Markbass farting out and overheating

[brad70]

I need help!!!
I have a Markbass Littlemark tube head, a Little Rocker 500 head, and Markbass CMD 121p.
I usually run one of the heads through either two 2x10 Markbass traveller cabs or a 2x10 and 115 traveller cab.
My problem is the amp cuts out or farts out if I am playing outdoors. I am running the gain and bass at noon and the master around 11:00 to noon.
The combo just shuts down if I am playing it and I have to turn it off and back on.
Any help would be appreciatted.

 

[BassmanPaul]

Are you saying that all of the amps cut out???

 

[RickenBoogie]

Yeah, same question- both amps do this(?) always using both cabs, and only 1 amp at a time(?)

 

[Russell L]

What's the VPF set on?

 

[brad70]

All three amps do it. The combo and Little Rocker are the worst. The VPF is set at 9:00.

 

[barrybass33]

Are you going below the 4ohm max.

 

[brad70]

No, either run one Markbass 8 ohm cab, or 2 Markbass 8 ohm cabs.

 

[brad70]

almost all the eq settings are 12:00 or a little lower

 

[musicman666]

Im not an expert but maybe there is something wrong with your speaker cab(s), speaker cables, power supply?

 

[brad70]

I checked all the cables and power supplies with 3 different types

 

[DWBass]

Does it happen at different locations? I'm inclined to say it's an ohm thing! Test your cabs to see if they are indeed both 8ohms. One could be incorrectly marked!

 

[ahc]

All from the same electrical outlet or does it happen on different ones? If it only happens on a specific outlet, then that outlet isn't providing the correct juice. One of those cheap plug-in outlet testers would confirm this.

 

[brad70]

I had been plugging into a power conditioner. It almost seems like it is trying to go into thermal shutdown

 

[christw]

Knob position is not indicative of how much power you're actually using. Are symptoms present with multiple instruments? Are any of them active basses? If so, do you use an onboard EQ on your bass? Do you use pedals/boosts?

I'd second the thermal shutdown thing if I knew more. Perhaps you're running it right at it's limit without knowing it?

 

[brad70]

I have all passive basses

 

[brad70]

Needless to say, I am about done with Markbass products

 

[rodl2005]

So if this is happening at various outdoor venues, I'd say u are pushing em to their limits- get more speaker area to obtain ur desired volume.
Outdoors sound disappears & it's easy to run outta headroom. Mark Bass are no slouch in the volume dept.

If it's only at one venue, check the power-try plugging amps directly into good power.
That it's happening to all 3 amps suggests that it ain't an amp fault.

 

[BassyBill]

Needless to say, I am about done with Markbass products

After buying two of their amps, three of their cabs and a combo?

 

[brad70]

I've not had problems with my Ampeg or Ashdown so I am not sure what the difference is with the Markbass. I bought the 2 heads around two years ago, and the combo last year. This is the first time I have had trouble with them.
I'm certainly not discounting user error, just curious why it started now.

 

[brad70]

I had the combo shut down at an indoor show. After i turned it off and back on it was fine. I had to do this 4 times.