My M3A was having attenuator issues and I was told that its five years of use required the attenuators to be replaced. The manufacture then suggested to have the sonically superior 2000 main printed wire board upgraded which included the attenuators.
They assured me they had the parts necessary to make the upgrade and it would take two or three weeks. I sent the pre off with a check. After five months of difficult communication and parts availability issues I demanded the unit be returned immediately regardless of its condition. Almost three weeks later it arrived upgraded.
Unfortunately, my acoustic memory couldn't discern such a slight, if any, improvement and sold it.
If you find the dual mono volume and the general layout acceptable the Bruce Moore preamplifier is a substantial improvement.
They assured me they had the parts necessary to make the upgrade and it would take two or three weeks. I sent the pre off with a check. After five months of difficult communication and parts availability issues I demanded the unit be returned immediately regardless of its condition. Almost three weeks later it arrived upgraded.
Unfortunately, my acoustic memory couldn't discern such a slight, if any, improvement and sold it.
If you find the dual mono volume and the general layout acceptable the Bruce Moore preamplifier is a substantial improvement.