Just installed a new headunit on the Camry XLE to replaced the OEM radio/cassette/6 CD changer. The new headunit has preamp outputs so I went for the integrating harness to reuse the OEM premium JBL power amplifier(s). Turns out the existing amp is nosy with a hissing sound during silent passages even at low volumes - not very good S/N ratio, that is. The new headunit preamp outputs are clean as tested out on my headphone and harman/kardon home stereo. Surprised as the new headunit is considered well below premium.
Anyway, did you guys noticed this your OEM JBL premium system or has Toyota fixed this on newer models?