5 FULL RANGE DRIVER DRIVER

I wouldn't call it dynamic range, but more like 'good presence' in the vocal region. The midrange has a liveliness that I was uncertain if I found this to be good trait or not. It does not have any of the harshness commonly associated with whizzer cones. Further listening I concluded that it rivals some planar and ribbon tweeters.

5 FULL RANGE DRIVER DRIVER

My initial impressions on the driver is that the highs sounded like a good dome tweeter. For example 6.4kHz has an astonishing low distortion of only 0.073% IMD! It is not understood why there is a sharp peak in distortion at 583Hz at +85dB SPL however this does correspond to a impedance blip. I found that the Seas FA22RCZ achieves very low numbers if the output SPL does not exceed 75dB SPL at 1 meter, particularly in upper midrange and treble. This driver rewards with low distortion if listening below 80dB SPL.īelow is the intermodulation distortion results when tested at various SPL levels starting at 75dB and rising to 95dB. Below is a comparison showing the effect of the notch filter.īelow is a schematic of the circuit I settled on.īelow is the burst decay response of the driver once the BSC and LCR were in place.īelow is the harmonic distortion sweep at various SPL levels. Implementing a notch at 3kHz improved the overall sound noticeably. The inductor can be in the range from 1mH - 1.25mH. One should definitely experiment between the different value resistors to achieve the overall subjective sound they are looking for. The grey response curve lacked liveliness and had a less 'open' sound. Below is a comparison for reference between an 8.2ohm (grey) and 4.7ohm(red). For example I found that a 8.2ohm resistor brought down the highs too much. I found that one could easily over do the baffle step compensation which killed the life of the sound. Overall the rising response can be tamed with a traditional baffle step circuit.Įventually I settled on a baffle step circuit comprising a 1.25mH air core inductor (16 gage) and a 4.7ohm resistor. I attempted to remove this peak with an LCR filter which I will talk about later in this blog post. The response has a gentle rising response until we see a peak centered around 3kHz. Mounted in my 50 liter mini-onken produces the following response. Open basket design with acoustically transparent spider.Deep drawn copper cap on pole piece for reduced intermodulation distortion.Reasonable QTS for traditional reflex alignment bass cabinet.Information on this driver can be found here. This blog post features a full test on the Seas FA22RCZ 8' fullrange driver.

5 full range driver