denon mc6000 mk2 mic problem

[hadyn]

Hi
i have upgraded my denon mc6000 mk1 to a mk2 a few months ago and now running vdj8 as oppose to vdj 7 on the old denon
i have just noticed a problem with the mic channel that i cant seem to work out whats wrong and wondering if there is a problem with it.
the mic channel 2 when i use it is producing sound from the mic even though the dial is on minimum.
i have tried a wired mic with just a xlr cable and still the same and i have tried 2 different sets of wireless microphones which are both producing the same fault.
the wireless mics are plugged in with the supplied mono jack cable which i have also changed and although the mics are working and the dial is still increasing the db, they are still loud enough to be heard with the dial at minimum which i believe is -16db
next thing to try is process of elimination by plugging in the old denon again to see if there is a problem or setting error with the mk2
hopefully i have explained this fault clear enough for someone to offer any advice
thanks

[Excalibur]

Short and slightly tongue in cheek suggestion: Buy a little live mixer, use the mic channels on this, and feed the Denon into a line input. Many folk used to run the Mk1 thus as a matter of course, as the mic channels were less than perfect. This also allows you the bonus ( Bonus? :confused: ) of running multiple mics with effects for Karaoke.

Detailed answer, sorry I have no idea at all.

[Nakatomi]

The 'dial' as you call it is just a gain control. What I believe you have to do to turn the mic channels on & off is.... use the mic ON/OFF buttons. I don't own an MC6000 (yet) but that's my understanding. If the reality is any different I suppose I might as well save my money & buy a new controller with no mic inputs & continue to use an external mixer for mics. Bleugh

[hadyn]

The 'dial' as you call it is just a gain control. What I believe you have to do to turn the mic channels on & off is.... use the mic ON/OFF buttons. I don't own an MC6000 (yet) but that's my understanding. If the reality is any different I suppose I might as well save my money & buy a new controller with no mic inputs & continue to use an external mixer for mics. Bleugh

well with the gain control on the mk1 being terrible I thought they had sorted out the issue in the mk2
on the mk1 the gain control would go from -16db with no sound coming from the mic to well over the top sound after adjusting the gain control just slightly and this is the reason I decided to upgrade.
I may resort to what Excalibur has advised as I already have a brand new Yamaha mixer that I was going to integrate for karaoke anyway, its just extra kit that I have to find space for on my shelf :)

[Excalibur]

The 'dial' as you call it is just a gain control. What I believe you have to do to turn the mic channels on & off is.... use the mic ON/OFF buttons.

Ah. There you go, I answered the original question, but Juski has stood back and taken a wider view. Well done that man. He is of course absolutely right about the on/off switch, and I use my ADJ VMS 4.1 in exactly the same way. I'm not sure that turning the gain down to minimum is designed to cut the sound out completely ( although I believe it does on my ADJ equivalent ), which is why there's an on/off switch.

What I'm not clear on is whether mic channel 1 on your Denon works as you wish, and you have issues only with channel 2? If that's the case, then it may be a box ticked or unticked in the software somewhere, or a faulty gain control on one channel.

[djdj]

Just a little extra tip
Ensure the controls on the front of the unit are all turned to minimum when not using a second Mic
I have caught mine on more than one occasion! :o

[Nakatomi]

Just a little extra tip
Ensure the controls on the front of the unit are all turned to minimum when not using a second Mic
I have caught mine on more than one occasion! :o

So er.. as opposed to adding maybe the tiniest smidgeon of hiss, what does not turning an unused mic input down result in? If it hums or buzzes, it really should not. I've seen the schematics for the Denon mic inputs and as far as I can remember the jack input shorts to ground when there's no plug in it (as a lot of devices do).

[hadyn]

So er.. as opposed to adding maybe the tiniest smidgeon of hiss, what does not turning an unused mic input down result in? If it hums or buzzes, it really should not. I've seen the schematics for the Denon mic inputs and as far as I can remember the jack input shorts to ground when there's no plug in it (as a lot of devices do).

regarding the schematic diagram for the denon mc6000 mk2, am I write in thinking the xlr connection defaults to mic 1 channel and the jack plug connection defaults to mic 2 channel
I seem to remember on satuday night plugging an xlr cable into a standard shure 58 mic on mic channel 1 and the mic was still producing sound at a reasonable level on mic 1 channel with the gain dial on minimum.

im going to plug both denons in tonight and find out what the problem is as haven't had time over the weekend and will let everyone know once I do...........
thanks

[djdj]

Hi
the mic channel 2 when i use it is producing sound from the mic even though the dial is on minimum.
i have tried a wired mic with just a xlr cable and still the same and i have tried 2 different sets of wireless microphones which are both producing the same fault.
thanks


So er.. as opposed to adding maybe the tiniest smidgeon of hiss, what does not turning an unused mic input down result in? If it hums or buzzes, it really should not. I've seen the schematics for the Denon mic inputs and as far as I can remember the jack input shorts to ground when there's no plug in it (as a lot of devices do).

I think you need to re read post, before you have a go!


im going to plug both denons in tonight and find out what the problem is as haven't had time over the weekend and will let everyone know once I do...........
thanks

I love my mk1 mc6000 but the Mike inputs are crap!
I have a DB reducer on the main mic and if I use another mike I plug it into one of the other channels (via another mixer if wired)
It's a shame id Denon have not sorted this fault on the mk2
Good luck

[TONYTIGER]

To be honest it is not only Denon,most modern day controllers the mic section are leaving a lot to be desired but the manufacturers do not think it is important i mean when does a dj a need to talk .:confused:

[CRAZY K]

To be honest it is not only Denon,most modern day controllers the mic section are leaving a lot to be desired but the manufacturers do not think it is important i mean when does a dj a need to talk .:confused:

LAST ORDERS AT THE BAR :rolleyes:

Please move your Ford Galaxy, its blocking the exit to the Pub.:D:D:D

[Nakatomi]

It isn't a fault if the minimum gain setting still results in sound coming through the channel. It's not a fader or volume control it's a gain control. The output level control on the back of my radio mic receiver doesn't step the output down from full to nothing. It only goes down so far. Simples.

Is the gain range workable? If the answer is yes, there's no problem. If you can't turn it down enough to accommodate a loud radio mic output or something, then you'll have to find another solution for routing it into your setup.

Look at the issue this way: You designed an input level control but the lowest usable working point is half way (i.e. under half way you can't hear much). You've just wasted half of the range of the control for no good reason. If at its lowest setting you get loud, undistorted audio I'd maybe question its usefulness still further.. but there are on/off switches up top for disabling the channels anyway.

I wouldn't be surprised if other Denon channel gain controls don't completely cut the signal off either.


I think you need to re read post, before you have a go!


I meant WHAT HAPPENS when you enable the input with nowt plugged into it? Very little should happen, if anything.

[Excalibur]

To be honest it is not only Denon,most modern day controllers the mic section are leaving a lot to be desired but the manufacturers do not think it is important i mean when does a dj a need to talk .:confused:

Amen Brother, amen. Terrible shame. :(

[hadyn]

still havent had time to go in the garage and fiddle with the denon controllers yet but thinking about it, this didnt happen on the mk1 which i had for a couple of years and thinking about it further again, im sure this didnt happen on the mk2 when i first used it for a month or two and the gains on the wireless mics has not been altered and the shure 58 mic does not have any gain as a standalone mic so somethings not right.
i appreciate all the advice so far though

[Nakatomi]

still havent had time to go in the garage and fiddle with the denon controllers yet but thinking about it, this didnt happen on the mk1 which i had for a couple of years and thinking about it further again, im sure this didnt happen on the mk2 when i first used it for a month or two and the gains on the wireless mics has not been altered and the shure 58 mic does not have any gain as a standalone mic so somethings not right.
i appreciate all the advice so far though

If the mic input level controls used to go all the way to zero ( which isn't unreasonable to assume if I'm honest) and they now don't, it would suggest one or more of the following is wrong inside:

Broken pot(s) at the 'earthy' end.
Dry solder joint(s) at the earthy end of the pot(s)
Broken PCB trace(s).
A broken resistor.

Knowing how Denon assemble this kind of stuff I'd lean towards the former unless it's taken a serious knock at some point.

I'll try to look at the user manual to learn how far the gain should be reducable, since I've lost the service manual I found.