Sorry I was not communicating in a way which you would not have misinterpreted, a failing on my part, I will strive to be better.
This would depend on natural frequencies for each vibration isolation method and whether they are close to one another. This might cause a “beat” frequency that’s related to the difference of the resonant frequencies for each isolation component. My goal is to add mass (butcher block) which will have a relatively low natural frequency and then place lower mass objects with specific vibration isolation footers. So far it sounds great.
BTW, I’m an engineer with 37 years experience so not a total stab in the dark approach here.
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Interesting! My source is solid, but I don’t understand much of what you said. You’re the expert with 37 years of experience and knowledge.
Full disclosure: I’m an Electrical Engineer but my Dad was an ME and I’ve worked with many bright Physicists and MEs too. Some of this knowledge has rubbed off.
EDIT: And a subjective test has been performed (hand placed on the TT plinth while loud music is playing) after the latest additions and the overall vibration level has been noticeably reduced. So far so good.
EDIT 2: I’ve spun loads of vinyl last night with excellent results. No more low bass feedback from the “dreaded” Alison Krauss “So Long So Wrong” LP. Barry Bales can’t mess with my TT rig anymore!
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Well done!
Gamut m 200/D3 - PS audio DAC
A friend’s music system - Henrik
He writes
German Physic’s Carbon IV. They have a patent on their DDD round beam device. It runs from 190 hz-24khz. There is a 12 ”bass in a closed case with a Helmholtz resonances at the top of the case up against the DDD unit. Must turn to that everything is not cut out with laser as a small 2 way. But if you are into musical experience and less into hi-fi, well then they can sku something.
Specs & Pricing
Operating principle: Two-way loudspeaker with 360° surround radiation using the German Physiks DDD driver
Drivers: 1x carbon-fiber DDD driver; 1x 12″ woofer
Frequency response: 28Hz–24kHz
Impedance: 4 ohms
Sensitivity: 86.1dB/1W/1m
Power handling: Nominal 300W, short-term 600W
Amplification required: Minimum 160Wpc, 4 ohms
Crossover frequency: 190Hz
Crossover slopes: DDD section:12dB/octave electronic, and 18dB/octave acoustic; woofer section: 12dB/octave electronic, and 18dB/octave acoustic
High-frequency adjustment: -2dB; flat; +2dB; and +4dB starting at 8kHz
Recommended room size: 15–90 square meters (160–950 square feet)
Dimensions: 15.9″ x 48.4″ x 15.9″
Weight: 119 lbs.
Price: Satin color or veneer, $34,000/pr.; high-gloss color or veneer, $39,000/pr.; carbon, $45,000/pr.
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Gamut is the highlight for me 
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Wow, a dedicated Rega wall mount shelf, which I’d like to think would have been the end of the isolation journey. The addition of the IsoAcoustics feet and the iso acoustic shelve and a butcher block cutting board, was a bit of a revelation! I had intended to mount my P8 on a new Rega wall mount, but the idea was shot down instantly. Probably for the better seeing it would have been an initial step on the path to meaningful isolation.
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Not easy to meaningfully isolate lightweight record players, as the way to reach the desired round about or even below 4 Hz area, it needs heavy weight and soft suspension. As this is not possible with feet under such light weight. My assumption is, that what’s achievable is not that critical for detailled optimizing.
I think it then aims for best bass response and as little as possible coloration above, rather than the possibility to achieve the last bit in ambiance retrieval with it.
My experience is it is a matter of mechanical tuning to a specific frequency range. Mass plays into it, and then a sprung isolation system tuned to filter out a specific low frequency band. Wall mounting could help with floor resonance, especially with a suspended floor over an open space.
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Yes, it’s just the last bit that’s just achievable with high masses, the rest is a matter of matching the concept. Which is why I think refitting a thought out concept (which is rare but the Rega probably is) without explicit knowledge rarely is „better“, rather than „different“.
Check out the Minus K platforms linked in above post. Natural frequencies in the 0.5Hz to 1.5Hz range vertical and horizontal but ouch the prices are scary.
Yes I know…I once tried an even better one:
They indeed are a solution also for lightweight players…but with 15k they are more expensive than probably any Rega-like player…and the airborne sound alone stimulates a lightweight chassis more than the platform eliminates. But that’s why Rega at least skeletonizes their better chassis.
I think if one’s on the level to buy such a platform, he doesn’t put a Rega on it.
Nothing against Rega (except that they are not properly adjustable when using better/sharper stylus design than their own).
And for another, rather major update/upgrade… Some nice, new Magnepan 1.7i’s!
Since these two pics earlier this evening, the Maggies have swapped sides so now that tweeters are on the inside. Lots more tweaking to come over the weekend.
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Looks great!
Does it really sound right, toeing them in so strongly? Magnepans are one of the few where I remembered they definitely need a more conventional toeing.
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Are those cat beds or dog beds?
Are the pets music critics? My bunny is. I put a brand new Oscar Peterson CD in and when she heard then first blast of the Roy Hargrove’s trumpet she said aw hell no.
I had to take it off and switch to the Eastern Music she prefers.
She is an Eastern Bunny after all.
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Thank you.
It doesn’t sound bad toed in like that, though it’s not as drastic as it looks in the pics either. Then again, I’ve only had them up and running since yesterday afternoon, and two of my brothers cam over shortly after, so I didn’t get to mess with them too much. I’ve already swapped them once, moving the tweeters from the outside to the inside just to see how it changed the overall sound. I’ll switch them back again today at some point and play around with placement more.
There’s still lots of experimenting and tweaking to be had, a lot of which I’ll be doing today… And the next day… And some more after that… And… LOL
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The question is: what happened to REGA’s design concept: “the less mass/weight the better”. The turntables and wall brackets are designed to that concept, so it is very interesting to read that adding all that mass improved the sound quality.
From a science perspective we need to distinguish between 2 kinds of vibrations:
- external, for example:
A house built from 2 by 4” wood beams + sheath rock versus a brick and mortar wall. Any external force, like pressure waves from wind, people walking on the wooden second floor or stairs, cause friction on the 2 x 4 beam construction and consequently causes vibrations in the wall. The vibrations are easily transferred by a light weight but stiff wall bracket to the very stiff turntable, tonearm and finally the cartridge. - internal vibrations:
Any vibrations (rumble) caused by the turntable has no meaningful effect if there is no mass.
Since there is no such turntable that has no mass REGA minimizes both mass and vibrations resulting in a turntable that can produce clean sound.
The REGA concept addresses the internal vibrations effectively, but apparently not so much external vibrations.
So I can imagine that the Inacoustic vibration damping add ons effectively improve the performance of the REGA in case the wall bracket is mounted to a 2 x 4 + sheath rock wall.
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Those are cat beds, and yes, they are music listeners/critics, a few more than others. We have five in total… All with sharp little claws!
That last one being the reason why I’ve hesitated for the past 12+ years buying Maggies again. Back when I had my MGLR-1’s (now over 20 years ago), our cats back then were declawed, so all they could do was rub their little paws on the grill cloth.
This time around, after all this time, our current crew of mews show no interest in the speakers I’ve had here over the past 12 years, so figured it was about time to get into some Maggies again. When I first brought them in yesterday, a few of the kitties came in and sniffed them a bit, then walked away. Ever since, none of them have gone near them. Luckily, it seems that they couldn’t care less, as long as they have music to listen to.
With that all said, just as a precaution, I went to Lowes and bought a small roll of that 24" nylon garden netting, cut it to two lengths of about 6’, and have them wrapped around the bottom of the Maggies. Again, only two of the cats went over and sniffed the netting, then walked away.
They’re all somewhat older cats, with the youngest being 3, and the oldest being 12, so I think that might have something to do with it as well.
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Yes, in my past experience I just found, that Maggies, in their soundstaging behavior react quite sensible to exact toe in. They get very narrow and centered when toe’d in too much and quite flat in depth when toe’d in too little.
As they have other strengths than maximum focus and localization, one is often tempted to toe them in too much.