Compression Horn Tweeter, Cerwin Vega C5G, CS5, T-123 Compression Horn Tweeter, Cerwin Vega Style C5G, CS5, Part # T-123 Specs: Size: 3-1/2" (4-1/2" diagonally), Hole cut-out: 2-3/4", Depth: 2-1/2", Magnet: 8 oz, Voice coil: 1" Ferro Fluid Cooled, Impedance: 8 ohms, Re: 6.8 ohms, Power: 40 watts RMS, 80 watts max, Response: 4 kHz - 20 kHz, Sensitivity: 100 dB New and improved version of original Cerwin Vega tweeter. Ferro Fluid Cooled! Fits many classics Cerwin Vega models such as D-1, D-2, D-3, D-5, D-7, D-9 and many other. See the description below for a full list. Simply Speakers has been offering Quality Replacement Parts since 1992!