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Old 07-17-2005, 07:00 AM   #1 (permalink)
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Question Real stupid question?

Ok, this is a real stupid question so dont laugh. What are the following adjustments on my amp and what do they do? LPF, HPF, Phase Shift, Sub Sonic and Gain. The amp I got is my first amp so I have no idea what they are and how they work. I thought if I knew what they did I would be able to adjust my amp to make it sound good all the time, some songs sound really good but then some sound really crappy. Its not a good amp or anything I got it at Circuit city. The subs and box came with it. Its a alphosonic(I think thats how you spell it) the amp, subs and box cost me $180 its only a 200 watt amp and the subs are 10's. Thanks in advance everyone.
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Old 07-17-2005, 12:43 PM   #2 (permalink)
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Quote:
Originally Posted by WhiteTrash2775
Ok, this is a real stupid question so dont laugh. What are the following adjustments on my amp and what do they do? LPF, HPF, Phase Shift, Sub Sonic and Gain. The amp I got is my first amp so I have no idea what they are and how they work. I thought if I knew what they did I would be able to adjust my amp to make it sound good all the time, some songs sound really good but then some sound really crappy. Its not a good amp or anything I got it at Circuit city. The subs and box came with it. Its a alphosonic(I think thats how you spell it) the amp, subs and box cost me $180 its only a 200 watt amp and the subs are 10's. Thanks in advance everyone.
did you read your manual??

lph-low pass filter-low freq pass, highs are blocked
hpf- opposite from lpf
phase shift- hard to explain , if your subs wired correctly, id leave it alone
sub sonic filter- filters out extremely low freq so as not to damage your woofer in certain enclosures
Gain- like volume but not, the higher the gain is set the quicker the amplifiers amplifies the signal sent to it, the lower the gain set the amp will get louder slower compared to your receiver, if set to high it will get louder at a faster rate then the volume of your receiver, use a voltmeter to achieve a proper gain
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Old 07-21-2005, 08:34 AM   #3 (permalink)
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Ok thanks for the info, I do have a volt meter, how do I use it to set the gain? I have my 200 watt amp hooked up to the stock radio in my Solara if that helps at all, I am gonna be putting in my Jensen head unit I have in my truck but I dont know when. So any help on getting it to sound good would be great. I know its not gonna sound to good because I am using a stock radio but I cant get it to sound good all the time, some songs sound good then others sound like crap. Thanks in advance bro.
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Old 07-21-2005, 03:04 PM   #4 (permalink)
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to set the gains correctly with a voltmeter you take your wattage output by the amp and divide it by the Ohms/resistance of your speakers/subs, then take the square root of that number. SQRT(VOLTS/OHMS)

Set your voltmeter to read AC voltage and hook your + and - leads to the speaker terminals on the amp, start at 0 and dial your gains up to achieve this number.

if you want better sounding music devinately get a better receiver with good Preouts, a quality amp and a good component set
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Old 07-22-2005, 08:04 AM   #5 (permalink)
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Quote:
Originally Posted by DrtySthV6SE
to set the gains correctly with a voltmeter you take your wattage output by the amp and divide it by the Ohms/resistance of your speakers/subs, then take the square root of that number. SQRT(VOLTS/OHMS)

Set your voltmeter to read AC voltage and hook your + and - leads to the speaker terminals on the amp, start at 0 and dial your gains up to achieve this number.

if you want better sounding music devinately get a better receiver with good Preouts, a quality amp and a good component set
Thanks bro, just one more stupid question, the wattage out put would be 200 on a 200 watt amp right? I didnt know if that changes depending on what the bass boost is set at, does a 200 watt amp always put out 200 watts? I know real stupid question but I am a carpenter, but I started school for Advanced Automotive training about 4 months ago so hopefully I wont have to ask all these dumb question soon.... Thanks Again Bro
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Old 07-22-2005, 10:47 AM   #6 (permalink)
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well to put it simply the amp usually can only put out what its max numbers are.. but even then.. it hard to push all of it out, and you probably wont want to because the amp might just overheat and clip out, or also might damage it..

but to put it simply a 200 watt amp will be somewhere in the area of 200 watts.. depending on the final load (in ohms), wether its bridged, what type of wiring you have (too small will send less, but too big will lose power too)

oo btw bass boost isnt going to affect the wattage so much. Its always going to try and run continuously at a certain wattage.. bass boost may alter this a little..

also the amp might not always run at 200 because you alternator might not be able to keep up.. you battery might dip really low..

but to keep things quite simple.. yes it will basically hold at 200 watts
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Old 07-23-2005, 09:32 AM   #7 (permalink)
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Ok thanks, I will mess around with it today and see if I can get it set right, thanks again I know I am probably getting on some peoples nerves with the qeustions I ask... I will let ya know how it goes.
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Old 07-23-2005, 09:51 AM   #8 (permalink)
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Originally Posted by Corollacrazy42
but too big will lose power too
no
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Old 07-23-2005, 09:59 AM   #9 (permalink)
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Quote:
Originally Posted by WhiteTrash2775
Thanks bro, just one more stupid question, the wattage out put would be 200 on a 200 watt amp right? I didnt know if that changes depending on what the bass boost is set at, does a 200 watt amp always put out 200 watts? I know real stupid question but I am a carpenter, but I started school for Advanced Automotive training about 4 months ago so hopefully I wont have to ask all these dumb question soon.... Thanks Again Bro
Are you talking 200 watt RMS or 200 max wattage?

Let's assume you're running a 400 watt amp with an RMS rating of 200 watts and all wiring and your electrical system is fine.

The 400 watt max means that is the max rated power the amp can spike to without being damaged. Manufacturers like to bullshit this number through improper testing or just flat out lie. RMS is the wattage the amp is capable of handling consistantly before being damaged. This is the number you should always look at when dealing with wattage. Find an amp that is comfortable producing power around the same level as your speakers.

Just because the amp claims 400 watt max and 200 RMS doesn't mean it will always be under full load. Think of your amp as a dimmer switch for a light. As you need more light you can increase the switch. Basically the head unit sends the signal to the amp and controls the output. You can hardwire some settings on the amp itself such as bass boost, filters and your gains.

Think of it this way, when you have your volume on your headunit set to 5, your amp will be using less power than when you have it set to 40. Certain frequencies take more power than others, such as the lower frequencies.

Bass boost over amplifies lower frequencies, much like bass boosts on your head unit. Bass boost will affect your wattage. If you turn it up you will be using more power per volume level.

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Old 07-23-2005, 02:29 PM   #10 (permalink)
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Originally Posted by OHWJaJae
no
ok how no... ive heard this from numerous people.. if the wiring is to big for the amount of power being put out.. then there is lost power within the wiring.. and besides that.. your not gonna wanna use any wiring very big with a 200 watt amp
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Old 07-25-2005, 07:33 AM   #11 (permalink)
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Wow, nice post I learned alot from it. The amp I have came with the subs the brand is alphosonic(dont know if I spelled that right) I got it at Circuit City it only cost me $180 for both so its a cheap set up. So the subs should be able to handle the amp when its turned up all the way. Has anyone ever heard of this brand?? Thanks again everyone for all the help.
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Old 07-25-2005, 01:52 PM   #12 (permalink)
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Quote:
Originally Posted by Corollacrazy42
ok how no... ive heard this from numerous people.. if the wiring is to big for the amount of power being put out.. then there is lost power within the wiring.. and besides that.. your not gonna wanna use any wiring very big with a 200 watt amp
That's just not how electricity works. You can have as big of a wire as you want it won't have a negative effect. Again, think of it this way. Let's say you have your volume on 1. The amount of current through your 4awg wiring is minimal and you wouldn't receive a benefit by going to 22awg wiring. Same as if you had your system at half power. You wouldn't receive a benefit from having 8awg or any loss from using 4awg.

If your wiring is too small, that's where you can have problems. It's never a bad thing to go larger than what you need though.

Last edited by OHWJaJae; 07-25-2005 at 01:53 PM.
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