I started a similar upgrade but have not finished. I am going all 12v
so it is more complicated than just using 110v components. If you are going with 110v, I can help start you in the right direction.
- As you say, HDMI carries the surround audio. It can be "daisy-chained". So feed your HDMI signal into your TV or Bluray, and then run a cable to your audio system from the HDMI-Out on your TV or Bluray. Your set may also have digital audio out or other format that you audio system accepts.
- My conclusion is that Airstream factory speaker layout (2 front, 2 rear) is not conducive to surround sound but is OK for stereo audio. The speakers just above one's head, in the dinette area are less than ideal for rear speaker surround placement. The bedroom speakers are too far away and blocked, making them less than ideal as "front" surround speakers.
- The factory subwoofer is decent but is far from "subtle" bass and uses a lot of power (if designing a 12v
- Placing a proper surround speaker setup in the main cabin can be done, but would be a challenge to make it non-obtrusive in the well designed Airstream interior. Unlike cars and home theater, rear surround speaker placement is especially hard given the seating in the Airstream. Placing a home surround sound amplifier out of sight is also a challenge.
- A single compact,
powered Dolby soundbar placed under the TV, with decent bass, is a good solution. These simulate surround sound very effectively with electronic processing. Power and a cable from the audio output of your TV is all the wiring they need.
ZVOX Audio SoundBase 320 | ZVOX Audio
This has a wireless subwoofer.
Boston Acoustics TVee Model 2 (Black) Powered stereo sound bar with wireless woofer at Crutchfield.com
There may even be a Dolby sound bar made for your TV set depending upon the brand.
- Also, for another option look over the owners manual on you factory Sony deck. Most of them have a menu option buried somewhere that does surround sound simulation if a dolby signal is fed into the aux audio input. If your deck has that option, the Sony will create effective surround sound through the factory installed speakers (the front speakers however will still be in the bedroom). To use this, your xBox would need an audio out with Dolby or you can by a box to split the audio out of the HDMI before you send it to the TV set.
- Not sure what you mean by a ground cable. Tricky grounding situations can occur with 12v systems
creating hum, but there are cheap filters for that.
- Do not know much about x-Box but this dolby decoder may come in handy. Amazon.com: DTS AC3 Digital Audio Decoder 6x RCA for Microsoft XBOX360 PS2 PS3: Video Games