T+A Elektroakustik P 10 - Handbuch (Seite 24)

Welcome.
We are delighted that you have decided to purchase a  product. Your new  P10 valve pre-amplifier is a Hi-Fi
unit of the highest class, which has been carefully designed and developed with the wishes of the demanding music
lover as absolute top priority.
We live in the age of broad-band media such as SACD and DVD-Audio, which are capable of storing and reproducing
frequencies far above 20 kHz. Classic valve amplifiers are simply unable to meet the demands of these media. That is
why we came to the conclusion that a completely new valve-based amplifier was required. The P10 incorporates new
circuit technology and newly developed valve types, and as a result leaves conventional valve technology with all its
limitations trailing in its wake.
For many years it has been widely acknowledged by many Hi-Fi enthusiasts as well as studio professionals that
interference potentials travel between the individual devices of a Hi-Fi system via the numerous connections. So-called
'earth loops' are the inevitable result of multiple earth (ground) connections, such as the earth connections of the mains
and aerial systems, and also the shields which screen signal cables, and these can also cause interference, with an
audible adverse effect on sound quality. The problem can be eased by using symmetrical connections, but this is not a
complete solution since all the devices in the system are still electrically connected.
With the P10 B has introduced an entirely new idea in an effort to solve this problem. B CI (Complete Isolation)
technology eliminates interference coupling completely. CI technology consists of two components: all-pole (completely
isolating) input switches and differential signal inputs with 'floating ground'.
Standard input switches disconnect the signal conductors between the source device and the amplifier, but the electro-
mechanical all-pole input switches used in the P10 also isolate their earth connections. This means that the P10 is
completely isolated electrically from all source devices which are not currently providing the signal being auditioned. The
only remaining connection is the one to the source device to which the user is actually listening. This arrangement
minimises the network effect of the Hi-Fi system, and eliminates undesirable loops and feedback.
In order to exclude the possibility of earth loops in the connection between the amplifier and the currently active source
device, the active input can also be switched to 'floating ground'. At this setting the P10’s input is switched over to
differential mode, eliminating the low-impedance earth connection between the source device and the P10. This mode of
operation works in a similar way to a symmetrical connection - although in the case of the P10 it can also be used with
normal, non-symmetrical source devices and standard Cinch cables.
In summary: interference potentials can build up in a Hi-Fi system and its wiring, but B CI technology reduces all these
potentials to the absolute minimum. The result is phenomenal dynamics, great precision of reproduction, and total freedom
from interference.
The P10 also exploits the latest semi-conductors and micro-processors in addition to its innovative valve technology.
However, the semi-conductors are not employed for signal amplification - the signal processing in the P10 is carried out
exclusively by means of valves! In the P10 the semi-conductors are used for a number of important auxiliary purposes,
such as the constant checking and monitoring of all operational parameters. As a result the P10 is extremely secure and
reliable in operation. For example, the amplifier informs you automatically if the valves should lose their optimum
operating characteristics at any time due to inevitable ageing effects.
The P10 also sets new standards in many other respects, such as special vibration absorbers in the case feet. These
prevent external sound and mechanical vibration reaching the delicate valves, where microphony effects can have an
adverse influence on sound quality.
This unit is the embodiment of innovative thinking and solid quality, exploiting the finest materials and components
available, and all these factors contribute to a machine which will satisfy your most stringent demands and your most
searching requirements for a period of many years.
Our production areas are supervised by highly qualified expert staff, and all final production units are checked
comprehensively by a fully automated, computer-controlled system to ensure uniformly high quality. We guarantee that
our products meet our own specifications to the full.
At all stages of production we avoid the use of substances which are environmentally unsound or potentially hazardous
to health, such as chlorine-based cleaning agents and CFCs.
We also aim to avoid the use of plastics in general, and PVC in particular, in the design of our products. Instead we rely
upon metals and other non-hazardous materials; metal components are ideal for recycling, and also provide effective
electrical screening.
We would like to take this opportunity to thank you for the faith you have shown in our company by purchasing this
product, and wish you many hours of enjoyment and sheer listening pleasure with your amplifier.

elektroakustik
 All the components we use meet the German and European safety norms and standards which are currently
valid. The operation instructions, the connection guidance and the safety notes are for your own good - please
read them carefully and observe them at all times.
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