AMC 2100 INFINITY PERFECT 12s

[LLDeese]

[AMC 2100] Solid State Amplifier, 2-Channel, 2 x 100w
SPECIFICATIONS
Bridging ModeRated power into 8 ohm (IHF) 250 W
Rated T.H.D. 20Hz-20kHz 0.03%
Clipping power into 8 ohm >300 W
Dynamic power into 8 ohm (IHF) 500 W
2 Channel ModeRated power into 8 ohm (IHF) 100 W
Rated T.H.D. 20Hz-20kHz 0.03%
Clipping power into 8 ohm 115 W
Dynamic power into 8 ohm (IHF) 150 W
Current limit into 0.1 ohm and 1 ohm 32 Amps
Damping factor >200
Input sensitivity for 1W / Rated power into 8 ohm 100mV / 150pF
Input impedance 22 K-ohm / 150pF
Frequency response 20Hz-20kHz +/- 0.2 dB
Frequency response -3dB 5Hz / 110kHz
Signal to noise ratio "A" WTD (ref. 1W / 8 ohm) 100 dB
Separation 20Hz-20kHz >80 dB

Infinity Kappa Perfect 12.1 12" 4-ohm subwoofer
Size 12 -inch
Impedance 4 ohms
Cone Material Aluminum
Surround Material Butyl rubber
Sealed Box Volume (cubic feet) 1
Ported Box Volume (cubic feet) 1.75
Port diameter (inches) 4
Port length (inches) 12.33
Free-Air Yes
Dual Voice Coil No
Sensitivity 96dB
Frequency Response 18 - 0.2k Hz
RMS Power Range (Watts) 75-350
Peak Power Handling (Watts) 1400
Top Mount Depth (inches) 6 1/8
Bottom Mount Depth (inches) 6 7/8
Cutout Diameter or Length (inches) 10 15/16
Vas (liters) 83.28
Fs (Hz) 23.32
Qts 0.44
Xmax (millimeters) 14.15


I have a amc 2100 hooked to two Infinity perfect 12s. The amp clips off with out warning. I have tried hooking them in 2 ohm and 8 ohm loads ,,,bridged mono and in stereo. The amp still turns off and has to be turned off to reset it. The gain is about 2/3rds. the way up. The woofers are in two, 1 cubic foot sealed enclosures. When playing them I start to turn them up loud and they sound awsome then a big bass note will come along and the amp will clip. Usually a woofer will distort a little so you know to turn it down,,, but it gives no warning. Please help me,,,,do I need more power???

[XEAGLEKEEPER]

Sounds like the amps power supply ie. transformer doesn't have enough grunt for your application.........You may need a beefier amp. IMHO

[LLDeese]

What amplifier under $400 would you recommend?

[XEAGLEKEEPER]

For $400 you could build a real beefy 200+ wpc amplifier that could rival alot of commercial amps of higher cost. Here is one that I am currently constructing...............Check it out!
http://sound.westhost.com/project68.htm

[LLDeese]

I would rather buy an amplifier, than to build one. Wondering if pro audio amplifiers are a better choice than a home power amplifier. Such as a BEHRINGER EP1500.

[XEAGLEKEEPER]

Try to find something with at least 200 wpc and stable with a 4 ohm load. The AMC as near as I can tell by the spec sheet never stated anything about its stability with anything less than 8 ohm. Those Infinity drivers need alot of power to really make them sing.

[LLDeese]

How important is the damping factor of an amplifier. Is a 300 watt per channel with a 3000 damping factor better than a 400 watt amp with a 100 damping factor??? Can you tell the difference??? What if the damping factor not listed in the specs does it really matter???