Sony Hi-Res mobile audio system is available to buy as a set or separately.
3- New, never used XM-GS4s
1- Lightly used, in very good condition RSX-GS9

Run between 6-12 channels of audio from this kit. Highly regarded as some of the best Amplifiers & possibly the best Headunits/ Processors made for mobile audio!

Update: Individual component pricing
RSX-GS9- $Sold (0 available)
XM-GS4- $Sold (0 available)

Product highlights:
General Features:
high-res digital media receiver (does not play CDs)
no built-in amplifier
built-in Bluetooth for hands-free calling and audio streaming (external mic included)
NFC easy pairing
plays MP3, FLAC, WAV, ALAC, AAC, WMA, AIFF, and DSD files
32-bit ES9018S digital-to-analog converter for superior processing
MUSES 8920E high-end operation amp for exceptional realism
Smartphone Features :
limited iPod, iPhone, and iPad control
Audio Features
DSEE HX (Digital Sound Enhancement Engine) improves sound of compressed music files
low- and high-pass filters
10-band EQ
time alignment
inputs: front and rear USB ports; front and rear auxiliary inputs
outputs: 6-channel preamp outputs (5-volt front, rear, sub)
optical digital output with 96kHz/48kHz sample rates

Product highlights:
4-channel car amplifier
70 watts RMS x 4 at 4 ohms (80 watts RMS x 4 at 2 ohms)
160 watts RMS x 2 at 4 ohms in bridged mode (4-ohm stable in bridged mode)
CEA-2006 compliant
frequency response: 10-100,000 Hz
separate variable high- and low-pass filters for front and rear channels (50-300 Hz, 12 dB per octave)
separate variable subsonic filters for front and rear channels (6-70 Hz, 12 dB/octave)
separate bass boosts for front and rear channels (0-10 dB at 40 Hz)
preamp and speaker-level inputs
cooling fan
fuse rating: 30A x 2
8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
10-3/4"W x 2-1/8"H x 8"D

Price is plus Shipping & any additional incurred fees, such as PayPal.

Any additional information, requests or otherwise, please feel free to comment or message me directly!