@sri_srikrishna 1. No idea. Maybe not significant.
2. Resistance varies by manufacturer, yes, but 4x is always going to be less resistance than 1x
Still, I suspect the filter cost, accounting for replacement, is going to be about the same regardless of the number of filters used.
@sri_srikrishna 1。不知道。也许不重要。
2.电阻因制造商而异，是的，但4x的电阻总是小于1x
尽管如此，我怀疑过滤器的成本，考虑到更换，无论使用多少个过滤器，都将大致相同。