Of the two a new cartridge. At least, that is my experience. With that said, if you change speeds often the PSU is super nice to have.I'm considering upgrades. Eventually I want to acquire an Exact 2 cartridge and Neo PSU. Wondering which of these two would provide a more dramatic improvement.

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I've got a P3 with TangoSpinner's Astor Subplatter/Ceramic ZrO2 Ball Bearing and their cool Bocca adjustable feet. Cartridge is the new Audio Technica AT-VM95EN. I use the TT without a mat and a Clearaudio Clever Clamp. Sound is lovely with no static whatsoever. My P3 came with Rega's polycarbonate subplatter but I noticed one major defect; the platter hole is a bit larger than the subplatter's spindle so you can move the platter side to side about 0.5 mm. Surely this affects wow and flutter since it's unlikely that the platter would be centered on the Rega subplatter. The Astor has a rubber o-ring on the subplatter and on the spindle so the glass platter is perfectly centred on the subplatter with no movement whatsoever. The o-ring on the subplatter probably also helps to dampen the glass platter. I tried the setup with and without the Rega mat and find that the sound is much better without the mat -- not as bright and with tighter bass. This is probably due to the optimum VTA since the arm is perfectly level with the AT cartridge when you don't use the mat (the AT cartridge has a height of 7.2 mm from stylus to the top of the body).
Hello, I have a rega p25 and I wanna put aI've run and enjoyed several Planars over the years, including a couple of Planar 3s and a P9 for several years.
These days I run the Planar 25 as the main table. I like the Rega TT philosophy of low mass, high rigidity, low energy storage and fast decay of resonance. Everything in a Rega table is geared to achieving these goals.
I don't however use a Rega arm and my (stock - I like the Rega tables stock) Planar 25 carries a Mission 774. This arm was designed with many of the same priorities in mind and the pairing works extremely well, to the point that the sonics matche a P9 IMO.
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On Friday I'll be joining the team Rega for the second time. Many years ago I purchased a used Rega RP1 off audiogon. That table was a trip down the rabbit hole. It had a bad case of platter wobble and hummed a bit too. I completely modded it out with a tangospinner, dual belt pulley, 24V motor upgrade, glass platter, 2m Blue, and plinth bracing. I also made a ground strap that rand from the bearing hub to the phono preamp. It sounded GREAT after thatA few years later I picked up a Clearaudio Concept. The Rega was my secondary table until my ex wife decided she wanted it in the divorce.
On Friday I have another Audiogon purchase arriving. This time a newish Planar 3 with a 2m Bronze cartridge. I had the shop install a Rega 2mm spacer for the arm. This time I'm hoping to leave it alone.
. . . Looked at the new Planar 8?
Went in to my dealer to demo it, sounded really great but the Bugger had a bit of a trick up his sleeve.
He demo's the 8 against the new 10...he knew what he was doing. . .
The P10 had a used Dynavector XX2 Mk2 (same cart I used at home on my Gorbe) and the the P8 had a newer Dynavector DV20 X2.
I found the XX2 on my own deck at home to be slightly warm and cosy, so surprised the 10 brought out its detail retrieval in the way it did.
Zero background noise and instruments projected in 3d better than I’ve heard from any other deck, including some very expensive boutique ones I’ve heard at hifi shows.
Biggest difference between the decks was the sense of real life timing and sense of real musicians in the room the 10 had.
The detail retrieval on the 10 was noticeably better, in fact It was so better it was hard to think there was anything being left out.
Room ambience, subtle cues, wrist taps on cymbals...all really shone as much better on the 10.
I Went in and didn't want to spend P10 money, wanted the difference to be the :diminishing returns” type, but unfortunately not.
Cant imagine anyone not loving the new P8, but the 10 plays in a different Sport.
The P10 had a used Dynavector XX2 Mk2 (same cart I used at home on my Gorbe) and the the P8 had a newer Dynavector DV20 X2.
I found the XX2 on my own deck at home to be slightly warm and cosy, so surprised the 10 brought out its detail retrieval in the way it did.
Zero background noise and instruments projected in 3d better than I’ve heard from any other deck, including some very expensive boutique ones I’ve heard at hifi shows.
Biggest difference between the decks was the sense of real life timing and sense of real musicians in the room the 10 had.
The detail retrieval on the 10 was noticeably better, in fact It was so better it was hard to think there was anything being left out.
Room ambience, subtle cues, wrist taps on cymbals...all really shone as much better on the 10.
I Went in and didn't want to spend P10 money, wanted the difference to be the :diminishing returns” type, but unfortunately not.
Cant imagine anyone not loving the new P8, but the 10 plays in a different Sport.
Nice! So, are you using the Dynavextor XX2 or the Rega cartridge in the second set of pictures?
After weeks of fiddling with my Planar 3, changing belts, ordering new [defective] belts, putting elastic bands around the subplatter rim, trying a dozen elastic bands on the 45rpm groove of the pulley to aid the stock 33 belt, cleaning, living, recleaning, reoiling with better spec oil...all to no avail, wow and flutter (0.29-0.62%!!!) and pitch (33.43 RPM average), which are both very audible to my overly "thenthitive" ears...TODAY IT FINALLY RUNS WITHOUT AUDIBLE WOW AND FLUTTER (well, almost. Virtually none...).
What is it with Regas? Just when I am ready to cannibalize the table for the nice arm, it starts sounding excellent.
Now I am really tempted to slap a good MC cartridge on it.
Anyone else experience this