Tannoy Berkeley

 BERKELEY

This system provides the high power handling capacity and sensitivity of the HPD385A unit in a compact enclosure where insufficient space is available to accommodate the Arden.

A carefully designed dual ducted port reovides optimum bass characteristics in relation to enclosure volume, and the loudspeaker is front recess mounted to ensure unimpeded treble response. High desnsity stock is used throughout the cabinet construction and massive internal reinforcement renders the structure free from spurious resonances. Each section of the two-part grille can be removed separately to facilitate treble adjustment.

 Components

Integrated Drive System

The Tannoy Integrated Drive System consists of a direct  radiator bass unit and a high frequency horn-loaded compression driver both located concentrically within the same frame and magnet assembly, this is why it is known as the dual concentric system.

Bass Unit

This is a low resonance speaker with a 2" high temperature voice coil. The unique Girdacoustic reinforced cone ensures true piston action and smooth performance extending well into the midrange region.

Treble Unit

High frequencies are reproduced by a horn-loaded compression driver utilizzing a duralumin diaphragm and a 2" diameter aluminium voice coil.

Crossover Network

The crossover network receives the electrical energy fromm the amplifier and divides it between thr high frequency compression driver and the low frequency bass driver and makes a vital contribution to the overall performance of the system.

Tannoy crossover networks are of the highest quality; capacitors are non-polarized, solid dielectric types for low lossles and close tolerances; resistors and inductors are very generously rated; and all components are assembled on a fibreglass printed circuit board for maximum reliability.

 System adjustment

The Tannoy system is provided with two controls located on the front baffle. These are labelled "Roll-off" and "Energy". They can be used to compensate for the acoustic characteristics of the listening room and should be adjusted with the amplifier controls in the flat or uncompensated position. Each loudspeaker system should be adjusted individually. This is mot easily done by rotating the amplifier Balance control to select the desired loudspeaker.

The Energy control has five positions and enables the output of the high frequency driver to be increased or decreased over its entire range from 1 kHz to 20 kHz. The Roll-off control affects only the extreme high frequencies, i.e. those above 5 kHz.

The flattest response will be obtained with both controls set at the "Level" position, which should be used for initial listening tests.  If the overall high frequency sound quality seems too prominent, the -1 or -2 positions for the Energy control should be tried. If the sound is subdued +1 or +2 will be preferred. Once the Energy setting has been established the Roll-off control can be adjusted to reduce extreme high frequency content if necessary.

Enclosures

Tannoy enclosures are solidly constructed from high density particle board and are lined with acoustic foam to absorb reflections and eliminate standing waves and bitumen to damp mechanical resonance. The exposed natural woodgrain surfaces of each enclosure are of American Walnut veneers. The cabinets are carefully handrubbed with oil and wax, which enhances the richness of the wood and affords excellent protection. Both the Arden and the Berkeley are braced internally to reduce spurious resonances which can occur in large panel areas, and ported to provide low frequency loading, thereby reducing distortion and extending bass response.

Specifications

Low Frequency Direct Radiator

Maximum Diameter:  420 mm (16 ½")

Voice Coil Diameter:  50 mm (2")

Bl Factor in gauss/cm:  20 x 10⁶

Fundamental Resonance:  20 Hz

High Frequency Compression Driver

Duralumin Diaphragm:  50 mm (2")

Voice Coil  Diameter:  50 mm (2")

Horn Cut-off Frequency:  500 Hz

Drive System:  3828

Power Handling Capacity:  85 W

Nominal Impedance: 8 ohms

Frequency Response:  35 Hz - 20 kHz, ±4 dB

Sensitivity; Input Watts produce 96 dB at 1 m:  3

Crossover Frequency:  1 kHz

System Dimensions (H x W x D):  840 x 540 x 310 mm (33" x 21" x 12")

Weight:  41 kg (shipping)