7.2 Ch. Sony Muteki STR-KM7 specs

The Sony Muteki STR-KM7 AV receiver has been around for quite some time and party lovers like it because it delivers on power just as promised. For a full review click here while for a full system specification, continue reading.

Amplifier specifications:

• 7.2 Channel Analog Amplifier; Total power output - 2012W RMS (6 Ohms, 1kHz, 10% THD)
• Stereo Output mode(6 ohms, 1kHz, 1%THD), Output (L+R, 120W + 120W)
• Surround mode output (6 ohms, 1kHz, 10% THD), Output FL/FR /C/SR/SL/SBR/SBL = 216W. Subwoofer (4 ohms, 100Hz, 10%THD), SW = 250W.
• 4 Sound fields (Movie, Game, Music) and without lock.
• Falcon 1.1 DSP
• Bass and Treble equalizer (+/- 6dB)
• Speaker level (dBm) control; +/- 10 for Centre, Subwoofer and Surround speakers, L+1 to 8/R+1 to 8 or BALANCE for Front speakers.

Decoding formats:

• LPCM (2Ch, 5.1Ch, 7.2Ch) through HDMI
• Dolby Prologic II
• Dolby Dual mono
• 96kHz/24bit PCM
• DTS 96/24
• Dolby Digital
• Dolby TrueHD 
• HD Digital Cinema Sound

Inputs and outputs:

• Analog Audio in/out : 5/1
• Optical digital in/out: 2/0
• Coaxial in/out : 1/0
• Component video in/out: 2/1
• Composite video in/out: 2/1
• HDMI in/out: 3/1

 

Sensitivity

• Inputs

Analog: 800 mV/50k ohms
Digital (Coaxial) Impedance: 75 ohms

• Outputs

Analog Audio out: 800 mV/1k ohms

• Tone

Gain levels +/- 6 dB, 1 dB step

• Frequency Response

28Hz - 20k Hz        

Video features:

• A/V Sync
• 1080p HDMI Quality and 1080/24p
• HDMI Quality - 3D pass through and 3D over HDMI
• HDMI Quality - HDMI pass through
• HDMI Quality - Audio Return Channel (ARC)
• LPCM for HD surround from Blu-ray Disc.
• HDMI Quality - Deep colour/x.v.Color

Video specs

• Video In/Out level: 1 Vp-p, 75 ohms
• Component Video In/Out level: [Y: 1Vp-p, 75 ohms], [PB: 0.7Vp-p, 75 ohms], [PR: 0.7Vp-p, 75 ohms], 80MHz HD Pass through.

Tuner and general specs:

• FM/AM mode, Station name input, Direct/Auto tuning, Preset channel tuning
• Sleep timer(up to 2hrs), Auto standby, Union jack display
• Power requirements; 110-120V or 230-240V, 50-60Hz, 185W depending on region
• Power consumption standby: 0.3W
• USB Playback option located at the front of the system unit.

Speaker system:

• The HT-M7 home theater system is supplied with 9 speaker unit; 1 Centre(CN), 2 Front speakers (FR/FL), 2 Surround Back, (SBR/SBL), 2 Surround speakers (SR/SL) and 2 Subwoofers (SW).
• Bass reflex Front, surround, Subwoofer and centre speaker system.
• Metallic cone speaker system,
• Magnetically shielded speakers
• Subwoofer system: 250mm cone type
• Speaker weight: Front R/L -15kgs, Centre - 3.3kgs, Surround R/L -13kgs, SBL/SBR - 2.4kgs, Subwoofer(SW) - 8.5kgs 

Buying tips

• This muteki KM7 is very loud and is suitable for large room installations. The acoustics of a large room make the KM7 sound much better with minimal discernible sound distortions even when it is not properly sound calibrated. If you live in a rented neighborhood be careful about having late night parties for you might be thrown out by your landlord! 

• The STR-KM7 is very bulky; 9 speakers in total plus a AV receiver unit weighing almost 100kgs in total. It is not an appropriate choice for a small room because it requires a huge space and it may not be very pleasing to have speakers scattered allover the place.

• The KM7 is essentially an AV receiver supplied with speakers. To make it complete you need AV sources such as the Blu-ray/DVD/CD/MP3 Disc players, portable HDD players,  FTV/FTA satellite receivers, Gaming consoles, USB devices etc. 

•  The KM7 amplifier is rated at 10% THD, which is quite high. Sound distortions become very vivid if you listen to sound from a low quality source. The result can actually be very discomforting to the ears. A cumbersome solution would be to manually recalibrate the speaker output. The best solution though is to always use high quality AV sources to ensure the amplifier outputs high quality sound as well.