Polk Audio’s three-piece Reference Monitor speaker system, the RM-3000, consists of two small satellite speakers and a subwoofer module. Although this general configuration is currently enjoying increased popularity, Polk’s version differs from the others in many of its design details.Each of the satellite speakers is a miniature two-way system with a 3-1/2-inch “woofer” operating above 200 Hz and crossing over at approximately 4,000 Hz to a 3/4-inch dome tweeter. The tweeter is protected against burnout by an internal auto reset protection device that cuts off its signal until the power has been reduced to a safe level. The tweeter is stepped back about 1-1/4 inches from the plane of the woofer to provide proper time alignment of the outputs of the two drivers.The satellite enclosure is made of a high-density, non-resonant polymer aggregate similar to the material used for high-quality kitchen countertops. The smooth, glassy exterior is resistant to physical damage, and each of the satellites— which measure only 6-3/4 inches high, 4-1/4 inches wide, and 5 inches deep, including the molded plastic grilles—weighs a surprisingly heavy 4-1/2 pounds. The crossovers contain second-order low-pass and high-pass sections designed to complement the time alignment of the drivers. In addition to its crossover network, each satellite also contains a 200-hz high-pass filter that protects it from being damaged by high-level low-frequency signals.The subwoofer contains two 6-1/2-inch cone drivers, each driven by one stereo channel. For each channel, the appropriate satellite, the subwoofer, and the amplifier are simply wired in parallel. The subwoofer enclosure, which measures 20-1/4 inches wide, 13 inches deep, and 10 inches high, is supported 2 inches above the floor on four rubber feet. Its interior is divided into two separate sections o? different volumes, with the drivers mounted on the dividing partition. The rear surfaces of the two driver cones face the sealed volume, which provides the necessary stiffness for their proper operation. In the other section, the pressure generated by the drivers is coupled to a 10-inch passive radiator mounted on the bottom of the cabinet, facing the floor. According to Polk, the passive-radiator coupling reproduces the low frequencies more efficiently than a simple port radiator, while the mass and size of the passive cone (called the “sub-bass” radiator) attenuate the higher frequencies, providing an 18-dB-per-octave rolloff matching the low-frequency rolloff of the satellites. Since each driver is connected to one of the stereo channels, the two channels are acoustically blended throughout the subwoofer’s operating frequency range (which contains virtually no directional information). Although the subwoofer’s response rolls off naturally above 170 Hz, the unit also contains a first-order low-pass filter to avoid wasting amplifier power above its operating range.

Pair of Polk Audio RM3000 Monitor Series-2 Satellite White Bookshelf Speakers. Pair of Polk Audio RM3000 Monitor Series-2 Satellite White Bookshelf Speakers. Good used condition. Some discoloring due to age. Working.

Pair of Polk Audio RM3000 Monitor Series-2 Satellite White Speakers Physical Grade: BFunctional Grade: A This item has been tested to power on and play audio on our test bench. To our knowledge, it is in good working order. There are some marks and wear on the casing from general use. See pictures for further details. No further testing has been performed. Shipping Disclaimer: We do our best to ensure that our items arrive safely. Sometimes, however, they do sustain shipping damage. In the unlikely event that this happens to your item, please contact us immediately, and we will resolve the situation for you. Accessories Included:Power Cable: Not IncludedRemote: Not IncludedOther Accessories: Not Included Terms of Sale: Please email any questions prior to bidding. Please allow up to one business day for a reply. We do not ensure compatibility with various accessories, software, or other hardware. Please do your own research before purchasing.Our business hours are Monday-Friday 8:00AM-4:00PM CST.Note that sales tax may be applicable depending on buyer location.Be sure to check your shipping address. We are not responsible for items shipped to an old, incorrect, or invalid shipping address.Local pickup is only an option for our freight listings. We are otherwise not open to the public.