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In the Forum: Horn-Loaded Speakers
In the Thread: Macondo’s Midbass Project – the grown up time.
Post Subject: Lowpass crossover: to be or not to be.Posted by Romy the Cat on: 10/7/2010
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How lucky I am! The Melquiades bass channel at full throttle gives me just enough gain to power my Midbass horn to the reference level of my MF channels.  That is truly a very lucky thing. The biggest dilemma I am thinking now is type of the filter to use in the Milq’s bass channel input. I can go RCRC filter and I can go LC filters. Both will work fine. Currently I implemented RCRC filter (thanks, Dima for help with mathematics) and I am contemplating if it make sense for me to go LC.  I would need a 10H indictor and I have found that Sowter has a very cook, u-metal enclosed, miniature choke #9810:

http://www.sowter.co.uk/acatalog/SOWTER_TRANSFORMERS_EQ_INDUCTORS_6.html

This is exactly what I need but doe it worth it? Briefly let me to lay down the cans and pros…

LC is better because along with cap it will write a perfect second order curve that will be consisted to the very stop band. This will allow having a stable Bessel Q and absolutely no phase or amplitude anomalies. In RCRC filter the first filtering section talks to the second one and the curve reportedly if screwee….

RCRC is better for MY application because a bandpass signal goes only across 2 resistor. The HF that are not the part of bandpass are going via caps to the ground and get shorted. So, the sound worsening that happen in caps does not go to load. Also, the bandpass signal does not go over 3 miles of wire in he indictor.

Honesty I have no idea what to pick as I have do recognize a rational on both sides. Did anybody compare those two type of filters sonically?

Midbass_progress_165.JPG

The caT

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