Is there a magic formula for spending on components in a system

 I believe the allotment of funds across components differs with budget. For instance, if budget is $1000 than it might prove best to invest more on both the integrated amplifier and the source component than the speakers. However, as the budget increases a greater allotment might be justified towards the speaker. In my case, with a system that had a retail price of ~$14,000, the speakers retailed at $3000, the amplification at $6500, the source (digital) at $2600, and cables at ~$2000. With the exception of my DAC all components were purchased at less than retain price such that the allotment for active components is more evenly distributed, cables were purchase at greatest discounts from retail. I believe that I would have to spend 2x the retail cost of my speakers to get a significant upgrade. I believe my amplification and source components justify that.

  

Ha, +1 Al, a great response which fell within the 3 minutes of my two responses. 

OK, a possible formula given a digital system:

Source - 20 to 25%
Amplification - 25 to 35%
Speakers - 25 to 45%
Cables - 10 - 15%

Summation of the mid value of each components class = 100%