An Introduction to the TAP-X
The TAP-X pre-amplifier is designed to offer features never before available in a passive pre-amplifier.
It is important to note however that NONE of these features adds complexity to the signal path. Throughout the
design of the TAP-X pre-amp system we focused on maintaining a pure and direct signal path between your
source and your amplifier. Keeping the signal path clean and simple allows us to use only the finest parts
throughout.
At the heart of the TAP-X is the Intact Audio Autoformer made by Dave Slagle. We take a modified
version of this module (with slightly different level tap locations) and package it with the Bent Audio switching
boards. This results in a remarkable volume control device with a very clean short signal path including the
following features:
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Very small 1db step size from -52 db up to +7db
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100% passive signal path
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Full remote control of volume, mute,right/left balance, display, and buffer mode.
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Up to +7db of gain
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Extremely close Right/Left channel level matching – closer than any traditional pot.
The above functions and features are all part of the one step volume control process - no additional
circuits are introduced into the signal path to perform these functions.
Another significant benefit of the Autoformer is the way it treats impedances - the load your source
'sees' and the 'drive' to your amplifier. As the volume level is turned down to typical listening levels the output of
the TAP-X does a better and better job of driving cables and amplifiers. From an impedance point of view the
TAP-X 'looks' much like an active pre-amp. It does this - as it does with the above features - without adding
additional circuitry to the signal path. This 'impedance translation' is one of the primary reasons that Autoformer/
Transformer level controls are particularly well suited to passive pre-amplifier designs.
The modular design of the TAP-X Autoformer Pre-amp allows for many features not previously
possible - like balance control and auto gain mode. This modular design also cleans up the 'rats nest' of wires
inside other Autoformer / Transformer pre-amps and keeps the signal path much cleaner and shorter.
Component quality is extended beyond the Autoformer itself to all surrounding components. TAP-X
uses only the highest quality components throughout. Arlon (Teflon like) PC board substrates and OCC long
crystal copper wire are used for all signal path boards and wiring.
All these attributes combine to create a pre-amplifier with a very direct and clean signal path and yet
one that offers full functionality.
