Right at 1:32 I hear two layers:
LAYER 1: Sub Bass
– This could be as simple as an overdriven sine wave or filtered saw wave.
LAYER 2: Pitch-shifted piano or bell sample
– I don’t think this layer is a synth. It sounds like a piano or bell-like sample that’s been pitch-shifted down. Perhaps some light distortion and hard compression applied to it as well. And some ambience, like a very small room reverb.