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View Full Version : Hay folks with Alpine 9813 or 9815, come here plz (and for chrissakes,THIS TIME HELP)



Slaugh
09-14-2005, 09:58 AM
(hi ill try to ask this again, the other times i only got stupendous retarded replies)

so i have this Alpine 9815 hu and 2 alpine V12 amps (MRV-F407 for the comps doing the bi amplification directly at the hu and a MRV-1000 amp for the subwoofar: Pioneer Premier 12" model TS-W126C)

well my question regards gains and bass... so i started messing with the gains since i built this system and still i have doubts and complaints about it... let me say what it is and how it affects me... i still can't get it to work properly

well the gains on the 4 channel sub for the comps isnt a very annoying problem, but i have to crank it up a lot (it's now nearly on nominal and was nearly on 0,5v before and i still didnt sound very loud) and it does not get loud... well i can easily go past 25 - which is actually 75% of my hu volume - and it does not get very loud as my friends pioneer (even thou they leave their gains at the minimum 4v)... but the gains for the sub is the worst.... let me say i leave the gain on the sub amp at nearly 0,5v.... and i still i dont have enough bass :crying:...

well the bass only comes strongly when i use the MX which totally blows my comps away (it makes them sound awful compared to when it's apcent)... well what should i do... the sub out must be near the +15 (which represents 0db actually) for me to even hear the sub... if i for example lower the sub out to +10 i can barely hear it at all even at louder volumes (well unless MX is on)... even if i put my hand on the sub cone i can feel it barely moves (again, without MX)...

my EQ is using +5db for the bass and +3db for the mid/bass (it's a lot high being +6db the maximum allowed on the hu)... doing the sub cuts from the internal hu xover (at -12db/octave starting from 63hz)

i've tried increasing the sub gains even more but it begins to sound weird and i become afraid of clipping...

so im asking ONCE again (let's see if this time you guys answer my **** question instead of retardly saying "GAINS IS LIKE UNDERWEAR, EACH PERSON HAS A DIFFERENT ONE FOR THEIR NEEDS" over and over again)... if no one gives me a good reply ill just shut up for good, this qustion is annoying me... i can't get my system to satisfy my needs because of this gain mayhem... so instead of *****ing why don't you just offer help ok?

Slaugh
09-14-2005, 10:38 AM
i forgot to say when i play a test tone like 10hz, 15hz, 20hz or whatever, even without MX the sub moves a ****IN LOT even below volume 20 (note that at the same volume without messing with any settings and playing a music with bass like rap i can barely feel it :( )... its even scary it looks like the sub is gonna jump out of the box lol... but when i play music there's barely bass :(

tRiGgEr
09-14-2005, 10:40 AM
You get no help my pompes *** of a fellow froum member.

Slaugh
09-14-2005, 12:17 PM
alright, some mod plz move this to General Room plz

3.5Max6spd
09-14-2005, 01:05 PM
You get no help my pompes *** of a fellow froum member.

buahaha!

Slaugh
09-14-2005, 01:13 PM
rite :mad:

f.a.g.s :(

RikuY
09-14-2005, 04:26 PM
There are some fundamental concepts at play here. I am not trying to insult you, but really go to your local stereo shop and have them set everything for you. Ask if you can watch and learn from the process and then go from there.

Some of this stuff is not as easy as "read it on the internet, so I know what I am doing"

I hope you take this seriously, as I detect a tone of a past flame war from previous comments.

I hope this helps.

Slaugh
09-14-2005, 04:52 PM
i dont have local stereo shop... im the one who takes care of my system.. what should i do?

AVSTANG02
09-14-2005, 06:37 PM
Slaugh the next ls1pimp.

We really can't help u.. far too many details we dont kno about yer system...

I bet yer just expecting way to much from yer equipment...

Slaugh
09-14-2005, 07:00 PM
ok i always thought my hu had faulty pre-outs, do you guys agree this is possible?

all i was about to ask (which i forgot) is where do you guys leave your gains at... and what eq and cross config do you guys use.. and that's all for real

AVSTANG02
09-14-2005, 07:18 PM
Shutup about the ****in preouts and get a DMM.. jebus.

Our gains are different because we are not running the same amp/headunit configuration as you... again get a dmm and read the sticky.

Slaugh
09-14-2005, 07:29 PM
what is a DMM? and why not just tell me where are your **** gains and stuff?

JLCivic
09-14-2005, 08:10 PM
ok i always thought my hu had faulty pre-outs, do you guys agree this is possible?

all i was about to ask (which i forgot) is where do you guys leave your gains at... and what eq and cross config do you guys use.. and that's all for real

There were plenty of complaints on the forums regarding the "weak sub pre outs" on that year's alpines(and even the year before). Your post hardly surprises me.

I remember a guy who had a 9815, then bought a 9835, and the FIRST thing he did was test the pre outs to see if they were stronger(both rated at 4V, but he found the 9835 to have stronger preouts).

AVSTANG02
09-14-2005, 11:27 PM
Yer not helping him with this nonsense about weak preouts.. preouts have nothing to do with SHIET except where you have to have your gains set.

His original post doesnt even really make sense..

So many things could be wrong with his setup.. for all we kno he has his subs wired backwards in a box that is wayy too large.

read the sticky and set yer gains with a Digital Multi Meter....

Also what frequencies are you boosting with yer eq?? its definately going to sound like **** if yer boosting yer "bass" frequencies to +5... flatten it all out and then set yer gains.

Also never compare your setup to someone elses.. his could be louder for a million different reasons not just cause of preout voltage..

Spr0ket
09-15-2005, 12:20 AM
Yer not helping him with this nonsense about weak preouts.. preouts have nothing to do with SHIET except where you have to have your gains set.

His original post doesnt even really make sense..

So many things could be wrong with his setup.. for all we kno he has his subs wired backwards in a box that is wayy too large.

read the sticky and set yer gains with a Digital Multi Meter....

Also what frequencies are you boosting with yer eq?? its definately going to sound like **** if yer boosting yer "bass" frequencies to +5... flatten it all out and then set yer gains.

Also never compare your setup to someone elses.. his could be louder for a million different reasons not just cause of preout voltage..

:word:

Slaugh
09-15-2005, 08:27 AM
amazign no one has yet said their gains or eq/xover settings... thanks once again

let this thread die... nothing was added to my knowledge once again

AVSTANG02
09-15-2005, 03:42 PM
amazign no one has yet said their gains or eq/xover settings... thanks once again

let this thread die... nothing was added to my knowledge once again

Omg. Ok fine.

My gains are set at just a touch over half way.
My eq is +3 for 12k
and +2 for frequencies a lil below 12k mid-highs... dunno exactly what hz...
and +1 for my midbass frequencies.... i cant remember what they are set at right now... and flat for my bass....

My subs are LP at about 60hz and my coaxials are hp at about 60hz.

None of this is relevant to your system/ears/car..

Sell your system and shoot yourself in the foot.

JLCivic
09-15-2005, 04:52 PM
Yer not helping him with this nonsense about weak preouts.. preouts have nothing to do with SHIET except where you have to have your gains set.

His original post doesnt even really make sense..

So many things could be wrong with his setup.. for all we kno he has his subs wired backwards in a box that is wayy too large.

read the sticky and set yer gains with a Digital Multi Meter....

Also what frequencies are you boosting with yer eq?? its definately going to sound like **** if yer boosting yer "bass" frequencies to +5... flatten it all out and then set yer gains.

Also never compare your setup to someone elses.. his could be louder for a million different reasons not just cause of preout voltage..

If you think mentioning weak pre outs in regard to different alpine models of the past few years is nonsense then you haven't been reading the bazillion complaints on the forums. Slaugh has a problem, and in another post he also mentioned "always thinking his pre outs were messed up." It is entirely possible that he is correct on that. Again, he might not be, but I think it is pretty rare to set up your system, and not get nearly as much volume as you expect(except for the owners of some alpines from 01 to 03 who had the problem quite often from what I have seen on the forums) unless there is some sort of pre out issue(weak, clips early, etc).

Given the deck he has, that IS a possibility. True, his pre outs may be fine and there could be some other issue in the system, but given that model of alpine, the possibility of a "weak" pre out is as likely as some other issue.

tRiGgEr
09-15-2005, 04:56 PM
Sell your system and shoot yourself in the Head.

Fixed.

AVSTANG02
09-15-2005, 10:23 PM
I just read thru 40 zillion google and dogpile links that say "alpine weak preouts"

Every single one of them was hearsay... One was a guy that tested the newer decks and he got almost 1v over the 4v rating...

Even so if he has weak preouts all he would have to do is turn his gains up a lil higher.

he needs to set everything flat sub-w = 15 and set his gains with a DMM if he wants to get an accurate safe setting.

Car audio is a tricky thing.

I bet you $10 that if he sets his gains with a DMM he still won't be impressed.. i bet he has another issue.

Slaugh
09-15-2005, 11:06 PM
alright uh... first let me say thanks for those who took their time trying to offer some help instead of just spaming with even more bullshit this thread... after let me excuse for my impatience over this, and my lack of explanation, but i can't describe with words how much this problem has been getting me nervous, for all the money i spent on my sytem...

well you guys say that may be no problem, well i insist on it... ive talked to people who has the same hu and very similar setup (cos it's a chance in a million to find someone else with the same system) and they have been reporting much less annoyance than i have with bass and gains and all this bla bla bla...

you have no idea how much i've been trying to set the gains (well once was the problem of the stereo gains, but now ive just settled with listening to my music not loud enough, but at least without the goddam awful ground noise, when i had my gains set too high)... but now what's driving me insane is the subwoofer one... look, chances are it's not the preout voltages, but i think it's more likely to be a problem with how much bass the hu can send to the amplifier... cos the excursion is really good but it just doesnt "sound" compatible with the excursion...

but the MX... well, the MX really makes my sub hits hard (maybe even more than i desire), but it's definetly NOT worth it since it craps out my comps so badly it becomes a pain to listen to music (seriously the and mid-high and high frequencies sounds very bitter and strident, and it kills the front stage, let alone it induces distortion to the music and kinda mix up the higher frequencies... i hate it).. without MX music is good... but lacks bass =/... oh well, you think cranking up the gains help, but it doesn't... i don't know you guys would comprehend if you heard my system, you would all say it's just NOT good...

im not a fan of loud or burping bass systems... but it's just that the bass is completely absent and the comps doesn't sound loud enough... i just thought someone here would have the same problem, but it seems no one is... i think chances are i might have screwed up my preouts or something...

bah i dont know anymore, i think ill just take it and maybe borrow a friends hu to test in my system so i can compare... but so far it has been seeming to weird :(

JLCivic
09-16-2005, 06:12 AM
I just read thru 40 zillion google and dogpile links that say "alpine weak preouts"

Every single one of them was hearsay... One was a guy that tested the newer decks and he got almost 1v over the 4v rating...

Even so if he has weak preouts all he would have to do is turn his gains up a lil higher.

he needs to set everything flat sub-w = 15 and set his gains with a DMM if he wants to get an accurate safe setting.

Car audio is a tricky thing.

I bet you $10 that if he sets his gains with a DMM he still won't be impressed.. i bet he has another issue.

Yes, the newer decks(9835, etc) had the problem corrected. I have seen the posts. I have seen the test results a guy did on a 7897(same era we are talking about). I certainly am not saying that every time somebody had a problem with that era of alpine deck, it is due to weak sub pre outs, not at all. I am saying that since many people did have that complaint, it is legitimate(and the testing on the 7897 was very thorough). Again, slaugh may have no problem with his pre outs, but absolutely dismissing the idea that his pre outs might actually be weak, etc might not be accurate either. Keep your mind open to the idea that it could be a pre out issue.

I agree with you, car audio is a tricky thing(sometimes, a VERY tricky thing).

AVSTANG02
09-17-2005, 04:02 PM
alright uh... first let me say thanks for those who took their time trying to offer some help instead of just spaming with even more bullshit this thread... after let me excuse for my impatience over this, and my lack of explanation, but i can't describe with words how much this problem has been getting me nervous, for all the money i spent on my sytem...

well you guys say that may be no problem, well i insist on it... ive talked to people who has the same hu and very similar setup (cos it's a chance in a million to find someone else with the same system) and they have been reporting much less annoyance than i have with bass and gains and all this bla bla bla...

you have no idea how much i've been trying to set the gains (well once was the problem of the stereo gains, but now ive just settled with listening to my music not loud enough, but at least without the goddam awful ground noise, when i had my gains set too high)... but now what's driving me insane is the subwoofer one... look, chances are it's not the preout voltages, but i think it's more likely to be a problem with how much bass the hu can send to the amplifier... cos the excursion is really good but it just doesnt "sound" compatible with the excursion...

but the MX... well, the MX really makes my sub hits hard (maybe even more than i desire), but it's definetly NOT worth it since it craps out my comps so badly it becomes a pain to listen to music (seriously the and mid-high and high frequencies sounds very bitter and strident, and it kills the front stage, let alone it induces distortion to the music and kinda mix up the higher frequencies... i hate it).. without MX music is good... but lacks bass =/... oh well, you think cranking up the gains help, but it doesn't... i don't know you guys would comprehend if you heard my system, you would all say it's just NOT good...

im not a fan of loud or burping bass systems... but it's just that the bass is completely absent and the comps doesn't sound loud enough... i just thought someone here would have the same problem, but it seems no one is... i think chances are i might have screwed up my preouts or something...

bah i dont know anymore, i think ill just take it and maybe borrow a friends hu to test in my system so i can compare... but so far it has been seeming to weird :(


Sell your system and shoot yourself in the HEAD.

Your problem is massive. not as simple as swapping out your headunit.

You have something wired wrong, yer box is built out of specs, your crossovers are not set properly...

you have more problems then ls1pimp.

Slaugh
09-17-2005, 04:05 PM
well thanks for the unnecesary post

this thread was almost dead when you decided to spam it... now you have to deal with it on the main page for even longer, since you dont want to help

AVSTANG02
09-17-2005, 04:32 PM
your ****ing crazy.

How can we help you when you dont even want to help yourself?

Slaugh
09-17-2005, 07:15 PM
shaddap i have issues

http://img224.imageshack.us/img224/2719/611041335cm.jpg

AVSTANG02
09-17-2005, 07:34 PM
:confused

mikegett
09-18-2005, 01:41 PM
Slaugh, I don't think that AVSTANG02 is trying to flame you. He has made some good points, just not in the most appropriate manor. Most of the members have all been in a situation close to yours. We spend the money on a product and find it very difficult to get the results we expect. It becomes increasingly difficult to ignore. I have spent months in my car so pissed off with the sound that I just turn off the radio. Being reminded of it everyday just compounds the tension. I strongly suggest that you turn off the HU and take a break from it for a week or two. It is amazing how a few days or hours away can help to clear your head. Once you have had some time away, start from scratch on your system. There are many issues that can be causing your troubles beyond the HU and gains.
First, buy a Digital Multi Meter. Don't go cheap with the Wal-Mart $15 dollar meter. You need one that is rated for around 30 to 40 amps on DC. It must also be sensitive enough on the AC range to detect a few volts. Some cheaper meters have a very limited range. Go to www.sears.com and order one of there models. A decent meter will cost about 100 dollars for the amp rating. The cheaper one for about 30 will work but be carefull with your test tones. A 30Htz test tone will quickly make your amp pull its max current. If it exceeds 10amps (which that meter is rated for) you can damage it.
Once you have a meter, you want to check your cars voltage. Ensure that your altenator is putting out sufficiant voltage. Between your battery and altenator, you should read over 13 volts. A good altenator will be around 13.7 to 14 volts DC. If it is under 13 volts, you could have a voltage drop causing problems. Once the altenator is checked disconnect the battery. You will be checking the battery will all wires disconnected. It should read a strong 12. If it is under 12 volts DC, you need a new battery. Please make note that a failing altenator will almost always cause the battery to go bad.
Once you have checked the altenator and battery, double check your power and ground lines. Please post on here your power and ground line sizes and lengths. Please post both amps rms and max rating as well. You may be getting a drop in voltage due to small power lines or a poor connection. Look at your power line at the battery. Is there any lime built up on the connector. If so, clean it and reposition the connection. Ensure your ground line is good. Did you scrap away the paint around your grounding point? Is your grounding screw large enough? Most power issues are a result of poor grounding. I run all my grounds to a distribution block to ensure a large grounding surface. Now, take your multimeter and place it in ohms. The symbol that looks like a horse shoe. Place one end on your amp ground and the other on the grounding point. You are looking at the resistance in the line. The lower the number the better your ground. Leave one end on the ground post and place the other on various locations in the trunk. Do you see it drop in resistance. If so, your ground post may need to be cleaned or moved to a larger metal surface. I highly suggest you look at these areas. You entire system will be affected if the voltage is not correct to begin with.
You stated that a test tone moved your cone but music hardly makes it move. This has nothing to do with your preout capacity. A test tone requires more wattage than a music note due to it being constant. If your preout was weak it would still produce a weak test tone just as it did the music note. You should also take note that a test tone below 100 Htz should not be used for more than 30 seconds. Your amp can easily burn up if prolonged. As stated earlier, this could be more of a issue in the box volume or a crossover setting. To ensure that your crossover is not blocking some needed frequencies try a test tone at 40Htz. Test every 20 Htz up to 200. If your crossover is blocking some frequencies you will see it when the cone stops moving. Just let your amp cool down between tests. Due to crossover slopes, this won't be a perfect test but it may help to shed some light on the problem.
Prior to setting your gains, read all the tutorials you can. You will see that there are alot of assumptions that individuals make about gain settings. In reality, there is only one perfect setting. In order to achieve this setting, you need to understand what is happening at the HU and the amp. what AVSTANG02 was attempting to tell you, is that your HU voltage is not constant. If you are rated for 4 volts, it will reach the 4 volts at or just below clipping. Beyond this 4 volts, you may get some gain in voltage but most will be distortion. The same holds true with your amp. Your amp takes the voltage and ampifies while converting it to AC wattage. There is a max wattage that the amp can produce before it clipps. If your amps input is rated for .1 to 8 volts then it can produce that max wattage with .1 or up to 8 volts. Beyond 8 volts, it starts to limit the range you can increas your HU volume before it clips. The key is to match your HU voltage just under clipping with your amps input just below clipping. The only way these settings will be the same between two different people is if they both owned the same HU and amp. Even hardware that is rated the same may overexceed or underachieve what they claim.
The first step is to test your HU for clipping. I hit the reset button on my radio when I do this. You do not want any bass boost or eq on at this time. Do a search for tutorials on this. A scope is the best method but unpracticle for most people. Instead, search for a site that has a clipped and unclipped sine wave. Download each and listen to them very carefully. Place the unclipped sine wave on a cd and play it on your car. Only do one amp at a time. Place it at the lowest gain possible. You want your HU to clip before your amp in this test. Increase the HU volume until you hear the sine wave clip. Make note of this number and do not increase beyond it. In reality, you should stay five to ten numbers below. Any eq or bass boost will cause the HU to clip earlier. Some companies may clip at 80 percent of max while others may be set to stop before clipping. My current eclipse seems to increase to max without a clipped signal while my previous one clipped at about five numbers below. My previous Pioneer clipped at 15 below the max. It all varies. If you only have a sub amp in your car, place a normal speaker on the amp. It is very hard to hear a clipped signal from a sub.
Once your Hu is set, you need to do the amp gains. Since you are tuning the amp input to your HU's max output a weak preout will have no affect. Just be certain to have your sub volume at max prior to setting. There are plenty of tutorials on gain settings with a DMM, so I won't go into it. Good luck with your audio and just remember to take it easy.

limitkid7
09-19-2005, 12:26 PM
i had the 9813 im me on aol if u need help

Slaugh
09-19-2005, 03:12 PM
oh wow

thanks for the bible, mike... i guess ill take some time later on to read it lol

thanks for those trying to help too, that's much nicer than just saying crap.. lol thanks

bigbangtheory
09-22-2005, 02:35 AM
You mean I just read that book for nothing? I dont even have a problem and he had some good ideas. Hope you take that time and read that. Now I have to go wash my eyes out as they are dried out.

Cris
09-22-2005, 05:35 PM
Okay. I'm willing to take a shot at it, given you do a few things. First, beyond actually describing the settings on your head unit, you need to do a lot more.

If you can, take pictures of your system setup. This includes how everything is wired (amps AND your sub) also what type of box you're using, a picture of it would help, what kind of wiring you're using, etc.

Simply put, you can't pinpoint your sub not hitting hard-enough on your head unit. There could be a LOT of problems, including wrong wiring, car issues, etc.. so document all you can, and try to provide as MUCH information as possible (beyond the head unit) as you can.
then, maybe, people would be more willing to help you out.

blowsoot
12-16-2005, 05:00 AM
I know this is old but im having the same **** problem so thank you! SUB sounds like complete *** not very loud Alpine 9815 woot! When it gets loud it sounds like crap. So basically im about to ditch this PoS for an X889. I have seen and heard alot about this with these hu's. Any news or tricks with this hu?

slain93gsr
12-16-2005, 03:23 PM
With my cda 9813 , ppi amp, and 12" alumapro alchemy if i want it to I can make it slam pretty hard. I have my sub setting usually at around 2-3 out of 15 ( varies with each song) the highest i have the vol is 24

Say if some old posse on broadway were to be playing i would turn the sub up to around 6-7 and it would start to modulate my voice..

never experienced anything like described i've had both 9815 and a 9813.