Here is the list of feature on the Sony website about DAV-DZ820KW. I don’t understand more of the terms. I believe most people feel the same for specification of computer component.

• S-DIAT (Sony Digital Infrared rays Audio Transmission Technology) Wireless Surround Speakers, brings you the “non-compressed” and “no interfered” close-to-original digital sound
• Digital Cinema Auto Calibration – Silver Grade (DCAC) was developed by Sony to automatically measure and adjusts the speaker settings to your listening environment in a 30 second. The accuracy on speakers to the best listening position is within 2 cm – fast & accurate
• 7 kinds of Speaker Formations fit different sharp of the rooms and get the best surround sound effect
• Unique upgraded 32bit S-Master Full Digital Amplifier, delivers close-to-original sound quality and more powerful audio performance
• New Portable Audio Enhancer with Front Input enhances portable music enjoyment and make sound from portable audio clear and better
• Digital Cinema Sound (DCS) -Cinema Studio EX A/B/C
• HDMI Terminal Output , full digital audio and visual signals transmission, maintains the best Signal-to-Noise (S/N) level and ensures the perfect AV signal quality
• Incorporates Upscaling function by HDMI, the SD video signals 480i and 576i can be upgraded to HD video signals 720p and 1080i
• Power Output: 142Wx 5 + 180W x 1 + 130W x 2, Total 1150W(RMS 10% THD)
• Karaoke function with Microphone Input x 2
• Multi-channel Super Audio CD, Stereo Super Audio CD Playback
• DVD-Video, DVD-R, DVD-RW (VR/ Video Mode), DVD+R, DVD+RW, DVD+R DL (Dual Layer), VCD, CD, CD-R/RW, MP3, JPEG & DivX Playback
• A/V Sync function eliminates time-delay between picture and sound
• Decode Format: Dolby PRO LOGIC / Dolby PRO LOGIC II / Dolby Digital / DTS
• 12 bit / 108 MHz Video DAC
• Precision Cinema Progressive (NTSC/PAL)
• 30 Radio Stations Preset (FM 20/ AM10)
• Front / Surround Speaker:

  Floor Standing Design ; 2-Way Bass Reflex Speaker System ; 3 ohm Impedance

  Built-in 1 x 2.5cm Nano Fine Tweeter Unit and 7 x 10cm Bass Speaker Unit

  Speaker Cable Length: 5m (Front Speaker) ; 15m (Surround Speaker)

• Centre Speaker:

  Slim Design with DSP ; 1-Way Closed Box System ; 3 ohm Impedance

  Built-in 3 x 8cm Speaker Unit; Speaker Cable Length: 5m

• Subwoofer Speaker:

  Passive speaker design

  1-Way Bass Reflex Speaker System; 1.5 ohm Impedance

  Digital Direct Twin Drive (DDTD) Sub-woofer

  Built-in 16 cm Speaker Unit; Speaker Cable Length: 5m

• Input Terminals:

  Aution Calibration Microphone / Audio (Line In) / Microphone x 1

  Microphone x 1

  Optical x 1

  Coaxial x 1

  Composite x 1

  Audio x 1

• Output Terminals:

  HDMI x 1

  Component x 1

  S-Video x 1

  Composite x 1

• Dimensions (W x H x D) (mm)：

  Main Body: 430 x 55x 390

  Front Speaker with stand (Long): 280 x1200 x 280

  Centre Speaker: 380 x 47 x 61

  Rear Speaker with stand (Long): 280 x1200 x 280

  Subwoofer: 240 x 374 x 375

  Surround Amplifier: 280 x 280 x 60

• Weight (Kg)：

  Main Body: 4

  Front Speaker with stand (Long): 4

  Centre Speaker: 0.5

  Rear Speaker with stand (Long): 4

  Subwoofer: 6.7

  Surround Amplifier: 1.6 / 0.45