- Why is Tony L's Denon TU850 good, because it's built like a battleship, is in rare but fine condition or because it shows up a lot of other tuners?
It is a pleasure to own and use due to all of the above, but what makes it a good tuner is it's spec. Tuners are simply tools for receiving radio signals, therefore a sensitive, selective tuner with a good S/N ratio is likely to be a good one. A no-compromise 5 gang, 5 filter monster like the Denon will grab and quietly hold onto signals that elude cheaper tuners. Coupled with a decent roof aerial it sounds stunningly good on live R3 broadcasts, as can pretty much any decent tuner, the TU-850 just does it a bit quieter and cleaner than most.
- Is a Troughline really that good or vastly over-rated if you live more than a few hundred yards away from the transmitter?
The Leak, like Quads, Naims and other UK tuners are less sensitive and selective than the Japanese super-tuners of the 70s. Some like the Troughline and more expensive Naims are truly superb sounding tuners, but the decision as to whether they are for you depends to a large degree where you live in relationship to a transmitter.
How does the sound of these compare with Magnum Dynalab, classic Sansui, Marantz and a typical spread of price points and tehcnologies as can be seen i the latest HiFi-World.
To me the only real choice is between a Troughline and a 70s Japanese super-tuner. The Naims and better Magnum Dynalab models are stupidly expensive and look poor value by comparison.
With the Japanese tuners just buy at the top of the range, all the major brands made at least a 5 gang, 5 filter tuner and this is what you want. How much they sell for these days depends largely on the aesthetics with Marantz, Pioneer and Sansui commanding the top prices as they look so damn cool. If you want a real bargain Sony are worth keeping an eye on, they made some stunningly good tuners, but they tend to change hands for peanuts as they are less aesthetically pleasing than the above, look out for a ST-5000F or ST-5090SD.
Tony.