Adorama offers two Mackie Reference Multimedia 4" 50-watt Powered Monitor Speakers for $99.99 with free shipping. That's the lowest price we could find by $50, although we saw it for $5 less via a rebate a year ago. These speakers feature a 50-watt amplifier, 4" woofers, 3/4" silk-dome tweeters, front-facing headphone jack, and frequency range of 70Hz to 20kHz.