BMR-CC

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Rick Craig

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BMR-CC
« on: 18 May 2019, 05:40 pm »
Here's the test box...




Rick Craig

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Re: BMR-CC
« Reply #1 on: 19 May 2019, 02:02 am »
On-axis curves for the drivers without the crossover. Room effects show up below 200hz. The ribbon doesn't have that kind of bass extension - that's actually where the room's noise floor starts to dominate as the ribbon's response is completely gone at that point.

« Last Edit: 19 May 2019, 11:59 pm by Rick Craig »

Rick Craig

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Re: BMR-CC
« Reply #2 on: 19 May 2019, 02:28 am »
0-15-30 degrees horizontally for the midrange.




Rick Craig

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Re: BMR-CC
« Reply #3 on: 19 May 2019, 12:51 pm »
Nearfield bass response. The sealed box tuning is working well.




BluesDaddy

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Re: BMR-CC
« Reply #4 on: 20 May 2019, 10:09 pm »
These look good, Rick! I'm excited!!  :D :D

Rick Craig

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Re: BMR-CC
« Reply #5 on: 23 May 2019, 02:12 am »
0-15-30 horizontal off-axis response curves. Taken on the tweeter axis at 1M distance, 1/12 octave smoothing, 5msec blended sine signal.




Rick Craig

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Re: BMR-CC
« Reply #6 on: 23 May 2019, 02:16 am »
Vertical response curves V1 (midrange axis), V2 (midpoint of tweeter and midrange), V3 (tweeter axis), and V4 (slightly above the top edge of the cabinet).




« Last Edit: 25 May 2019, 02:40 am by Rick Craig »

Rick Craig

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Re: BMR-CC
« Reply #7 on: 23 May 2019, 07:19 pm »
Easy to drive impedance, 6 ohms nominal and 4.6 ohms minimum.




Rick Craig

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Re: BMR-CC
« Reply #8 on: 25 May 2019, 02:41 am »
And last of all, 86dB /2.83v / 1M sensitivity.

BluesDaddy

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Re: BMR-CC
« Reply #9 on: 25 May 2019, 03:41 pm »
I'm really excited to be getting this kit and appreciate Rick for working with me to get it designed and completed. I reached out to Rick when it seemed that Philharmonic BMRs might never be produced again and, to be honest, I didn't really just want another BMR to lay on its side with the tweeter rotated. So I asked Rick if he could modify the Ceramica center design and as we talked through it it turned out he could get the BMR driver AND the same RAAL tweeter that the Philharmonic BMR uses. We could have also gone with the Scanspeak woofers, but he convinced me the SB Acoustics woofers would work as well (if not better) and the $150 price difference didn't hurt, either. Rather than ported, we're going with a sealed design for the center as I run dual Rythmik subs in my system.  The cabinet is pretty simple, but I went ahead and got the baffle cut and routed for the drivers from Rick as the BMR driver is a little tricky and the price was quite reasonable. My only concern is my finishing skills as I will ATTEMPT to emulate a piano black finish. Fortunately, as the center speaker, it will be almost impossible to really see the sides and top of the cabinet once placed in position, so I'm not OVERLY worried. I'll be doing a thread on the build (which will be quite simple compared to some here, especially recently) but I've not even started on the cabinet yet, so it will be awhile.  As everyone has said, Rick has been great to work with, especially given that he's done a couple of Audio Shows (you were at Axpona as well, right Rick?) during this whole period. Happy to be joining the Selah family!!

Wallacefl

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Re: BMR-CC
« Reply #10 on: 3 Jun 2019, 02:08 pm »
Just would like an opinion on the BMR driver as I am considering trying it as a midrange in an old Large Advent loudspeaker (400-4000hz). Thank you for your opinions...

Rick Craig

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Re: BMR-CC
« Reply #11 on: 4 Jun 2019, 02:20 pm »
Just would like an opinion on the BMR driver as I am considering trying it as a midrange in an old Large Advent loudspeaker (400-4000hz). Thank you for your opinions...

I probably wouldn't cross it that low as the surface area is small and the amount of linear excursion is limited.

Rick Craig

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Re: BMR-CC
« Reply #12 on: 4 Jun 2019, 02:24 pm »
The test box is available for an unfinished kit. Please PM here or email / call for a quote with shipping included.

BluesDaddy

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Re: BMR-CC
« Reply #13 on: 22 Jun 2019, 04:27 pm »
Well, my daughter is finally able to get to putting the box together this weekend. We talked yesterday regarding her approach and whether she needed any additional tools, etc. (fortunately, no, she's got what she needs already). She'd forgotten I told her I got the baffle from Rick, so she was freakin' a little bit over the doing the baffle but was like "oh, no problem" when she found out that was done. I hope to get started working on the finish of the cabinet next weekend and then finishing up over the 4th of July weekend. I'm going to attempt a piano black finish, so am going to take my time on that.

Rick Craig

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Re: BMR-CC
« Reply #14 on: 24 Jun 2019, 07:24 pm »
Well, my daughter is finally able to get to putting the box together this weekend. We talked yesterday regarding her approach and whether she needed any additional tools, etc. (fortunately, no, she's got what she needs already). She'd forgotten I told her I got the baffle from Rick, so she was freakin' a little bit over the doing the baffle but was like "oh, no problem" when she found out that was done. I hope to get started working on the finish of the cabinet next weekend and then finishing up over the 4th of July weekend. I'm going to attempt a piano black finish, so am going to take my time on that.

Looking forward to the completion of your cabinet!

uncola

Re: BMR-CC
« Reply #15 on: 5 Jul 2019, 05:14 am »
Exciting news to me that rick can provide a routed baffle for kits.. I have wanted to order kits with baffle or flat pack from diysoundgroup for the longest time but he doesn't ship to hawaii and shipping forwarders are so complicated.  Selah is top of my list for my next speaker.. I've never had one with a midrange driver so I'm waiting for some new exciting midrange to get released before contacting him

Rick Craig

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Re: BMR-CC
« Reply #16 on: 5 Jul 2019, 10:06 pm »
Exciting news to me that rick can provide a routed baffle for kits.. I have wanted to order kits with baffle or flat pack from diysoundgroup for the longest time but he doesn't ship to hawaii and shipping forwarders are so complicated.  Selah is top of my list for my next speaker.. I've never had one with a midrange driver so I'm waiting for some new exciting midrange to get released before contacting him

Yes, we can provide baffles for most kits. What midrange are you wanting to use?

uncola

Re: BMR-CC
« Reply #17 on: 5 Jul 2019, 10:21 pm »
Not sure..  something new and exciting or special..  the BG neo8s planar seems interesting. 

BluesDaddy

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Re: BMR-CC
« Reply #18 on: 30 Aug 2019, 04:18 pm »
Looking forward to the completion of your cabinet!

Unfortunately I was entirely over optimistic, as was she, in declaring the cabinet would be put together that weekend. It actually was about another month due to a variety of reasons, most of which had to do with my daughter having pretty bad morning sickness.  That said, the cabinet has been put together and I'm working on bondoing the joints. It's slow go as the stuff sets up so quickly. I've two sides close to done (need a tad more bondo) and then two more to do; then sand all smooth and start sealing. When that's done I'll start work on the paint job.  I'll try to remember to take pics as I go. Here is one after I got the baffle glued to the box. I'll take another when the bondo is completed.



Rick Craig

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Re: BMR-CC
« Reply #19 on: 31 Aug 2019, 03:55 pm »
Unfortunately I was entirely over optimistic, as was she, in declaring the cabinet would be put together that weekend. It actually was about another month due to a variety of reasons, most of which had to do with my daughter having pretty bad morning sickness.  That said, the cabinet has been put together and I'm working on bondoing the joints. It's slow go as the stuff sets up so quickly. I've two sides close to done (need a tad more bondo) and then two more to do; then sand all smooth and start sealing. When that's done I'll start work on the paint job.  I'll try to remember to take pics as I go. Here is one after I got the baffle glued to the box. I'll take another when the bondo is completed.



Good progress!