Rerurn to Romy the Cat's Site

Ronnie wrote:

The room modes I thought I had to battle suddenly disappeared the other day when I decided to try stuffing the boxes a bit. Suddenly everything fell into place :-) I guess I can do better than using little cushions though... Do you have a "chemical name" for that furniture stuffing you lined the walls with? Will I find it in IKEA or the wood/hardware store?

I relay do not know what it is. I bought in a regular local cloth shop. It is very light and has hair from one side. In fact it should not be anything special. The idea is to eliminate the parallel surfaces and to inject a very slight diffusion/adsorption into the tope reflections at HF.

Ronnie wrote:

I have tried a pair of Alted 902 in 400Hz tractrix instead of the Fostex, but haven't been able to make them sing at all. So far they look like little trumpets and sound like little trumpets.

The Altec 902 never was a good driver. No mater what you do by a ferrite magnet can’t serve HF.  However you did used then in their atrocious original Altec “caned” horns… it must be horrible….

Ronnie wrote:

Two more LF boxes are under construction.

You do need to work with LF. Never run then empty-boxed but glue the box with 3-5cm of high-density foam. It will extend the virtual volume of the boxes. Also do consider adding other LF section(s) atop. The driver you used for LF are very soft clipping driver but still do not stress them – you will not damage then but the stressing them will affect sound: a driver per channel is too little for your room.

Ronnie wrote:

The system sounds absolutely lovely to me.

Those type configurations are always winning. Do not forget unload the LF form the upperbass horn and be carefully with Fane’s HF. It might run quite high in this horn but the HF extension (over 700Hz -800Hz) will not be as good as the lower knee of you MF driver. In fact it is not exactly knows which of your driver will handle 700Hz-800Hz better: Upper bass of MF. You have to decide to yourself. At some frequencies the MF will begin to suffocate and at some frequencies the upper-bass driver will have too heavy cone and will sound too dirty.  Still if you have  400Hz tractrix then you must not dive lower then 750-800Hz with this chanal…

Rgs,
Romy the caT

PS: BTW, do not forget drive the horns with a SET....

Rerurn to Romy the Cat's Site