- ... minimalism1
- This kind of minimalism reflects itsself also in the circuits, see
for example the products of Nelson Pass, Greenwall or Brain Audio
(what happened to their super transistor?). They claim to use just
one active amplifying part (usually a Mosfet) and very few passive
parts. I'm just wondering then why you have to pay the same amount
of money like for the ``parts grave'' of Mark Levinson et.al.
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- ... MC2.1
- Moving Coil
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- ... amplification2.2
- The amplification is calculated according to the equation
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- ...2.3
- See a similar derivation in [Skr88] on page 141f.
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- ...2.4
- If you choose the equations turn out as
which means that we can omit one precision resistor.
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- ... one2.5
- Audioplan Homogen (alias B&K) made in 1986
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- ... hot2.6
- The voltage regulators of the phono preamplifier stage also need small
heat sinks.
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- ... reflections2.7
- It is very questionable whether reflections play any role in audio
applications at all. On the other hand it does not hurt to prevent
them.
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- ... amplification3.1
- The amplification is calculated according to the equation
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- ... distances4.1
- The opposite philosophy is hold by Naim: their power supply regulation
is either a simple one located in the power amplifier or an improved
one within an external power supply (Flatcap, Hicap, Supercap). This
allows to get higher sound quality when connecting the preamplifier
to an external power supply. If the power supply regulation were located
within the preamplifier then chances were high that a much better
sound quality could be reached with the cheap power supply in the
Naim power amplifier-but Naim would not sell that many external power
supplies as well.
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- ...6.1
- It is very interesting to note that the graininess of digital sources
disappears for the bigger part if the preamplifier drives a better
power amplifier!
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- ...A.1
- This is not the corner frequency of the low pass but the frequency
where the amplification reaches +3 dB.
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- ... PSRRA.2
- Power Supply Rejection Ratio
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