20 Most Recent Behringer Ultratone K3000fx 300w Keyboard Amplifier New Questions & Answers


Greetings! Ok, your amp has an XLR (3-prong) Low-Impedance input on Channel 1 for a Mic. All the other inputs are 1/4" High Impedance inputs, which are for instruments and/or other High Impedance items including low quality High Impedance Microphones. The SM48S is a high quality Low Impedance microphone, so if you use it with a 1/4" plug, it will be in a High Impedance channel, and will be very LOW in volume in comparison with everything else. So, you must use an XLR (3 prong) cable from the Mic to the Channel 1 input on your amp. That will do the trick. Good Luck with your new amp and Mic!

Behringer... | Answered on Dec 06, 2017


Probably a component in the power supply is overheating, You need to take it to the repair shop.

Behringer... | Answered on Jul 11, 2016


I would try cleaning the jacks and the input volume pots as a starting point. You can always remove the electronics and ship them to a service center. If it's not in warranty, you can just take it to any local repair shop.

Behringer... | Answered on Aug 10, 2015


The speaker may be blown, but if you're getting continual Hi-freq feedback that is not resolved by lowering the volume know, you need to take this to the repair shop.

Behringer... | Answered on Apr 29, 2015


Start with a 5 amp fuse and see if that holds. If it doesn't go to 10 amp. If that pops, you will have a power supply or amplifier fault. Good luck

Behringer... | Answered on Aug 14, 2014


Look at this one:

http://elektrotanya.com/behringer_k1800fx_sch.pdf/download.html

This is for the 1800 however...

Often they will just double up with two amps, one inverted, and use in bridged mode.at the higher power in what we call an "H" arrangement.

Since the drains are tied together, the heatsinks MIGHT be hot output level.

Behringer... | Answered on Aug 07, 2014


Step 1:

Hate to say it, but possibly a blown speaker. To check this, do the following -


Step 2:

Insert headphones into jack to verify for sound there.

Step 3:

Unplug unit and open rear panel to reveal speakers.

Step 4:

Remove leads from woofer.

Step 5:

Using a multimeter, set to OHM (horseshoe) to lowest setting.

Step 6:

Apply red(+) and black(-) to speaker leads. Meter should read at least 4-8 ohms of resistance.

Step 7:

If no reading, then voice coil is blown.

Step 8:

If no meter available to use, the use a 9 volt battery by applying direct connection to speaker leads in an off-and-on fashion - You should hear a "click" sound come from speaker. If no "click," then speaker is blown.

Step 9:

If click is heard, and resistance on meter is correct, then the amp circuitry leading to the woofer may be blown = repair needed.

Behringer... | Answered on Jan 26, 2013


you have a fried circuit maybe or a fried power supply

Behringer... | Answered on Jan 06, 2013


For a start , check headphones out.


• if it don't work , check power supply of the preamps.


• If it is OK, could probably the main amp have fail.

But check the main volume .

Behringer... | Answered on Sep 13, 2012

Not finding what you are looking for?
Behringer Ultratone K3000fx 300w Keyboard Amplifier New Logo

26 questions posted

Ask a Question

Usually answered in minutes!

Top Behringer Music Experts

Michial Gueffroy

Level 3 Expert

1138 Answers

Vito Vacirca Jr.

Level 2 Expert

140 Answers

Matthew Spark
Matthew Spark

Level 3 Expert

1066 Answers

Are you a Behringer Music Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

View Most Popular

Behringer Music

  • Behringer Music

Most Popular Question

suddenly stops working wait few minutes

  • Music
Loading...