Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Wharfedale is a best-kept secret in the audio world

Wharfedale speakers have always impressed me and the Topaz SW-8 is no exception. I have seen some less than glowing reviews but I believe if the sub is set up correctly in a quality system, it will shine. I am currently using it to augment the bass in a 2 channel system. I have it wired in-line with Wharfedale Sapphire SP-83's. I have a Luxman R-115 sending the signal and the results are defined, deep, musical notes in the register below what the SP-83's can deliver. The sub benefits from spikes and I have added 20lbs of weight inside the amp side of the enclosure. Setting the crossover took seconds, checked the phase and was completely satisfied with the musicality of the little sub. I believe a larger sub should be employed for explosive home theater and have not tried the SW-8 in that environment. For a 2 channel system in a small to medium sized room, it cannot be beat. I picked this one up for $40.