Question about Kustom High Voltage Hybrid HV100 Guitar Tube Preamp Combo Amplifier

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I have an HV100 Hybrid. When i turn the amp on, the volum eonly goes to a level 1 (just barely enough to hear it) and it will not go any higher. Since there is a signal, I know its not the guitar. I have tried changing the tube and it will work for an hour then it will happen again. Thanks...

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Posted on Jan 02, 2017

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SOURCE: I have a Kustom HV

After the volume drops off, let the unit sit idle for a minute and then try it again. If the volume has restored for another brief period, suspect the filter caps are weak and voltage drops when you start driving the unit. In any case you need to have it serviced. Unless you can see the heater in a tube going out with vibration this may not be a DIY repair. If you see purple glow in a tube, replace it.

Posted on Apr 04, 2011

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revrobert14210
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SOURCE: I have a Kustom HV

Sounds like a bad 6l6 tube that made a bad day for me also

Posted on May 16, 2015

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I have a Fender Tube Amp that no sound comes out. If I wear headphones I can hear the guitar very faintly. Any help?


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My Kustom HV100 amplifier turns on but takes forever to make sound. When it finally works it stays on the rest of the night. How do I fix this?


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Sound is distorted at certain frequency / volume what would cause this?


More infornation is required to provide a real answer, but I can give you a few possibilities:

1) There is a problem within the feedback loop that is allowing some frequencies through. This will be more prevelant at higher volume levels.

2) If there is a tube pre-amp section, the tube can be "microphonic". This too is generally more likely at higher volume levels.

3) Defective components in the amp section. These may pass some DC voltages that will sound like distortion.

If you can, please experiment a little to try to find when the problem is most obvious. With more details about when the problem occurs may give us enough info to determine the cause. Otherwise a trip to a service shop that has access to test equipment will be required.

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1 Answer

I turn it on and at the volume set @ U or straight up(midway) nothing comes out. if you turn it all the way up of course you get alot of buzz and barely get any sound from a mic or mixer signal,etc. could...


Make sure you are using BALANCED line to this... XLR connections boyh ends. Make sure ALL interconnected devices are powered from the same receptacle or power conditioner. Test your cables... they do go bad. This unit REQUIRES line level input. Do NOT expect a mic to drive it directely. Make sure your mixer uses the XLR outputs and is powered from the same receptacle, even if you have to run an extension cord to it. This is a bi-amped speaker so there are independent amps for high and lows. With nothing out and known good in there is very little electronics before the signal is split to the separate amps. At line level, your volume control should probably be about 2 o'clock with the EQ's straight up flat.

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1 Answer

I have a very loud hiss/buzz sound coming from my Roland. It goes away if I lower the high volume knob. This just starred to happen recently. I tried changing connections from ch1-4 but no fix.


If this ties to a keyboard, make sure the keyboard and this are BOTH plugged into the same receptacle. You should send a higher level from the keyboard (turn volume up to around 70% or so) and use less volume at the input gain of this amp. Use more at master volume if the amp has one if needed. If the hiss is there with NO input cables plugged in and input gains at 50%, that is objectionable, the amp probably needs servicing. Unused channel gains should be clear down.

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1 Answer

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The JBL EON 305's are 8 ohm speakers. The PMP5000 wi;; produce 400 Watts per side into a 4 ohm load (600 Watts peak). Into your 8 ohm speakers, the peak current will be halved while the voltage remains the same so you ACTUAL power per side is 200 Watts. It is hard to know how much you expect to get out of the amp. This power would fill a venue of at least 2000 sq ft. If you need more sound, try borrowing another 8 ohm speaker for each side and parallel them with the EON's as a test. That will double the power and add 3 Db more of sound. Your main slider should be around unity typically. This amp is a class D switching type (very efficient) and runs on +/- 70 volt rails. giving about 45 volts RMS output. At 4 ohms, this is just over 10 amps giving 450 Watts... at 8 ohms this is around 5 amps or 225 Watts.


Please read my tip on Fixya about the ground hazard of channel A when using 1/4 inch cables out of the PMP units... essentially the BARREL of the connector from channel "A" is the HOT,... NOT the tip of the PLUG. Ground the barrel IN ANY WAY AND YOU FRY CHANNEL "A" AMP !!!

Jan 16, 2011 | Behringer Europower Pmp5000 Powered Mixer...

1 Answer

Fender ultra deluxe amp volume max out a number 7 volume control. will not get any louder


It is likely that the amp is flat topped at the 7 setting. When the amp is producing the maximum voltage output it is capable of, that is ALL you can get out of it... The numbers on the dial mean NOTHING and are only relative. If you have high output guitars you might find the maximum might only be 3 on the dial for example...
If you need it louder, get a bigger amp and speakers. You should ALSO get a sound meter and follow OSHA guidelines for sound exposure... I know several musicians that now are nearly deaf because of being exposed to high sound levels... their music careers are now gone as they can no longer hear well enough. You need to protect your hearing for the long term. Great musicians don't need loud, but quality and inovation in their music.

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3 Answers

I have a Peavey 8600 amplifier. It sounds great but when only operating vocals, in order to get the highs of your voice just right, the speakers put off a large amount of white noise. While singing, you...


There is not enough info here to provide a complete answer, but let me give you some background:

There will always be some hiss. This is due to general amplification where a small amount of noise is amplified along with the general signal. In most cases, the signal is strong enough to overpower any noise that is present (vocals in your example). This noise should not be that noticable in normal cases. If there is an automatic gain control in the line, this could account for it as with "silent" times, the gain will automatically be increased potentially to the degree where the noise is noticable.

Barring that scenerio, if the input signal is too low, the overall gain necessary to produce reasonable volume at the speakers will also be such that the noise is noticable. In order to track this down, please provide details about the current setup including:

1) Microphone make and model being used
2) Input being used on the mixer
3) Gain level being used for the mic channel
4) Gain level being used at the master level.

Dan

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Problem using Kaoss Pad for synths.


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