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How much does a Zobel network and its components affect the sound of speakers?

Regardless of amplification, my Merlin Audio MMI monitors have always sounded bettter using the Merlin RC Master (Zobel) Networks consisting of a Dueland capacitor and a Caddock resistor in series bringing the tweeter terminals. I've heard that some have replaced the networks using Jupiter capacitors and Vishay resistors and different wires and spades. My question is, How much do the networks and their components and associated values affect the sound? At times my speakers, while having superb resolving ability, can occasionally sound edgy, particularly noticable with voices at higher volumes.
pmboyd

Showing 2 responses by dgarretson

dgarretson
2,612 posts
 
"Moreover, why has Merlin Audio (now defunct) experimented with their network components, before settling on the Dueland/Caddock combo?"

@pmboyd Bobby used a Hovland capacitor in that position before switching to Duelund. He mention to me at an audio show that the Duelund cap in the Zobel was a significant improvement. Its low .01uf value in the Zobel was a relatively inexpensive upgrade and did not much upset the overall price point of the speaker. He also used cryoed Caddock MP resistors and Hovland mylar capacitors throughout in the crossover. If you want to improve the speaker, consider replacing the Hovlands inside with better parts.
dgarretson
2,612 posts
 
Caddock MPs are 10W resistors.  Vishay/Texas Components Z-foil are .25W.  If you want to experiment, use 10W alternatives such as Path, Duelund, Mills, or ebayed Russian SSG silver mica.  
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