Stick with a top seller one that got raves when it came out and is still manufactured as is - practically unchanged for more than 5 years and yet still gets raves. I mean one model unchanged not one that has version B, C, D E or F with different designs each season. Beware anything that changes in less than a year, as it is obvioulsy like the latest clothing - it has changed by spring! A manufacturer that makes more models than Imelda Marcus has shoes is telling you something....they are a fashion accessary first and foremost - their product is driven by aesthetics and made for those we absolutely have to have the latest fashion! Of course DSP's do change with the newer formats - so that is inevitable and not necessarily a bad sign (so a big exception here)
You'll often find the stuff which lasts is regarded highly for its good value just as much as it is for sound quality (it has broad market appeal and not just the novelty market where rare stratospherically priced items are prized). At the end of the day, if a manufacturer gets it right with a product then ask yourself why would they change? Those that keep changing are trying to revive a flagging relationship with their customers....meaning the novelty of their original product has simply worn thin.
Another trick is to look for the product that made the manufacturer an audiophile well known name - some companies get started on a great product ....it does not mean that everything they make will be as good. Perhaps they priced something too low to begin with and it is a huge success - a "giant killer" - this does not guarentee that subsequent products will be as good or as great in value.
Example of giant killers are AKG240 headphones, which came out in the late 70's. Some speakers have achieved this too (largely unchanged in 30+ years) Some power amps also, On the source front there has been too much development recently to look as far back as 30 years but I would say there are some DAC's with 5 years under their belt that are largely unchanged and that is an encouraging sign, especially if they are still popular...
You'll often find the stuff which lasts is regarded highly for its good value just as much as it is for sound quality (it has broad market appeal and not just the novelty market where rare stratospherically priced items are prized). At the end of the day, if a manufacturer gets it right with a product then ask yourself why would they change? Those that keep changing are trying to revive a flagging relationship with their customers....meaning the novelty of their original product has simply worn thin.
Another trick is to look for the product that made the manufacturer an audiophile well known name - some companies get started on a great product ....it does not mean that everything they make will be as good. Perhaps they priced something too low to begin with and it is a huge success - a "giant killer" - this does not guarentee that subsequent products will be as good or as great in value.
Example of giant killers are AKG240 headphones, which came out in the late 70's. Some speakers have achieved this too (largely unchanged in 30+ years) Some power amps also, On the source front there has been too much development recently to look as far back as 30 years but I would say there are some DAC's with 5 years under their belt that are largely unchanged and that is an encouraging sign, especially if they are still popular...