Specification AudioOutputMode1 : Surround AudioOutputMode2 : Stereo Brand : Acoustic Audio by Goldwood BulletPoint1 : MOUNTABLE INDOOR WIRED SPEAKERS - Traditional passive speaker design, simply drive power from your amplifier or receiver BulletPoint2 : HIGH QUALITY - Full Range sound coverage with 2.5" Polypropylene woofers, frequency response is 150Hz-20 kHz with 88dB at 8ohm BulletPoint3 : DURABLE AND MOUNTABLE - Black ABS sealed cabinets with spring loaded raw wire connectors and mounting brackets. Big sound from a compact speaker size of (H x W X D) 3.5" x 3.5" x 4.5" each BulletPoint4 : SYSTEM REQUIREMENTS - Any amp or receiver with raw speaker wire outputs, power from your amp should be no less than 20 and no more than 200 watts per channel, CL3 or raw speaker wire to connect your amp to the speakers BulletPoint5 : WHAT'S IN THE BOX - 20 Acoustic Audio by Goldwood AA321B speakers, mounting brackets with hardware, instruction manual. Use for home theater surround sound, whole house audio systems, business or retail installations, patios, decks, pool and spa settings Color : Black CompatibleWithVehicleType : Car ControllerType : Corded electric ControlMethod : application ExternallyAssignedProductIdentifier1 : 849155025410 ExternallyAssignedProductIdentifier2 : 0849155025410 FrequencyResponse : 20 KHz Impedance : 8 ohm IncludedComponents : Speakers IsWaterproof : FALSE ItemName : Acoustic Audio AA321B Mountable Indoor Speakers 4000 Watts Black 10 Pair Pack AA321B-10Pr ItemPackageDimensions_Height : 23.5 inches ItemPackageDimensions_Length : 12 inches ItemPackageDimensions_Width : 9.5 inches ItemPackageQuantity : 1 ItemTypeKeyword : surround-sound-speaker-systems Manufacturer : Acoustic Audio by Goldwood Material : Acrylonitrile Butadiene Styrene (ABS) ModelName : Mountable Indoor Speakers 4000 Watts Black 10 Pair Pack ModelNumber : AA321B-10Pr MountingType : Shelf Mount NumberOfItems : 20 PartNumber : AA321B-10Pr PowerSourceType : Corded Electric ProductSiteLaunchDate : 2014-06-10T18:21:27.860Z RecommendedUsesForProduct : Polypropylene SpeakerAmplificationType : Passive SpeakerConnectivity : Wired SpeakerSize : 3.5 inches SpeakersMaximumOutputPower : 4000 watts SpeakerType : Bookshelf StreetDate : 2014-06-10T00:00:01Z SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 20 UnspscCode : 52161512 WaterResistanceLevel : not_water_resistant Wattage : 4000 watts