There have been numerious posts lately about how much to spend on gear, and how much quality money buys, etc, etc.. The problem with this question is that the answer changes as you move up the price ladder. Let me explain.
At the lowest price levels, the manufacturer must compromise on quality of all the physical materials that create the product. For instance a very cheap amplifier must have a cheap transformer, cheap power supply, and cheap circuitry. This impacts quality greatly. So, as you move up from say a £100 amplifier to a £800 amplifier, the manufacturer is free to use better and better parts. This reaps huge gains in sound quality.
After a certain point, moving up in price does not allow for the use of better parts since there are no better parts. For amps, this price point is probably around £1000. After than point, all the manufacturer can do is improve design. This cost of good design is debatable, but there is no reason that a £1000 amplifier cannot sound as good or better than a £5000 amplifier since all the same parts are available to both manufacturers. The £1000 amplifier might in fact have the better design.
This same principle is true for all electronics and speakers. Sure, B&W can claim it has to charge more for it's "diamond' tweeters, but there are many designers that feel cheap aluminum or silk can sound even better.
Now, some people will say that the component cost element of audio product design never is eliminated regardless of price. To this, I say, that whether it's completely eliminated or it is simply negligable is irrelevent. It simply has little or no impact to performance of the products once you move beyond a certain price level.
So what all this means is that, yes you should upgrade your £100 electronics to reap big gains in quality. But, as for upgrading your £800 amplifier to a £2000 amplifier, it is much less likely to produce gains at all. Price matters at the low end, once you hit £1000 or so, it's just preference and system matching that matters for the most part.
At the lowest price levels, the manufacturer must compromise on quality of all the physical materials that create the product. For instance a very cheap amplifier must have a cheap transformer, cheap power supply, and cheap circuitry. This impacts quality greatly. So, as you move up from say a £100 amplifier to a £800 amplifier, the manufacturer is free to use better and better parts. This reaps huge gains in sound quality.
After a certain point, moving up in price does not allow for the use of better parts since there are no better parts. For amps, this price point is probably around £1000. After than point, all the manufacturer can do is improve design. This cost of good design is debatable, but there is no reason that a £1000 amplifier cannot sound as good or better than a £5000 amplifier since all the same parts are available to both manufacturers. The £1000 amplifier might in fact have the better design.
This same principle is true for all electronics and speakers. Sure, B&W can claim it has to charge more for it's "diamond' tweeters, but there are many designers that feel cheap aluminum or silk can sound even better.
Now, some people will say that the component cost element of audio product design never is eliminated regardless of price. To this, I say, that whether it's completely eliminated or it is simply negligable is irrelevent. It simply has little or no impact to performance of the products once you move beyond a certain price level.
So what all this means is that, yes you should upgrade your £100 electronics to reap big gains in quality. But, as for upgrading your £800 amplifier to a £2000 amplifier, it is much less likely to produce gains at all. Price matters at the low end, once you hit £1000 or so, it's just preference and system matching that matters for the most part.