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Magnepan 1.7 dspNexus 2x8 DSP Crossover project
HAL:
The Magnepan 1.7 with the dspNexus 2x8 DSP crossover is now running. This is the one speaker with all three planars working for measurements.
From the passive crossover design and first measurements, the DSP crossover is working. Now to make individual driver measurements to fine tune the crossover. This is nothing like the original passive crossover in design.
The three Orchard Audio Starkrimson Monoblocks with the 300W GaN SMPS are triamping the planars with the 2x12 in servo sub on the left. Had to replace the original SMPS as they were in the room when the water problem occurred and soaked in water and failed when tested and the amps survived.
The super tweeter is padded with a resistor since its resistance is 1.4 Ohms. This makes it an easier load to drive for any amp.
The EA dspNexus 2x8 with AKM AK4499EX DAC's is here and will be testing it soon with the speakers. To begin, this is using my original prototype unit with AK4493 DAC's.
Nick B:
--- Quote from: HAL on March 21, 2024, 05:41:32 AM ---The Magnepan 1.7 with the dspNexus 2x8 DSP crossover is now running. This is the one speaker with all three planars working for measurements.
From the passive crossover design and first measurements, the DSP crossover is working. Now to make individual driver measurements to fine tune the crossover. This is nothing like the original passive crossover in design.
The three Orchard Audio Starkrimson Monoblocks with the 300W GaN SMPS are triamping the planars with the 2x12 in servo sub on the left. Had to replace the original SMPS as they were in the room when the water problem occurred and soaked in water and failed when tested and the amps survived.
The super tweeter is padded with a resistor since its resistance is 1.4 Ohms. This makes it an easier load to drive for any amp.
The EA dspNexus 2x8 with AKM AK4499EX DAC's is here and will be testing it soon with the speakers. To begin, this is using my original prototype unit with AK4493 DAC's.
--- End quote ---
Rich,
Looking good so far 👍 Is the EA dspNexus 2x8 with AKM AK4499EX DAC a finished product? I believe it was in the works or being considered or am I not remembering that correctly?
Nick
HAL:
Nick,
The AKM AK4499EX DAC boards are finished. I am testing them now. These are a purchased upgrade to the system.
They will be released at the same time as the ADSP21569 dspBlok when the firmware is ready. The plan is to release them both by AXPONA 2024 in April.
All the EA dspNexus 2x8 owners will get the ADSP21569 dspBlok as part of their original purchase price. They will be stock in the full production system.
All these are plug-in replacement boards into the motherboard for the upgrades. Everything is upgradeable.
Pricing is:
Production dspNexus 2x8 with AKM AK4493 DAC's is $3000.00 + shipping/handling (same price as the EA dspNexus 2x8 system)
Production dspNexus 2x8 with AKM AK4499EX DAC's is $4000.00 + shipping/handling
AKM AK4499EX DAC boards upgrade is $1500.00 + shipping/handling for either the EA system or production system originally with AKM AK4493 DAC's.
Rich
Nick B:
--- Quote from: HAL on March 21, 2024, 02:53:28 PM ---Nick,
The AKM AK4499EX DAC boards are finished. I am testing them now. These are a purchased upgrade to the system.
They will be released at the same time as the ADSP21569 dspBlok when the firmware is ready. The plan is to release them both by AXPONA 2024 in April.
All the EA dspNexus 2x8 owners will get the ADSP21569 dspBlok as part of their original purchase price. They will be stock in the full production system.
All these are plug-in replacement boards into the motherboard for the upgrades. Everything is upgradeable.
Pricing is:
Production dspNexus 2x8 with AKM AK4493 DAC's is $3000.00 + shipping/handling (same price as the EA dspNexus 2x8 system)
Production dspNexus 2x8 with AKM AK4499EX DAC's is $4000.00 + shipping/handling
AKM AK4499EX DAC boards upgrade is $1500.00 + shipping/handling for either the EA system or production system originally with AKM AK4493 DAC's.
Rich
--- End quote ---
Thanks, Rich. Glad things are moving along with the Maggie’s and dac boards.
Nick
HAL:
The Magnepan 1.7's are playing music.
The super tweeter ribbons are disconnected since the one in the left panel is open circuit. Running the tweeter panel 400Hz and up. Sounds pretty good to me even without it for testing.
The speaker is EQ'd for flat response. That can be varied to taste.
The planar woofer to tweeter time offset is corrected as is the servo subs to the planars time offset.
The dspNexus with the AKM AK4493 DAC's are running now. Just updated the firmware in the EA dspNexus 2x8 with the AKM AK4499EX DAC's and will be swapped in tomorrow for listening trials.
This is the fun part! 🙂
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