Topic: ta tuning

[Tohsan]

ya me also like to know about it too.

[nghooipeng]

tumpang thread abit. when you guys say imaging not centre, where is your centre? the driver side dashboard? or the centre of the dash board?

The sound stage should be from dashboard left until right. So the centre also should be at the centre of dashboard. Due to the right speaker more closed to driver seat. So in most of system, the centre goes right in front of driver seat.

[cykosis]

ok...lets make it simple...which one is important...correct me if im wrong

1. head unit
2. driver
3. amp
4. power cable + rca cable + speaker cable
5. caps
6. voltage stabilizer

I think you left out the AC passives bro. Should be slotted between no 3 & 4. Even before the driver cos with a good set of passives, even not so high end driver will perform well

[built]

I think you left out the AC passives bro. Should be slotted between no 3 & 4. Even before the driver cos with a good set of passives, even not so high end driver will perform well

what is AC?

[mnkh27]

Duh, read my signature. 

[bbmeasurement]

hello all

car : satria

For ur info im running  passive

be4 this im using 9813, ta was tuned at 1.2 for FR nd the vocal is right on the middle of the air cond blower (amp gain set at 9 oclock). Then, changed to 9835 and found that the voice is not in the middle (a little bit right side), when i changed my FR to 1.4 the vocal is ok.. but i found that the sub bass is on the left side.. can u guys xplain...n tell me what should i do


Subwoofer placement is on the right side ( ta tuning set at SR 1.5)

u better measure your TA cause TA is an exact point, nor a tuning point.
1. can measure with rule.
2. with impulse response


mic position


subwoofer measurement (impulse respond)


measurement of midbass in the door panel. look at the yellow line its mean the target of the ta (sub impulse response)
thats mean the midbass in the door is to close to mic/ear and must be delayed.


the midbass in the door was delay to same line with sub woofer

do it to other speakers
an test together



if right u get one line same impulse response

[wengweng]

u better measure your TA cause TA is an exact point, nor a tuning point.

You mentioned TA is an exact point. So, from the picture I notice the following :

1. You cannot move your head while driving and listening to songs
2. You listen with only 1 ear
3. You drive with your ear pointing to the windscreen
4. From the picture of the mic position, you are rather a short man. The TA is out if another man with different height sit in your car

hehehe, just joking. Thanks for sharing.....

[built]

you are really mean... 

[bbmeasurement]

You mentioned TA is an exact point. So, from the picture I notice the following :

1. You cannot move your head while driving and listening to songs
2. You listen with only 1 ear
3. You drive with your ear pointing to the windscreen
4. From the picture of the mic position, you are rather a short man. The TA is out if another man with different height sit in your car

hehehe, just joking. Thanks for sharing.....

1. the different distance or TA around the mic is small, so still can move head lah...
2. if use 2 mic/ 2 ear its will have two point so more difficult.
3. the mic is omnidirectional.
4. same as number 1.

 hehehe, you're welcome

[roy77]

Anyone here using Alpine CDA-9855, would like to tune my TA, x-over, i currently running :

FR1.1 ms  and FL 2.3ms

havent actually listen well to it yet....

[roy77]

Was going through my 9855 bible and got this :

Conditions:
Farthest Speaker – listening position : 2.25 m (88-9/16")
Front left speaker – listening position : 0.5 m (19-11/16")
Calculation: L = 2.25 m – 0.5 m = 1.75 m (68-7/8")
Time correction = 1.75 ÷ 343*1  1000 = 5.1 (ms)

*1  Speed of sound: 343 m/s (765 mph) at 20°C

Well in that case if car temperature is higher then 20 Celsius, the settings is not applicable as speed of sound is different (but this makes very minimum changes)
Also the above calculation is on left hand drive basis...

For those who actually do not use rear speaker.. u only need to TA the FL speaker...

[built]

some actually prefer to listen to music up close...
like on the stage with the artist. will TA be of
any good then?

[roy77]

TA setting is just to make the sound reach yr ears the same time... i do not think it will make u feel like u are with the artist on stage... for that different equipment matters already...

[cacin]

Was going through my 9855 bible and got this :

Conditions:
Farthest Speaker – listening position : 2.25 m (88-9/16")
Front left speaker – listening position : 0.5 m (19-11/16")
Calculation: L = 2.25 m – 0.5 m = 1.75 m (68-7/8")
Time correction = 1.75 ÷ 343*1  1000 = 5.1 (ms)

*1  Speed of sound: 343 m/s (765 mph) at 20°C

Well in that case if car temperature is higher then 20 Celsius, the settings is not applicable as speed of sound is different (but this makes very minimum changes)
Also the above calculation is on left hand drive basis...

For those who actually do not use rear speaker.. u only need to TA the FL speaker...

If you don't use rear speakers, but run the speakers active, how does the calculation differs?
If you use the I-personalize feature, what kind of delay is it actually showing? All seats?

[Audiophiliac]

If you don't use rear speakers, but run the speakers active, how does the calculation differs?
If you use the I-personalize feature, what kind of delay is it actually showing? All seats?

If temperature is the case; set the AC to maintain climate control to 20 degree C then; Just to ask.. is it would bring any audible different on the speed of sound differences effected on the temperature differential ?