As one speaker unit can’t deliver full range music (50Hz to 20000Hz) and then had to be divided into three ways as the woofer, midrange and tweeter. So that passive crossover RCL network inserted between amp output and speaker units, this reduces transparency and punch. Active crossover works in front of the power amps and…
Please see my Altec HF driver collection: 290E GIANT VOICE driver X 4 (large scale driver) 288 driver X 2 (large scale driver) 806 driver X 2 (small scale driver) See picture: The sound quality of large scale driver is much better in thickness and warm at middle frequency. Nowadays most available stocks in market…
The famous altec 288 midrange driver and 515 woofer are the chief characters , and , from my own opinion the 288 is the key component. 288 (115 db) has to be played with altec horns, for home audio I personally do not recommend multi cell horns, I will suggest 311-90 , 311-60 or 329A…