Some years back, I had the FDP 900.6 (as well as an FDP 900.1 mono).
They were fantastic little amps.
I've never heard of the FDP Sport. Is it also designed by Steve Mantz?
New Car... Stock Stereo
Looks like separate chokes for each channel. My Pioneer PRS is built like that.
Mazda CX5 AF GB10, AF GB25, AF GB60, JL VX800/8i, AF GB12 sealed, Mmats M1400.1
Ford F150 AF GB10, AF GB25, JLC5, JL twk88/Pioneer D8604, Mosconi Pico, JBL Club 5501, Sundown SD3-10 ported @ 30 Hz
Sienna AF GB15, Audiofrog GS690, JL twk88/Pioneer D9500F, JBL GTX500, Alpine SWS10 ported @ 31 Hz
https://www.diymobileaudio.com/threa.../#post-5608901