usually they do but sometimes it will be built in to the main speaker
Bi-amping means using a crossover filter to separate high and low frequencies, and sending them to two separate amplifiers, which power the high- and low-frequency drivers in the speaker separately. This is in contrast to the use of a single amp and a passive crossover filter. The primary advantage to bi-amping is lower distortion, due to a) more accurate, active crossover circuitry, b) better impedance matching between the amp and the driver, c) no passive components between the amp and the drivers, and d) no electrical interaction between the drivers. The frequency response is improved, also, due to better phase matching between drivers in the crossover range.
Purchase a subwoofer speaker (also known as a component subwoofer). The component subwoofer is the actual speaker you'll be mounting into the enclosure you build. Crutchfield.com is an excellent resource for reviewing and purchasing component subwoofers
The making of electricity Computer component Speaker component
You want to test resistance to see if there is a break in the windings. Set your voltmeter to Ohms.
The reason for using a capacitor is to prevent low frequencies reaching the tweeter. Low frequencies will affect the output quality of the tweeter at best and can easily damage it. Bass speakers are frequently driven with a coil which is (approximately) the opposite of a capacitor in that they block high frequencies and pass low frequencies. However, the presence of high frequencies in a bass speaker tend not to cause any noticeable issues. The speaker itself is a coil so it tends to attenuate the high frequency currents without additional coils. Furthermore, the high frequencies won't be heard because the speaker simply doesn't move at those frequencies. The science of crossovers for speakers is complex. To get the right crossover for a high and low frequency driver takes a significant amount of calculation and the speakers themselves have an effect of the characteristics. The advice above is very general and the results of not using a crossover are unpredictable. If possible, it is generally more effective to use a line level crossover. This will process the signal and separate it to two or three signals. It does it without relying on the characteristics of the speakers so it provides a very accurate crossover. However, as well as the cost of the line level crossover, each speaker needs its own amplifier channel so costs can rise significantly.
It's a CROSSOVER, they are almost always built into the speaker.
The factory amp is actually located on each speaker like a crossover.
The subwoofer's crossover network??? best match Roger S. 487
periods
A subwoofer is a speaker. If you want to know if is possible to convert it into a full-range speaker, then yes, it is. You have to add a tweeter and crossover to the box, but the complexity in doing this and the quality of the results will show that it isn't worth it.
The SE's had an internal shelf / splitter removed to improve the bass responce and they tweaked with the crossover.
To access the crossover components in a Leak sandwich speaker: 1. Undo the nut in the centre of the rear panel - use a very large screwdriver to do this. 2. Unclip the front grille. 3. Undo the retaining screws of the bass driver. 4. Lift out the bass driver. The crossover components are now visible on the block of wood that fits between the rear of the bass driver and the rear panel of the enclosure.