I know about the BAs the other reason I went to tweeter and not a local mom and pop op. I had no idea the polk sr6500 existed till yesterday I think they are fresh of the paper and into production hence no one knows about them yet. These are also designed like the BAs to be slim fit for placement in more vehicles, European and american adapter plates for screw placement, the works.
The Sweeter Tweeter
The tweeter can be used either as a separate component or post mounted coaxially with the driver. Two flush mount cups (straight and angled) and two coaxial posts (straight and coaxial) are provided for the ultimate in installation flexibility.
22mm Ring Radiator Tweeter - Ring radiator tweeters have inherently few performance-robbing resonance modes. The result is flat, extended frequency response beyond 40kHz, low distortion, excellent dynamics, exceptional detail and transparency.
Neodymium Motor Structure with Faraday Cap The copper “Faraday Cap“ on the pole piece flattens the impedance curve, lowers distortion, extends and improves high frequency response.
High Frequency Waveguide Prevents phase cancellations for smooth, uniform frequency response and wide dispersion.
Aerated Polypropylene Cone: The mid/bass driver cone is Aerated Polypropylene in which air is injected into Polypropylene to produce a honeycomb structure that serves to stiffen and damp the cone without adding mass. This is the same cone technology employed in Polk‘s critically acclaimed LSi Series audiophile-grade home speaker line.
Removable Phase Plug for smooth, flat frequency response even off-axis. Remove the phase plug and replace it with either a straight or angled tweeter mounting post to transform the SR6500 into the absolute best coaxial speaker on the planet.
Butyl Rubber Surround- Further damps cone resonance for wider response and lower distortion. High resistance to UV and temperature extremes means long life and reliability.
Neodymium Magnet Structure - Finite Element Analysis (FEA) design makes the powerful neodymium magnet more linear for lower distortion and higher definition. Small Neo magnet makes the SR6500 easier to fit into more locations and vehicles.
Die Cast Aluminum Basket for greater resistance to resonance.
2 1/2” Mounting depth plus supplied spacer rings ensure easy installation into a wide variety of cars.
U.S. & Euro hole patterns to line up with the mounting screw holes of virtually any vehicle.
1 1/2” Voice Coil For better power handling and bass output.
Polyimide Voice Coil Former for high thermal stability (rated to 220°C) high power handling and low mass.
4-Way Gold Plated Input Terminals Corrosion resistant terminals accept fastons, spade lugs and bare wire.
Vent Holes in the basket equalize air pressure on both sides of the spider for more linear travel, flatter frequency response and lower distortion.