Oh one last thing...you need to watch out if you have a head unit that has over 4-5v of signal. The 2500 will not enjoy an 8v preout head unit.
Here's my HU specs:
Main Unit Mounting Depth (DIN): 6.3"
Hideaway TV Tuner Dimensions: 4.75" L x 2.75" W x 0.80" H
LCD Resolution: 1.15 megapixels
Playback Formats: DVD (region 1 only), CD, VCD, SVCD, Photo CD, MP3
Video Format: NTSC
DVD Frequency Response: 20-20,000 Hz
DVD Signal-to-Noise (S/N) Ratio: 90 dB
DVD Dynamic Range: 90 dB
Total Harmonic Distortion (THD): 0.05%
Preamp (main zone) Outputs: 6 Channels Audio, 1 Composite Video
2nd Zone Outputs: 1 Stereo Audio, 1 Composite Video
Preamp Output Voltage: 2 volts RMS
Preamp Inputs: 2 Stereo Audio, 2 Composite Video
Amplifier Power (Peak): 22W x 4
Amplifier Power (RMS): 18W x 4 (CEA-2006 Certified)
FM Sensitivity: 9 dBf
CD Changer Control: No