I personally use this fabulous little device to design speakers and measure them (obviously not to make coffee...lol) This, together with a decent microphone that Audio Tools can supply and an iPad, you are very well equipped to assess the performance of a speaker or its individual drivers. At 600$, it costs the same as a vintage bottle of Ducru Beaucaillou, my favourite Saint-Julien - see www.ourfrenchimpressions.com for more details - and it lasts much longer!
If you are not a professional user, then you might want to go back one step and use their iTestMic for about 200$
I recommended to Perry that he buys this more affordable version and he did!
It is really a cute little device and it has given us a way to compare measurements across the Pacific Ocean.
That's it for the hardware, but obviously what makes the system complete and useable is the App.
This is quite a smart product, as you can buy only the measurement modules that you need and they are usually around 20$ each. Even if you were to buy all of them, I think it would set you back maybe 400$ and you would have a complete set of tools very close to the 20,000$ HP3582 I used to use in the 80s, or the 40K$ for a Rhode & Schwarz UPV analyser (but this is the ultimate machine and I do dream to own one, if I were to become an active speaker designer again!
I have used a measurement method for many years which is not textbook at all, but which has given me very good auditive results without resorting to an anechoic chamber. I won't reveal all the details here, but let say that these measurements are made in the listening room, and, as such, give a realistic measure of the behaviour of the speaker under test in to a REAL environment. You can see on the curve above that this speaker is flat in the room from30Hz to 20KHz =/- 5dB and roughly =/- 3dB from 300Hz to 12kHz, and trust me, it sounds spectacular! I am awaiting a new prototype that should improve the lower medium down to 150Hz for a better match with the active subwoofer, but I won't be able to talk about this for another month or so, due to confidentiality arrangements with my client.
Born in France, well travelled, relocated to Sydney in 1997.