Peavey pvi8500 How do you operate the Bluetooth, iPod feature

It does not have built-in phantom power. Phantom power is a method used to provide power to condenser microphones and other devices that require a small amount of power to operate.
It is important to note that the XR-600B have XLR inputs which are typically used for condenser microphones that require phantom power but it does not provide this feature. If you want to use a condenser microphone with the XR-600B, you'll need an external phantom power supply or an audio interface that provides phantom power.

Peavey R1080052 is a bass guitar model produced by the Peavey company. It is part of the company's Classic series of instruments, which are designed to offer vintage-inspired tones and aesthetics at an affordable price. The R1080052 features a solid ash body, a maple neck with a rosewood fingerboard, and two single-coil pickups. It also has a vintage-style bridge and a set of open-gear tuners. This bass is known for its warm, punchy sound and comfortable, easy-to-play feel.

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Peavey PV 118 Operating Manual Page 8

but you would have to go to Peavey direct for service info.

It depends on if this is a new problem on a previously working system , or if it's been going on since it was first plugged in, but geneally speaking it sounds like your impedance load is too low on the amp and it's overheating. I would double check that, but if the load is in line with the specs, it needs to go to the shop. Contact Peavey to get the autorized repair guy in your area, or you can send it to them to do inhouse repairs. They are reasonable and have access to all the needed parts, but you'd have to pay to ship it in and back.
https://peavey.com/support

headphone out put to 2 unused 1/4 in channel inputs,,

Sure you can, but that mixer amp is a mono amp instead of stereo. Head for radio shack and get an 1/8" stereo male phone jack to 1/4" female mono adaptor. Plug the adaper into the headphone output of your device. Then run a shielded cable with 1/4" mono phone plugs on both ends (like an electric guitar would use) from the device to one of the channels on the Peavey. Bring the volume up on both the channel and master on the amp up maybe 1/3 the way. Play a track on your device and adjust the devices out put as high as it will go with out distorting the channel input. Then adjust the amp's channel and main output as you would normally to get the final volume you need.

http://www.imarksweb.org/book/peavey+vypyr+15+manual+on+line/

Go to http://peavey.com/support/searchmanuals/archived.cfm Their main site also has info. DDT is an active compression feature to protect the product .

About the cable,

This is from peavey.com:

. Plus, the Generation guitars that feature ACM come with a dual-ended cable that sends the two tones to two different amplifiers, opening up even more tone possibilities.