So I have a couple of questions that I am sure will be very easy for you to answer:

1) (Please correct me if I am wrong)

- AMP: Is used to amplify sound ONLY. This is used in conjunction with a preamp. It will make your **** louder.


- PRE AMP: Is used to manipulate sound and decode it to a certain format. I.e. DTS, Dolby Digital, Pro Logic... Can I use a preamp without an AMP????


- Receiver: A cheaper version of the combined two above with more bells and whistles and lesser attention and quality to performance and parts.

How is that? I am new can you tell


2) A little harder question:

I really like the PSB speakers and I know that they are closely linked with NAD...

There is this receiver at the top of the line which goes for about $4000 or something around there:

http://nadelectronics.com/products/av-receivers
T785 A/V Surround Sound Receiver

and then there is the Preamp: M15 Surround Sound Preamplifier

and the M25 7-Channel Amplifier which go for about $4000 each.


My question is how are the NAD preamp combined with the NAD AMP that much better than their top of the line $4000 all in one AV receiver?