Tom C
Major Contributor
Your beautiful and intriguing. Are you able to comment on why you chose Be dome rather than ribbon?
While it does feel a little odd at first eating the national icon it should be noted they are not in any way endangered. About 25 million people in Australia and 50 million roos! The ones in this area are not too big, but if you come across a biggun it can be a tad scary. Mind you not as scary as the tiger snake that tried to get in the house the other day.What's the meat taste like?
Will post some tomorrow.Do you have any distortion measurements? (sorry if you already showed them and I missed it) I am wondering if the passive radiators allow you to do better than the SPK5.
My wife said that to me onceYour beautiful and intriguing. Are you able to comment on why you chose Be dome rather than ribbon?
Australian animals are just amazing, as long as you ignore the fact that most of them will kill you as soon as look at you.I know there's a Like button, but those photos are too good for a mere Like button.
The ones in this area are not too big, but if you come across a biggun it can be a tad scary.
Power handling is 250 watts (IEC continuous)Very interested! Hoping for decent maximum power limit, extended warranty that matches similar classed products and maybe a sweet launch deal to seal that 2020 Christmas present!
Power handling is 250 watts (IEC continuous)
Huntsmen spider are fabulous. Mostly harmless apart from the fact that they are massive, hide under the sun visor in your car and will make you poop your pants.
My bad, wrong casual terminology.View attachment 91398
The IEC268-5 pink noise (filtered, 6dB crest factor or is it something else?) for 100hrs is 80W on the Purifi data sheet. Are really you specifying a 250W continuous on the system?
There's no way a single 6.5" voicecoil could dissipate 1/4 Kilowatt on an actual continuous (100hr) basis.
From what I understand, the "long term maximum power" is not equal to continuous. Rated noise power 100hr is equal to "long term power". But then I have speakers rated with the IEC 268-5 like these below:
View attachment 91399
Consider each of these speakers has 2x 6.5" woofers, 2x 4"bass/mids and a 30mm treble driver. 5 drivers per cabinet. I would believe they could dissipate 150W of pink noise for 100Hrs with 4-5 voice coils to get rid of the heat.
Do you have a copy of IEC268-5 or the relevant parts including the terms to be used?
I am very curious about the outcome of your project.Dont take the following measurements as definitive there are some limitations and some final tweaking required.
Yes there have been a few challenges with the crossover, but I hope you understand I wont be going into too much detailI am very curious about the outcome of your project.
Do you also have a spectrogram with stepped color or the angular frequency responses of deg0-90? It is very difficult to see details.
I would have expected that the axis frequency response in the range 1.7 - 5kHz would have to be provided with a relatively wide dip to compensate for the strong widening in the horizontal radiation in this frequency range.
As I have simulations for the Bliesma tweeter already on my hard disk, it is not difficult to simulate it with the cabinet of the Sointuva, which shows the "unusual" behaviour of this tweeter.
However, the simulations are closer to the behaviour of the Bliesma-Al version than the Bliesma-Be version, because the former behaves more like an ideal 34mm tweeter.
Comparing only the simulated axis frequency response and the deg60 frequency response, the very wide horizontal directivity of the tweeter becomes obvious (low resolution, valid <10kHz):
View attachment 92389
However, the challenge lies in the crossover tuning, which has to compensate for the pronounced interaction of the baffle with the tweeter.
This is nicely shown by looking at the axis frequency responses normalized to the axis frequency response of the tweeter (low resolution, valid <10kHz):
View attachment 92390
The big challenge in my eyes is to get the range 1.5 - 5kHz under control (since the vertical directivity in this range also expands in radiation).
Or does the Bliesma-Be tweeter behave completely different in its radiation than the Al version?