Newb DIY'er Looking for drivers selection advice.

[dagdamor67]

I have 2 15" MTX Thunder 2000 T2158 sub woofers laying around and I would like to build some 3-way speakers around them.

I would appreciate any advice on what mid range and tweeter drivers would be best to use with these sub woofers.

Here are the sub specs from the MTX documentation:

Free Air Resonance: 19 Hz
Volume Acoustic Suspension: 20.03 ft3 (567.4 l)
Total Q: .43
Electrical Q: .49
Mechanical Q: 3.67
DC Resistance: 6.22 Ohm
Linear Excursion (One-Way): .33" (8.4mm)
Effective Piston Diameter: 12.99" (.3300m)
RMS Power Handling: 250 Watts
Total Power Handling: 500 Watts
Efficiency 1w/1m: 91 dB
Reference Efficiency: 0.72%
Frequency Response: 19-2.5 Khz
Voice Coil Inductance: 1.94 mH
Gap Height: .312" (7.9mm)
Voice Coil Height: .887" (22.5mm)
Motor Force: 14.02 N/A
Compliance: .552 mm/N
Total Moving Mass: 131.3 g
Moving Mass of Driver: 116.9 g
Suspension Losses: 4.20
Effective Surface Area: 132.6 in2 (.0855 m2)

[SciFiDogSD]

For starters you want to look at a midrange 5 1/4" to 6 1/2" woofer or mid dome that has slightly higher spl then your sub if at all possible and many quality tweeters to pick from, will be in that will be in the low to mid 90's to pick from!

[dagdamor67]

Do I need to make sure they are roughly the same wattage? If not do I need an additional amp for the subs since they would be higher wattage than say a receiver at 90w per channel at 8 ohms?

[SciFiDogSD]

For tweeter 20 watts sustained a good start, you can go higher and most have a SPL of 90 dB or higher & makes them efficent! The mid range is the hardest to work with and 45 to 50 watts sustained a good start, but need that SPL up there or it can be forced to work harder to achive a good midrange! Maybe a seperate amp a good thing for a 15" sub. As a rule mtm's or 2-ways, the woofer uses roughly 80% of the power, so in 3 ways its essential you have a efficent mid range