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Possible problem with Little Mark II

R

rimtism123

Mar 25, 2009
225
5
Birmingham, AL
www.myspace.com
#1
During a gig on saturday, it kept cutting out. At first, I thought it was my Corvette, but after the gig, I plugged my bandmate's PRS in and it worked. When I got home..I plugged the Vette and the cables used that night at the gig and everything worked fine...

It wasn't running hot and it was still powered on..and it worked fine at practice just a few hours before.
There were fog machines...are they known to screw w/ amps?

Any ideas?

Gear used:
LMII 500w
Carvin 8-10"
Warwick Corvette STD Ash
Monster Cables
 
#2
Gotta ask the obvious I'm afraid, was the cab 4 ohms minimum?

Fog machine? Maybe fog was drawn into the head and stopped the heatsinks cooling as they should and causing the cutout to come into play. Complete guess though.
 
#3
Well the description of the cab said 4 ohms at 1200watts...
But the speakers say 300w 8ohms.
My GK Backline600 used to run it before it blew up...

Well I'm kinda thinkin the fog machine was a factor b/c the cab had to be on its side on the ground so the amp might be triggering an overheat or something if the fog went into the fan? But what gets me is that the amp was cold...:confused:
 
#4
Weak power, maybe?

BTW, don't put your 810 on its side. You just make the off-axis response even worse and all the mids and highs blow past your ears and make you play with too much treble. What's the use of having an 810 if you can't enjoy it?
 
#9
well I had to put it on its side b/c there was lack of space...it was a weird set up..and it was at a house party type setting so no stage.

but lack of power could be the problem..since it was a house party and everything was plugged with and around each other...amps..lights..etc..but the unit was still on..it was just silent
 
#13
It sounds like it's doing what the amp is supposed to...shutting itself down before damage is done. Why not go and replace it with another LMII if its still in warranty and you like the way it sounds.

I would check the ACTUAL Ω for your cab. It may say that it's 4Ω but that may not be the case. In which you'll only 'blow' more amps...which apparently has happened to you in the past.
 
#15
BassmanPaul said:
The same cabinet has caused problems for two different amplifiers. Your description of events sounds to me like your amplifier went into protection mode. I would suspect either an intermittent short in your speaker cable or in your cabinet. Were you using a 1/4" phone cable or a speakon?

Paul
Click to expand...

+1

The sound cutting out intermittently sounds like a shorted instrument cable. Had this problem last week, and after a song's worth of 'wait - did my bass just cut out for a bit?' I jiggled the cable ends on purpose to see it it came back, found that it did, and swapped it out for a good cable.
 
#16
I was using a 1/4" monster speaker cable. It wasn't the speaker cable b/c I switched them out thinking there was a short.

Wasn't the instrument cable..Checked everything when I got home. Def the amp.

I was thinking maybe the LMII maybe wasn't able to push my cab like that or just wasn't a good amp/cab match...thus shutting itself down...I went ahead and returned the LMII bought the M6 Carbine but haven't been able to test it at the 12 o'clock volume level the LM was at yet. So if the M6 drops out..its gotta be something with my cab.
 

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