With some friends we set aside a day to test some variations around the we13a using the necessary tools. I say around as the 13a is the dominating factor. Not just physical perspective but also sound wide. The job is to delicately integrate above and below. Not unlike the other big WE horns in that regard. We used here we92a amplifier, the other one is a single end 300b with we171a OPT’s. Tubes from engraved 274a’s to the 300’s in same caliber. We4181’s in “open air” to open baffle.
Fun day….thanks W2 and D