Alpine SPR-13S Type R Split System x2 system includes two 5-1/4" woofers, 2 tweeters, and 2 crossovers hybrid layered-pulp woofer with rubber surround 1" textile ring-dome tweeter external crossovers — 12 dB per octave (high-pass) and 6 dB per octave (low-pass) 7-level tweeter adjustment power range: 8-100 watts RMS (300 watts peak power) frequency response: 70-27,000 Hz sensitivity: 86 dB top-mount depth: 2-3/16" Alpine SWR 1222D x2 Alpine SWR 1222D Type R 12" (30cm) subwoofer 1500W Dual 2-Ohm Subwoofer The Alpine SWR-1222D is a 12'' dual 2-ohm voice coil. The cone is Kevlar reinforced with Santoprene rubber surround for extended life. Features Power Handling: 200-500 watts RMS (250 watts per coil Peak Power: 1500 watts Sensitivity: 85 dB * Frequency Handling: 23-500 Hz Alpine iDA-X100 x1 Alpine iDA-X100 Digital Media Receiver Dedicated for your iPod * • Remote Control: Remote Control Ready * • Mute: Built-in Audio Mute * • Audio Interrupt: Audio Interrupt Input * • Remote Turn-On: Amplifier Remote Turn-On Output * • Power Antenna Lead: Power Antenna Output * • Dimmer: Dimmer Input * • Detachable Face Plate: Detachable Controls * • DIN Trim Plate: Detachable Trim Plate * • Calender: Built-In Calender * • Clock: Built-In Clock * • Fader & Balance: Fader & Balance Controls * • Bass & Treble: Bass & Treble Controls * • Steering Wheel Control: Steering Wheel Control Ready * • Auxiliary Input: Versatile-Link Ready (KCA-121B Auxiliary Input) * • DAC: 24-Bit Burr Brown DAC * • Bluetooth®: Bluetooth Ready * • PreOut: 3 PreOut (2V PreOut) * • USB Input: Full Speed USB Connection or USB Memory/Portable Device * • Easy Navigating: Quick Search * • Playback: MP3/AAC/WMA Playback * • Illumination Buttons: Blue/Red Illuminated Buttons * • Face Color: Dark Silver * • iPersonalize: i-Personalize (Wallpaper Only) * • Control Type: Double-Action Encoder * • Display: 2.2'' High Resolution TFT Color Display * • CD Changer: CD Changer Control * • Power Output: 50W x 4 High Power Amplifier * • Steering Wheel Remote ready * • IMPRINT ready (PXA-H100 required) * • 24-Bit Burr Brown DA I would like to stick to Alpine, Thanks