What I did to my Magnepan MG12's and I'm doing with my new 1.7's


I UPGRADED the crossover components in my MG12's!
OMG!
Do you guys have any idea what happens when you replace a $9 cap with a $250 one??
And replace a $1.75 cap with a $18 one, and replace a $12 inductor with a $65 one??
Well... that huge GULF of quality difference between a MG12 and a 3.7 gets a WHOLE LOT SMALLER. They become MUCH more serious sounding HI-END speakers.
I've been living with these modified MG12's upgraded for a year and half and enjoy them immensely. And I've owned $10K speakers before the great recession so I know what great sound is.
Since the 1.7's have much better panels than the MG12, I've decided to buy a pair and DO THE SAME WITH THEM.
The important thing is I'm not changing ANYTHING about the design of the crossovers, ONLY the QUALITY of the components. Probably will sink about $1K-1.5K in them. You would be surprised to hear people I tell about what I've done say back to me, "Oh, that just can't be worth doing or make much improvement". Are you kidding?? What do you think happens when replace a $35 pair of headphones with a $650 pair? You seriously think you won't get a better sounding pair? OF COURSE YOU DO! And it's the SAME THING with the parts that make up a crossover network. I'm just grateful to Magnepan for them putting all the value into the panel drivers instead of the crossovers. Think of how difficult it would be to try to upgrade/mod those big panels?
(MG12) I put Clarity cap MR 400v - 27mF+5.75mF (33mF replacement) for the tweeters, a 2.8 mH - 16 ga. foil aircore inductor with 50mF solen fast cap for the mid/bass (but suggest using a 12 ga. instead), and leave all the factory components in place and just run new wires from panel tabs out the speakers terminal holes. Keep all speakers term. parts in case you sell them. Break-in is about 50-70 hours, then they go magically serious sounding. Before break-in happened I have to admit I was wondering if this was a completely stupid act, but no, it was absolutely righteous in EVERY WAY.
Even the 3.7's are using very base grade parts I've noticed. There is a guy on these forums that claims his 1.7's  with upgraded parts sound better than his friends 3.7's, I whole-heartedly BELIEVE him. All I can say is if your 3.7 or lower model Maggies are running stock XO componenets then you have NO idea what they are capable of, that's my story and I'm sticking with it. If anyone wants advice or help I'm happy to assist. Enjoy this wonderful experience. God bless.
dfarmer
Paul at PS Audio just responded to my inquiry. (BTW, Paul is a super great guy) I was right that he was using a ML sub, but it was the Descent model.
Everyone,
It is June 11th and I am 200 hours into my Magnepan 1.7 Clarity Cap MR speaker auditioning.
It took a very long 125-150 hours before the Caps finally settled in and I am in a very new world with every blessed file and vinyl disc being a new experience to re-discover. It's like they really have no limitations and there is absolutely no need for a subwoofer in the room I currently have them in. I thought about making a defined playlist of the songs that really exploit the capabilities, except EVERY SONG WORKS for demonstrating these mamas! THERE IS NOTHING THAT SOUNDS BAD!
I will do some sort of detailed write-up maybe a new post or on the MUG Tweaks web site. There needs to be more information made available about how well the Clarity Cap MR's transform Mags.
I need to get back to listening to Everything I have both vinyl and bits.
Just ran across this thread (on October 30th, 2020) while my MG12QR's are playing in my living room now.  I upgraded to Clarity ESA caps and Jantzen coils, both with higher voltage tolerances (to give a measure of safety for the 'doesn't get any louder when turning the volume to 11') 

Completely new speakers after break-in.  The MG12 QR's are very placement sensitive but when dialed in, the music literally floats in my living room and the Maggie's hold their own w/o distortion.  I use the same test cuts thru Arcam low voltage gear, a Rega P-3 with upgrades and monoblock amps. I built dovetailed boxes for the new components - they sit nicely behind each speaker.
I'm a retired broadcast engineer and audio nerd without raising my nose to others - if you're happy, I'm happy.

What caught my attention was the note asking if someone does these mods. I have time, winters are long here in northern Minnesota.  To solve a turntable feedback problem I've started a one man shop - www.auditoryascent.com and contact me thru there.   If it's not ok to post the address I apologise, and feel free to edit it out - is more a labor of love than money maker.

Yes, get a sub woofer and raising the Maggie's 2 inches off the floor helps low frequent dispersion.

Lindsey Buckingham sounding pretty good now....