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questions about my GK 1001RB

J

jjl5590

Inactive
Mar 28, 2008
406
0
London, UK
#1
Hi,
Ok, so i have rather a lot of (strange) questions, so please bear with me!

I took the cover off the amp prior to asking these questions.

1: When the mute button is pressed, there is still sound coming from the woofer if the master is cranked. is this normal?

2: In the GK manual, it states:
"Effects Return: Returns the Effects Loop signal
to the signal path. May also be used as a secondary
input for another instrument or CD player. The preamp
signal is not interupted if the Send jack is not used."
But when I plug my iPod into the effects return (and nothing in the effects send) it cuts off my bass input so all i can hear is the ipod..

3: The manual says to use a 10A fuse for 230v, but mine has a 5A fuse in it. Does that matter?

4: I thought the GK 1001RB was suppost to have 2 amps in it, one for the woofer and one for the tweeter. I can only see one? I'm probably wrong though..

5: The big heatsink gets very hot, no matter what i'm doing. Even if i'm just playing my ipod quietly through it, it will still get hot quickly, and then the fan will kick in. However, the heatsink gets too hot to touch and the fan still hasnt come on. it only comes on later. And it seems to have a mind of its own. it never spins fast enough to make an audiable noise. Some people complained that the fan on this amp loud, making studio recording a pain. but mine is silent. Also, once it starts spinning, if i give it a little spin, it will continue to spin faster and not revert to its original slow pace. alternatively, if i stop the fan, it wont start again until i spin it. this is at 8ohms. I'm scared to try it at 4ohms for fear it will catch fire.

6: When plugged in and switched on, i put my finger on the circuit board and felt a weird static feeling on my finger. Is it suppost to discharge electricity like that?

7: There seem to be 3 or so plug sockets in the amp that don't have any wires going into them. I've included some pics to illustrate what i mean:

th_DSC02052.gif


th_DSC02054.gif


And one of the whole amp:

th_DSC02049.gif



Cheers for ANY help given!

Thanks
 
#4
Statement #2 is right. Plugging something into the return will shut off the signal coming from the preamp to the amp section. You can put something in the send though and it won'f affect it.
Keep you hands out of the amp when it's plugged in. You are dealing with 240 volts over the pond!
Something is wrong with the amp. If shouldn't get that hot. The fan doesn't always run. It cycles based on temperature of the board.
Wes
 
#5
I don't mean the casing of the amp gets that hot, that just gets warm. But the black heatsink inside the amp gets too hot too touch, very quickly, and even then the fan doesnt kick in. But when the fan does run, you can feel all the hot air being pushed through the front grill. Does yours do that?
 
#6
You are discribing a bad fan motor, have it replaced (I believe it is a 24 volt fan?).
NEVER PUT YOU HAND IN ON A RUNNING AMP'S circuit boards unless you are REALLY well trained.
The 10 amp fuse is for 100-120 volt operation, 5 amp is the fuse for 220-240 volt operation.
Effects jacks already answered, typo in manual.
The woofer amp and tweeter amp are on the same circuit board.
Don't worry about unused connectors unless the amp doesn't function (maybe for test purposes).
 
#9
It sounds like it is working as designed, but you may want to have a qualified tech check it out.

Electronic devices are designed to run cooler with the cover on. Having the cover on facilitates air flow within the chassis.

I work on high end servers (some ship with ear protection due to loud fans) and removing the cover will cause the fans to throttle up to max RPM. heat sinks do get hot, they are designed to dissipate extreme heat. Always wait a few minutes for them to cool off before handling, as they can cause serious burns. Same goes for heat sinks on CPU's, video cards, and memory.

As others have said -NEVER touch the inside of an electronic device while it is on or plugged in. You could be seriously injured or killed. Capacitors can hold a charge even while the amp is unplugged and a discharge can give you a jolt, so you should unplug and hold the power button for 10 seconds to drain any residual power from the systems.
 
#10
Does your mute switch actually mute the amp? because mine doesnt fully.

Also, when your fan does come on, can you hear it? Some people were saying it gets annoying for studio recording because the fan noise would get picked up by the mics. When my fan comes on, i dont know its spinning unless i look at it, and this is in my quiet bedroom. I think the fan is spinning too slowly perhaps
 
#13
Dude!!! DO YOU READ THE PART THAT SAYS

Do Not Open The Amplifier Enclosure:
There are no user-serviceable components inside this
product. Opening the amplifier enclosure may present a
shock hazard, and modification to the product will void
your warranty.

Why are you opening the amp and touching the heatsink? If you know it is a heatsink, you it is there to remove heat. The cover is there to keep people from touching it and the circuitry.

The weird static feeling is called electricity. Electricity will kill you. Stop doing that.

Put the cover on the amp. Leave the cover on the amp.
 
#15
Cristo said:
Dude!!! DO YOU READ THE PART THAT SAYS

Do Not Open The Amplifier Enclosure:
There are no user-serviceable components inside this
product. Opening the amplifier enclosure may present a
shock hazard, and modification to the product will void
your warranty.

Why are you opening the amp and touching the heatsink? If you know it is a heatsink, you it is there to remove heat. The cover is there to keep people from touching it and the circuitry.

The weird static feeling is called electricity. Electricity will kill you. Stop doing that.

Put the cover on the amp. Leave the cover on the amp.
Click to expand...

well i bought the amp used so i wanted to make sure everything inside was ok. The amp gets very hot after 10 minutes of playing, the heatsink gets too hot to touch. On my warwick 300W amp, everything was always cold, even the heatsink.
 

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