Project SPH-30X/8

Hi guys

I've just finished a pair of small desktop speakers with the driver Monacor SPH-30X.

This little 3" full range has gotten some pretty good reviews and I must say it sounds promising and with surprisingly good bass.

Although it sounds promising the frequency response reveals that the sound can probably be improved even more. See the attached graph(s).

Before measuring the response I would have guessed that a strong notch around 10khz and then some baffle step attenuation would have done the trick, but since it has a dip around 3 khz that I dont want any deeper i'm now leaning towards multiple notch filters.

The solution I have so far includes 3 notch filters, but since two of them deals with the dip at 10 khz, maybe it can be done more effectively. I'm hoping that some of you guys will take a look and tell me what you think :-)

I've uploaded my frequency and impedance measurement, but also the lspCAD project file, and REW measurements to my site:

https://www.sites.google.com/site/di...0x-8-fullrange

Please note that the site is kinda outdated and not really finished, so its not allowed to look around :D

Regards
Peter

Attached Images

	IMG_20130326_143252.jpg (448.1 KB)
	IMG_20130327_131406.jpg (348.2 KB)
	IMG_20130329_161202.jpg (558.6 KB)
	IMG_20130329_182325.jpg (250.0 KB)
	IMG_20130421_161507.jpg (368.0 KB)
	SPH-30X_lspCAD.png (57.8 KB)
	SPH-30X_frequency_resp.png (301.9 KB)