I am designing and building an all in one system where the htpc is combined media server, surround sound preamp, and electronic crossover. I wish to find out if anyone else is interested in such a concept and welcome any suggestions, criticisms, etc. that other members might have of my current system and plans for a future system.\n\nMy current system is -\n\n Projector: Optoma HD-25e\n Screen: Elite Screens Sable Frame Series, 120-inch Diagonal 16:9, Fixed Frame Projection Screen (ER120WH1)\n\n Loudspeakers:\n Main Speakers: Craver Original Amazing Speakers\n Center Speaker: Klipsch RC-62 II\n Rear Speakers: B&W 600i\n Subwoofer: Dayton Audio 18" Reference Series HO Subwoofer, Cabinet, and SPA 1000 plate amplifier\n\n Amplififers:\n L and R: Emotiva XPR-2\n C: Dayton Audio APA150\n RL and RR: Adcom GFA 5300\n\n Pre-Amp: Emotiva UMC-200\n\n A\/V Sources:\n PC (Ubuntu 14.04)\n Hardware -\n Asus M4A88T-M\n AMD Phenom II X4 965 cpu\n 8 Gb memory\n Samsung 850 Pro 256GB 2.5-Inch SATA III Internal SSD (MZ-7KE256BW)(system drive)\n Pioneer Electronics USA Internal Blu-Ray Writer (BDR-209DBK)\n EVGA GeForce GT 740 2GB GDDR5\n Ceton Infini TV 6 pcie turner card (Verizon Fios)\n Asus Xonar D2 sound card (currently not being used)\n Ortek Media Center MCE PC Remote Control and Infrared Receiver VRC-1100 (only using reciever)\n\n Software -\n Myth TV 0.27 backend\n Kodi 16.0 beta frontend (media player)\n Video Files\n Audio Files\n CD's\n DVD's\n Blu Rays (Play Commercial blu rays using Makemkv plugin for Kodi)\n Live and Recorded TV (pvr myth tv plugin)\n\n Remote: Iogear wireless keyboard with integral trackball.\n Logitec Harmony 1100\n\nMainly because of the need to use dsp electronic crossovers with minimal adc-dac conversions for a new main speaker system\n\nhttp:\/\/www.parts-express.com\/audio-artistry-cbt36k-line-array-speaker-pair-kit--301-980\n\nI would eliminate the Emotiva UMC-200 preamp and combine the room equalization and electronic crossover functions in software and a quality sound card (Asus Xonar D2).\n\nCurrently I envision no more than a 5.1 channel system with the new main speakers (Don Keele CBT's) biamplified so the single 7.1 channel sound card will suffice. If more channels are requires, either for 7.1 operation or for more crossover channels multiple sound cards could be used.\n\nAdditionally, the analog line-in of the sound card would be used for legacy analog stereo souces (I have a turntable with line level output and an open reel tape deck).\n\nThe main deficiences of such a system would be and inability to play SACD media and to tune any TV channel (I have Verizon Fios) with the CCI flag set. The CCI flag problem is due to that I am running Ubuntu with the Mythtv backend. On a windows system Kodi can use the Windows Media Center as a live TV video backend and would not have this problem.\n\nThe main problem I face in developing such a system is implementing the electronic crossover in software in a way that I can route the audio output of Kodi to the software (Kodi does not have a command line option for redirecting audio output). Since Kodi allows one to select any attached sound card as the audio output I can use the alsa loopback virtual sound card for the Kodi output and route the input to the loopback virtual sound card to the jack audio server and ecasound to implement the required filters. \n\nAs soon as I can implement and test the software for the electronic crossover I would purchase the CBT speakers.\n\nThe Kodi team is developing an audio dsp module for Kodi that will be able to equalize the room response (not automatically, REW probably needed).\n\nWhen I change the main speakers I would also add a second subwoofer (same components as the first)\n\nhttp:\/\/www.parts-express.com\/dayton-audio-18-reference-series-ho-subwoofer-and-cabinet-bundle--300-7094\n\nplus the plate amplifier\n\nhttp:\/\/www.parts-express.com\/dayton-audio-spa1000-1000w-subwoofer-plate-amplifier--300-809\n\nThe one other component I would need for the system is a 150W per channel (stereo) into 4 Ohms amplifier\nto drive the tweeter sections of the CBT speakers (the bass\/midrange section would be driven by the\nEmotiva XPR-2). Any suggestions would be appreciated. Note since the amplifier is directly driving the\ntweeters a quite turnon with very low dc offset is needed.\n\nA final other upgrade would be to replace the Xonar D2 with a Xonar Essence STX II 7.1 - 124dB SNR Audio Card \/ MUSES op-amps\n\nhttp:\/\/www.amazon.com\/ASUS-Essence-STX-II-7-1\/dp\/B00KTFJ0Z2\/ref=pd_sim_sbs_147_3?ie=UTF8&refRID=1YGFB833F06YMSDZNGYX\n\nor use an external USB dac (again suggestions would be welcome).