Auto EQ and time alignment

[Jomukaiya1]

You miss out Alpine F1 which also has Auto Time alignment, Auto EQ and Auto Road EQ

 

Yes! Finally, someone who has an answer for my very first post in this thread! Thank you very much! Any other HU that has such features, and with good ipod interface?

[Konspire]

do u know how much they r selling their pioneer 8650?

[Maded]

Mate how much did you pay for the Alpine RUX-701 processor? if not convenient to say here can send me a PM? I'm also interested in this... did you also get the controller?

[Jomukaiya1]

You miss out Alpine F1 which also has Auto Time alignment, Auto EQ and Auto Road EQ [/reply]

The Alpine F#1 is their top-of-the-line component audio range. High $thousands. This is way out of my budget. Looks like it's still only Pioneer that has auto time alignment and auto EQ for their high-end integrated HU.

[Knighthunter]

Alpine F1 and Pioneer Carrozeira ODR, is the same class and not cheap. It's a true high end model, look at wheel asia last edition there is ICE supplement on honda Edix using this Pioneer ODR system.

Edited March 23, 2006 by Knighthunter

[Slonez]

I really like the auto EQ and time alignment features in some of the Pioneer HUs. Do other ICE brands have these features? I did some reasearch and did not find these on Alpine and Clarion.

 

I had the Eclipse 8455 & it had the auto tuning feature. On top of that, you can log in to their web site & fine tune the perimeters, save it onto the memory stick & upload it to the HU.

[Hyun]

taking a poll here. for those of u using auto TA, no matter what brand:

 

sometimes, when you alter your speaker positioning, have you encountered the auto programme giving u strange numbers for the TA? e.g. front left speaker value is like 300+cm and front right, say, 100 cm? (large difference between the two)

 

i suspect it's due to the difficulty detecting the TA perhaps due to many reflections from that speaker angle within the car cabin. any thoughts?

[User12343]

dun expect the auto TA to work wonders. they are not good in providing pinpoint accuracy. at best they can get close, but never accurate

 

having said that, the mic provided only provides a single listening point. we are born with a pair of ears with 2 listening points, not one

 

those measurements are simply too clinical, measuring the time-delay they arrive at the mic.

 

nothing beats the human tuning.

Edited June 23, 2006 by User12343

[Slonez]

Hyun,

 

You cannot take the distance you see from the HU as absolute, their software probably uses some sort of logarithm that only makes sense to them. No need to freak out.

Either that or the mic cannot detect a clear direct sound from the speakers maybe because of placement, reflection,etc.. so you get this odd reading. If this is the case then the TA would not be very accurate anyway & you should be able to tell from your listening position.

If your auto TA give you solid center imaging, then no need to bother too much about the reading

[Hyun]

yup the auto thing is quite an approximation. i was just wondering if there was anything to be learnt about strange values. PERHAPS the algorithm is trying to tell u there is some form of cancellation, etc, that you need to realign speaker POSITION or something ...

[User12343]

based on the limited intelligence of the auto TA, it is trying to tell u some nonsense values tat can be deduced.

 

cancellation or augmentation of the in-cabin response can be determined using dedicated real-time analyzers.

 

imho, dun bother with the auto thingy, for a given pricetag of sub-1k HUs, how much intelligence can the HU incorporate? even those highend H90x alpine processors that cost a few grand oso like tat, pple trust the auto thingy to get the best possible SQ during iasca/amma competition?

Edited June 23, 2006 by User12343

[Hyun]

this RTA thing is indeed something interesting, to be used as a baseline for further adjustment. and i understand that it's possible for a simple laptop computer equipped with some software and a good microphone to be able to do our DIY RTA.

 

i wonder if any bros here have DIY'ed in this manner, and are interested in sharing their experience? perhaps teach us how to go about buying such a software or microphone etc ...

 

it seems to be something that's worth learning, not to follow blindly, but as a basis for helping "teach" our ear differences when we have the visual aid to show us the differences. cos currently, i try to EQ by first turning up that band to the max, to hear which frequency is being affected, then turning to the minimum, to hear how it's lost, and try to decide on a point that's suitable. but this final decision seems to be too subjective ...

[Bosebani]

>>based on the limited intelligence of the auto TA, it is trying to tell u some nonsense values tat can be deduced.

 

cancellation or augmentation of the in-cabin response can be determined using dedicated real-time analyzers.

 

imho, dun bother with the auto thingy, for a given pricetag of sub-1k HUs, how much intelligence can the HU incorporate? even those highend H90x alpine processors that cost a few grand oso like tat, pple trust the auto thingy to get the best possible SQ during iasca/amma competition? >>

 

 

 

 

 

 

Well Said!

 

I also no trust my H9xx alpine processor auto TA