Title: Quality Issues
Product review: Second time around I tried a Polk Audio sub woofer. First one worked OK, but the amplifier went out after 18 month of sporadic use. Thought I give it another try with this one (price seems right), but it did not even work from the start. Instead of a clear rich bass, nothing but low frequency rumblings and humming. Checked different input source and wires to be sure. Sent back the same day.
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