mwhouston wrote:
My DIY speaker buddy Ron did a lot of testing of the Beyma drivers.There were a few critical difference between the testing and the TS figures posted by Beyma. From the test results the speaker box only needs to be 30ltr with a 100mm diameter port @ 136mm long. These speakers will not go super low but will produce weighty articulated bass.
Ron was particularly impressed with the tweeter section. He ran it up and down a number of times from 500hz to 20K listening for dips and peaks which he claims even expensive tweeters will have. The Beyma tweeter section is first class and was extremely linear right through the audible spectrum. Ron believes mid and beyond should sound particularly good.
One thing I was shocked with was the woofer section rolled-off heavily from 2K and beyond. The specs say 4K. WRONG! So now we have a Xover point - 2KHz. Also the tweeter section measured 12ohms and not 16ohms at 2K. So Xovers will be based on 12ohms.
I will have to switchable Xovers - 1st order at 2100KHz and 3rd order at 2K. When using the 0.5W amp 1st order with switchable in and out choke on the woofer. When using any other amps 3rd order.
Why third order? This is one of Ron's little tricks. 3rd order Xover image like hell. He was able to demonstrate this with small gorgeous little three-way bookshelves he made for some one else. On a live orchestral piece the speakers vanished never to return and the room filled full of music. Stunning. The secret is a 3rd order Xover.
I have a box design already and now to get the design of to my box builder - Don.
Hi, I have your same speakers and I would like to ask you 2 questions: 1) Could you please tell me the parameters measured?
2) If you had to redo them, what would you change about your project?
Thanks so much
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