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3-way monitor, yet to be named
I have been contemplating such a design for quite some time. I did an 8" W/TM using cheap GRS drivers years ago that ended up serving as rehearsal monitors for a local band. I enjoyed the design aesthetic, and since it used the GRS sealed back mid it punched well above its price class in the midrange. Bass was excursion limited, and the Audax knockoff tweeter sucked.
Fast forward to today, and I finally collected the drivers I figure would offer the performance I was after.
I have a pair of GRS RT1.R-8 ribbons, HiVi DM-7600 dome mids, and Dayton SIG270-4 woofers.
Design goal here is obvious so I will not go in to too much detail. Suffice to say a flat response from 27Hz to over 20kHz and a smooth off-axis.
These are intended to be used in a local studio as playback monitors provided they are willing to pay the price lol.
Preliminary modeling (using 0.5 ohm series resistance):
At first blush it might look a little too "roller coastery", but the ripples are actually +/- 0.3db so inaudible. Pretty sweet woofer as far as that goes. It will handle 70W all the way down to 24Hz! It should handle the volume twist with ease. What it really means is at normal playback volumes (80-85dB peaks) thermal and mechanical compression will have zero issues. This translates to very clean bass and lower mids.
The only thing I am wobbling on is driver arrangement. Do I do all vertical TMW or do I do a horizontal W/TM? The vertical should theoretically offer some advantages over the W/TM, but the W/TM will appeal more to musicians due to the sheer number of such designs penetrating the recording studio world.
So anyways, cabinet work for Cabrini the Last is well underway so in the meantime I have started this one.
Comments
I would build to suit where they are intended to reside. The vertical will need some distance, which might not be feasible depending on the room.
Hence my waffling - it is not a given they will end up in that studio. They currently use a DIY pair designed by another local guy, but that was over 25 years ago and he didn't use a lot of CAD tools back then. They are not a very good speaker despite using all Scanspeak drivers. The owner has heard a couple of my designs and uses one in his personal home mixing/mastering room as one of the playback monitors.
Anyways, this should make for a killer design with lots of potential for fun.
GO!
JR - I am contemplating similar monitors and have decided to make the baffle in two parts so the woofer stays put and the MT baffle can be spun and remounted 90*.
This allows the monitor to be either vertical or horizontal config with the MT offset from center-line.
Make sense?
Yep.
Horizontal. Practically a standard for studio control room mains.
Ethan Winer just bought a pair of the 8" according to his FB post.
Much like the Cambridge Soundworks M80
Those are going to be awesome! I hope to hear them before they go to their owner's studio. Those dome mids look ATCish.
I'd love to get a chance to hear those too. They definitely fit my preferences. I also like the idea of mounting the mid and tweeter onto a round faceplate/insert. Wheels are turning...
Sehlin Sound Solutions
I’m not much for studio monitors. So I would vote for the carousel style mounting of the MT. There’s been quit of few companies that have done it. It would make a very universal type kit.
https://www.jfcomponents.com/
Yup, there you go.
Need some baffle plate construction/designs, guys - chip in your ideas and maybe Brad will be amenable to turning some out as a kit for a profitable fee - I'd definitely buy.
I'd take a blank circular MT inset baffle and a matching main/woofer baffle of my dimensions for sure . . .
I likely won't do it modular just due to complexity. Cool idea though.
For anyone that wants to attempt this, it can easily be done with a circle jig. A jasper jig will make it as simple as cutting a woofer recess, and cutting a mating circle with a step, kind of like the leftover from a woofer cut out with a rabbit around the outer edge.
I get it is doable with Jasper jig.
My post wasn't aim at you JR, I say build what you want. I just wanted to point out that it's relatively simple if anyone wants to go that route.