sorry to ask many question here, how about the Signal to Noise Ratio, will it cause any different for SQ?

MTX : Signal-To-Noise Ratio (1 Watt) = 68 dB
Alpine : S/N 80dBA (Ref. 1W into 4Ohm) Signal to Noise (S/N): 110dBA (Reference to Rated Power)

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alvK

2002 Toyota Corolla
Alpine CDA-9815
Alpine SPX-177R
Alpine SPR-17LS
Alpine SWX-1242D