JBL PartyBox 520 400W Portable Party Speaker $530 at Electronics.woot! $530 $880 Price drop! Ends 4/30 at 10PM PT. Electronics.woot! has the JBL PartyBox 520 400W Portable Party Speaker (JBLPARTYBOX520AM) for $530 with free shipping for Amazon Prime members or $6 shipping. Has multi-color LED lightshow, 2x 7.5" woofers & 2x 1" tweeters. $530 retail: $880 (-$20.00) Price Drop See Price History for $880 (Used $660) Posted by DrBatman04/21/2026 at 01:53 PM PT