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What kind of CD unit are you using? Is it a portable, rack-mount, stand-alone, or via computer output? This information is necessary. I will be glad to help otherwise.
Could be a few issues. If it is powered up when you plug it in, it might have a short circuit protection that shuts it down, or a thermal overload that is over sensitive. It might also be an issue with the cable you are using to connect it, from a broken wire to one that has a plug just slightly too long- there are 5 different tip lengths.
This also assumes the input itself is not being over driven, and that the output is not shorting out either..
could possibly be the volume switch, try changing the switch with one that you hardly use to eliminate the problem. any further probs just let me know. hope this helps
Realize that the number on the volume control is only relative... it means nothing regarding what the amp can produce. With a high level output guitar you can easily drive the amp into distortion at very low volume control level settings... what counts is the actual output sound volume and specifically the voltage output going to the speaker. Once the amp reaches saturation, any further input just pushes it into distortion or "flat topping".
An oscilloscope on the output will quickly show when amp starts to flat top.
The sound on all the stock kits I found to be too low. What I did was create a custom kit and altered the dynamics of all the pads and cymbals - once you're in the dynamics settings, just hit the pads/cymbals the hardest you normally would and save that setting!
Is volume at headphone normal? Does volume control vary the volume even though it might be low?
Has any internaal settings been changed before this happened? Has an accident happened involving the output cables?
You can reach the limiting IRRESPECTIVE of where the volume control is set when you have a guitar or other source that has HIGH output.
Guitars that have battery in them with internal amplifiers are an example of a high output guitar. Plain inductive pickups may require the volume control to be set at say 70% to reach limiting.
Please NOTE that the volume control is NOT linear, but is an "audio taper".
Limiting means you are probably driving it too hard. Many learn the hard way when speakers and thee power amp fail.
When the cone is driven too far beyond the pole pieces of the magnet, then the IMPEDANCE of the speaker becomes relatively low and can damage the power amp. The limiter tries to prevent this by sensing the current and or voltage and will back off the gain internally. This causes distortion when it happens.
Might want to try turning the volume control back and forth. IF you hear scratching, there could be some dirty contacts that are causing this problem. Turning the volume control back and forth sometimes helps "clean" it.
I'm having the problem too...I'm thinking that maybe getting the DC adapter MAY fix it though as stated in the Manual: "...The output level of the mini-KP will be smaller than its input level. This is because the attenuator circuit is connected at the input section, considering that the mini-KP is used on battery power." so maybe the dc connector will increase output volume?
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