IIRC my RX-V2500 uses a -10 setting for its reference level calibration. On every THX Certified AV Receiver the “0” on the volume dial represents THX Reference Level, the exact volume level used by the moviemakers and sound artists in the studio. I know my amp output is not 1 DBv. The THX 0 dB reference level is a calibrated volume setting used in dubbing, cinema, and home theaters. By using our site, you consent to cookies. To ensure the audio products reach this peak performance THX developed a set of standards as part of its THX Dominus, THX Ultra, THX Select, and Integrated System certifications. I guess what I am really having trouble with is the diffrence between absolute power (volume) and Relative (gain). The THX 0 dB value is relative to the calibrated pink noise 85 dBC SPL value. Loudness Plus automatically and seamlessly compensates for the tonal and spatial shifts that occur when the volume level is reduced. I have a Pioneer SC-35 which is THX-II certified but that doesn't mean anything if my speakers arent. By using our site, you consent to cookies. -15db for movies are pretty much the standard, only with some older cd mixes do I get close to -5db. Reference level is a calibrated volume setting used for both movie production (in dubbing stages and post production houses) and reproduction (in screening rooms and theaters). Reference level is set by adjusting the gain of the audio amplifier(s) so that, when the amplifier level scale reads “0 dB”, an electrical level of 20 dB below maximum digital level (-20 dB FS) produces a sound pressure level of 85 dB SPL at the listening position. Achieving the THX Reference Level is no simple task for receivers or loudspeakers. I been researching this also and you did shed a lot of light on it. THX.com uses cookies to provide and improve our services. DB to figure out power out of your amp, where a 3 DB increase is double the power. I guess the problem is why directors/sound engineers choose such high levels that the standard can't be followed. The 0 dB (decibel) setting represents an average 85 dB SPL (sound pressure level). Please click the "I Accept" button. Your amplifier's gain value is arbitrary and it is just a means to achieve the THX SPL reference level. The Yamaha's YPAO should calibrate to reference level (note the volume control setting it uses). Great blog topic, Cheers. THX Loudness Plus maintains the integrity of soundtracks when listening below Reference Level (0 db on the volume dial for THX Certified Receivers is equal to the studio Reference Level). Delivers rich high-fidelity audio experiences in the car or home at any listening level, Uses multi-channel spectral balancing to adjust the level and frequency response to counter the perceived loss of low and high frequencies at lower volumes, Surround sound channel processing preserves the spatial detail lost as you lower the volume, Automatically shapes the output on surround channels to maintain the perceived balance in the original mix. Using that (-10 setting) gives me 85 dB SPL average with 105 dB peak SPL. Please click the "I Accept" button. Movie soundtracks are created and mixed in dubbing theaters. What is ‘THX Reference Level’? When calibrated, -22 dB is the calibrated "reference level" setting on the master volume control. Not necesarily regarding THX, just in general. Hello The DUde. I was looking on the net to find the reference level for my home theatre and this blog was very informative. From what I read it is 1 watt. On every THX Certified AV Receiver the “0” on the volume dial represents THX Reference Level, the exact volume level used by the moviemakers and sound artists in the studio. By increasing the levels of the ambient sound, you experience the true high-fidelity audio of movies, music and games at any volume. Some receivers calibrate "reference level" to be the 0 dB setting on the master volume control, and others do not do so. Thank you!!! My non THX receiver uses 0 dB on the master volume to indicate full volume, nothing higher in level. It is sad that specs are not followed by the theatres. This is assuming you use the little YPAO cal mike that came with the AVR. Am I getting the DBv and SPL mixed up here? How can you use Ref. Everyone's setup is different and this is the whole reason for calibration. Hello DUde. Loudness Plus automatically and seamlessly compensates for the tonal and spatial shifts that occur when the volume level … THX Loudness Plus maintains the integrity of soundtracks when listening below Reference Level (0 db on the volume dial for THX Certified Receivers is equal to the studio Reference Level). Movies are presented and played back in cinema and home theaters. THX Certified Audio products are designed to let you experience movies the way they were meant to be heard. I too wanted to know what the reference level equated to and how that applys to home theater equipment. THX.com uses cookies to provide and improve our services. Thanks so much EricEverthing I have read said it is relative, but not what is was relative to.obviously not all recordings (music or movies) are the same, because I listen to (music especially) above 0dB (out from amp)Thanks again. It requires a tremendous amount of power to drive an audio system effortlessly without clipping or distorting.

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