What are, ohm, db's, and rms?

Question

im going to buy 2-12 inch subs that have 1000 watts rms, 2x4 Ohm, and sensitivity is @ 1w-1m:102dB, they are single coils

Im gonna hook them up to a 1000 watt pioneer amp and i want to know if they are going to hit and sound good

Answer 1

Ohm

The unit of measurement for impedance or resistance. It tells you how much a device will resist the flow of current. If you take two signals of exactly the same strength and send one to a 4-ohm speaker and the other to an 8-ohm speaker, twice as much current will flow through the 4-ohm speaker. In other words, the 8-ohm speaker will require twice as much power (wattage) to play at the same volume.

Impedance

The total opposition to the flow of alternating current in an electrical circuit at a given frequency. Impedance is measured in Ohms. Although car audio manufacturers label the impedance of most car speakers and subs at 4-ohms, the impedance of a speaker is actually not a constant. It's actual impedance changes with frequency and can vary greatly. Therefore, though 4-ohms is the standard impedance in car audio, this standard is more of an average impedance for speakers and amplifiers when driven within the part of the audio spectrum for which they are designed.

Power Handling (RMS)

The maximum continuous sine wave power that can be dissipated by a speaker without failure, measured in watts RMS. Most speakers fail for one of two main reasons:

A speaker is driven with too much power, beyond its rating, and it overheats.

The amplifier is driven into clipping, producing square wave distortion that destroys the driver.

Resistance

The opposition to the flow of electrical current. Resistance is measured in Ohms.

A speaker with a sensitivity rating that's 3 dB higher than another speaker's

only needs half as much power to deliver the same amount of sound.

Sound Pressure Level (SPL)

SPL is measured in dB — an acoustic measurement of sound energy. One dB SPL is the smallest audible difference in sound level. 0dB SPL is the threshold of human hearing, while noise measuring 120dB can damage your hearing.

Answer 2

You have good db. That sensetivity.  The higher this number the more effiecent your speaker.  Your amp my be bridgable but with two 4 ohm  subs with a sigle voice coil you can't bridge to 4 ohm or two ohms,  If you amp is 2 ohm stable If possible get dual 4 ohm voice coils or some type of combination to get down to 2 ohms.  Ohm is measure of resistance.  The lower the number the easier it is for you amp to release the power but your amp must be capable of running a 2 ohms or you will blow it.   102 db is pretty good as far as I'm concern.  They say for every 3 db upward your music is twice as loud.  That means don't get a 5000 watt sub with a db ratiing of 60db.  91dbs and up are good in my book.  But are the Pioneer speaker you have c.e.a. compliant.  That means they have been tested and they tell the truth on the specs.   All car audio doesn't have to do this.

Answer 3

I've never seen 12" 102db sensitive bass speaker. it is not real. its overrated....