As one of its Black Friday ad deals, Best Buy offers the MartinLogan Dynamo 10" 600W Subwoofer for $399.98 with free shipping. (Crutchfield charges the same.) That's $300 off list and $49 less than other retailers. Deal ends November 11. Features:
300-watt continuous power amplifier (600-watt peak)
24Hz to 200Hz frequency response
20,000 ohms impedance
rear-mounted 3-position phase switch
There are many ways to get cheap and even free services and goods after reaching a certain age.