Manufacturer Part Number: Q1R A precisely manufactured German diaphragm is mated to a large shielded motor structure. The result is a tweeter with excellent timbre and low distortion characteristics. Key Features: Extremely flat response from 1 500-20 000 Hz 1-1/8 soft dome delivers natural response with great dispersion Double rear chamber design lowers Fs and improves damping Popular replacement tweeter for the classic AR3a speaker system HiVi Q1R 1-1/8 Textile Dome Tweeter A precisely manufactured German diaphragm is mated to a large shielded motor structure. The result is a tweeter with excellent timbre and low distortion characteristics. Transient response is improved via the use of ferrofluid and a copper-clad aluminum voice coil. Some of our customers have used this tweeter as a drop in replacement for the popular classic AR3a speaker from the 70 s. Note that they have recommended adding a .07mh 18 gauge inductor in parallel with the tweeter to more mimic the original AR3a sound. Product Details BrandHiViModelQ1RPart Number297-417UPC844632025525Unit of MeasureEachWeight1 Product Specifications Cone / Dome Diameter1.125 Cutout Diameter3.63Tweeter TypeSoft DomePower Handling (RMS)15 WattsImpedance6ΩFrequency Response2 500 to 20 000HzSensitivity89dB 2.83V/1m Thiele-Small Parameters Resonant Frequency (Fs)1000HzDC Resistance (Re)5.3Ω Mounting Information Overall Outside Diameter4.56 Depth1.63