Quote:

Originally Posted by

**AndrewS99** /forum/post/15598888

Did you try audyssey.com?

http://www.audyssey.com/technology/multEQ_products.html

Yes. Again, the only information available is:

1. MultEQ XT (AVR version) uses "high resolution" filters for the satellites, while MultEQ uses "mid resolution" filters for the satellites.

2. MultEQ XT (AVR version) has 16x resolution in the satellites and MultEQ has 2x (I assume this makes MultEQ XT 8 times the resolution of MultEQ?)

3. "Control points" are distributed such that lower frequencies have higher resolution (does this mean that the points are distributed logarithmically within each channel? Or just that the resolution of the sub channel is higher than that of the satellites?)

4. In the graphing section it states that "it is necessary to use hundreds of points." I'm guessing this means that the best versions of Audyssey have hundreds of "control points."

So, beyond that there is no information about the satellite channel filters, which makes me a tad suspicious. I can imagine a few reasons why Audyssey would not reveal the actual number of sampling points for their filters:

1. It is a trade secret, and revealing the number of "control points" will aid their competitors (somehow I doubt this).

2. Audyssey has a policy of not disclosing technical information beyond what is available on their website (this is just silly).

3. Audyssey has an agreement with manufacturers that they will not disclose certain technical information (this is possible, although I imagine this would only apply to information that would hurt their image).

4. The resolution varies depending on the customer's setup (crossover freq, room response, etc.), and is not easily explained in layman's terms.

4. The number of "control points" in the satellite channels of the MultEQ and 2EQ products is low, and Audyssey is protecting their reputation by not releasing resolution information (This seems most likely to me. That being said, Audyssey seems to be pretty down to earth and I would also guess that the number of control points is sufficient in their lower end products, even if the number sounds low).

Now time for some wild speculation. Audyssey has a graph on their site (which may or may not be representative of their products) showing control points on a room FR plot:

http://www.audyssey.com/technology/g...ges/graph2.gif
Audyssey does not tell us what product we are looking at, but we can make some educated guesses. We know it's not 2eq, because there is low frequency information on the graph, so lets assume it's either MultEQ, MultEQ XT AVR or the MultEQ XT equalizer.

If we also assume the crossover frequency is a standard 80hz THX crossover, we can count 112 "control points" between 80hz and 20khz and we have the following possibilities.

1. The graph is MultEQ which gives the following satellite channel resolutions for the product line:

2EQ (1x) |

56 "control points" |

MultEQ (2x) |

112 "control points" |

MultEQ XT AVR (16x) |

896 "control points" |

MultEQ XT EQ (32x) |

1792 "control points" |

2. The graph is MultEQ XT AVR which gives the following satellite channel resolutions for the product line:

2EQ (1x) |

7 "control points" |

MultEQ (2x) |

14 "control points" |

MultEQ XT AVR (16x) |

112 "control points" |

MultEQ XT EQ (32x) |

224 "control points" |

3. The graph is MultEQ XT Equalizer which gives the following satellite channel resolutions for the product line:

2EQ (1x) |

3.5 "control points" |

MultEQ (2x) |

7 "control points" |

MultEQ XT AVR (16x) |

56 "control points" |

MultEQ XT EQ (32x) |

112 "control points" |

Option number one is out because Audyssey advertises "hundreds of control points." If was thousands, they would let you know (MultEQ XT amps would probably say 896 band equalizer on the front). Option number two also seems unlikely since a 3.5 band EQ is worthless, and 112 hardly qualifies as "hundreds."

So the most likely case is that 2EQ has ~7 control points, MultEQ has 14 control points, MultEQ XT AVR has 112 and MultEQ XT EQ has 224. This makes sense. These numbers are adequate, but don't sound fantastic and therefore are not advertised (eg, 2EQ sounds sexier than "7 point equalizer," which connotes low budget car stereo). Remember, this is just a guess based on a graph that may not be accurate.