Instruction: Evaluate each product title in the given list, assess its relevance to the given query, and then arrange the products in descending order of relevance, with the most relevant product at the top of the ranked list.

Input:
Query: behringer headphone
Product list:
A: BEHRINGER 8-Channel High-Power Headphones Mixing and Distribution Amplifier, Silver & Black, (HA8000V2)
B: Edifier H840 Audiophile Over-The-Ear Headphones - Hi-Fi Over-Ear Noise-Isolating Audiophile Closed Monitor Stereo Headphone - Black
Answer: B,A