Best Sound For Revolution, Magnum, Aristo Series Decoders: Parallel Speaker Wiring!
Posted on 31. July 2009
It is a known technical fact that speakers wired in "parallel" as opposed to wired in "series" produce more sound as the parallel connection gives more power to each speaker. This assumes that the amplifer has enough output power to drive the additional speaker.
The Quantum decoders were designed with special components to utilize the parallel connection, but most prior applications notes stated to use a "series connection" to minimize heating and power consumption. This was done until the parallel connection could be thoroughly tested.
After a year of field testing we are recommending that all Quantum HO/S/O/G scale decoders can support parallel speaker connections for 8 Ohm speakers.
Some other sound decoder manufacturers do not recommend the parallel connections.
Here are some examples of parallel and series speaker connections: