Ping pong is fun though... I didnt claim Sir Winston Churchill first penned the words... I did say:
"I support the great Sir Winston Churchill philosophy which he summarised in the Houses of Parliament in 1941:"
Series 3-way is live!
I put my test crossovers in enclosures and took measurements. Tweaked with DSP PEQ.
Previous post with picture of the baffle and drivers.
Other post showing how I was using 3-way active DSP until today.
Measurement image shows:
), but the general approximation is valuable for me.
The active 3-way sounded really good and looks better +/- overall, but I’m happy to be able to easily switch out power amps again. AND bring my Iron Pre back from its slumber.
Edit: I rotated the little coils in the boxes to be perpendicular to the big coils after an astute comment from @xrk971.
I put my test crossovers in enclosures and took measurements. Tweaked with DSP PEQ.
Previous post with picture of the baffle and drivers.
Other post showing how I was using 3-way active DSP until today.
Measurement image shows:
- Red - Before EQ w/ series crossover
- Gold - After EQ w/ series crossover
- Cyan - 3-way active DSP crossover
- Violet - EQ w/ former parallel crossover
- Measurements taken with MiniDSP umik and REW from the listening position (~2m), on-axis with the mid, psychoacoustic smoothing
), but the general approximation is valuable for me.The active 3-way sounded really good and looks better +/- overall, but I’m happy to be able to easily switch out power amps again. AND bring my Iron Pre back from its slumber.
Edit: I rotated the little coils in the boxes to be perpendicular to the big coils after an astute comment from @xrk971.
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I guess now that Thigpen’s patent has expired we will see more of those. I have run across those before, thanx for the meory jog.
There are some interetsing planars and ESLs coming out of Europe.
dave
@bjarnetv: Had I been able to PM you with this question then I would have done, so apologies to everyone for this not being a gallery post. Seven years on, are you still happy with Audiolense ? I ask because I am planning on buying it for my speaker projects. Feel free to PM me to avoid further OT posts !Yeah, those were the days when open baffles and controlled dispersion was all the rage
i remember reading through your blog and all the other "open baffle sites" when designing my speakers, and it was real exciting how easy it had become trying out different baffle designs, cardioid vs dipole, etc, due to the emergence of cheap dsp and measurement mics.
i have to admit though, i was never totally happy with the crossovers before moving to a more powerful DSP platform than the minidsp 4x10, and i was often tempted to start anew with something requiring bit less EQ.
i kind of wondered what happened since you stopped building more speakers, so i'm glad to hear that the reason was you being content with your design.
if you haven't yet, you should really try out some advanced TTD dsp yourself though.
the difference compared to regular frequency response XO is pretty mind-boggling.
There's a bunch of norwegian DIY'ers, including myself that just transitioned to Audiolense, and i think we're all pretty happy we took the plunge, even though there was quite a bit of suffering for those of us transitioning from a itunes/mac to a jriver/windows based playback chain