Roger Mafli

I found a pair CP-1 in my cave and so I started researching. One tweeter was replaced by a not original one. I found a K-75 (orignal) similar driver called B-52 Matrix. Is that justifiable? Specifications: Frequency Response: 38 HZ - 20kHz +- 4db Sound Pressure Level: 100 dB one Watt, one meter 123 dB one meter maximum continous output Power input: 200 watts Impedance: 8 ohms nominal, 5.4 ohms minimum at 150 Hz Weight: 96 lbs. (43.5 kg) Drivers: K-44-E woofer, K-57 midrange, K-75 tweeter