Hello, I have a new Onkyo TX-RZ840 that I was able to upgrade to when my older/simpler unit had a warranty issue. This unit has its AccuEQ Advance program with 9 listening positions. I have searched and searched, and I cannot find very much information on what AccuEQ advanced does outside of the web page here and the information below.
http://accueq.onkyousa.com/ Which some of this is useful and some is marketing. I am looking for more technical details and some guidance on setup.
For instance:
You get nine positions with the mic, but outside of the main listening position MLP or #1, there is no guidance on where to place the mic in different situations. There is no minimum or maximum distance spec from other mic positions or MLP? If you only care about the MLP Chair, do you move the mic around it spaced 12" apart? or what? What if you have a couch or other setup, what is recommended? Additional useful help might be, don’t place it in a position next to a wall? (I only have the MLP, which is centered in the room)
What about speaker distance measurement, it nails all of my speakers but my SUB. For the SUB, it always inserts the max distance of 30'. I have placed it in several locations in the front, side, and back and it always picks 30'. I currently have it 9' behind me under the Left Surround due to room configuration.
For levels using REW, I can see it gets those dead on also, a little heavy on the sub, but still very accurate.
For crossover points, it is not very consistent and not sure how it is making its choice. My surround speakers are small bookshelf, and it selects 40Hz? My towers it picked 40Hz, Center 80Hz, heights 100Hz, Sub 120Hz
Any suggestions or help is appreciated
My Setup is in my main living room (22'Lx12'Wx8'H)
Onkyo TX-RZ840
Polk Audio RT16 towers L/R
Polk Audio SC350-LS C
Polk Audio M3 II Surround
ELAC Debut 2.0 DA42 Atmos
Klipsch R-10SWi Sub
http://accueq.onkyousa.com/
AccuEQ calibration technology reveals the true potential of your speakers by eliminating standing waves from your listening space. These acoustic peaks distort the audio image and prevent your loudspeakers from voicing the sound as their designers intended. AccuEQ lets you experience the whole sonic picture without changing your speaker system’s unique personality.
AccuEQ is a room acoustic calibration solution featured on select Onkyo A/V receivers. It fine-tunes every speaker in your home theater, even if they are not symmetrically placed, creating a harmonious sound-field in your movie room. The receiver analyzes data and calibrates audio response to optimize speaker performance in unique listening environments. Your speakers work together to form a cohesive and spatially seamless soundstage. Directional sounds are convincing, bass is taut, and details resolve clearly. AccuEQ unifies the sonic picture so your audience is comfortably immersed in the movie soundtrack.
How AccuEQ Works
First Round Measurements
- DISTANCE & SOUND PRESSURE LEVEL CALIBRATION
- First-round measurements set the distance, sound pressure level, and crossover of your speakers. Distance and level calibration ensure all channels are treated equally.
- CROSSOVER CALIBRATION
- Crossover measurement selects the correct point to roll off low-frequency sound to the subwoofer for seamless speaker integration.
Second Round Measurements
- ROOM ACOUSTIC CORRECTION
- In the second round of measurements, your room’s sonic characteristics are evaluated. Using this information, AccuEQ is able to prevent standing waves from forming by adjusting frequency response.
AccuEQ ADVANCE
Onkyo’s Premium Multipoint Room Acoustic Calibration Solution
- Add paragAccuEQ Advance is Onkyo’s premier room acoustic calibration technology. It’s featured on A/V receivers capable of theater-reference sound. In addition to the AccuEQ fundamentals, such as speaker presence, distance, SP levels, and crossover, it supports multipoint microphone measurement to detect the presence of standing waves, and sophisticated equalization technology to remove them from your room. AccuEQ Advance is also the only room acoustic solution that listens and compensates for subtle background noise (such as the hum of an HVAC) to ensure a higher degree of measurement precision.
Detection and Elimination of Standing Waves
- Standing waves are soundwaves of the same frequency that don’t move spatially, creating acoustic peaks in areas of your room that have a significant impact on audio reproduction quality. They result from sounds reflecting off parallel surfaces of walls, floor, and ceiling, and they affect our perception of sound, sucking the dynamism and punch from bass. AccuEQ Advance employs multipoint microphone measurement to map out a detailed picture of frequency interactions within your room. Using this data, equalization is applied to eliminate standing waves. With unwanted peaks removed from the room, sound springs clearly into focus, dynamic, musical, and true to the source.
Standing Waves Explained
- Standing waves occur when sound waves of the same frequency collide, creating acoustic peaks in certain areas of your room. They are a result of sound reflecting from parallel wall surfaces and the floor and ceiling.
- Standing waves distort your perception of sound, meaning you don’t hear “the real thing.” Acoustic treatment panels can be used to absorb these peaks but can be expensive and not practical for everyone.
- AccuEQ does the same job without the cost or inconvenience.
AccuReflex™ Phase-Matching Solution for Dolby Atmos®-enabled Systems
- Dolby Atmos-enabled Onkyo A/V receivers include AccuReflex technology as part of the AccuEQ or AccuEQ Advance suites. AccuReflex optimizes the reproduction quality of object-based audio soundtracks played though Dolby Atmos-enabled front speakers, Dolby Atmos-enabled upward-firing modules, or in-ceiling speakers. If these are not properly calibrated, the resulting sound-field can lack cohesion and be discomforting to hear. This is because frequencies in the high-directional bandwidth are perceived as reflected sound from the ceiling, while frequencies in the low-directional band are not. To resolve phase-shift arising from this path difference, AccuReflex technology calibrates the phase of sounds originating from Dolby Atmos-enabled speakers so they integrate with your floor speakers. Along with improved localization, a 3D field with vertical movement and overhead dimensionality is produced, letting you enjoy harmonious object-based sound just as the film creators intended.
Onkyo's Original Approach to Room Correction
- AccuEQ is not just about room acoustic equalization. The technology allows your speakers to perform just as they did when you fell in love with them at the showroom.
- As a speaker manufacturer with almost 70 years' experience, our research revealed a way to eliminate standing waves while still preserving the speaker’s signature sound: Partial Band Equalization.
- The harmonic characteristics that give a singer’s voice its soul, or a piano its personality occur in the very high-frequency range. AccuEQ only corrects frequency response below a certain point, leaving high-order harmonics untouched. Your speakers are free to reproduce the emotion in the recording faithfully and naturally.
- Speaker Vs. Room Characteristics
- Speakers are generally measured and tuned in an acoustically “dead” chamber, free from unwanted echoes and standing waves. However, in the real world, every room suffers from echoes that can interact with and change the levels of certain frequencies due to the effect of standing waves.
- Speaker & Room Interaction Tuned
- The combination of speaker tuning and the acoustic properties of your room changes how your speakers should actually sound. AccuEQ eliminates standing waves so the speaker sounds as the designer intended. Higher frequencies are untouched. The speaker voices the recording’s emotion with a unique personality.
- Customization and Memory Presets
- While AccuEQ fulfills the task of correcting your room’s acoustics so your equipment reaches its fullest potential, it’s true that everyone has different tastes when it comes to sound. We, therefore, include three memory presets you can use to save your own customized EQ settings, perhaps tailored to suit different content such as movies, music, or games.
- Clear the Air
- The behavior of sound will always vary from room to room, and how we enjoy it from person to person. However, everyone wants his or her equipment to work to its maximum potential. This is what AccuEQ successfully achieves: it “clears the air” so that every drop of vitality and life in the signal shines through untouched. AccuEQ—experience the difference for yourself today.
