrow contact GK to troubleshoot it if that fails, and if there really is an issue with the biamp system worst case scenario take it to an authorized GK repair shop which will set you back a good bit

j_nition · #7 11-17-2011, 08:33 AM

Quote:

Originally Posted by adube810

i would contact the original seller if they have enountered this issue previously and then tomorrow contact GK to troubleshoot it if that fails, and if there really is an issue with the biamp system worst case scenario take it to an authorized GK repair shop which will set you back a good bit

oh man, i hope its not an amp issue. i cant afford another setback.

JHAz · #8 11-17-2011, 08:48 AM

Make sure you have the special speakon cable for this system. The tweeter amp uses the two connections that are normally unused (and therefore unwired) in a mono speakon setup. So a normal speakon cable will not let you biamp.

oops. missed that you had the right cable. I'd check the cable, then and make sure the "tweeter side" is live . . . .

bassgod0dmw · #9 11-17-2011, 08:48 AM

Quote:

Originally Posted by StongBass

Bi-Amp implies that two power amps are running two different cabinets (usually - there are some cabinets that have Hi and low speaker inputs). Sounds like your "tweet" output is not going to an actual cabinet? If you are only using one cabinet, then you should be running in full range mode.

GK amps going into GK cabinets work a little differently and can biamp.

Ogge · #10 11-17-2011, 12:20 PM

Man, looks like we have similar problems with byamping. Nothing happens when tweaking the tweeter knop even if bi-amp mode is activated and I'm using a GK speakon cable.

But when I try fullrange I don't hear any difference either when I'm tweaking the knob on the back of the cab. Does your tweater control on the cab work in full range?

j_nition · #11 11-17-2011, 08:25 PM

Quote:

Originally Posted by Ogge

Man, looks like we have similar problems with byamping. Nothing happens when tweaking the tweeter knop even if bi-amp mode is activated and I'm using a GK speakon cable.

But when I try fullrange I don't hear any difference either when I'm tweaking the knob on the back of the cab. Does your tweater control on the cab work in full range?

if your not getting tweeter action in full range mode when you dail it up from the l-pad on the back of the cab then i think your tweeter is blown.

finding this kind of funny, i expected more people to jump in on this from TB. GK seems to be a favorite around here.

doesnt anyone have an rb around here!?

**B-string** · #12 11-17-2011, 08:44 PM

Have you checked your speakon cable yet? 2+ and 2- on the cable feed the horn in the cab when the cab switch is set to biamp. You don't have the hi-cut switch in do you? The tweeter amp works automatically when a 4 pole properly wired speakon cable is attached to a Artist series cab set to biamp.
The manual is available here: http://www.gallien.com/manuals/1001RB-II_700RB-II.pdf

puremusic · #13 11-17-2011, 11:09 PM

Take your cable to a dealer who has a GK rb amp and a neo or rb can and see if your cable works with their gear. This way you can eliminate the possibility of a bad cable or a 2 conductor speakon cable.

ljazz · #14 11-19-2011, 05:14 AM

Are you activating the HMS properly? You have to set it on both the cab and the head (woofer hi-cut).

j_nition · #15 11-19-2011, 02:41 PM

Quote:

Originally Posted by ljazz

Are you activating the HMS properly? You have to set it on both the cab and the head (woofer hi-cut).

oh! whats up!!! i have it set on the cab but i have to have the woofer hi cut engaged for it to be activated from the head? i''ll check it out... also, will test the cable too.

thanks GK dudes!

j_nition · #16 11-19-2011, 09:01 PM

ok... so no luck. tweeter control on the bi-amp out in bi amp mode with a gk 4 conductor speakon cable into a gk neoII cab does nothing!

im at a loss, i think the biamp tweeter amp is toast. sucky

ljazz · #17 11-20-2011, 06:07 AM

Quote:

Originally Posted by j_nition

ok... so no luck. tweeter control on the bi-amp out in bi amp mode with a gk 4 conductor speakon cable into a gk neoII cab does nothing!

im at a loss, i think the biamp tweeter amp is toast. sucky

Okay, here's the deal..... you won't hear a whole lot.... it's just a tweeter. Try this -

-Turn down the master/woofer all the way.
-Make sure the woofer hi-cut is in.
-Turn off the tweeter hi-cut (with it in, it cuts the extreme highs)
-Turn the tweeter up and play. You should hear a little bit.

Remember, this isn't a true biamp deal. You have to think of the HMS as a way to adjust your tweeter without having to get around your cab to adjust the attenuater on the cab.