Amp and subwoofer connection,

[dozug]

To the D3, I have two Alpine f250 connected, and now im going to buy subwoofer, Im not huge fan of subwoofer so im going to buy cheap one,,

 

Item Specifics - Car Subwoofers

Brand: Alpine

RMS Wattage: 900

Model: Type S

Voice Coil: Dual

Size: 12 inches

 

Will this work with Alpine f250?

Brand: Alpine

RMS Wattage: 200

Model: MRP-F250

Channels: 2/3/4-Channel

 

 

Thank you

[CatchMeIfYouCan631]

200w RMS amp to a 900w RMS sub? It'll work but you're underpowering it.

[dozug]

200w RMS amp to a 900w RMS sub? It'll work but you're underpowering it.

 

I think 900w is not RMS... Its Type S.. cheap one., so yea,, but will it work as 200w??

 

Also it says its 2ohm, what is this??

[CatchMeIfYouCan631]

Ohms are a measurement of resistance. The Higher the Ohm Impedance, the higher the resistance.

[dozug]

Ohms are a measurement of resistance. The Higher the Ohm Impedance, the higher the resistance.

 

hm,, sorry but i really dont understand,, can you explain with simple words?? more bass??.. i really dont know..

[SDJASON]

Ohms are a measurement of resistance. The Higher the Ohm Impedance, the higher the resistance.

 

hm,, sorry but i really dont understand,, can you explain with simple words?? more bass??.. i really dont know..

 

Less Resistance, more bass.

 

If you have a 200W Amp, thats measured at a specific resistance, usually 2 or 4 ohms.

 

If you wire up two Speakers in series, and each speaker is 2 ohms resistance, you will have 4 ohms total resistance. Think of resistance as teh skinny part of an hourglass, or a door that a bunch of people are going through at once, they resist "movement".

 

If you wire up two speakers in parallel and each speaker is 2 ohms, your overall resistance is now 1 ohm (think of it in terms of leaving a crowded stadium, there isn't just one door, there is 2 (or more) so more people can leave at once.

 

Voltage can be thought of as the height of the "hourglass" If the hourglass is 60 feet tall, there will be "pressure" forcing the sand through faster than through that same sized hole on a shorter hourglass. Resistance resist's "pressure" (voltage).

 

Current can be thought of as the little grains of sand moving through the hourglass. It is measured in the form of a rate, AMPS simply means a set amount of "grains of sand" per second. So a 60 foot tall hourglass with a huge hourglass opening generates a large amount of amps (grains of sand per second) while a short hourglass with a tiny opening generates a small amount of amps (grains per second). A short hourglass with a fat opening and a tall hourglass with a skinny opening both generate a moderate amount of amps (grains per second).

 

An amp has a wattage rating, which is usually calculated at a specific resistance, usually 2 ohms.

 

A typical subwoofer is a 2 ohm resistance, so connecting that subwoofer to that amp will generate that much wattage (bass) to the system.

 

Connecting a larger ohm subwoofer (skinnier hourglass) will result in a lower current passing through the amp, lowering its actual output, a 4 ohm speaker would probably make the amp operate at ~50W.

 

Connecting Two 2 ohm speakers in parallel would result in a virtual 1 ohm speaker, which would double the amperage passing through the system as a whole, and quadrouple the Power rating to 800W. Unfortunately, this is most likely out of the design spec for the amp (since it was originally rated 200W @ 2 ohms) and would most likely fry the amp or its fuses.

 

Some amps wattage are calculated at 4 ohms, some at 2, and some at 1 ohm. it depends upon the amp. Just because an amp is rated at a specific wattage doesnt mean anything unless it is connected to the appropriate "load" (resistance).

 

I hope this simple analogy helped you understand speakers a little better.

 

~Jason

[CatchMeIfYouCan631]

I have to admit, that is a very good analogy, Jason.