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290,125 members
172,721 posts
  • New
    djreplay2609
    Newcomer - Level 1
    2022-07-04

    How to unlock without a password? Reset?

    0 6
    • djreplay2609
      djtetei I don't own that particular amplifier but, as far as I know, you should connect the amplifier to a computer, via USB cable, and use Behringer's proprietary software to unlock the unit and set another code.
      • Mon at 6:20 AM
  • New
    Denitsio1
    Newcomer - Level 1
    2022-07-01

    Hi, I Have a Behringer V-Tone GMX1200H head unit which has the Preset FX Processor knob broken off.

    The knob and stem part is missing. All that remains is the base of the stem. I'm interested in getting a replacement knob and the mechanism it it attached to. Think its called a potentiometer.

    Wondering if anybody can steer me in the right direction.

    Thanks in advance,

    Dennis

    read more...
    0 5
  • New
    MattPalmer
    Contributor - Level 2
    2022-06-27

    My inuke stopped working. Starts to fire up but then fan shuts down after a few seconds and all the channels have the red circles. They dont turn orange. Is there a fix or is this amp toast?

    Thanks

    Matt.

    0 14
    • MattPalmer
      djtetei Disconnect the speakers and try to power on the amplifier without any load. If the described symptoms still persists, you may have to open the amplifier for service.
      • Jun 27
      • Red rings of death? Inuke nu4 6000
        MattPalmer Yeah i tried that at home. Still get the red rings. Thank you.
        • Jun 27
    • MattPalmer
      djtetei Focus on power supply and capacitors.
      • Jun 27
    • MattPalmer
      StaffordAV Hi Matt,
      I have an nu6000dsp with the same problem. It turns on and all the dps functions work, but the rings stay red and there is no output.
      I’ve had a quick look at it, and the main ht rails to the amplifier seem to be controlled by a KA3525A switch mode controller. Having checked the data sheet, this has a shutdown facility (pin 10), which should be pulled low to turn on the output. Mine measures at about 4.5 volts, which might be causing the lack of ht voltage. All the other voltage rails are working OK.
      When I get some time I’ll disconnect pin 10 on this ic and tie it to ground with a resistor, and see if I get power to the amplifier; which will then determine the next course of action.
      Not knowing your background, or whether you have any experience at electronic repairs, I can’t recommend just poking around inside the amp, but it is something for you or your friendly tech to look at.
      • Jun 28
    • MattPalmer
      MattPalmer

      My Tech guy said these can't be repaired he said not even by behringer. Little to no support and that they were designed to last 5 to 10 years and I should basically just throw it in the garbage...

      • Jul 1
    • MattPalmer
      StaffordAV If you can get replacement parts, or their equivalents, pretty much anything can be repaired. Whether it makes economic sense is a different matter; probably not for Behringer.

      Regarding the red rings of death. I have now had a chance to look at this a bit more closely. The first step was to remove the KA3525 controller (IC3), and replace it with a socket, which would make experimenting easier. That done I put in a SG3525, which is an equivalent ic. Turned on and it worked; temporarily. Having fitted it into a socket let me easily disconnect pin 10, the shutdown pin, after which the amplifier worked OK. However, as this probably disables all the protection circuitry, not really a satisfactory repair.

      Back in a working state, I was able to test for correct voltages around the circuit. The shutdown voltage is provided by IC2, a 555 timer, whose reset pin is connected to ground through a transistor (T4). When the base of the transistor is low (mVs) the output of the 555 is high (3.5V) and the amp shuts down. When it is working there should be about 4.5 volts on the base of T4. On my amp the voltage here was low, so the output of the 555 high, causing the amp to stay in protect mode.

      The problem turned out to be a transistor (T9), which when the amplifier is turned off pulls the control voltage low enough to trigger a shutdown. Removing this transistor let the amplifier power up properly, but it wouldn’t turn off. T9 is a surface mount npn transistor, which I have replaced, and the amplifier now seems to be working correctly.

      I’m not sure if the original KA3525 ic was faulty, but the total cost of replacement parts was less than £1UK so replacing it was not really an issue.

      I don’t know if this is a common cause of the amplifier being stuck in protect mode, but removing T9 can be done without taking out the psu board, so is an easy first thing to try. Before doing anything else, measure the voltage across C24; it should be about 4.5V on a functioning amplifier.

      The base of T4 can also be pulled low by T2 a thyristor, which is triggered by DC offset voltage on the amplifier output. It is connected to the main amplifier board through an opto isolator; so something else to check if T9 is not the problem. Obviously check that there is no DC on the output and the protection circuit is working properly.
      • Jul 1
  • New
    djtetei
    Newcomer - Level 1
    2022-06-19

    Behringer KM750 specifications state a voltage gain of 32dB. However, if we do the math, the published voltage gain value doesn't add up.

    The specifications states that the KM 750 delivers 200 watts into 8 ohms with an input sensitivity of 0.775 Volts.

    Output voltage formula: sqrt (power x impedance)

    Output voltage calculated: sqrt (200 x 8) = 40V

    Voltage gain (amplification factor): output voltage / input voltage = Av (amplification factor)

    Voltage gain (amplification factor) calculated: 40 V / 0.775 V = 51.62

    Voltage gain (dB) formula: 20log(Av)

    Voltage gain (dB) calculated: 20log(51.61) = 34.25 dB

    The calculated voltage gain is 2 dB higher than the specified voltage gain.

    The only scenario the specified voltage gain is 32 dB is if the input sensitivity is, in fact, 1 Volt.

    Furthermore, if we take the officially specified input sensitivity (0.775 V) and voltage gain (32 dBU) and do the math, we arrive at a different result for the output power of 119 watts, which is less than the officially specified power into 8 ohm load.

    So, the following question arises: when input sensitivity of 0.775 V is selected, the maximum input voltage required for maximum rated power is 0.775 V (0 dBU) or 1 V (+2 dBU)?

    The following scenario applies to Behringer KM 1700, also.

    Update:

    On 29.06.2022, MusicTribe Customer Solutions Specialist Mr Kyle Johnson replied to my support ticket,  and his answer is as follows: "The 200W is the peak power not the RMS, the calculation should based on the RMS 130W for KM750 and 310W for KM1700. Also, the peak power is actually about 210W."

    This is important information and should definitely be included in the product's user manual.

    Starting from this, suppose we now have a peak power of 210W into 8 ohm load.

    Calculate the peak voltage: SQRT(210*8)=40.987 Vpeak

    Calculate the RMS voltage: 40.987*0.707=28.977 Vrms

    Calculate power (RMS): SQR(28.977)/8=104.95 W

    Calculate amplification factor (X) for 0.775 input sensitivity: 28.977/0.775=37.389

    Calculate dB voltage gain: 20*LOG(37.389)=31.454 dB 

    As you can see, the statement about 130 W RMS doesn't hold up.

    Amplifier power is calculated, not measured.

    A Voltmeter measures voltage in volts. An Ammeter measures current in amperes. An Ohmmeter measures resistance in ohms. Any two of these measurements will allow calculation of amplifier power (in watts).

    If you search MusicTribe knowledge base articles, under Behringer brand you will find an article called "What is RMS" with the following statements:

    "We no longer list our amp power ratings by RMS as these tend to not give true results as tests are always done using signal generators and specific waveforms which don't reflect in comparison to music, music comes at fuller frequencies and non linear dynamics which of course as I'm sure you're aware is nothing like a test tone generated from a signal generator...As a rule of thumb, you can assume RMS is around half the peak value."

    Of course music comes with broad frequency range and nonlinear dynamics, because music is mixed and mastered in a specific way, to ensure tonal balance and a specific dynamic range to make it sound good. Its purpose is to be listened and not to be used as a test tone for audio equipment capabilities and limits, although there are certain instruments that can put an audio equipment to the test. On the other hand, test tones are created and used specifically for testing and measurement of audio equipment capabilities and limits. By using test tones and filtered noise waveforms able to stress and measure the audio equipment capabilities and quality of assembly, manufacturers ensure the customer's piece of mind, knowing that when the specific equipment is used with music, it will never reach the operational limits, unless it is used by reckless or unprofessional people. A 0 dBFS test tone with a crest factor of 3 dB is able to push an amplifier or a loudspeaker to its limits, if played long enough, compared to a music track with a crest factor (dynamic range) of about 14 dB, because the latter will never bring an amplifier to its current limits. As many of you know, music is mixed and mastered with different dynamic range, according to the author or the mastering engineer tastes, resulting in dynamic range values between 6 and 20 dB, which makes it difficult to be used as a test reference. You could use music as a test reference if all music tracks are mastered to the same dynamic range (crest factor) target level, but that is not the case. Therefore if a certain audio equipment manufacturer choose to publish peak values for power ratings, it can also publish the calculated average power output relative to the measured RMS voltage output of its equipment, under specifically stated test conditions (proprietary or standardized), and stand behind its statements, ensuring the proper sound system design and implementation for a potential customer. In my experience, failing to disclose usefull information to the customers and failing to provide a solid customer support for parts, warranty and technical feedback is a sure way to destroy a brand's image and affect its business future, even if that particular brand is making good efforts to offer competitive products in terms of functionality. 

    Anyway, as a conclusion, it seems that if you want to match your speakers RMS / continous power rating with a Behringer amplifier power rating, you should expect half of the declared power ratings.

    Therefore, the calculated parameters for Behringer KM 750 and Behringer KM 1700, based on published specifications are as follows:

    Behringer KM 750:

    Peak Power / channel @ 8 ohm: 200 W

    Peak voltage: SQRT (200 X 8) = 40 V

    RMS voltage: 40 X (1 / SQRT(2)) = 28.284 V

    Average continous power @ 8 ohm: SQR(28.284) / 8 = 100 W

    RMS current: 100 / 28.284 = 3.535 A

    Peak Power / channel @ 4 ohm: 400 W

    Peak voltage: SQRT (400 X 4) = 40 V

    RMS voltage: 40 X (1 / SQRT(2)) = 28.284 V

    Average continous power @ 4 ohm: SQR(28.284) / 4 = 200 W

    RMS current: 200 / 28.284 = 7.071 A

    Amplification factor for 0.775 V input sensitivity: 28.284 / 0.775 = 36.519

    Voltage gain for 0.775 V input sensitivity: 20 X LOG (36.519) = 31.250 dB

    Amplification factor for 1.4 V input sensitivity: 28.284 / 1.4 = 20.203

    Voltage gain for 1.4 V input sensitivity: 20 X LOG (20.203) = 26.108 dB

     Behringer KM 1700:

    Peak Power / channel @ 8 ohm: 500 W

    Peak voltage: SQRT (500 X 8) = 63.245 V

    RMS voltage: 63.245 X (1 / SQRT(2)) = 44.721 V

    Average continous power @ 8 ohm: SQR(44.721) / 8 = 250 W

    RMS current: 250 / 44.721 = 5.590 A

    Peak Power / channel @ 4 ohm: 800 W

    Peak voltage: SQRT (800 X 4) = 56.568 V

    RMS voltage: 56.568 X (1 / SQRT(2)) = 40 V

    Average continous power @ 4 ohm: SQR(40) / 4 = 400 W

    RMS current: 400 / 40 = 10 A

    Amplification factor for 0.775 V input sensitivity: 44.721 / 0.775 = 57.742

    Voltage gain for 0.775 V input sensitivity: 20 X LOG (36.519) = 35.229 dB

    Amplification factor for 1.4 V input sensitivity: 44.721 / 1.4 = 31.943

    Voltage gain for 1.4 V input sensitivity: 20 X LOG (31.943) = 30.087 dB

    read more...
    0 20
    • djtetei
      PedroRodrigues Hi djtetei, thank you for your post, In this case I would suggest to submit an assistance request directly to our Tech Support Team via the link below to clarify this matter: https://community.musictribe.com/pages/create-new-ticket?type=Technical%20Support&brand=Behringer Thank you
      • Jun 20
      • Behringer KM750 & KM1700 voltage gain specifications
        djtetei CAS-608741-G1P0W9, opened on 20.06.2022. Still waiting for an answer from your staff.
        • 1
        • ·
        • Jun 27
    • djtetei
      djtetei CAS-608741-G1P0W9, opened on 20.06.2022. Still waiting for an answer from your staff.
      • Jun 23
      • Behringer KM750 & KM1700 voltage gain specifications
        PedroRodrigues Hi djtetei, thank you for your post, please accept our apologies, this matter is being managed by one of our colleagues and we will reply ASAP. Thank you
        • Jun 29
    • djtetei
      djtetei Mr. Kyle Johnson from Behringer staff replied to CAS-608741-G1P0W9: "The 200W is the peak power not the RMS, the calculation should based on the RMS 130W for KM750 and 310W for KM1700. Also the peak power is actually about 210W."
      • Jul 1
  • New
    Shanemorey
    Newcomer - Level 1
    2022-06-18

    Blew an output (B) on the board and am looking for where to find a replacement board.

    0 7
  • New
    JimiCactus
    Newcomer - Level 1
    2022-04-12
    0 13
    • JimiCactus
      ChrisEdwards1 Hi JimiCatus, If you have not done so please submit a parts request. This can be done via the support tab at the top of the page.
      • Apr 12
      • Where can I order and get instructions on how to replace aBERHINGER EUROLIVE B208D 1.5 COMPRESSION HORN DRIVER
        JimiCactus BERHINGER EUROLIVE B208D 1.5 COMPRESSION HORN DRIVER ON EBAY
        • Apr 13
  • New
    mck3
    Newcomer - Level 1
    2022-04-04

    Does ANYONE know of a way to contact Behringer to find out WHO can repair both my PPA500BT's? Both are less than a year old and both are are doing what others describe. No output and flashing lights on panel. I appreciate the bullcrap Tribe stuff but enough of the cutsey crap. I need help and it does seem that the "Tribe" leaders could care less. 6 months and no response. AND IF I GET ONE MORE FILL OUT A FORM im going to blow up!

    Who can fix? WHere are possible vendors that fix? Are PPA500BT's fixable or are they doorstops . Yes I'm pissed but nevertheless I feel someone at Behringer could help.

    read more...
    0 16
    • mck3
      Nigel67 Hi mck3. I am very sorry for the issues you have been experiencing contacting us. You mention that the speakers are less than a year old which means that they are still under warranty. Have you contacted our partner that you purchased them from and asked for a warranty repair. Our partners are responsible for repairing all warranty issues. How have you been trying to contact us over the past 6 months as there is no account set up for you in our database under the e-mail address you have provided? Have you used another e-mail address? Do you have a case number please? I can then look up your case and find out why we have not responded to you previously. Many thanks
      • Apr 4
    • mck3
      RonaldFigura You are on the Behringer official community so you should be able to get a resolution here.
      • Apr 10
  • New
    jftaylorjr13
    Newcomer - Level 1
    2022-04-03

    I've been asked to do an event this Spring with my EUROPORT PPA2000BT on an island with no power.  My questions are 1) what would be better a generator or an inverter/battery power source, and 2) would use of such a power source like this void any warranty??? 

    read more...
    0 10
    • jftaylorjr13
      Dale_M The PPA2000BT comes with a switch mode power supply which means it can be used anywhere in the world as long as the power being delivered to it is between 120v - 230v AC. Inquire with the generator hire company if they can can guarantee this.
      • Apr 6
  • New
    jackman66
    Newcomer - Level 1
    2022-03-15

    Hello!

     

    I have a Behringer V-Ampire LX1-112 amp, and I finally replaced the damaged dual jack input module (input and headphones), but somewhere along the way, the volume pot and red light power level display has stopped working. Not sure why; all connections are solid and the module is brand new. Neither the new module nor the old module make a difference to the power to the volume pot. All the other pots and red light levels show up on all the other knobs, but not the volume. Can someone please tell me what pot I need to find? Is there a specific model number? The replacement looks pretty straightforward, so I am happy to do some soldering and resoldering if needed. Thanks for all your help!!!

     

    Jack

    read more...
    0 13
    • jackman66
      Dale_M Hi there if you are not familiar with electronics rework it can be easy to fix one problem and create another, we cannot share schematics but if you advise the pots component position on the PCB we could advise the part that is used. That said, it may be far quicker for us to assist you with a local non warranty repair at an official Behringer repair centre, if you wish to take this advice simply go to the Support tab above and select Service.
      • Mar 16
  • New
    Blackwido
    Newcomer - Level 1
    2022-03-14

    Thanks for reply I tried 9v battery on one no difference.. never mind think about a multi unit instead tks

    0 11
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