I have decided to build a set of active bi-amped speakers for my cottage. I'll use a minidsp for the active crossover and 100w t amp modules for power.
I've selected and purchased the BG neo8pdr for >800hz (plan is for an open baffle) and the Morel MW-266 for <800 hz which will be in a cabinet.
Like many of us I want to balance cabinet size with F3. Using speakerbuilder software I can model a ported cabinet of 95 litres (as large as I can go given the space) that displays F3 about 30hz and an F10 below 20hz. This puts significant group delay below 20hz with the intention that I use the active crossover EQ to highpass at 20hz, managing the group delay.
The possible problem is that the model shows I hit xmax with 5watts between 30hz - 40hz. 5 watts for these drivers produces about 93db @ 1m.
Whereas at 70hz I can get to about 102db before hitting xmax.
So, my question is how loud will these perceptually get at 30hz? I don't need a lot of volume but I do need to be able to listen comfortably to them. Typical listening distance is about 10'. The cottage itself is an open concept about 800 sq feet on the main floor with a 200 sq ft loft and a peaked roof over the loft.
The alternative is a sealed box of similar dimension that models F3 ~ 35hz and F10 ~23 hz and hits xmax at 7w about 25hz
I appreciate all thoughts!
Jeff
I've selected and purchased the BG neo8pdr for >800hz (plan is for an open baffle) and the Morel MW-266 for <800 hz which will be in a cabinet.
Like many of us I want to balance cabinet size with F3. Using speakerbuilder software I can model a ported cabinet of 95 litres (as large as I can go given the space) that displays F3 about 30hz and an F10 below 20hz. This puts significant group delay below 20hz with the intention that I use the active crossover EQ to highpass at 20hz, managing the group delay.
The possible problem is that the model shows I hit xmax with 5watts between 30hz - 40hz. 5 watts for these drivers produces about 93db @ 1m.
Whereas at 70hz I can get to about 102db before hitting xmax.
So, my question is how loud will these perceptually get at 30hz? I don't need a lot of volume but I do need to be able to listen comfortably to them. Typical listening distance is about 10'. The cottage itself is an open concept about 800 sq feet on the main floor with a 200 sq ft loft and a peaked roof over the loft.
The alternative is a sealed box of similar dimension that models F3 ~ 35hz and F10 ~23 hz and hits xmax at 7w about 25hz
I appreciate all thoughts!
Jeff