Adjusting amplifier

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Alfaholic
Posts: 437
Joined: Fri Nov 14, 2014 11:23 am
Location: Norway.Karmøy

Adjusting amplifier

Post by Alfaholic »

Hi, i got my amplifier today(PG sd500.4) and i need help adjusting it.
I got an Audison voce AV K6 component speaker and im going to bridge the amp, here is what i need help adjusting:

1: The amp got HPF and full and i wonder what position i should have it in, it got lpf to but thats for subwoofers right?

2: The frequency its from 40Hz to 400HZ, as i am a total novice i dont even know what it does realy, i think it got something to do with the freq to the speakers thats about it.

3: There are also an adjusting knob wit bass boost, i know what it does but should i use it?

The frequency response on the component speakers is 50Hz-22k, let me know if you need any moore info on the speakers.
zpa0.5(V210245)
zpa0.3(00618)
zx600ti x2
600titanium
zx400ti
sd500.4
XSC5 x2
pld1
sdt-ti
tba
bass cube
tld66
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Renovatio
Posts: 138
Joined: Thu Oct 02, 2014 1:21 pm
Location: Norway

Re: Adjusting amplifier

Post by Renovatio »

you need to read a lot of diymobileaufio forums, you will find everything there...or if you dont want to do this, tha just go to local audio shop, where they do that, they will adjust gains on the amps and lpf and hpf on the cd player and other functions.
Sounds like music...
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twisted
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Re: Adjusting amplifier

Post by twisted »

the HP filter will be for your door speakers. depending on your speakers i would start at around 80hz HP and adjust higher or lower to yours and your speakers liking.
i like to overlap my lp filter for my sub a little higher to help blend my sub with my mids.so if i cross my highs in at say 70hz i cross my sub at around 85hz so it has a nice blend to overlap and cover any frequency gaps. but the HP filter revmoes the low frequencys from your door speakers
i try to not use bass boost if at all possible, if you do use it use as little as possible.
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dwnrodeo
Posts: 1932
Joined: Thu Nov 01, 2007 10:35 am
Location: MI

Re: Adjusting amplifier

Post by dwnrodeo »

Alfaholic wrote:Hi, i got my amplifier today(PG sd500.4) and i need help adjusting it.
I got an Audison voce AV K6 component speaker and im going to bridge the amp, here is what i need help adjusting:

1: The amp got HPF and full and i wonder what position i should have it in, it got lpf to but thats for subwoofers right?

2: The frequency its from 40Hz to 400HZ, as i am a total novice i dont even know what it does realy, i think it got something to do with the freq to the speakers thats about it.

3: There are also an adjusting knob wit bass boost, i know what it does but should i use it?

The frequency response on the component speakers is 50Hz-22k, let me know if you need any moore info on the speakers.
1. Leave the amp HPF since this will filter out the frequencies that are too low for your speakers.
2. I would start by following these steps:

"Amp Adjustment (Multiple Amps)1.
If you have multiple amps disconnect all the RCA’s except the
ones connected to the amp that is powering your front speakers.
2. Set all of your controls on your radio fl at (0 bass, 0 treble, etc.).
Set the high-pass crossover on the amp (if variable) to around
100 Hz (120 Hz for small speakers 4” etc.).
3. Turn the gain all the way down on your amp, turn your stereo on
at this point. Your speakers should be making very minimal sound.
4. Turn your stereo to it’s maximum volume, but avoid clipping/
distorting your speakers.
5. Now back the stereo’s volume to just about 1/16 – 1/8 less than max.
6. Turn the gain on your amp up at this point until you start to hear
clipping/distortion and then back it down just a little, like you did
the volume on your radio.
7. Now you adjust your crossover (if variable) to a lower frequency,
going lower than 60 Hz is not recommended for most speakers.
Keep listening for the distortion when you start to hear it turn the
crossover back up a little.
8. If you have an amp for your rear speakers repeat steps 1-7 on
the rear amp. Once you do this make sure you reconnect the front
amp listen to see how well the amp/speakers balance adjust the
rear amp gain down until you can just barely hear that there are
rear speakers, this will help provide a better sound stage.
9. Now if you have a sub amp you’ll need to repeat steps 2-6 keep
the other amps connected, keep in mind this is a sub amp so
replace high-pass with low-pass and the recommended range is
60-80 Hz (up to 120 Hz for 8”), once you have completed steps
2-6 adjust the volume on your stereo and see if the sounds stay
balanced from high to low volume in most cases you’ll have too
much or too little sub adjust the gain accordingly and try again.
10. When you have all amps running listen for a loss of bass/midbass,
from when it is one amp or the other. If so please check
the section on phasing when you fi nish your adjustments.
Phasing
This is a critical part of sound quality that is rarely if ever touched
on in any tech sheets or installation notes. In a vehicle there are
multiple angles and materials in the interior. What does this mean,
this means although your speakers may be electrically in phase
they may not be acoustically in phase. Crossover’s will also affect
phasing between speakers especially in component sets. You
can buy an expensive time alignment device but unless you are a
serious competitor this may not be needed. To do the next steps
you’ll need to be in a fairly quiet area and you’ll need to have your
radio adjusted to a good listening level, with a very dynamic song
that you are familiar with.
1. Disconnect your sub-amp signal, play your front and rear
speakers together and listen closely to the music.
2. Switch your rear speaker leads (not the power but the signal leads
going from the amp to the speakers themselves) electrically out of
phase, meaning + to – and – to +. Listen closely to your music again.
3. If you have more mid-bass leave the wires switched if you have
less switch them back
4. Reconnect your sub-amp signal, listen closely to your music again.
5. Unplug the wires going to your sub enclosure and plug them
back in electrically out of phase. Listen closely to your music to
see if you have more or less mid-bass. If you have more leave
it, if you have less switch it back.
The above steps are suggestions and not necessarily a cure for
any problem but you may fi nd that it can make a big difference.
You can change the electrical phasing on any one speaker and
notice a difference good or bad, but it is typically recommended
to do in pairs. From my experience you’ll see the best results
when switching the phase on tweeters in a set of components
that are mounted more than 6 inches apart."

3. Don't touch the bass boost knob!
XS2300, XS2500, XS2300, X200.4, X100.2, Ti21000.4, Roadster 66

I'm gonna become a civil engineer. I'm gonna design septic tanks for playgrounds. Little kids can take shits! You idiot, what the hell do you do?
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Alfaholic
Posts: 437
Joined: Fri Nov 14, 2014 11:23 am
Location: Norway.Karmøy

Re: Adjusting amplifier

Post by Alfaholic »

Thanks for the help guys, im going to go print out that post dwnrodeo and follow all the steps.
Im only using speakers in the front for now, my sub is an active 10" but im going to buy an SD600,1 amp and build a box for my trunk when im done with the front speakers.
I can adjust the Hz on the rca out on my headunit should i leave this setting off and do all the adjusting on the amplifier?.
zpa0.5(V210245)
zpa0.3(00618)
zx600ti x2
600titanium
zx400ti
sd500.4
XSC5 x2
pld1
sdt-ti
tba
bass cube
tld66
User avatar
dwnrodeo
Posts: 1932
Joined: Thu Nov 01, 2007 10:35 am
Location: MI

Re: Adjusting amplifier

Post by dwnrodeo »

Alfaholic wrote:Thanks for the help guys, im going to go print out that post dwnrodeo and follow all the steps.
Im only using speakers in the front for now, my sub is an active 10" but im going to buy an SD600,1 amp and build a box for my trunk when im done with the front speakers.
I can adjust the Hz on the rca out on my headunit should i leave this setting off and do all the adjusting on the amplifier?.
You can use either the amplifier or the headunit. I personally like to use the headunit to adjust the crossover frequency/slope so I can listen to the changes while in the drivers seat and compare the differences immediately. If you choose to go that route, just make sure your HPF is set to the lowest frequency (40hz) on your amplifier. It's all about what's easier for you while tuning and what sounds best to you in the end.
XS2300, XS2500, XS2300, X200.4, X100.2, Ti21000.4, Roadster 66

I'm gonna become a civil engineer. I'm gonna design septic tanks for playgrounds. Little kids can take shits! You idiot, what the hell do you do?
User avatar
Alfaholic
Posts: 437
Joined: Fri Nov 14, 2014 11:23 am
Location: Norway.Karmøy

Re: Adjusting amplifier

Post by Alfaholic »

Ill try with headunit first then, do i leave the amplfier Hz on full when headunit is used?
zpa0.5(V210245)
zpa0.3(00618)
zx600ti x2
600titanium
zx400ti
sd500.4
XSC5 x2
pld1
sdt-ti
tba
bass cube
tld66
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