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Kept the original Pioneer AVH-6788 head unit flashed up to the latest firmware avail from Toyota: https://www.rav4world.com/threads/just-had-entune-infotainment-update.298947/post-2704559
- Removed the 6 existing stock 20W Pioneer speakers and replaced with 2 JBL CLUB3020 3ohm + 4 JBL CLUB6520 3ohm ($32 + $90 = $122) via amazon prime
- Installed Soundstream ST4.1200D Stealth Series 1200W Class D 4 chan amp $113 via amazon prime
4 Mosuch 6.5inch plastic black speaker adapter ($15)
VOODOO 18 AWG Gauge 9 Conductor Speed Blue Wire Speaker Trailer Copper Stranded (20 FT) ($20)
XHF Conductor Compact Connectors Lever-Nut (SPL-2, 25PCS) ($16)
Lever-Nut Assortment Conductor Compact Wire Connectors PCT-212(25 PCS) PCT-213(25 PCS) PCT-214(25 PCS) PCT-215(25 PCS) 100PCS ($26)
$312 in parts total
Notes:
Speaker wires leaving G4 connector of Pioneer head unit are aluminum conductor and cannot be soldered hence why various Lever-Nuts are used for interconnects
Stealth amp hidden away in the glove box that is still functional (open/close as show in the gif above)
Manual SOS button operates and readback audio is fed to right-hand 3.5inch JBL CLUB3020 only (Telematics audio no longer comes thru right-hand door speaker since high-level amp input is taken prior to DCM)
No need to worry about splicing amp aux turn on since the ST4.1200D will auto detect high-level speaker signal and will turn on/off whenever the head unit is on (no thumps)
Optional:
Quimat Updated 2.4" TFT Digital Oscilloscope Kit with Power Supply and BNC-Clip Cable Probe Q15001 (Assembled Finished Machine)
If you don't have a cheap Oscilloscope, you should consider something like the above in order to match the gains of the amp properly to avoid distortion at higher volume levels.
The class D stealth amp is stable using the 3ohm JBL speakers chosen but has a tendency to distort > Volume 46 from the Pioneer head unit as I measured on my RAV4 (Volume level 0-45 is clean stable using 1kHz & 50Hz 0dB test tones)
Questions!?