Self Medicating > General DIY
Magnepan MG10/QR DSP crossover
HAL:
To drive the MG10QR's bass panels, will be using Pizza Box Amp v2.1 with the new 1kW SMPS and capacitor filter. Those will be tested soon. The QR tweeter amp will be the Orchard Audio Starkrimson monoblocks with 300W GaN SMPS.
This will be 500W into the planar 4 Ohm load, so should have plenty of dynamics even with the 86dB/1w/1m sensitivity to 113dBSPL. The QR's should be good to 108dBSPL.
The fuses will remain after the crossover upgrade.
The dspNexus 2x8 DSP crossover design is done for testing.
Now to mod the speaker crossovers to allow access to the two drivers directly.
HAL:
Removed the connector panel on the MG10QR and this is the passive crossover and wiring to the drivers. They are fast-on connectors so easy to disconnect the original crossover, remove the original connectors and use 5-way binding posts and new wiring directly to the drivers to biamp the speakers. Will use the Pizza Box Amp v2.1 on the woofer panels and the Starkrimson monoblocks on the Quasi-ribbons.
The EA dspNexus 2x8 will be the DSP crossover to replace the passive crossovers and add the servo subs below the 80Hz rolloff of the woofer panels.
With the nominal crossover will be able to make measurements to see what will improve the response of the system. Using higher order Linkwitz-Reily crossovers will improve power handling for the drivers and the amps.
This is Deja-Vu as I did this to my MGIIB's back in the 1980's, since the capacitors at the time were Mylar and Polypropylene caps were then available. A bit bigger, but sounded a lot better. Now to bypass all the passive components and see what the MG10QR's are fully capable of sounding like.
P.I.:
--- Quote from: HAL on June 20, 2023, 04:24:30 AM ---
The EA dspNexus 2x8 will be the DSP crossover to replace the passive crossovers and add the servo subs below the 80Hz rolloff of the woofer panels.
With the nominal crossover will be able to make measurements to see what will improve the response of the system. Using higher order Linkwitz-Reily crossovers will improve power handling for the drivers and the amps.
--- End quote ---
By using the higher order filters, you can pull that mid/tweet fuse and replace it with a short piece of 1/4" copper tubing. This greatly helps the dynamics of small Maggies.
HAL:
Dave,
That is a good idea.
I know my old MGIIB's sound better every few years replacing the fuses and cleaning contacts.
Rich
P.I.:
--- Quote from: HAL on June 20, 2023, 02:06:13 PM ---Dave,
That is a good idea.
I know my old MGIIB's sound better every few years replacing the fuses and cleaning contacts.
Rich
--- End quote ---
Polish up that copper tube first.
Yeah. I'm still me :rofl:
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version