PS: This product link have 2 order options which is for HiVi DMA-A and DMB-A, both speaker items use pure aluminum panel with same outer diameter, but each speaker Fs is much different as the voice coil diameter and material is different, Thank you
1, Here is the datasheet of HiVi DMB-A which is 5ohm/80W RMS, Fs=700Hz, 92db/mw, OD=145mm
2, Here is the datasheet of HiVi DMA-A which is 5ohm/80W RMS, Fs=630Hz,92db/mw, OD=145mm
use better voice coil design and material,so the frequency response is more flat compared to DMB-A