Mackie 1400i users

I bought a used Mackie 1400i power amp, and it seemed to work fine, but i think their maybe something wrong with it. I have a Peavey Pro 410 (700watts, 8 ohms) and a 1x15 w/ an Eminence Legend (300watts, 8ohms). I am using a Peavy RAXX Preamp.

The problem is that whenever i try to push the amp loud i get the internal short light coming on when i peak out. I was wondering if any of you guys have had this problem?

I have tried it in a couple of different modes:

Bridged at 4ohms, Both Cabs
Bridged at 8ohms, Peavey Pro
Mono at 8ohms, Peavey Pro
Mono at 4ohms, Both cabs

the mono at 4ohms gives me the most volume. I am wondering if their could be a problem with my amp, or if i am just trying to push it to hard.

 

early morning bump

 

i was just wondering if your speakers are pushed to hard whether or not this would happen?.

i am running the attenuation knob almost at full tilt.

 

i think may have figured it out. It comes on when i am pushing my speakers to hard, or when their impedence is around or below 2 ohms. also i think it was because i was running a +3 volt signal into it and the spread sheet says input sensitivity is 1.23 volts. maximum input is around 10 volts though.

the internal short is to protect the power amp from blowing from a direct short, and to protect my speakers from frying. i ordered an avatar b212 neo, so i think i will be ok to run it at near full power


I play with a LOUD guitarist :scowl:

 

well my two cabs would only be running at 4 ohms, in bridged mode it is said to be acceptable.

it running fine right now in stereo mode at 8 ohms (300 watts)
I am running stereo with my 800rb running my other 8 ohm cab. Next week i will be getting another 8 ohm cab, and i will see if that cab will work better at running the 1400i at 4 ohms bridged. i need my 1500 watts