Just sold off my JmLab Electra CC900 center speaker on 10th Dec 2005. Managed to get a rather good price for it. The proceeds will be used to finance my next DIY project - will be rather ambitious this time in terms of drivers selection;

TW - 1x ScanSpeak D2904-700000
MID - 2x 12M/4631G00
WF - 2x 18W8545-00

At present, center duty is covered by ‘ol faithful B&W DM603.

Took delivery of 42pcs of acoustic foams from GCD Acoustics.

Bought a combi of 12x Egg Crate and 30x Spikey tiles - Grey. It did not occur to me earlier on how the f* that I’ll be mounting them on the walls. To cut to the chase, ended up spending a trip to IKEA for some lumber to fix up a makeshift cabinet to contain the darn thing.

Have plans to use the EC type for lining the interior of my new DIY speakers.

Been reading up on room acoustics treatments and especially standing waves or room modes, in most cases this deals with the lower register. The biggest tip in on speaker palcement. Skipping the complex maths, to eliminate anything below 80Hz (BASS), I’ll have to treat up to the 3rd harmonics - effectively, this works out to 1/4 the distance of EACH axis (L/W/H). Assumptions here is of coz two facing parallel walls. Odd shaped rooms are too complex to calculate and only thing left is experiment and trial+error.

Thus, having moved my WUF to 1/4 the length of the room, the sudden boom previously found when playing back specific tracks are largely eliminated!! :D

As for the foams, afte putting up two tower of foams, the highs are much more focused and mids less blurred. Addressing the 1st reflection via diffusion or absorbtion makes a hugh difference.

There you have it, another step on the journey to audio nirvana.