| Author |
Thread: Need Advice on amp |
    
Silver Member Username: Clouduz
Post Number: 120
Registered: Jun-06
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| Posted on Friday, March 23, 2007 - 11:49 pm: |
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What's the best amp I can get for around $250? I need a mono amp, will be running it at 2 ohms. They are 2 12's Sony's yea yeah i know i know but they aren't 'that' bad. Currently they are being pushed by a audiobahn a800t or something like that. Rms on each sub is 380 max 1200. How much can i push them safely? |
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Gold Member Username: James1115
Use a simple...
Post Number: 9715
Registered: Dec-04
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| Posted on Saturday, March 24, 2007 - 12:26 am: |
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look for a kicker kx600.1 or a jbl bp600.1 on ebay. you should be able to find them relatively cheap. |
Gold Member Username: Ctmike
Ct.
Post Number: 3687
Registered: Feb-06
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| Posted on Saturday, March 24, 2007 - 12:29 am: |
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"but they aren't 'that' bad"  |
Silver Member Username: Clouduz
Post Number: 122
Registered: Jun-06
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| Posted on Saturday, March 24, 2007 - 12:39 am: |
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ok thanx will look into it, but what's the most i can run them at w/o blowing them? |
Gold Member Username: 420alldaylong
Post Number: 1157
Registered: Sep-06
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| Posted on Saturday, March 24, 2007 - 02:15 am: |
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IcePick
This amp will run your sony subs just fine.
http://www.millionbuy.com/ligs45001.html |
Silver Member Username: Clouduz
Post Number: 126
Registered: Jun-06
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| Posted on Saturday, March 24, 2007 - 11:16 am: |
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hey joey, you don't think i'll be underpowering them? it's 2 subs and 380 rms each that's only 500 rms |
Gold Member Username: Van_man
Boston South,
MA
Post Number: 2261
Registered: Mar-06
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| Posted on Saturday, March 24, 2007 - 12:48 pm: |
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Check this out.
http://cgi.ebay.com/PHOENIX-GOLD-OCTANE-R8-0-1-CAR-AMP-AMPLIFIER-800W-NEW_W0QQit emZ140096041964QQcategoryZ18797QQcmdZViewItem |
New member Username: Crossfired
Post Number: 1
Registered: Mar-07
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| Posted on Saturday, March 24, 2007 - 01:39 pm: |
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This is a killer amp for the money! very under rated.
I had one installed for about a year(before system was stolen)with 2 x 12's and cranked all day and it never even got warm. Very clean too.
http://cgi.ebay.com/PIONEER-GM-D510M-1000W-CLASS-D-MONO-AMPLIFIER-AMP-NEW_W0QQit emZ170092260585QQcategoryZ18797QQrdZ1QQcmdZViewItem |
Gold Member Username: James1115
Use a simple...
Post Number: 9722
Registered: Dec-04
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| Posted on Saturday, March 24, 2007 - 01:58 pm: |
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go with either the kicker or JBL that I recommended or with the Phoenix gold that Marc recommended. |
Gold Member Username: 420alldaylong
Post Number: 1163
Registered: Sep-06
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| Posted on Saturday, March 24, 2007 - 02:23 pm: |
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IcePick
For what you are trying to do this amp will be fine.
http://www.millionbuy.com/ligs45001.html |
Silver Member Username: Clouduz
Post Number: 127
Registered: Jun-06
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| Posted on Saturday, March 24, 2007 - 03:13 pm: |
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thnx a lot guys for all the suggestions you all have been really helpful. I love the peeps on this board  |
Gold Member Username: James1115
Use a simple...
Post Number: 9735
Registered: Dec-04
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| Posted on Saturday, March 24, 2007 - 03:52 pm: |
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that lightning audio amp is a better boat anchor then a amp if you get my drift! |
Silver Member Username: Clouduz
Post Number: 128
Registered: Jun-06
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| Posted on Saturday, March 24, 2007 - 04:55 pm: |
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is this worth the price http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ih=002&sspagename=STRK%3AMEWA%3AIT &viewitem=%26item%3D120099777940%26%26
and is it a good amp?....oh and is there any way to tell how powerful amp "should be" by the fuses? |
Gold Member Username: James1115
Use a simple...
Post Number: 9741
Registered: Dec-04
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| Posted on Saturday, March 24, 2007 - 05:44 pm: |
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link didn't work |
Silver Member Username: Clouduz
Post Number: 129
Registered: Jun-06
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| Posted on Saturday, March 24, 2007 - 10:02 pm: |
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http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ih=002&sspagename=STRK%3AMEWA%3AIT &viewitem=%26item%3D120099777940%26%26
ok try this one sorry about that |
Silver Member Username: Clouduz
Post Number: 130
Registered: Jun-06
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| Posted on Saturday, March 24, 2007 - 10:04 pm: |
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wtf damn link won't work i tried it b4 i put it in  INFINITY 1211A REFERENCE 1516W MONO D AMPLIFIER AMP NEW Item number: 120099777940 try this sorry can't get the link to work for some reason |
Gold Member Username: Fishy
Tamarac Ft.Laud,
FL
USA
Post Number: 1604
Registered: Sep-04
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| Posted on Sunday, March 25, 2007 - 01:48 am: |
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I don't understand this underpowering stuff. As long as you're not clipping the amp things should sound just fine with a semi-efficient subwoofer. You'd be quite surprised how little power it generally takes to get the average sealed sub to reach Xmax. Ported is an entirely different beast however.
-Fishy |
Silver Member Username: Clouduz
Post Number: 132
Registered: Jun-06
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| Posted on Sunday, March 25, 2007 - 11:10 am: |
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well, i have them in a ported box for now |
Gold Member Username: Fishy
Tamarac Ft.Laud,
FL
USA
Post Number: 1605
Registered: Sep-04
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| Posted on Sunday, March 25, 2007 - 02:00 pm: |
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oh and is there any way to tell how powerful amp "should be" by the fuses?
You can get a general idea. If you remember that power out can never exceed power in and that no amplifier is 100% efficient you can use some basic formulas to make a guess.
(1) Power = Voltage times Current or P=V*I
(2) Power out = Efficiency times Power in or Pout=eff*Pin
Every amplifier has different efficiency ratings. It depends on the type of power supply, etc., but generally you can assume 80% efficiency for class D and around 50% for class A/B.
So say you have a really good charging system that has no problem supplying 14.4 volts to a proposed class D amplifier with say 60 amps worth of fusing. Theoretically the maximum continuous output of this amp would be:
Pout = eff*Pin = eff*V*I which yields
Pout = .80*14.4*60 or 691 watts
Unfortunately fuses aren't perfect. In other words it can take a good while for them to blow so such an amp might have the capabilty of producing upwards of 1000 watts for short periods of time. This is good because music is dynamic and very rarely will an amplifier be called upon to supply a continuous amount of power for extended periods of time. If you're playng test tones however...... thats a different story.
Remember however, that just because an amplifier has ample fusing doesn't mean it WILL produce this amount of power. It just means if designed well it COULD w/o blowing fuses.
So basically you use these formulas to determine if an amp really could do the things the specs say, but this method is still pretty crude. If you see a "1000 watt" A/B amp with a 30 amp fuse you can instantly call "Shananigans" and safely say the specs are lying. However I wouldn't be so quick to call a company which produces a 1000 watt class D incorporating a 60 amp fuse a "liar".
Did that make any sense?
Sometimes it just best to do what is being done here. Ask for suggestions from people who have actually used the equipment and remember you usually get what you pay for. Buy from well reputed companies.
There's also the weight theory. Usually a well designed amp "weighs" a lot, but that method is even more imprecise.
Hope all this helps.
-Fishy |
New member Username: Beatitdown
Post Number: 1
Registered: Mar-07
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| Posted on Sunday, March 25, 2007 - 05:31 pm: |
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please just return the sony's. they are shitty and your doing them too much justice by pushing them with thatb amp |
Silver Member Username: Clouduz
Post Number: 133
Registered: Jun-06
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| Posted on Sunday, March 25, 2007 - 11:41 pm: |
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lol wish i could now don't think best buy will let me |
