Lampizator Atlantic 2 TRP, User Manual

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LampizatOr- ATLANTIC2 TRP DAC Manual
COOPERATION WITH THE PREAMP
The DAC with volume control should sound audibly cleaner and more direct without
any preamp between the DAC and the amp. The preamp, however good, will veil a lot
of the DAC’s natural clarity, speed and directness. If you feel you need the preamp
nevertheless, use DAC at the full volume or order your DAC without volume module.
The load presented by the preamp or amp or simply the next analog component that
the DAC sees, should be as high as possible. It is measured in kilo-Ohms and 100Kilo
Ohms is a perfect ballpark value. More is VERY rarely seen. 47 K is next common
value, and it is great too. 20 K is kind of on a low side, but we can handle that. Lower
than 20k is bad news. We must configure the DAC with additional cathode follower
buffer stage.
The DAC will not be damaged in any way, but at around 10K of load the dynamics of
the dac will start to fade away.
Having said that - every properly designed amp or preamp keeps the load value above
40k. And if it doesn’t - we simply don’t choose such amp because it was not designed
with audiophiles in mind.
DIGITAL INPUTS
There are three data types that our DAC can read internally: biphase, i2s and USB.
The bi-phase can come in many forms, but the most common are:
S/PDIF (sony/Philips data inter face) by means of single ended square wave of
amplitude around 0,5 V pp
AES/EBU - the same as S/PDIF but the signal is a mirrored (balanced) pair of square
waves around 2,5 V pp (max. 5 V pp)
TTL - just as S/PDIF but 5 V pp
TOSLINK - a fiber optic transmission of S/PDIF producing at the DAC the 5 V TTL
electrical signal.
RS422 - it is practically the same as AES/EBU
The i2S is the same as biphase but separated into 4 signals - each carrying only one
type of information. Biphase encodes 4 groups of informations in one signal stream.
Specifically they are: System Clock, Bit Clock, Left/Right Clock and Data. We can
install these four in any type of connector, because there is no standard. Most
customers use RJ45 LAN socket or simply four RCA sockets just like in TV RGB.
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