@newton_john i didn’t mean to pit the importance of phonostage against bearing, Tonearm or cartridge. All I am saying is the standard of the TTs and cartridges were so much higher than the phonostages they made in that era. It was almost a neglected child which was there for the sake of completion. No serious effort was made to make top quality phonostages to match the remaining analog innovations.
Phono Stage - The great analog tragedy
In the world of analog playback, there is an interesting observation. There has been tremendous innovation in the field of
Turntable - Direct, Idler, Belt
Cartridge - MM, MC, MI
Tonearm - Gimbal, Unipivot, Linear Tracking
For all of the above designs we find some of the best reference components designed in the 50s, 60s, 70s and 80s. Most of the modern products are inspired from these extraordinary products of the past. But when it comes to phono stage, there is hardly any "reference component" from that era. They just standardized RIAA curve for sanity and left it. Manufacturers made large preamps and amps and allocated a puny 5% space for a small phono circuit even in their reference models, like a necessary evil. They didn’t bother about making it better.
The result? It came down to the modern designers post 2000 after vinyl resurgence to come up with serious phono stages for high end systems. Unfortunately they don’t have any past reference grade designs to copy or get inspired from. Effectively, just like DACs, reference phono stages is also an evolving concept, and we don’t have too many choices when we want a really good one which is high-res and natural sounding. Very few in the world have figured out a proper high end design so far. And most of the decent ones have been designed in the past couple of decades. The best of the breed are probably yet to come.
It is a tragedy that our legendary audio engineers from the golden era didn’t focus on the most sensitive and impactful component, "the phono stage"
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The TT > Tonearm are a Mechanical Interface, which to be the best interface achievable has to be optimised in their shared role of supplying the Stylus the very best interface when being in contact with the Modulation in the LP Groove. The Tonearm in isolation is a Tool of Support Only, it serves to supply a method to place a Cartridge at a setting for a particular Geometry and enable the Cartridge to trace the Groove uninfluenced by the Tonearm, where the Cartridge is enables to be producing an unadulterated facsimile of the Grooves Stored Data. The TT in Isolation, is a Tool to support the Hard Media that is containing the Stored Data to be extracted by the Cartridge Stylus from the Groove Modulation. The TT when functioning, has the role to ensure the mechanical parts are sufficiently supported in a rigid structure, the Spindle Bearing is a True Axis during the Spindles Rotation, the Platter rotates with no run-out, the Speed of the Hard Medias rotation is accurate. Manufacturers of either of the above devices will have been mindful of the need to have a specific function and the need to consider tightness of dimension tolerances to be maintained for the overall assembly of the devices to be used. Being mindful of dimension tolerances does not equate to a design being absolutely optimised for its own function or the function in conjunction with another device. Slop between moving parts at interfaces in a assembly can be found in devices produced by the most renowned Brand Names from the OP's references to era of production. At later periods of production when the knowledge was at the mainstream about the value of maintaining very tight tolerances, Long Term established Brands were seemingly slow in the uptake and not able to make the important choices to improve the quality of interfaces for moving parts. Newly Established Brands proved to be the ones to address issues of variances of dimensions for tolerances and create designs using different materials and designs that proved to be advanced as a offered product to the Olden Designs still on offer and being used. Established Brands were forced through loss of marketing opportunities to conform to the latest designs from the new brands that were being presented to the market. Function of Tonearm and Function of a TT took on a new meaning when CD kicked the Vinyl Medium of the Top Spot in being a marketable commodity. Manufacturers of Analogue related products prior to adopting their supplying CD Sources, did do quite a bit to produce items to be used for Vinyl Replays to be substantially improved over their earlier guises of offerings. In my own experiences and within my budget, the most advanced work being achieved that I am familiar with, is offered by individuals with adept skills for improving a Tonearm or TT's Mechanical Function and Speed Function as their own bespoke designs, especially where alternate and more fitting for their purpose materials are introduced, along with the advances in material selection enabling the Machined Tolerance Dimension for interfaces for moving parts to be substantial reduced. Add to the above the added research put into improving the material used for sending the electric signal from the Cartridge and the whole becomes something unimaginable for the improvements being created.
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@motown-l brings up an interesting point. We had some superb SUTs in the 60s and 70s. Those are the references even today. But reference MM stages? Can’t think of any |
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