User manual TANNOY PROFILE 633

[. . . ] Signal handling is by gold-plated terminals with captive link bi-wire/normal wiring and a hard wired time compensated crossover network. The Turnberry SE offers high frequency energy tailoring through a high current gold-plated switch block. Silver plated copper Van den Hul wiring is use throughout, together with specially selected high quality crossover components. The specially designed twin-roll impregnated fabric surround used on the drive unit's cone, ensures midrange purity combined with tight, controlled bass. Tannoy - A Short History In the early days of broadcasting radio sets needed both low and high voltage DC power that had to be supplied by batteries. [. . . ] An 80dB dynamic range corresponds to voltages of between 50 Volt and 0. 005 Volt at the loudspeaker terminals or equivalent currents of between 0. 0006 and 6 Amp. This is a truly wide range of electrical signals to pass down one cable without some interactions causing a loss of resolution in the very small signals. When electricity passes down a wire or cable, what goes in at one end is unfortunately different from what comes out at the other. The degree of loss or modification of a signal depends on the physical characteristics of the cable and the nature of the signal. Heavy electrical currents flowing down thin conductors cause heating effects. Very high frequency signals passing along conductors or cables of certain lengths cause electromagnetic radiation effects (aerials). Electrical cables are selected for minimum loss and maximum information resolution considering the type of electrical signals they are designed to carry. A good solution to the problem is to 'bi-wire' the loudspeakers to the amplifier. This means providing two separate sets of cables from the power amplifier to each loudspeaker and dividing the electrical signals into high current, 'slow' signals and light current, 'fast' signals. Of course, the loudspeaker must be fitted with two pairs of terminals to take the two sets of cables; your Tannoy loudspeakers are of course equipped for just this type of connection. Bi-Wiring Bi-wiring releases the full potential of the Tannoy Prestige loudspeakers. Two complete sets of cable are required. Deal with each 'side' of the system separately. However, for ultimate fidelity the enthusiast will find it is best to use these loudspeakers with their grilles removed during listening. The large front grille is removable for access to the front panel controls. Insert the key provided into the lock at the bottom of the main grille assembly and turn anti-clockwise to release. Pull the bottom of the grille away from the cabinet; the grille will drop down from its upper location. Take care not to damage the solid walnut lower part of the cabinet. To replace the grille engage the top of the grille into the slot in the cabinet and push the grill into the recess. Apply slight pressure to the bottom whilst turning the key clockwise to engage the lock. Loudspeaker System Adjustment Each loudspeaker is fitted with a treble energy control located on the baffle beneath the detachable front grille. This high current switch block control can be used to compensate for the varied acoustic characteristics of listening rooms. The control should be adjusted with the amplifier tone controls set to the 'flat' or uncompensated position. Each loudspeaker should be adjusted individually. This is most easily done by rotating the amplifier balance control to select first one loudspeaker and then the other. [. . . ] A jar of specially formulated wax is included with each loudspeaker. This wax should be applied very sparingly with a soft lint-free cloth (muslin for example) taking great care to avoid putting wax on the grille material. Work the wax into the wood covering a small area at a time. In common with all solid wood furniture, exposure to extremes of heat, cold and varying humidity will cause the wood to ease slightly. [. . . ]