hi maella. Yes, I have had the same problems with responses from Krell. I think they are very busy sometimes. You just have to keep on them and keep calling if you want a response. Krell has their own "Flashloader" software that will upgrade the firmware using a normal RS232 serial cable (NOT a NULL MODEM cable). Firmware is specific to the serial number of the unit as there are many versions of firmware for the S1200 / S1200U / S1200U-3D.
Actually, all the above problems I have documented were fixed by a DSP board replacement. I think the problems may have been bugs or bad components in the original "Gen 1" version of the DSP board, as several others have documented the same problems on their S1200 units.
Your unit has the Gen 1
Dual DSP board, which can no longer me made because the DSP IC’s were
discontinued by the manufacture. This forced us to do some minor redesign work
to the Dual DSP board, thus creating the Gen 2 Dual DSP board. This will work
fine for your application but will require new faceplate software to be loaded up
into the unit after the install.
That was one of the responses I got back from Krell. I think your best bet is to fill out a Service Request form and send your S1200 in for repair. I would specifically request the installation of the Gen 2 DSP board. Actually, once I did a service RMA request and sent the unit it, it was fixed pretty quickly. Right now, the service department might be backed up because I have another friend who has been waiting about 4 weeks for his Krell preamp to be repaired.
http://www.krellonline.com/service-request-form.html
My Krell S1200U was still under warranty, so they did not charge me for the Gen 2 board. I don't know what the cost would be if you had to buy it. I think it could potentially be a couple thousand dollars.
