Passive Line Filters (BD-Design)

by Bert , Friday, February 16, 2007, 16:34 (6289 days ago)

For people who do not understand how passive line filters work as implemented within all of our systems. I copied the text from a page present at the BD-Design site for a long time already:

All Oris DIY bass systems are "active" designs, requiring a dedicated amplifier (we recommend our BD30 DIY) and an active or passive (recommended) line level filter to match the bass system to an Oris horn.

The need for a separate amplifier is due to the very high sensitivity of the Oris horn (ranging from 103dB to 112dB depending on drive unit). A separate bass amplifier allows matching the lower sensitivity bass systems to the higher sensitivity horns. It also allows avoidance of the degrading effects of passive crossover networks, which are particularly bad for bass performance.

The active approach does require a line level filter to tune the bass to match the main horns. For this we recommend a passive filter design that draws a speaker level signal from the amplifier driving the main horns. This approach uses the bass amplifier as a "signal booster", reflecting the sonic characteristics of the main amplifier, and allowing for easy bass integration and some fine tuning of performance through the choice of amplifier.

I hope this helps to explain...

Ciao,

Bert

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BD-Design - Only the Best!

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