Thiel Owners

unsound - indeed an equalizer opens myriad possibilities. Bill would have the knowledge to orchestrate an attenuation scheme; he would also have the chops to orchestrate alternative power for the EQ. A large part of the cost and limitation of any active device is centered on its AC power supply. What if we borrowed DC from the preamp, perhaps via post-installed 40 volt phantom power (ubiquitous in the pro world for microphones, etc.) to power the EQ from the preamp’s power supply. And so forth and so on.

audiotweak - no we didn’t explore resistively vented enclosures. However, we did notice that leaky cabinets altered the bass response, acting like larger cabinets, and did muse how wonderful it would be to get a larger-acting enclosure via leaking.

Presently I am reading about aperiodic venting with an eye to combining it with equalization for a low-order bass rolloff that reaches deep with possibly less reactivity while requiring less EQ than a sealed box.

So much to learn, so little time.

@tomthiel, I think with the advancements in digital technology many might soon find traditional preamps superfluous.
 Wouldn’t such “leaky” cabinets compromise time integrity? 

Tom,

Thanks for your reply. Not many speakers claim to be aperiodic..
Dynaco A series were all of such design. I maybe sold a hundred of these back in the 70's. I new they had great bass for their size but didn't know why then but do now and I am trying to learn more.

A great device I used to tremendous benefit was a Mcintosh MQ series you could dial in a preset boost but my system was bi-amped then circa 1980.  Tom  AllegroSound * McIntosh MQ-101 Environmental Equalizer *  

unsound - I don't know how leaky / resistive enclosures would affect time response. My hunch is that the 2nd order closed box response would hold true while acting like a larger enclosure which of course throws off all the Thiele/Small paramater matching analysis. We treated leaks as a serious error to be fixed and never explored the realm. However, an aperiodic vent would be predictable and therefore could match different T/S paramaters for a different result. I don't know enough to comment further.