@edelbby Sir that older amp will make any modern speaker
sound very bad. The resolution of modern speakers are going to resolve every little problem you have with your older vintage amp that was never really made with the best parts. You really should sell that thing and buy a different amplifier and different level speaker. You’ll have a better result. Those vintage amps are too warm and fuzzy and have too much distortion for higher resolution modern speakers with more complicated crossovers and impedance dips. The old amps are too slow to keep up.