The T-Series is intentionally designed to address an extremely wide range of small to medium sized applications from multiple cabinet line arrays through to single standalone loudspeakers for deployment in locations sharing the same fundamental requirements, to achieve precise control of directivity and maintain this to the lowest possible frequency. A combination of techniques is used; dipolar low frequency driver arrangements, low compression venting with high excursion drivers and a unique combination of a rotatable waveguide horn and acoustic lens. The unobtrusive visual design, compact dimensions, light weight, high power and exemplary directivity performance not only embodies the d&b System reality but makes the T-Series loudspeakers the perfect option for speech and music.

T-Series cabinet dimensions in mm (inch)

T10 loudspeaker
The T10 is a passive 2-way loudspeaker housing two 6.5" drivers positioned in a dipolar arrangement and a 1.4" HF compression driver and a passive crossover network. The T10 can be used both as a line array and as a high directivity point source loudspeaker. The HF driver is fitted to a unique waveguide horn producing vertical line source directivity with a 90° horizontal pattern that is maintained down to approximately 600 Hz. An acoustic lens placed in front of the horn widens horizontal dispersion to 105°, rotation of the horn by 90° relative to this produces an accurate point source dispersion transforming a vertically oriented T10 into a standalone full range loudspeaker with 90° horizontal and 35° vertical directivity pattern. The T10 cabinet is constructed from polyurethane integral hard foam, incorporates integrated line array rigging hardware and has an impact resistant finish. The front of the loudspeaker cabinet is protected by a rigid metal grill backed by an acoustically transparent foam, and two EP5 or NL4 connectors wired in parallel are mounted on the rear panel.

T10 electroacoustic concept The unique combination of a rotatable waveguide with horn and an acoustic lens enables T10 to transform from line source to point source mode easily from outside without tools or removing the front grill. It provides a vertical line source with a 90° horizontal dispersion, whilst the integrated lens in the front grill widens the HF dispersion in line source mode to 105°. When the loudspeaker is used upright as a point source, the lens curves the wave front of the line source providing a 90° × 35° dispersion pattern. T10 horn and lens in line source setup T10 horn and lens in point source setup

T10 with D6 and D12
Selecting the T10 configuration in the D6 and D12 dual channel amplifiers enables up to four T10 loudspeakers to be driven by each channel. When the D12 is operated in Mix TOP/SUB mode the T10 cabinets and respective active subwoofers can be linked together locally and fed by a single 4-wire cable from either amplifier output connector.
The D6 and D12 amplifiers have three configurations for T10 cabinets, Line, Arc and PS (point source). The Line or Arc configurations are selected when the T10 loudspeaker is used as a line array. The chosen configuration will depend on the curvature of the array. The Line configuration is selected when groups of four or more T10 cabinets are coupled in a straight long throw array section, where the splay angles to adjacent cabinets are 0° to 2°. The Arc configuration is selected when T10 cabinets are used in curved array sections, where the splay angles to adjacent cabinets are 3° or more. Within a typical array both amplifier configurations are used. The PS configuration is selected when the T10 is used as a single spherical loudspeaker.
For acoustic adjustment the functions CUT, HFA, HFC and CPL can be selected.
Set to CUT, the T10 low frequency level is reduced. The T10 is now configured for use with the T subwoofer or other d&b subwoofers.
Selecting HFA mode (High Frequency Attenuation, PS setup only), the HF response of the T10 is rolled off. The HFA provides a natural, balanced frequency response when a unit is placed close to listeners in near field or delay use. HFA begins gradually at 1 kHz, dropping by approximately 3 dB at 10 kHz. This roll off mimics the decline in frequency response experienced when listening to a system from a distance in a typically reverberant room or auditorium.
Selecting the HFC (High Frequency Compensation, Line or Arc setup only) circuit compensates for loss of high frequency energy due to absorption in air when loudspeakers are used to cover far field listening positions. The HFC circuit has two different settings, which should only be used for those cabinets covering the following respective distances:
HFC1 for distances between 25 m (80 ft) and 50 m (160 ft), and HFC2 for distances further than 50 m (160 ft). The CPL (Coupling) circuit compensates for coupling effects between the cabinets. These effects increase as the length of the line array is extended. CPL begins gradually at 1 kHz, with the maximum attenuation below 400 Hz, providing a balanced frequency response when T10 cabinets are used in arrays of four or more.
The function of the CPL circuit in these amplifiers can be set in dB attenuation values between -9 and 0, or a positive CPL value which creates an adjustable low frequency boost around 65 Hz (0 to +5 dB).

T-Subwoofer
The T-SUB is an actively driven bass-reflex loudspeaker fitted with a high excursion 15" driver. d&b SenseDrive technology is available when powered by the D12 amplifier. It can be used to supplement the LF headroom of the T10 loudspeaker in various combinations, ground stacked or flown, either integrated on top of a T10 array or as a separate column. The loudspeakers are mechanically connected using rigging links on both sides of the cabinet front which slide out when needed, and with a central splay link at the rear of the cabinet. The T-SUB cabinet is constructed from marine plywood with an impact resistant paint finish and a handle in the top panel. The front of the loudspeaker cabinet is protected by a rigid metal grill in front of an acoustically transparent foam and two EP5 or NL4 connectors wired in parallel are mounted on the rear panel.

T-SUB with D6 and D12
Selecting T-SUB mode in the D6 and D12 dual channel amplifiers enables up to two T-SUB loudspeakers to be driven by the respective channel.
When the D12 is operated in Mix TOP/SUB mode the T-SUB cabinets and respective full range systems can be linked together locally and fed by a single 4-wire cable from either amplifier output connector.
For acoustic adjustment the function 100 Hz can be selected. If the 100 Hz mode is selected, the upper operating frequency of the system is reduced from 140 Hz to 100 Hz.
The D12 incorporates d&b SenseDrive for accurate control of driver membranes in d&b subwoofers, resulting in an extremely precise bass performance, even at high levels. SenseDrive is only available using the D12 fitted with EP5 connectors and appropriate 5-wire cabling. For further information please refer to the d&b TI 340 SenseDrive, which is available for download at www.dbaudio.com.

T Series Rigging For line source applications the T10 cabinets are mechanically connected to the T Flying frame and subsequent loudspeakers using the rigging links attached to both sides of the cabinet front and the central splay link at the rear of the cabinet. The T Flying frame is designed to support a maximum of twenty T10 loudspeakers and has a mounting plate that accepts inclinometers such as the Teqsas Lap-TEQ line array positioning tool. All necessary rigging components are mounted to the cabinet and slide out when needed. Splay angles between adjacent cabinets can be set in the range from 0° to 15° in 1° steps. The T subwoofer can also be attached to the T Flying frame either at the top of an array with subsequent T10 loudspeakers attached or as a column of T subwoofers. T10 arrays using three cabinets can be configured using the T Cluster bracket along with a loudspeaker stand, mounted with the loudspeaker stand adapter or flown using the TV spigot with fixing plate. For point source applications the T10 cabinet is fitted with six threaded inserts to accept a variety of rigging accessories for deployment in different configurations. The T Flying bracket is designed to fit tightly around the loudspeaker to produce the minimum visual impact and can be fitted to a loudspeaker stand using the loudspeaker stand adapter or flown using the TV spigot with fixing plate. Similarly the T Horizontal bracket enables the cabinets to be attached horizontally to trusses, walls or ceilings. Apart from accepting the T Horizontal bracket, the threaded inserts also accept the E8/E12 Flying adapter. These can be used together with the TV spigot M10 or the TV spigot 02 with the Pipe clamp for TV spigot to be attached to overhead bars or truss with a tube diameter up to 51mm (2"). Alternatively two T10 cabinets in point source orientation can be arrayed vertically using a set of E8/E12 Flying adapters and the E8/E12 Flying adapter link. A detailed description of the T-Series rigging is given in the T-Series Rigging manual whilst a detailed description of planning and designing T-Series arrays is given in the technical information "TI 385 J, Q and T-Series system design, d&b ArrayCalc". Both can be downloaded from the d&b website as well as the d&b ArrayCalc array calculator at www.dbaudio.com.

T-Series Rigging Examples (click to enlarge)		T-Series Rigging Examples (click to enlarge)

T10 loudspeaker in point source orientation on a subwoofer, with D6 amplifier in dual channel mode	T10 line array on a subwoofer, with D12 amplifier in Mix TOP/SUB mode	T10/T-SUB flown line array with D12 amplifier in Mix TOP/SUB mode

T10 flow line arrays in left/right configuration with D12 amplifiers in dual channel mode.
T10 line array as centre cluster and T10 in point source orientation as fills with D6 amplifiers.
J-SUBs with D12 amplifiers. (click to enlarge)