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In the Forum: Melquiades Amplifier
In the Thread: A proper implementation of low-pass filters
Post Subject: Low PassPosted by IslandPink on: 12/31/2010
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Romy
This topic is relevant to me currently as I am attempting to get a 750Hz low-pass into a valve (tube) amp that is driving a bass section ( Supravox 285GMF in an Onken cab ).
I have run through a few options in my head but can see various problems. I look at the implementation you have used in Melquiades bass or bass-mid section, using R/C at the front ; this looks good -  however, if I have a volume-pot preceeding the filter , it looks like the crossover point will be embuggered by the varying input resistance. I can't see exactly how this is dealt with in your own system, but I can see it causing probs in mine.
Are there any other methods you considered but maybe rejected in the context of your direct-coupled amp ?

I have found the Melquiades threads very useful anyway . I'm attempting to blend an Onken (Jensen) bass with a 288-H ( Great Plains ) on Azurahorn . It was going to be 2nd-order on the horn, but now listening to the two with 1st-order crossovers , it sounds much better than I expected . Useful to see that you rejected higher-order crossovers early-on .

Mark

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