Instruction: Rank the products A, B, C, ... based on their relevance to the provided query, and produce a ranked list with the most relevant product positioned at the top of the list.

Input:
Query: pa subwoofer amp with crossover
Product list:
A: Seismic Audio - Pair of Jack Plates with Dual Speakon and Dual 1/4" PA/DJ Speaker Cabinet
B: Rockville RPA5 1000w Peak / 400w RMS (200 x 2) 2 Channel Power Amplifier Pro/DJ Amp
C: Yamaha 10" 100W Powered Subwoofer - Black (NS-SW100BL)
Answer: B,C,A