[Solved] Boston Acoustics BA735 not working under GA-EX58-UD3R/Win7

May be a problem with HDA vs. AC97 front panel detect selection - if you have an AC97: "The front panel audio header supports HD audio by default. If your chassis provides an AC'97 front panel audio module, refer to the instructions on how to activate AC'97 functionality via the audio software in Chapter 5, Configuring 2/4/5.1/7.1-Channel Audio." I know this can cause trouble, as I cut off the 'extra' (I thought) AC97 connector in my case, and after much struggling, discovered that one of the 'detect' grounds was made 'through' a pin connection on the AC97 header that then made the HDA malfunction...

Try this:
http://www.mediafire.com/?sharekey [...] b9a8902bda
It's rev 6.0.1.5864, verified against both 7RC (x86&x64) and 7RTM (x86&x64); the HD connector is preferable... I'll look up the front panel side of the connector - I think it's pin 4 that has to be pulled low (to pins 2, 6, & 10), but I want to double check - I'm an old fart, and my memory is not as dependable as it once was!

OK, after trying at least a half dozen of the advices found on the internet regarding using "conection issues" with the BA735, none of them which worked for me, I finally found the best "HI-FI" solution being, first, changing the ANALOG generic sound card in my NEW PC to a more powerfull Creative Solutions card (Blaster XI Titanium...US99.00) which offers the kind of sound frequency range response you want to hear out of your BA735's anyway. Besides having several Analog output channles, the X-Fi has an Optical (Toslink) output which you can use to drive your Digital Speakers to their max clean performance.
You will therefore need an Optical (Toslink) to Digital (coax) converter between the card and the speakers along with the corresponding Optical cable. I picked up both these (converter and Toslink cable)at monoprice.com (Converter PN 2948; Optical Cable PN 2763...US10.00). Other than the above, you'll need a simple RCA cable between the converter and the speaker's woofer digital input which can be pieked up at Radio Shack. The driver for the card comes with the product, you don't need any special setup once you install the card software, it does it automatically. The converter does not need any drivers whatsoever, it is simply used to allow the compatability between the components.
This may sound complicated, but it isn't, you'll thank me once you start enjoying the sound coming out of these absolutely great pair of "old"speakers. It's unfortunate PC manufacturers don;t equip their new PS's with these 200.00 sound beauties. Good luck!