Xmsjsiy Universal Rca Level Controller Car Audio Amplifier Volume Control Knob The rca amplifier is to control the gain level / volume of devices connected to the car stereo, such as speaker, amplifier, bass, etc. It is manufactured with premium material for durable and long lasting use. Excellent workmanship ensures its high practicability. Strict quality inspectation system insures you premium product and safe usage. Great and helpful accessory for your car. Remote bass level control turning knob, great accessory for car and home subwoofers, work well for your spl amp/ppl amp, balance desktop speaker system, great for stereo that does not have a bass tuner. It is easy to install. Two rca inner hole inputs and two rca inner hole outputs are installed in or under the instrument panel. You can quickly adjust the volume of the on-board amplifier without additional wiring. Simple in and out connections,no additional wiring needed.Mini size easy to installation by DIY without manuals. Package Include: 1*car audio amplifier 2* mounting screws Product Features The car rca audio amplifier is control the gain level / volume of devices connected to the car stereo,such as speaker, amplifier, bass,etc.Dash mount amplifier level control for volume adjustment.Dash mount rca amplifier level control is used to adjust amplifier gain, power level, stereo, equalizer or crossover volume when you driving The universal rca level controller for car is made from high quality materials and metal for optimal signal transfer this amplifier controller offers high-quality signal transmission with rca composite cables.Adds subwoof level control to any head unit. Perfect for balancing the system to change music styles RCA level controller perfect for balancing the system to change music styles, control your sub-woofer output, you can set the subwoofer on maximum gain and then vary the knob to taste as per genre or media good fit for car, motorcycle, speakers, home.Stereo rca input and output. Connect the rca output connector to the car stereo and the input rca connector to the device, no additional wires are required. With especially good fit for car, motorcycle, speakers, home This amplifier controller made of high-quality chipset and elegant metal casing, perfect transmission of music signal. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!