How we change what others think, feel, believe and do
Say that what they are suggesting is too much for what you need. Indicate that you need less.
Indicate the things that they are suggesting which you agree with and then list the remaining things that are not required.
You can also say that what is being asked will cost you too much money or too much time.
Yes, I know it has a 100db output, but I just don't need that. All those knobs are also just too much for me.
I think we're gilding the lily here. Adding all those features just makes it more expensive and there's no need for them.
You're asking too much of me. I may be able to help a bit, but I just don't have the time for all this.
By indicating that the person is offering or asking too much you are indicating that there is a negotiable position where these 'too much' items are either removed or are compensated for in some other way (to your advantage, of course).
This objection only rejects a part of the solution, which is different from the 'No Need' approach, which rejects all of it. In this way, the 'too much' response is friendlier as it allows the other person to continue to seek to persuade you.
Sometimes when you are buying something and they do not have the next model down in the series, by asking for this you can get the higher model for the lower model's price.