[Beisofmarko]

Hey, this have been bothering me awhile.

I have Jehnert Flatline 3way front + helix match pp82dsp with Technic harness.
My speakers starts to distort pretty easy wh sameen turning volume up, they play around volume as Base system did before they start to distort.

They sound really nice but have to keep volume so low...

What could be causing this distort and bad quality?

6spdcoupe helped me to set up Low and highpasses last year so those are good for sure. But i have not touched EQ or anything else on pp82dsp, could this make difference?

I have Gains on amp at 0 for each channel except +2 at underseats.

Jehnerts at door are connected right to the old OEM wires (those thin ones)
I have crossovers there but i just wanted to point out that no new wires on doors.

or is 55wats per channel too low and that makes it distort so early?


I had on my e36 focal k2 power 130KR 5-1/4 front with audison amp 75watts per channel and they played like 3-4 times louder without any distortion..
and good quality aswell.. so i dont think jehnerts being "flatline" should make so big difference. So i have something probably wrong and need to add something.

I'd like to be able listen music louder and with good quality so any tips are
greatly appreciated!

edit: I'm also playing music from phone thru AUX cable as i dont have USB port but.. ?

[kaigoss69]

Sounds like it could be the gains are not set properly.

Originally Posted by Beisofmarko

Hey, this have been bothering me awhile.

I have Jehnert Flatline 3way front + helix match pp82dsp with Technic harness.
My speakers starts to distort pretty easy wh sameen turning volume up, they play around volume as Base system did before they start to distort.

They sound really nice but have to keep volume so low...

What could be causing this distort and bad quality?

6spdcoupe helped me to set up Low and highpasses last year so those are good for sure. But i have not touched EQ or anything else on pp82dsp, could this make difference?

I have Gains on amp at 0 for each channel except +2 at underseats.

Jehnerts at door are connected right to the old OEM wires (those thin ones)
I have crossovers there but i just wanted to point out that no new wires on doors.

or is 55wats per channel too low and that makes it distort so early?


I had on my e36 focal k2 power 130KR 5-1/4 front with audison amp 75watts per channel and they played like 3-4 times louder without any distortion..
and good quality aswell.. so i dont think jehnerts being "flatline" should make so big difference. So i have something probably wrong and need to add something.

I'd like to be able listen music louder and with good quality so any tips are
greatly appreciated!

edit: I'm also playing music from phone thru AUX cable as i dont have USB port but.. ?

[Fundguy1]

Or maybe they are out of phase.

[jeffb335]

Its not the speakers. Gain is wrong somewhere, probably at the amp from what you just described.

To test, turn up the amp gain a bit and note that the system will go louder without distortion, if so, then your gain setup is wrong. Start over.

[Stream]

Use high pass filter for underseats ~ 60hz 12-24 db/oct
Use high pass filter for midranges ~180hz 24db/oct.

[Fundguy1]

Yeah, could be a bad crossover setup too.

[kaigoss69]

Originally Posted by Fundguy1

Yeah, could be a bad crossover setup too.

Doubt it, if 6spdcoupe helped him set the crossovers previously. Sounds like this unit is not one that came "preloaded" with all the right settings, like the ones from Bimmertech. In the end it is a fairly complicated DSP, with amplification, and the DSP part requires proper set-up and tuning (by an expert).

[ctuna]

[Beisofmarko]

Thanks for all replies!

I just tested adjusting more gain from the amp and front distortion still starts
around same volume level. If i have volume turned up all the way from phone
headunit and i set underseats gain over 2db they start to sound like they are
"hitting the bottom" or how its called.

Also noticed that i get this static noise front door speakers / tweeters constantly
When i mute front A / B channels its gone.

I took some pictures of my crossover settings as i do not have fully
understanding on these so maybe some of you get more out of these than i do
I was given these settings to get started with by 6spdcoupe (Thanks!)
(allthough i have allready tweaked some of the settings so if theres
something totally wrong, point at me )

Here is the 2 front channels that go inside door panels where i installed jehnert crossovers for mids and tweeters.


And here 2 channels that goes straight to underseat subs (HP is set to 60hz now)


Rear channels are muted since i have oem speakers there and only 1 of them works so i just muted them.

[ctuna]

Do you have the Technic 4/6 Harness?
or one of the other two.
You need the 4/6 to run each channel independently
I believe.
Underseats should be low passed at more like 180.
Or bandpassed if you have a real sub.
Jehnerts under seats are not subs they are suppose to give you some
midbass and midrange.

those pictures are pretty bad do you know how to do screen
shots from microsoft paint.

Also I notice that Bimmertech does a recode to Hi Fi for this
particular unit for the base system. The implications of them doing this says it
may distort with speaker level inputs.

[Beisofmarko]

Originally Posted by ctuna

Do you have the Technic 4/6 Harness?
or one of the other two.
You need the 4/6 to run each channel independently
I believe.
Underseats should be low passed at more like 180.
Jehnerts are not subs they are suppose to give you some
midbass and midrange.

Yeah i have technic 4/6 harness.

Other than that does the setting look good?

Also yeah, i'm not sure why i had them on 40hz but now i raised to 60hz as told.
I have a different subwoofer from my old car that i'd like to add later but
i need to get front fixed and to play louder before adding it since it would
be overkill for now and after all im after sound quality

[Beisofmarko]

Originally Posted by ctuna

those pictures are pretty bad do you know how to do screen
shots from microsoft paint.

Pictures are taken from laptop screen with phone, i did not have internet connection avaible there to upload from laptop. And yeah they are bad

[ctuna]

Jehnerts should be low passed at around 180
for the underseats they are not subs.

Did you have a recode to Hi Fi ?
If you didn't have a recode
does that amp have high level inputs ?
Do you have it connected to those?

Reread comments in last post as I edited them.

[Beisofmarko]

Originally Posted by ctuna

Jehnerts should be low passed at around 180
for the underseats they are not subs.

Did you have a recode to Hi Fi ?
If you didn't have a recode
does that amp have high level inputs ?
Do you have it connected to those?

Reread comments in last post as I edited them.

I have not recoded to Hi Fi.
Far as i understood i have high level inputs
and i do not need to recode to hifi, i understood this amp accepts that
"curved" signal and fixes it?

I'll change underseats low pass to 180hz from 170hz tomorrow, but that
won't fix my problem so still looking for ideas.

How does the crossovers inside door panels work? since i have set from the amp
to them high pass to 165hz and lowpass to 16Khz, does that automatically
feed right amounts to 4" mids and tweeters? just for my own information.

If anyone happen to have Jehnerts installed with pp82dsp, would be awesome if you could maybe share your tune!

[ctuna]

If you are not running active
The standard thing is to low pass the floors and high pass the doors
and not band pass anything .
If you are really running active with a channel to each tweeter and no
passive cross over in the door then you bandpass the mid and high pass
the tweeter.
At least that is the way I understand it.
The manual says it takes high level inputs but Bimmertech sells there
base unit with a recode to high fi . I wonder why.

[GATORB8]

If you are setting your gains with your input maxed, you're doing it wrong. Max HU volume is already distorting.

Set HU at 2/3 and try again.

There's something else wrong if your setting your gains at max HU and then it distorts at 1/3 though.

On the screen next to each of the crossover settings, it says bypass. That's not selected, is it?

Also, your underseat screen shows the channels are selected as the front center.

[Beisofmarko]

Originally Posted by GATORB8

If you are setting your gains with your input maxed, you're doing it wrong. Max HU volume is already distorting.

Set HU at 2/3 and try again.

There's something else wrong if your setting your gains at max HU and then it distorts at 1/3 though.

On the screen next to each of the crossover settings, it says bypass. That's not selected, is it?

Also, your underseat screen shows the channels are selected as the front center.

Underseats are connected to center channels yes, thats the way technic harness connects it on my case.

Bypasses are NOT selected on any channels.

I have 0.25db gain from amp to 4" mids / tweeters and 2db gain to underseats, with those settings if i turn volume max from the phone and HU
it distorts, i need to tap steering wheel volume button 2-3 times down to get
rid off distortion. So should i keep HU around 2/3 and add gains from amp? or did i understood it wrong?

[kaigoss69]

OMG get professional help.

[GATORB8]

Originally Posted by Beisofmarko

Underseats are connected to center channels yes, thats the way technic harness connects it on my case.

Bypasses are NOT selected on any channels.

I have 0.25db gain from amp to 4" mids / tweeters and 2db gain to underseats, with those settings if i turn volume max from the phone and HU
it distorts, i need to tap steering wheel volume button 2-3 times down to get
rid off distortion. So should i keep HU around 2/3 and add gains from amp? or did i understood it wrong?

Yes, you need to feed the amp a clean signal. Max volume is not a clean signal.

[ctuna]

I know Technic is fond of center channels but
his 4/6 harness description does not list center channels
as a feature . And even if you run a seprate channel
to the dash does the 82dsp support channel mixing for
a center channel.(I thought I read it didn't)
If you are feeding your source tones through the crummy
aux input it could be part of the problem)

[6spdcoupe]

When did you change to V3 ? Those xover points do not look right at all my friend. I just looked through my emails and yes, completely different from what I sent you. But, what I sent you was in V2 so somewhere along with your change is where you lost it.

[Beisofmarko]

Originally Posted by 6spdcoupe

When did you change to V3 ? Those xover points do not look right at all my friend. I just looked through my emails and yes, completely different from what I sent you. But, what I sent you was in V2 so somewhere along with your change is where you lost it.

I just checked email and sigh..
seems like i have 2 tunes with allmost similar names on computer and i have loaded the wrong one.
Your tune indeed has very different crossover points
Can't remember why i changed to V3 but..

Anyway gonna load your tune tomorrow and see, only one question that wonders me
You have set crossover points on channels E & F (underseats) differently, on purpose?
E highpass 50hz lowpass 250hz
F highpass 41hz lowpass 739hz ?

Other than that, thanks again!

And last question, do i need to find someone to recode my car to Hi Fi or not with this amp?
Will it improve clarity of sound and so on?