Dear Tang,
you can buy,to try, electronic crossover First Watt B4,price list 1.500 usd and sound is better and more natural of Pass XVR1,my friend has both,and use Ayon amp on mid high,if match will be ok,you will have deep bass and dense mid bass with Lamm and transparency of Ayon on mid high and also using Ayon only on mid high they will sound more natural and fast,because signal don't go to drive bass frequency
you can buy,to try, electronic crossover First Watt B4,price list 1.500 usd and sound is better and more natural of Pass XVR1,my friend has both,and use Ayon amp on mid high,if match will be ok,you will have deep bass and dense mid bass with Lamm and transparency of Ayon on mid high and also using Ayon only on mid high they will sound more natural and fast,because signal don't go to drive bass frequency