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building soundsystem
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daio
Started Topics :
7
Posts :
338
Posted : Feb 2, 2010 15:37:46
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Hey dudes!i m thinkin to make my own soundsystem for making privates and such...
would any body know what the first steps are for building a descent quality pa?
for example...some nice brands for loudspeakers,active or passive,and generally all the factors i should have in mind to do it!
cheerz!!! |
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Dennis the menace
DevilsDennis Sparris McHilton
Started Topics :
128
Posts :
2899
Posted : Feb 9, 2010 21:31
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a tip is to always have more power in your amps than your speakers can handle.
Check out JBL and Mackie.
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orange
Fat Data
Started Topics :
154
Posts :
3918
Posted : Feb 10, 2010 00:41
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Quote:
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On 2010-02-09 21:31, Dennis the menace wrote:
a tip is to always have more power in your amps than your speakers can handle.
Check out JBL and Mackie.
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well that is wrong...
a higher wattage amp will propably blow e less watted speaker!
the speaker needs to have some kind of headroom in wattage.
ex.
a 2x50w rms 8om amp will work very good with a pair of 2x90w rms 8om speakers.
cos the speaker is capable of producing the all the power of the amp into sound without strianing it and still have a headroom of 40w each.. so enouph headroom to breath!
 http://www.landmark-recordings.com/
http://soundcloud.com/kymamusic |
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psy-junky
IsraTrance Junior Member
Started Topics :
11
Posts :
2151
Posted : Feb 10, 2010 06:49
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Quote:
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On 2010-02-10 00:41, orange wrote:
well that is wrong...
a higher wattage amp will propably blow e less watted speaker!
the speaker needs to have some kind of headroom in wattage.
ex.
a 2x50w rms 8om amp will work very good with a pair of 2x90w rms 8om speakers.
cos the speaker is capable of producing the all the power of the amp into sound without strianing it and still have a headroom of 40w each.. so enouph headroom to breath!
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That is wrong ..... when driving a speaker with even more powerful amplifier than the speakers handling...Ideally if your playing it at safe volume levels a higher powered amp will give you more quality since you have the extra power/headroom in the amplifier
Whereas if you have a low powered amplifier driving inefficient speakers at high volumes it can clip the signal from the amplifier which is where you risk blowing the speakers since a speaker trying to reproduce a clipped signal is the worst danger
"Whoever said the best things in life are free... obviously grew their own bud" |
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psy-junky
IsraTrance Junior Member
Started Topics :
11
Posts :
2151
Posted : Feb 10, 2010 13:26
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Quote:
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On 2010-02-09 21:31, Dennis the menace wrote:
a tip is to always have more power in your amps than your speakers can handle.
Check out JBL and Mackie.
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I think mackie would be better in sq by a little bit and you have to look at 2 channel amplifier to drive these.
"Whoever said the best things in life are free... obviously grew their own bud" |
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psy-junky
IsraTrance Junior Member
Started Topics :
11
Posts :
2151
Posted : Feb 10, 2010 13:34
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http://www.musiciansfriend.com/live
have a look they have live sound speakers, amplifiers, subwoofers
"Whoever said the best things in life are free... obviously grew their own bud" |
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orange
Fat Data
Started Topics :
154
Posts :
3918
Posted : Feb 10, 2010 15:42
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http://www.gcaudio.com/resources/howtos/spkramp.html
we are both right
ex.
a 2x500w 8om amp drives a pair of 2x250w 8om speakers its ok if you never push the amp to exceeds the power handling of the speakers.
this works better if the amp is like 2x200w 8om cos the speakers will sustain the full power of the amp without risking of blowing any of the two the worst that can happen is to have clipping and distortion from the amp wich is easy to listen and make the volume adjustment!
in the first case the amp will not clip or distort but the speaker will be strainght to its limits thus eventually blowing it just cos the amp will have alot of power!
we all know that we like loud music and if you have a very strong amp with weaker speakers you will be tempted to go higher in volume for a long period.... you know where this will go...
http://www.landmark-recordings.com/
http://soundcloud.com/kymamusic |
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daio
Started Topics :
7
Posts :
338
Posted : Feb 10, 2010 16:44
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how about active ones?
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orange
Fat Data
Started Topics :
154
Posts :
3918
Posted : Feb 10, 2010 17:00
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Dennis the menace
DevilsDennis Sparris McHilton
Started Topics :
128
Posts :
2899
Posted : Feb 11, 2010 22:24
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Quote:
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On 2010-02-10 15:42, orange wrote:
this works better if the amp is like 2x200w 8om cos the speakers will sustain the full power of the amp without risking of blowing any of the two the worst that can happen is to have clipping and distortion from the amp wich is easy to listen and make the volume adjustment!
in the first case the amp will not clip or distort but the speaker will be strainght to its limits thus eventually blowing it just cos the amp will have alot of power!
we all know that we like loud music and if you have a very strong amp with weaker speakers you will be tempted to go higher in volume for a long period.... you know where this will go...
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The mistake people make is they don’t realize how much power their amplifier is actually creating when it clips.
An amp under hard clipping conditions has the potential to almost double the amount of power that it puts out at its full continuous (RMS) rating. That is to say that an amp with a 200W continuous rating can put out (the duty cycle equivalent of) 400W during hard clipping.
In my own case, i have 2 amps running my subs, both delivering 310 watts in 8 ohms /channel. and my 4 subs are rated 450 watts continuous, 900 watts program.
So what i do is to bridge the amps and run the subs chained in pairs, that gives me 4 ohm, 900 watts rms and 1800 watts program in the subs and the amp can deliver 1660 watts in 4 ohm bridged.
That way i can get the full out of my subs and have still have headroom left in my amps and i don't even need to get close to clipping them.
On the other side, if i crank my amps to the full then the subs are on fire, but why would i do that 
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Dennis the menace
DevilsDennis Sparris McHilton
Started Topics :
128
Posts :
2899
Posted : Feb 12, 2010 09:42
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Btw, à smart thing to do is setting up limiters after setting à proper gain structure. Better to be safe than sorry 
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