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Just picked up a pair of used Magnepan LRS+ speakers with the upgraded Magnepan stands.  These will let me use the LRS+ vertically with the open baffle 1x12 subs as stands to raise them to ear height as I did with the LRS.

Will take modification pictures to convert them from passive crossover to direct drive for biamping.

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The LRS+ are in the lab and ready for modification for planar direct biamp drive.

First will be using Superior Electric 30A 5-way binding posts to replace the original connectors and bypass the internal passive crossovers.

Then will be time to use the dspNexus 2/8 for the calibrated mic to make new measurements and do speaker correction and bass management using the 1x12 open baffle sub modules as speaker stands as for CAF2024.

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Time to work with the Magnepan LRS+ while waiting for the second LRS speaker to arrive.

A pair of moded FOSI ZA3 amps set for Monoblock mode with XLR Input.

The dspNexus 2/8 is just running as an 8 channel DAC until measurements are done.

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The LRS+ with the Magnepan upgraded stands are on top of the 1x12 modular open baffle subs.  A pair of Orchard Audio Starkrimson Monoblocks is driving the LRS+ speakers passive crossovers.

This height will help with on axis measurements to get ready for the speaker correction data.

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The LRS+ driven by the Orchard Audio Starkrimson Monoblock amps and the moded FOSI ZA3 amps in monoblock mode driving the 1x12 modular open baffle subs.

The 1x12 modular subs are GR-Research SW-12-16FR's driven as normal subs with EQ for flat response.

The DSP crossover, speaker correction and bass management are done in the dspNexus 2/8 with the AK4493S DAC's.

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The LRS+ measurements are done at the listening position and the first set of speaker correction and bass management is running on the dspNexus 2/8.

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The LRS+ have now been modified for direct connection to the planar drivers for biamping or triamping with subs.  This is a totally reversible modification.

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Part 2

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The LRS+ mod kit is complete for both speakers.

Time to wire the amps and then start the measurement process.

[mix4fix]

Is removing the fuse a good idea or bad idea?

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Not a good idea since it protects the tweeter ribbon foil from overcurrent and failure.

The new 2.5A Fast Blow fuse holder is under the connector plate.

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The pair of LRS+ with the passive crossover bypassed is placed on the 1x12 open baffle subs.  Triamping the system with Orchard Audio Starkrimson Monoblocks on the woofer and tweeter planars and FOSI ZA3's as monoblocks on the 1x12 open baffle subs.

The standard Danville Signal dspNexus 2/8 is the control center and DSP crossover for speakers.

Running speaker and room response correction in the DSP.

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After testing have a new wiring technique to make the install simpler and more generic for different users amps.

With the new wiring, measurements for both LRS+ speakers are done with both the speaker correction and the sub integrated. 

Next will be final room bass management measurements at the listening position to finish the DSP processing.

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The LRS+ DSP crossover with the OB subs integrated are complete for triamping for the standard dspNexus 2/8 system.

With the OB subs integrated, the bottom end mates well with the planars with their dipole radiation pattern.

My nephew that has the LRS speakers from CAF2024 just added OB subs to his system and is loving the change as it is now like the full system from the show.  That system has just speaker correction for the LRS and integrating the OB subs.

Either way is now possible with the standard dspNexus 2/8 system as the complete front end and DSP processing.  Just add Analog or Digital sources with amps and speakers.

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The LRS+ are setup in better locations after completing the LRS speaker mod for direct biamping.  Have added the room bass management with REW measurements at my listening chair and the filters running in the Audio Weaver block diagram running the dspNexus 2/8 with AL4499EX DAC's.

The soundstage is wide and deep with bass response into the 20Hz range.  Works well for even large orchestral works.

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Got this response from an LRS+ owner with the dspNexus 2/8:

I am now running the DSPNexus 2/8 with my LRS+ and I’m really impressed so far. Still need to fine tune it with some measurements in my room, but so far, it’s really close to the GR Research crossover.