WHAT WE TEST
THX engineers complete hundreds of different scientifically-formulated tests to ensure the highest audio visual standards possible. Key tests in this program are as follows:
Power output is tested to ensure the receiver accurately plays source material at THX Reference Level in every input and mode and at every sampling rate for all possible playback combinations selected by the listener.
THX has strict requirements for frequency response to ensure that you hear all the details in high-resolution tracks, ensures dialog in movies, and vocals in music are clear while maintaining deep, impactful bass output that doesn’t overpower the listening experience.
THX tests the signal-to-noise ratio to ensure the unit is designed to have low noise performance with very little to no audible hiss from the speakers.
THX requires an 80Hz crossover point in the setup menu to ensure proper bass management in every THX Certified AVR. This setting confirms that the subwoofer handles low frequencies, freeing up the loudspeakers to handle mids and highs.
AV Receiver Features
THX LOUDNESS PLUS
THX Loudness Plus™ is a volume control technology featured in THX Certified Dominus, THX Certified Ultra and THX Certified Select AV Receivers, and preamplifiers that automatically adjusts the front-to-back speaker level relationship as you turn the volume down. With THX Loudness Plus, home theater audiences can now experience the rich details of surround sound at any volume level.
BOUNDARY GAIN COMPENSATION
Sitting near a wall may result in increased acoustic levels at the lower frequencies. BGC corrects the way low frequency sound is perceived when seated near a wall. This results in a more accurate bass response.
Your ears hear different tonal qualities in sounds coming from different directions. Timbre Matching restores the frequency balance between your front and surround speakers ensuring seamless and smooth panning between the front to back of the room.
Many movie soundtracks are mixed in studios for playback in large cinema auditoriums with an array of speakers. When played on home systems, they may appear abrasive and edgy. Re-EQ establishes a more accurate tonal balance when enjoying movies in your home.
THX Certified Listening Modes
Featured on all THX Certified AV Receivers, THX Listening Modes make it convenient to have one speaker set up for movies, music and games.
THX CINEMA MODE
Recreates the ambiance of the movie theater by optimizing the audio to submerse you in the movie’s soundtrack.
THX GAME MODE
Distributes the sound effects and dialogue generated by the game engine by placing the audio from the mix to the appropriate “action” location – creating 360-degree gaming experience.
THX MUSIC MODE
Emulates the original studio environment for an increased sense of spaciousness and localization – placing you directly in the recording session.
THX SURROUND EX
Decodes the third surround channel from the traditional two surround channels to create a more immersive entertainment experience.
THX CERTIFIED PERFORMANCE CLASSES
THX Certified Compact products for smaller sized rooms, up to 1,000 cubic feet in size, with an ~8 foot viewing distance from the screen.
THX Certified Select products are for medium-sized rooms, up to 2,000 cubic feet in size, with a ~10 foot viewing distance from the screen.
THX Certified Ultra products bring the cinematic experience to larger home theaters, up to 3,000 cubic feet in size, with a viewing distance of ~12 feet from the screen.
THX Certified Dominus products are for expansive home theater spaces, up to 6,500 cubic feet in size, with a ~20 foot viewing distance from the screen.