The Halo dampers are most definitely effective and I use
them about 75% up with ARC dampers about 25% up. I also
have used the Mapleshade brass dampers with good sonic
results, but also lost several tubes due to overheating.
I finally had to return them. There was a promise from
Mapleshade to replace a couple of the tubes, but it never
happened. Patience and persistence can definitely raise
the bar in a system.
them about 75% up with ARC dampers about 25% up. I also
have used the Mapleshade brass dampers with good sonic
results, but also lost several tubes due to overheating.
I finally had to return them. There was a promise from
Mapleshade to replace a couple of the tubes, but it never
happened. Patience and persistence can definitely raise
the bar in a system.