This amplifier does actually work, the problem is that after being on for a short period of time it will occasionally emit a squeaky squeal sound, this is a common problem with all of of these built in amplifiers from earlier Definitive Technology speakers. They are great sounding speakers and very convenient to have the built in sub woofer to save floor space. The amplifier plate screws are included. Please email with any questions you may have.

This amplifier does actually work, the problem is that after being on for a short period of time it will occasionally emit a squeaky squeal sound, this is a common problem with all of of these built in amplifiers from earlier Definitive Technology speakers. They are great sounding speakers and very convenient to have the built in sub woofer to save floor space. The amplifier plate screws are included. Please email with any questions you may have.

Security Number and Security Tag Recorded BBuilt-in 300-watt subwoofer ampDefinitive Technology Bi-Polar Tower BP-8040ST Floor Speakers 300w subwooferProduct highlights:Forward Focused Bipolar Array™ technology for lifelike imaging and pinpoint localizationBalanced Dual Surround System (BDSS) driver technology places rubber surrounds on both the outer and inner edges of each speaker cone for improved clarityfrequency response 25-30,000 Hz (±3 dB)sensitivity 92 dB8-ohm impedancehandles up to 300 wattsfront array: dual 3-1/2 mids and 1 pure aluminum dome tweeterrear array: 3-1/2 mid and 1 pure aluminum dome tweeter8 woofer with dual 8 passive radiatorsbuilt-in 300-watt subwoofer ampone set of 5-way binding postshigh-gloss black finish on top and bottom caps with cloth grille-wrapped enclosure10-9/16W x 39-1/16H x 12-1/4D (with included stabilizer feet)

This amplifier does actually work, the problem is that after being on for a short period of time it will occasionally emit a squeaky squeal sound, this is a common problem with all of of these built in amplifiers from earlier Definitive Technology speakers. They are great sounding speakers and very convenient to have the built in sub woofer to save floor space. The amplifier plate screws are included. Please email with any questions you may have.

Security Number and Security Tag Recorded BBuilt-in 300-watt subwoofer ampDefinitive Technology Bi-Polar Tower BP-8040ST Floor Speakers 300w subwooferProduct highlights:Forward Focused Bipolar Array™ technology for lifelike imaging and pinpoint localizationBalanced Dual Surround System (BDSS) driver technology places rubber surrounds on both the outer and inner edges of each speaker cone for improved clarityfrequency response 25-30,000 Hz (±3 dB)sensitivity 92 dB8-ohm impedancehandles up to 300 wattsfront array: dual 3-1/2 mids and 1 pure aluminum dome tweeterrear array: 3-1/2 mid and 1 pure aluminum dome tweeter8 woofer with dual 8 passive radiatorsbuilt-in 300-watt subwoofer ampone set of 5-way binding postshigh-gloss black finish on top and bottom caps with cloth grille-wrapped enclosure10-9/16W x 39-1/16H x 12-1/4D (with included stabilizer feet)