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# sennheiser vs akg. ( HD650 or DT 990 or AKG Q701 or AKG 702 or AKG and any other AKG or headphones) - Page 2

Is the Fiio E17 better then the Fiio E10 ?.

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Quote:
Originally Posted by rei075

Is the Fiio E17 better then the Fiio E10 ?.
Yes.
Quote:
Originally Posted by rei075

Is the Fiio E17 better then the Fiio E10 ?.

17 - 10 = 7

The E17 is 7 times better than the E10.

Brilliant!

Quote:
Originally Posted by OperatorPerry

17 - 10 = 7

The E17 is 7 times better than the E10.

Not quite:

17/10 = 1.7

So the E17 is only 1.7 times better.

Quote:
Originally Posted by KimLaroux

Not quite:

17/10 = 1.7

So the E17 is only 1.7 times better.

No, that's not how Fiio product numbering works.  Fiio uses the Riemann zeta function to relate product performance and number.

On the real line with , the Riemann zeta function can be defined by the integral

where  is the gamma function. If  is an integer , then we have the identity

=

So,

To evaluate , let  so that  and plug in the above identity to obtain

=

Integrating the final expression in gives , which cancels the factor  and gives the most common form of the Riemann zeta function,

which is sometimes known as the p-series.

The Riemann zeta function can also be defined in terms of multiple integrals by,

and as a Mellin transform by,

or , where  is the fractional part.

The Riemann zeta function can also be defined in the complex plane by the contour integral

for all , where the contour is illustrated above.

The Riemann zeta function is related to the Dirichlet lambda function  and Dirichlet eta function  by

and

It is also related to the Liouville function  by

Furthermore,

where  is the number of distinct prime factors of .

Perry

Edited by OperatorPerry - 3/21/13 at 7:19pm

^ LOL

^^ lol

Quote:
Originally Posted by OperatorPerry

No, that's not how Fiio product numbering works.  Fiio uses the Riemann zeta function to relate product performance and number.

On the real line
with

, the Riemann zeta function can be defined by the integral

where

is the gamma function
. If

is an
i
nteger

, then we have the identity

=

So,

To evaluate

, let

so that

and plug in the above identity to obtain

=

Integrating the final expression in
gives

, which cancels the factor

and gives the most common form of the Riemann zeta function,

which is sometimes known as the p-series.

The Riemann zeta function can also be defined in terms of multiple integrals by,

and as a Mellin transform by,

or

, where

is the fractional part.

The Riemann zeta function can also be defined in the complex plane by the contour integral

for all

, where the co
ntour is illustrated above.

The Riemann zeta function is related to the Dirichlet
lambda

function

and Dirichlet eta function

by

and

It is also related to the Liouville function

by

Furthermore,

where

is the number of distinct prime factors
of

.

Perry
🐴+1
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