integra 5.1

Hello all. this is my first post so I will try to keep it short and sweet.

the setup:

Power Acoustik 700MHR LCD monitor fed by

Blaupunkt ME-3 DVD player running digital Coax out and composite video out to:

Audiobahn ADD51T decoding the 5.1 signal and sending to

Audiovox 200 watt 4ch amp driving fronts/tweeters (Audiobahn AS65)

Sony Xplod  250 2ch amp driving rear 6x9's (audiobahn AS69Q)

all units grounded to chassis. remote wire jumped between all units from acc+12 on fuse panel

power to:

monitor provided by old HU wiring harness

dvd player direct from battery

5.1 decoder direct from battery

Audiovox amp from constant  +12 on  fuse panel

sony amp direct from battery

PROBLEM:

rear speakers emit high pitched tone only when engine on (doesnt matter if music is playing or not).

tone raises in pitch and volume with accelerator pedal.

noise cuts out when clutch is pressed.

this is REALLY wizing me off it sounds like a little turbo or something - REALLY ANNOYING!

please help. glad to answer any more questins about my setup let me know!

update in case anyone cares:

Whine was directly linked to the video running through my Audiobahn Decoder. I removed the interconnects, and ran the video direct from the blaupunkt to monitor. sucks though because I wanted to use the audiobahn to switch video. anyone have any ideas why this may have happened?