Recent content by Peter Morris

The 405 should work - the response is a bit bumpy and it will require more EQ to get it flat but at full power it would produce about 2 dB more SPL. Other drivers that look a good are Beyma's 12MC700 and Faital Pro 12FH520. I don't think these were available when I started this project.

Sorry I don't have 4594HE settings for the HF950, but I do have settings for the 4594 with a HF950 3-way for a Lake LM26 if that helps I can share.

As I said above, I think the ME464, and this new design is fantastic. Its also great to see a company with such a passion for audio willing to put the engineering time into designing this product. I do appreciate the time and the process with software like COMSOL etc .to design a new horn and...

Making the horn is the easy part, getting the shape right to achieve the desired pattern control over the operating range with minimum distortion and reflections etc. etc . etc. is the hard part, Its not a trivial exercise.

I'm sure if size and weight are not an issue this will be a beautiful speaker, and I want a pair - but I also want B&C to release a smaller 90 degree version of this horn 15" wide for those projects that need a different compromise. :) There are lots of nice horns of a suitable size to match a...

PM sent ...

Send me a PM and I can send you the DWG file ... Peter

Can't imagine 7.5mm would make any noticeable difference Chris.

Hi Max You are 100% correct, the original PM90 was tuned at 80Hz (I had to look it up :-). After that every one want a 60 degree box. It used the 18sound horn and the box had to be made deeper and a bit wider. This increased the volume a little. The port size was unchanged so it was tuned...

From memory there is about 55 -60L inside the PM90/60 but its tuned lower than that - you need to do a SIM with horn response as I suspect 95 - 97 is too high, it needs to be more like 60- 70Hz depending on the driver to get a useful response.

The 12NDH-4 produces a good response in the PM90/60, the 12NDH- 3 gives an even better / smoother response but has less X-max. I guess it becomes a matter of where you want to cross to the subs etc. etc. In the PM90/60 the response will not be flat, quite bumpy and MUST be EQ-ed flat...

A couple of comments ... The quick sim I did indicates the 12NDH-4 would be one of the best choices you can get for the PM90/60. If you use the XT1464 horn in the standard configuration only BMS driver will fit. (also check that the 4594 will still fit with the 12NDH-4). B&C DCX464 /HF950...

You can’t move the horn to the centre unless you make the box wider or reduce the wall angle. I don’t know how much the array performance is comprised if you do that. The simple rule for arraying is ¼ wavelength spacing of the drivers centre to centre. When you look deeper at the problem, the...

It was about 43 - 44 L allowing for the, horn and diver volumes - I did not calculate an equivalent square port area, but he box needs to be tuned to 65 - 75 Hz depending on the driver. Doing the ports the way I did braced the box walls, in addition the port exit is a bit small but doing it...

Hi Chris, I think you will love the Ciare's ... 16mm is easily available in Australian (not birch) and I suspect Europe - try 5/8" in the US = 15.9mm