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I've been experimenting a little bit the last few days with the 2216nd crossed to 18sound 4015BE and I have to say that crossing the 2216 over at above 800 isn't really recommended. There's a clear...

Excellent waveguide, 1-2 dB too hot tweeter and cabinet could and perhaps should be a little bit better resonance-wise. It's possible that some of those resonances could come from something being...

Nice build!

I have replicas with the Crown 4x1200 cdi with JBL provided M2 presets included and have compared the manual settings with the built-in presets.
Interestingly enough the built-in...

Hi guys, I'm sorry for the delayed response!

Thank you guys for answering, it's certainly not easy when in-room to create measurements sufficiently good enough below 1000 hz to give meaningful...

The measurement is taken in-room at 1 meter distance from the tweeter and gated around 3,6 ms if I recall. 400 hz steep crossover.

Initial impression is that the driver sounds way smoother than...

Hi there, good people!

In the search for 2451 with aquaplas or Truextent beryllium I was offered a set of brand new 18sound Nd4015 beryllium drivers at a good price that I couldn't refuse....

Just want to update my struggles with getting the Crown Cdi 4/1200 BL to work properly with the inbuilt M2 preset.
Loading the files from Audio Architect doesn't work due to some error in the FIR...

There's a few reasons I can think of why this isn't common;

- Flat to 20 hz anechoic means extremely bass-heavy speakers in-room. Each boundary in proximity might give up to 3 dB per octave room...

I swapped the two 24v 80mm fans (two wires) in my cdi 4/1200 bl with low-speed ones with great success.

I recommend fans that spin at around 2200 rpm (about 27 dB) instead of the 1500 rpm (17 dB)...

Thank you for answering!

Do you by any chance have some frequency response measurements from any of the speakers measured relatively near-field? I'm just interested to see if there's any...

Interesting! Any difference noticed with the cabinet in MDF vs ply?

Thank you for ending my monologue! :D

I do actually have Minidsp DDRC-22D Dirac (all digital box), but before you use room correction you need to have the rest of the chain in order. Otherwise...

Just in case people are interested, here's a sweep of both drivers + combined measured from 1 meter to illustrate what happens with the Crown built-in M2 settings;

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Hope for success severely smashed to bits :banghead:
While I found some wire-malfunction in the DLCP, the JBL M2 settings included in the Crown CDi Drivecore results in a 20-30 dB too hot bass and a...

Another look and careful reading of the manual has given me new hope. I can now see, thanks to the brilliant input lights on the Crown, that there's something wrong with the Hypex DLCP.

Channel 3...

Okay, first impressions of the Crown CDi 4/1200 DriveCore BL is the following;

1. Way too much hiss for my comfort. 4 meters away with gain settings at the lowest (26 dB) and one speaker connected...

Well, I have a Crown 4/1200 CDi Drivecore incoming, so I guess I'll answer my own questions :D
The most interesting part will be the fan noise and white noise along with the differences with...

Sorry, I forgot to comment on the mic and calibration file. Yes, I'm using Umik-1 with calibration-file. What I don't understand/have equipment for is how to measure pre-amp output. I'm contemplating...

Yeah, about that. Too difficult for me to understand how to do that. I tried searching the Googlenet, but too much noise on this interweb stuff!

I'm contemplating buying some Crown CDi amps to get...

And here I tested close-field (inside throat) at 110 dB to calibrate driver spl and check for distortion differences.

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Here is the slope difference between 1,35 and 1,135;

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Ok, testing now. Measurements @1 meter on-axis confirmed with laser.
First is the close-field measurement of Rephase settings vs 1 meter converted settings according to POS' brilliant crossover...

Good point! I'll measure straight in front of the tweeter @ 1 meter and see how that looks. :D

Thanks guys!

Update;
Hm, something strange is in the works here. I tilted the right speaker and placed it back down and now the right tweeter is only 2 dB hotter than the left tweeter. I can't be...

Yeah, multiple measurements are needed to confirm when your aiming for accuracy. I'm not sure Umik-1 is the right tool either, but I find the original M2 settings to be too bright. They elevate all...