I have two of these systems (cheapies for other part of the house and one in garage, main HT is Onkyo with Celestion speakers and Marquee 8500). Never had a real problem with them other than upgrading the fans. The purepath digital is nice... and sounds a lot better with some decent Klipsch 8ohm speakers (but not really loud). The std speakers stink. Single driver, fake tweeter, but then again, they were still in the original box where I found them earlier today, which caused all this in the first place! hehe.
I decided to fiddle with the HTIB for more than 5 minutes, I remembered there was an audio delay using the optical (and maybe coax) digital inputs. After a couple hours of searching while bored, I found a post pointing me to the "way back machine" website.
Also found a post by "Kevin Schaefer" on another site, and it looks like he has the firmware, and upgrade procedures all compiled into one ZIP file (via google cache before that too disappeared, and wayback).
I have yet to try it, as I found it 5 min ago, and it's late, but I thought I would post it here. If you get to it before I do, please post your results. I have two to mess up, and don't really care if they are gone, just doing it for fun.http://www.kevinschaefer.net/upgrade.zip
(please read last part of post before attempting)
I also found the user manual if anyone needs that. These units are nice for the money, and with any decent small speakers and average volume levels, sound good too (with powered sub). The stupid audio delay thing kept me from using it in the 2nd HDTV setup (it still only comes through the TV speakers
. Supposedly this fixes or comes close to fixing the delay.
I have a KS4190, I'll post results tommorow... maybe. A file in the ZIP leads me to believe that it works with all three listed at the top of this post, but don't blame me if your HTIB needs to be buried 6ft deep after doing so.
There also might be an issue with VIDEO out after the upgrade, it MIGHT switch to component only, so if you don't have it hooked up via component, make sure you can from another input/tv if this happens.
**** PS: FROM WHAT I HAVE READ
, once you upgrade the firmware from disc.... NEVER
put that disc back in the KOSS, otherwise it wipes the flash clean... forever. Courtesy "swami" from another website. ****