The SSM2380 data sheet contains data for 8Ω and 4Ω speakers.Can you provide any data for 3Ω or 2Ω speakers?
Data Sheet SSM2380 (Rev. A)
Rev. A | Page 8 of 32
Figure 4. THD + N vs. Output Power into 8 Ω, Gain = 6 dB
Figure 6. THD + N vs. Frequency, VDD = 5 V, RL = 8 Ω, Gain = 6 dB
The SSM2380 is not designed to support 2ohm/ 3ohm loads. The minimum load impedance would be 4ohm.