Building a rigid cabinet that does not resonate at some frequencies is a top priority for good sound. A really strong rigid cabinet made from relatively strong inert materials can be very expensive. There are companies that even go to the extreme of machining cabinets from solid blocks of aluminum. Some cabinets alone cost thousands of dollars.
Crossover capacitors and inductors also work best if the values are precise and the dielectric material is suitable. An inexpensive capacitor with a 10% tolerance can cost less than a dollar; a precision capacitor with a 1% tolerance and a high-quality dielectric can cost $30. Inductors can be even more expensive.
And then there are the speakers or drivers themselves.
There are tweeters that cost from $2 to $400, and the better ones can give more power output with lower distortion. They are made in many designs and types, each with its own design advantages and drawbacks.
There are midrange and bass drivers that have cones made from many different materials that have widely varying costs, each of which have different rigidities and weights. Low weight and high rigidity are the goals. The magnet structure can be made from different grades of magnetic iron alloy and this gives different magnetic strengths.
All of the above can be manufactured with varying degrees of precision and quality control, which are also major cost factors.
The bottom line is that every speaker designer wants low distortion, high sensitivity, and a product that will sell for a particular price. He has a lot of conflicting design choices to make. That is why speaker distortion, quality and prices are all over the place.
The consumer, of course, also wants the lowest distortion for his dollar, and will have varying priorities regarding speaker size, cost, appearance, and type. The trick is to find out which speaker models deliver the best performance for the buck in each price range and type.
Good sound simply means low distortion, and speakers, amplifiers, and signal sources all contribute some. Achieving low distortion in any component of the audio system involves cost decisions by engineers that affect the price of the product and the resulting sound quality.
Originally Posted by TyatNU82
I know all speakers sound different, some bad some good, and it is all subjective to the listener...but I was wondering, what makes a speaker sound better than another, what are the internal parts of the speaker that make it sound better, or makes a speaker cost a lot more than another?