The more reflective the surface, the greater the bounce. The mounting clamps will fit 1.5", 1.75", 1.85" & 2" bars . UTV Stereos, Speakers, and Audio Kits 2 Person Intercom System with Digital Radio and AlphaBass Headsets by Rugged Radios $2,196.00 $1,866.60 Product Details 2 Person Intercom System with Behind-The-Head Headset Kit by Rugged Radios (1) $1,313.00 $1,116.05 Product Details 2 Person Intercom System with Over-The-Head Headset Kit by Rugged Radios Any old iPhone 4s or later will work. Hard to argue with good sound when it hits you. (will give more mid and low frequency )And dont put simply holes as vents ,insert an small pvc as shown in image. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/a\/a0\/Construct-a-Speaker-Enclosure-for-a-Door-Panel-Step-1.jpg\/v4-460px-Construct-a-Speaker-Enclosure-for-a-Door-Panel-Step-1.jpg","bigUrl":"\/images\/thumb\/a\/a0\/Construct-a-Speaker-Enclosure-for-a-Door-Panel-Step-1.jpg\/aid1423560-v4-728px-Construct-a-Speaker-Enclosure-for-a-Door-Panel-Step-1.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"
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