With help from Danny , jparkhur and Dave, here is a full range driver speaker product. The pictures are of the driver and baffles from jparkhur for the Dayton PS220-8 driver as a test driver and three of the 8” GR-Research servo woofers. There is a separate cabinet for each of the new servo amp to drive the 3 servo woofers.
The reason behind the project is to see if using new impulse response correction techniques we can improve the sound of any full range driver. The Dayton 8” full range driver is a test case, as it is a very good sounding driver.
My part of the project is the supercomputer digital crossover. The idea is that I measure each Dayton full range driver and do impulse response correction and crossover for each driver. This makes logisitics interesting as each driver has to be cataloged with the data. They will be sold as pairs with the digital crossover for a specific speaker.
The digital crossover will have two different stereo output stages. One with be passively coupled from the DAC to the power amp to full range driver. This will help protect the full range driver from extended low frequency excursion. The other will be a DC coupled output stage for extended bass response to drive the servo amps.
The digital crossover and DAC’s will not use any linear phase filtering. The input will be either via asynchronous USB directly from a PC music server or via a 24bit/192KHz A/D converter. The processing rate will be 32bit/192KHz floating point math for all four channels.
The digital crossover prototype will only have A/D conversion until the full production crossover is completed. There will be software for a PC Music Server to run digital volume control and input switching between the A/D and USB inputs.
Working on final pricing on the digital crossover system and driver pair.
Will post in the thread progress as it is made along the way.
Presenting The Monolith speaker.