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TA702s
Pre Amplifier
free P&P UK. Outside please ask. When the TA702 preamp is in passive mode, the signal path is minimalist! The signal travels from the input phono connectors to the selector switch, then to the potentiometer then the ultra low distortion unity gain buffer, the mute relays and then directly to the output sockets. This configuration achieves the best sound. However, in some circumstances the gain may be insufficient - for example: if the recording is at a very low level, or it is necessary to have the system playing at high pressure level (for a bit of party fun). To accommodate all situations, 18db of gain may be added simply by switching to Active Mode. In Active Mode, an ultra-low-distortion discrete transistor amplifier of purist audiophile quality is switched into the signal path between the volume control and the output connectors. This adds 18dB of gain when ultimate transparency is forgone in order to enjoy some 'high fidelity public address'! (Please be considerate of neighbours, and mind your hearing.). In truth, when one is listening at very high volumes to Mahler or Frank Zappa, via Led Zeppelin and Faithless, the minimal degradation in sound is barely detectable. The TA702 preamplifier is housed in a very simple spectacular mirror finished stainless steel case suspended on our unique spring/bellows air-damped isolation feet. This vibration isolation system isolates ground-borne vibration from 3.5Hz and up to ensure the most open sound possible. Connectors are heavily gold plated phonos and we virtually insist that, for the best possible sound, all interconnections are by way of our DCT 300 Isolda interconnects. The mains input is by way of a fused IEC connector. The low level DC is provided by the Low Level DC Power Supply. Specifications: The low level DC is provided by the Low Level DC Power Supply. The Low Level DC Supply - technical details All Townshend Audio electronics employ a common design of low level DC power supply. circuitry modelled on the circuitry used in the acclaimed TA565 CD Universal Player. The incoming AC is transformed from 230V AC (110V optional) by high RF isolation “E-I” overload protected transformers to the low voltage required by the dual Schottkey diode rectifier bridges. This raw DC is then filtered by a three stage resistance/capacitance/inductance network to block seriously attenuate all RF and switching noise from 2Hz up 3Ghz +. The plus and minus DC is then fed to the various amplifier/buffer stages where it is regulated precisely by a discrete component, ultra-low-noise, precision voltage stabiliser circuit. This further rejects RF interference. The power supply filter arrangement is so effective that external power conditioners and state-of-the-art mains leads have, so far, had no discernable effect on the sound; however, their use is not discouraged. The power arrangements for pedantic 'housekeeping' of other functions (such as the remote control function, and the indicator LEDs) is derived from a second, completely independent, transformer/rectifier/filter circuit. A slow-on/quick-off circuit, integrated with the mute circuit, ensures that no speaker-damaging transient surges appear at the output terminals.
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