woofer selected : Lorantz 15″ C390X B1

Well I had made a shortlist of all sorts of great drivers to work through the cabinet simulations with, including the B&C 15TBX100 (Italy), BEYMA 15B100/R (Spain), RCF LF15N401 (Italy), Selenium 15WS800 (Brazil), and even some from Lorantz (Dandenong, Australia), though the Lorantz ones were out of my budget, despite being locally made.

But I got very lucky with ebay and scored a pair of Lorantz 15″ C390X B1 for a great price. I’m told these are asbolutely amazing quality speakers.

Conveniently the auction even included some PA cabinets – though not great for loungeroom use long term at least I can get some instant gratification and get started with measurements and integrating the speakers before I start the big task of building some nice permament enclosures. When placed upside down they even position the speaker quite close to the waveguide, which is how I want the new cabinet to have it.

Not measurements yet. I’ve just quickly hooked up the bass drivers with some temporary banana sockets connected via the bass reflex port.

Lorantz in temporary cabinet.
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using MiniDSP UMIK-1 to Calibrate a Behringer ECM-8000

note: article incomplete, I need to tidy up the graphs and clarify what the lines are.

I recently purchased a MiniDSP UMIK-1 calibrated USB measurement microphone to help with speaker tuning. I already have a Behinger ECM-8000, but the Behringer isn’t calibrated, while the MiniDSP comes with a calibration file, you just download from their site keyed on the serial number of your unit.
As you can see, the two units come in similar, but not the same packaging, and also look quite similar:

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