Check continuity on all cables, try a different cabinet with the head and a different head with the cabinet and the bass with a different rig to see which part of the chain isn't working, make sure the volume controls are turned up on both the amp and bass. Once the problem is narrowed down it will be easier to advise you.
The problem seems to be with the tour 700.
If the amp is lighting up, make sure the mute switch is in the out position (you'd be surprized how many times it's not). Try plugging into the Aux in or the Effects Return on the rear to see if the problem is in the preamp section or power amp section. Past that, I'm afraid it's time for a trip to the repair shop.
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SOURCE: run a sub woofer to a peavey board
I would recommend using a separate active crossover such as the Peavey 23XO and a separate amp for your subs.
SOURCE: Peavey Bravo 112 hums and has less poast gain volume
Try checking to make sure that all the tubes are properly seated in the tube sockets and that one wasn't broken at the base. Considering that you just bought it you should be able to take it back and have it serviced for free.
SOURCE: peavey cirrus pickups
VIsit Peavey's website at http://www.peavey.com contact their customer support and you can order a wiring diagram on how these pickups should be wired. I've always been able to get any diagram I've needed for any of their products, some times you have to pay for them but sometimes they can be downloaded for free.
SOURCE: Peavey 115 Low hum Low volume from input
The preamp section has a problem. It could be anything in the preamp but is OFTEN the input jack itself. They take a lot of abuse.
Also the insert jack contacts that forward the preamp to the power amp if no external FX are used can go bad.
Additional things are circuit board cracks caused by rough handling and also controls that have had the knobs mashed in which can destroy the potentiometers they are connected to.
SOURCE: My bass guitar wont connect to my amp.
Assuming that the amplifier is functioning properly, I suspect that the problem is either in the cord, the plug socket on the bass, or the volume control potentiometer. First, I would try another cord that is known to be in good condition (ALWAYS plug the cord into the instrument FIRST). Second, carefully remove the cord receptacle plug from the bass and examine the solder joints (check for loose wires). Third, carefully remove the plate that holds the volume and tone pots. Examine these controls for loose wires or faulty solder joints. CAUTION: If solder joints are found to be the culprit, care must be taken to correct this problem. If too much heat enters the pot, it can be ruined!
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