I have recently purchased a an XLS1000 amplifier. If the speakers (Peavey Hisys 2) are connected and the amplifier then switched on, an error code is displayed (LEDs sequenced in red and displayed the code) I cannot remember the code as I switched off immeadiately fearing damage to the amp. If the amp is switched on and the speakers then connected all seems ok and has got me through 2 x 6 hours gigs with no problems. I am using the Jacks as inputs. Thanks Pete Bracey.

Grill cloth can be found on line, try Ebay too.

The Peavey CS4080HZ is intended to place 2,040 watts
per channel into four-Ohm-rated speaker
impedances. The "HZ" suffix is intended
to state the amplifier has a relatively high
impedance output and is optimized for no
lower than four-Ohm loads. Are you strapping in Bridged or Stereo Mode? Bridged Mono Operation
Both amplifier channels can be bridged together to make a very powerful single-channel monaural amplifier. Use
extreme caution when operating in the bridged mode; potentially lethal voltage may be present at the output
terminals. To bridge the amplifier, depress the rear panel Bridge switch to the IN position. Direct the signal to channel
A's input and connect the speakers across the hot outputs (the "+" binding posts) of channels A and B. Only channel
A's input attenuator is active while in Bridge Mono mode. Both connectors are strapped together, so either connector
can be used with a patch cable to drive the input of another amplifier.
Unlike the stereo mode, in which one side of each output is at ground, both sides are hot in bridged mode. Channel A's
side is the same polarity as its input with the minimum nominal load impedance being 4 ohms (equivalent to driving
both channels at 2 ohms) in bridged mode. Driving bridged loads of less than 4 ohms will activate the DDT
circuitry, resulting in a loss of power, and may also cause a thermal (overheating) overload.
Therefore, check the impedance of the cabs for each mode. Remember, if you connect two individual speakers in Parallel (+ to + and - to -) you cut the impedance in half. Two 8 ohm speakers in parallel now have a load of 4 ohms. Series connection + to - to + to -, will double the impedance. Two 8 ohm speakers will have a load of 16 ohms.
I have actually taken a two speaker cab with a 4 ohm impedance and opened up the back to re-do the wiring. I rechecked the impedance with a ohm meter. So yes, be careful. Whatever you do, keep the speaker lengths as short as possible. Buy really good speaker wire or if you make your own, go with 10 gauge wire.

Suspect that the pot is broken, or start cleaning all the back switches, this pv amps suffer from a terrible switch quality.

These cabinets are self contained and you do not use a crossover with them. The speakers do NOT come out to separate connectors. You just drive these with an amplifier. DO PAY ATTENTION to the power rating... you are safe using an amplifier with a MAXIMUM of 150 Watts RMS per speaker cabinet. More than that and running them loud and you will be replacing the speakers. These will cover a 40 foot square room at comfortable level.

To pjstokes.I have exactly the same set up as you and have experienced the same problem. So far I have Changed The Bulbs inside the tops and also replaced the thermal fuses on the soundguard circuits (which are inside the 6XT tops) but still have the problem. Only when the cabs are driven hard do they stop working, no problems at low volume. Peavey don't have a solution. I think maybe some of the other components have blown but I don't know which ones. If anyone knows a solution please post it here.

Check the devices (for the faulty channel) located on the heatsink.

Hi...
That 28V RMS means how many RMS volts max comes out of the speaker terminals.
As long as your speakers can handle a couple hundred watts , youre fine.

The correct order is Mixer>EQ>Compressor>Crossover>Amps>Speaker. Here is the link that helped me out. Scott's PA System Tutorial

you mean a series connection, I'm assuming that you are connecting two speakers to one channnel (the right or left ) of the stereo. you take the positive and the negative leads and you put one on one speaker and the ohter on ther other speaker, positive (+) to positive (+) and negative (-) to negative(-). then you simply connect the 2 leftover connection of the speakers together with a wire. Be carefull though becaus if you do it wrong, it could short out your stereo or it will sound really bad...