I need an amp?

[suparunna2000 10+ year member]

i must say that is the nicest female body (above the waist) that i have ever seen.

 

[req 5,000+ posts]

if it is a mono amp say 400 rms x 1 @ 2 ohms, you have 2 subs, both 2 ohm dvc's. If you wire them parallel to send a 2 ohm load to the amp. you should get 400 watts to each sub. this is because it is only one channel amp.

yea. thats TOTALLY wrong.

if you eat a giant meal a taco bell, then take TWO shits, does that mean that you shitted that whole meal out once? or divided it between the two shits?

if you hook up TWO subs to whatever-wattage amp (mono) than you must divide the power the amp provides at that resistance by two.

1x800@2ohms amplifier + two 400rms subs = each sub getting 400w. (ALL RMS FIGURES)

800w PEAK does NOT mean 800w continious. more like 400w RMS (aka continious)

that first PG amp was 400w RMS, and so is that first profile amp i listed, but for $200 you can get a PAIR of them, and do one amp to EACH sub.

magical- eh?

 

[suparunna2000 10+ year member]

yeah thats exactly what i said ... just not in such basic terms cause he didnt believe me the first time. hahaha!

ah well. i have taken a number of electric engineering courses, so i dont know how to explain such basic stuff! lol!

 

[mustangowner 10+ year member]

so your telling me my alpine type r's are only getting around 225 watts rms each? cause a have a profile ap1000m 500 watts rms x 1 @ 2 ohms pushing two alpine swr-1021d wired in parallel to get a 2 ohm load at the amp.

 

[suparunna2000 10+ year member]

that is the case! most people dont realize how loud 250 watts can be. if u r not in competition then it doesnt really matter too much.

 

[mustangowner 10+ year member]

this is a post i made asking about this setup...they said that amp will work fine for those subs...

http://forums.caraudio.com/vb/showthread.php?t=94565

yeah its loud, very loud, but if it can be louder then why not make it louder.

 

[suparunna2000 10+ year member]

http://www.crutchfieldadvisor.com/learningcenter/car/subwoofers_wiring.html

this is a great site. just remember that when u see a 2ohm next to the amp, that will be proportional in power to whatever u see next to the speaker.

 

[mustangowner 10+ year member]

yeah i know how to do all that, i underestand it. what i dont understand is how can i not get 500 watts rms to both subs

 

[suparunna2000 10+ year member]

Power (P), Voltage (V), Resistance ®

P = (V^2)/R

voltage is constant throught the system so V = constant ©.

P = C/R

amp sees a 2 ohm load because ur 4 ohm speakers are wired in parallel. so at the amps terminal there is 500 watts of power in the wiring total.

500=C/2

this makes our constant © = 1000.

remember Voltage (V) is constant throught.

now as the power reaches the speakers, we now have

P=1000/4 because the speakers still remain at 4 ohms.

so P = 250.

if im not making any sense u can try and google the following. (understand ohms law + car audio)

 

[mustangowner 10+ year member]

ok i now understand how u did that...but u are saying my subs are 4 ohm? they are the dual 2 ohm subs. Are u adding both coils together?

 

[suparunna2000 10+ year member]

Rt = total resistance

R1 = sub one or voice coil one

R2 = sub two or voice coil two

etc ...

wired in parallel

(1/Rt) = (1/R1) + (1/R2) + (1/R3) + ...

wired in series

Rt = R1 + R2 + R3 + ...

therefore, with ur two voice coils at 2 ohms each wired into parallel equal

1/2 + 1/2 = (2/2) or (1/1) = 1 ohm

or in series

2+2 = 4

so u have either 1 ohm speakers or 4 ohm speakers depending on how u wire them.

now u can choose to wire those subs that are 1 ohm or 4 ohm in series or parallel to have the same affect. do the math on ur own from there.

 

[suparunna2000 10+ year member]

so two 4 ohm in series

4+4 = 8

in parallel

1/4 + 1/4 = 2/4 = 1/2 => 2ohm