ONKYO ht-s680 Manuel D'Instructions

4

• The subwoofer cabinet is made out of wood and is 

therefore sensitive to extreme temperatures and 
humidity, do not put it in locations subject to direct 
sunlight or in humid places, such as near an air condi-
tioner, humidifier, bathroom, or kitchen.

• Do not put water or other liquids close to the speakers. 

If liquid is spilled over the speakers, the drive units 
may be damaged.

• Speakers should only be placed on sturdy, flat surfaces 

that are free from vibration. Putting them on uneven or 
unstable surfaces, where they may fall and cause dam-
age, will affect the sound quality.

• Subwoofer is designed to be used in the upright verti-

cal position only. Do not use it in the horizontal or 
tilted position.

• If the unit is used near a turntable or CD player, howl-

ing or slipping of sound may occur. To prevent this, 
move the unit away from the turntable or CD player 
otherwise lower the unit’s output level.

TVs and computer monitors are magnetically sensitive 
devices and as such are likely to suffer discoloration or 
picture distortion when conventional speakers are 
placed nearby. To prevent this, the SKF-330F and 
SKC-330C feature internal magnetic shielding. In some 
situations, however, discoloration may still be an issue, 
in which case you should turn off your TV or monitor, 
wait 15 to 30 minutes, and then turn it back on again. 
This normally activates the degaussing function, which 
neutralizes the magnetic field, thereby removing any 
discoloration effects. If discoloration problems persist, 
try moving the speakers away from your TV or monitor. 
Note that discoloration can also be caused by a magnet 
or demagnetizing tool that’s too close to your TV or 
monitor.
Do not place SKM-330 and SKB-330 close to TV or a 
computer monitor because they have no magnetic shield.

The speakers can handle the specified input power when 
used for normal music reproduction. If any of the fol-
lowing signals are fed to them, even if the input power is 
within the specified rating, excessive current may flow 
in the speaker coils, causing burning or wire breakage:
1. Interstation noise from an untuned FM radio.
2. Sound from fast-forwarding a cassette tape.
3. High-pitched sounds generated by an oscillator, 

electronic musical instrument, and so on.

4. Amplifier oscillation.
5. Special test tones from audio test CDs and so on.
6. Thumps and clicks caused by connecting or discon-

necting audio cables (Always turn off your amplifier 
before connecting or disconnecting cables.)

7. Microphone feedback.

• 6-channel amplifier
• 100 watts per channel min. RMS at 8 

Ω, 2 channels 

driven from 1 kHz with no more than 0.9% total har-
monic distortion

• WRAT (Wide Range Amplifier Technology)
• Optimum gain volume circuitry
• OptiResponse™ Equalizer (OR-EQ™)

*1

 function

• Dolby

*2

 Digital EX and Dolby Pro Logic IIx

• DTS, DTS-ES Matrix/Discrete, and DTS Neo:6 pro-

cessing

*3

• Cinema Filter function
• Linear PCM 192 kHz/24-bit D/A converters on all 

channels

• Powerful and highly accurate 32-bit DSP Processing

• Adjustable crossover (60, 80, 100, 120, 150 Hz)
• 3 S-Video inputs, 2 outputs
• 2 assignable digital inputs (1 optical, 1 coaxial)
• Subwoofer pre out
• Color-coded multichannel input for use with Super 

Audio CD and DVD-Audio

• A/B speaker drive
• Color-coded speaker terminal

• 30 FM/AM presets
• FM/AM auto tuning
• RDS (Radio Data System) (Europe only)

• Remote controller can be used to control Onkyo CD, 

CDR, MD components, and cassette tape deck

• Color-coded speaker terminals and speaker cables
• 3-1/8" (8 cm) cone woofer
• Ceramic tweeter

• Built-in 150 watts power amplifier
• 8" cone woofer
• Auto Standby/On

*1. OptiResponse and OR-EQ are trademarks of Onkyo Cor-

poration.

*2. Manufactured under license from Dolby Laboratories. 

“Dolby”, “Pro Logic” and the double-D symbol are regis-
tered trademarks of Dolby Laboratories.

*3. “DTS” and “Neo:6” are trademarks of Digital Theater Sys-

tems, Inc.