Alpine X-A70F 700 W RMS X-Series Class-D 4-Channel 2 ohm Stable Amplifier Alpine introduces the all-new X-Series of high-grade speakers and amplifiers. These products have been engineered and tuned to create a perfect match for extraordinarily dynamic, realistic sound reproduction, and a spatial sound impression... The X-A70F is running 2 sets of MTX SS7 custom mounted in the front and rear doors of my MKZ, with a X-A90M powering a single X-W12D4 in a ported box tuned to 34Hz the sound is Amazing. Easily puts the "premium" 8 channel ford system to shame in absolutely every aspect.
Alpine X-A70F - 4-channel digital amplifier. Power: 4 x 120 Watt RMS to 4 x 175 Watt RMS to 2 x 350 Watt RMS bridged to 4 max. Power: 1400 W. Dimensions and weight: 297 mm x 50.8 mm x 192 mm (W x H x D). Weight: 3.2 kg. Technical specifications: Adjustable crossover network: HPF / LPF / OFF: 50Hz - 400Hz (-12dB/Oct. ) Remote control signal level: 0 to -20 dB channel 3-4 fuse: 2x 35 A.. Channel Design: The Alpine X-A70F is a 4-channel amplifier, which can be configured for 3-channel or 2-channel performance. It is stable down to 2Ω in stereo, and 4Ω when bridged. CTA 2006 Compliant: The X-A70F's power ratings are measured according to the strict standards dictated by the Consumer Technology Association (CTA). These standards.