User manual TANNOY WESTMINSTER ROYAL

[. . . ] OWNER'S MANUAL Estd. 1926 In combining the best of traditional crafts and the latest production and design skills Tannoy presents the Westminster Royal SE loudspeaker. Cabinets in selected hardwoods are hand finished and polished to a standard that is unsurpassed. The Westminster Royal SE offers a compound horn loaded enclosure driven by classic Dual ConcentricTM technology. Based around the Alcomax 3 version of the famous 15 inch Tannoy Dual ConcentricTM the Westminster Royal SE now features the benefits of signal handling by gold-plated terminals with bi-wire/normal wiring and a hard wired time compensated crossover network. [. . . ] 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. 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. The side grilles are service removable only, by pulling them away from locating dowels mounted on the cabinet. Do not use excessive force and take care not to damage the solid walnut mouldings. Loudspeaker System Adjustment Each loudspeaker is fitted with two controls located on the front baffle beneath the detachable grille. They can be used to compensate for the varied acoustic characteristics of listening rooms. The controls should be adjusted with the amplifier tone controls in the 'flat' or uncompensated position. This is most easily done by rotating the amplifier balance control to select first one loudspeaker and then the other. It allows the output of the high frequency compression drive unit to be increased or decreased from the linear or 'flat' position over a frequency band from approximately 1kHz to 20kHz. The ROLL OFF control has five positions (+2, level, -2, -4 and -6dB per octave) and provides adjustment at extreme high frequencies from 5kHz to 20kHz. The ENERGY control has a shelving effect over the 1kHz to 20kHz frequency band whereas the ROLL OFF control increases or decreases the slope of the extreme high frequency response hinging about 5kHz. The flattest, most linear response from the loudspeaker will be obtained with both controls set at the LEVEL position, and this position should be used for initial listening tests. If the overall high frequency sound quality seems too prominent the -1. 5 or -3 positions for the ENERGY control should be tried. If the sound appears subdued in the treble region +1. 5 or +3 settings may be preferred. Once the ENERGY control setting has been established the ROLL OFF control can be adjusted to reduce or slightly increase the extreme high frequency content if necessary. Remember the changes that can be made by moving either control from one position to another are subtle. They may not easily be heard if the programme material has very little content in the frequency band under consideration. The correct setting will be found when the loudspeakers are no longer evident and only the musical performance is heard. Running in Like all loudspeakers, the drive unit in your Westminster Royal SE requires a while to reach optimum performance, as the stresses in the materials relax - especially in the suspension system. For this reason, it is beneficial to run the system at fairly high levels at normal room temperature, for approximately 20 hours to achieve best results. 6 Tannoy Dual Concentric TMDrive Unit One of the unique advantages of the Tannoy Dual ConcentricTM principle is that the low and high frequency sound radiation is generated on the same axis. The high frequency unit is mounted behind, and concentrically with, the low frequency unit. High frequency sound radiates from the centre of the low frequency unit through a carefully designed high frequency exponential horn. [. . . ] 8 Electrical analogue - behaviour at low frequencies MMS C MS Zf R MS Zr Zr At 300 Hz both horns radiating -6 dB Below 300 Hz rear horn radiates (Z r low resistance, RMS high reactance) (power disspitaes in Z r) Figure 8 shows that although the drive unit is a two way system (low frequency cone, and high frequency compression unit) the total system behaves as a three way loudspeaker with the lower crossover point, at 300 Hz, performed by the acoustical mechanism of the cabinet. 9 Care of the Cabinet The cabinet is constructed from carefully selected solid walnut and walnut veneers that have been hand waxed before dispatch from our finishing workshop. To maintain the natural wood appearance it is important that only a wax of similar formulation is used. 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. If necessary mask off the side grilles carefully with clean paper, tucking it in and around the sides of the grilles. [. . . ]