I am researching the Lyra design, before building my first set of speakers. The page on building them is not too detailed as far as the enclosures are concerned. Does anyone have more details as far as dampening materials? Also are there any recommended modifications to the box itself(volume or dimensions)? I'd heard something about standing waves and driver height as though they might be a problem. I was thinking of adding a dummy area to the bottom which would be open at the back and putting the crossover there for future tweaking. Any feedback?

Thanks,

Mark

Don't worry about standing wave. Just make sure you build a strong box with good bracing. The bass driver is placed at an offset with respect to the height of the cab so I guess standing wave shouldn't be a problem either. I think if the bass is at the middle of the speaker height then it could be a problem.

Also speaker cab is not big enough for standing wave to be a problem.

As far damping material, if you're box is strong and it is of ported, you will need very little damping. I've build the Eros whose enclosure is designed for critically damped, I used almost no damping material at all.

Hello Mark...

I make my Lyra's out of 5/8 inch Partical Board. I was worried about the Particale board being "too lively" so I lined the insides of the box with a "camping mat" bought at K-Mart for 3 or $4.00. It worked GREAT and my cabinet is just as "dead" as 3/4" MDF.

I built my Lyra's with a Vifa D26 tweeter that I happened to have on hand, they are otherwise "as the Reverend specified".

I like mine a LOT - they are better than described in the Lyra text.

Also built the Veritas'....Sonic Heaven!

-=[ Bruce ]=-