Tannoy VQ Series Quick Start Manual page 5

8
VQ Series
Introduction
The VQ full range products utilize a unique driver technology to radiate a coherent single point source for superior dispersion control when coupled to our single horn.
This advanced design aligns the acoustical centres of the transducers providing a single coherent wavefront emanating from the throat.
The driver uses two concentric annular ring diaphragms. The larger of the two has a 3.5" voice coil and reproduces frequencies from 400 Hz to 7 kHz. Another major
advantage here is that there is no crossover anywhere near the vocal region ensuring the most natural and phase coherent reproduction at this critical area. The 2" HF
diaphragm takes over at 7 kHz to 22 kHz by way of a passive or an active crossover. The external casting features extensive heatsinking ensuring good heat transfer for
high power handling and very low power compression.
Connectors/Cabling
Input Connector Panels
Note : The VQ 60 and VQ 100 are configured as standard for Bi-Amp operation.
Tri-Amp operation is possible using the Barrier strip input terminals.
The VQ DF is configured as standard for single amp operation. Bi-Amp operation is possible using the Barrier strip input terminals.
The VQ MB is configured for single amp operation.
VQ 60 / 100 VQ DF
VQ MB
The VQ 60, VQ 100 and VQ DF are fitted with 4-pole Neutrik Speakon´ connectors and barrier strip for fixed installations.
Speakon Connections -
Speakon has the following advantages over EP and XLR type connectors:
All terminations are solderless; this makes life easier at the time of installation or when field servicing is required. Contacts will accept 6 sq. mm wire with an outside
diameter of up to 15 mm and a current rating of 30 Amps. The pins of the 2 Speakon sockets identified input/output on the rear of the input panel are paralleled within
the enclosure to facilitate the connection to additional VQ loudspeakers (except the VQ MB). Tannoy has adopted the standard professional audio wiring convention for
the VQ product.
VQ 60 and VQ 100
Speakon Connections
LF Negative (-ve)
LF Positive (+ve)
MF/HF Positive (+ve)
MF/HF Negative (-ve)
Barrier Strip Connections
The barrier strip accommodates bare wire, tinned leads or spade connectors. The barrier strips are specifically designed for utilization in fixed/permanent installations.
The VQ 60 and VQ 100 are configured for Bi-amp operation; by removing the 4 link wires between the two barrier strips on the termination panel tri-amp operation is
possible. The VQ DF is configured for single amp operation; by removing the 4 link wires between the two barrier strips on the termination panel bi-amp operation is
possible.
VQ 60/100 Bi-amp – Connect LF amplifier to LF +/- on top row of barrier strip.
Connect MF/HF amplifier to MF/HF +/- on bottom row of barrier strip.
VQ 60/100 Tri-amp - Connect LF amplifier to LF +/- on top row of barrier strip.
Connect MF amplifier to MF +/- on top row of barrier strip.
Connect HF amplifier to HF +/- on top row of barrier strip.
VQ DF Single Amp - Connect MF/HF amplifier to MF/HF +/- on bottom row of barrier strip.
VQ DF Bi-amp - Connect MF amplifier to MF +/- on top row of barrier strip.
Connect HF amplifier to HF +/- on top row of barrier strip.
VQ MB - Connect amplifier to LF +/- terminals.
Note that looping out to additional loudspeakers will have the effect of reducing the load on the amplifier. Avoid loading amplifiers too low. If the amplifier is rated for
4 ohms minimum, don't give it a 2 ohm load. Even when the amplifier is rated down to 2 ohms remember that in order to keep up with the power the circuit will have
much higher current than before and the wiring will have to handle it. Not only will the wiring losses grow but the damping factor of the system will be degraded. It
might be better to run separate cables from the amp to the speakers or divide the load across two amplifier channels.
Cable choice consists mainly of selecting the correct cross sectional area in relation to the cable length and the load impedance. A small cross sectional area would
increase the cables series resistance, inducing power loss, and response variations (damping factor).
Connectors should be wired with a minimum of 2.5 sq. mm (12 gauge) cable. This will be perfectly satisfactory under normal conditions. In the case of very long cable
runs the wire size should exceed this. The following table shows the change in resistance, sensitivity loss and damping factor due to the effects of cable diameter and
length for two nominal impedance loads (4 ohms & 8 ohms). Use this table to determine a suitable cable diameter for the length of run you require. For resultant
damping factor, values greater than 20 are generally considered adequate for high quality sound reinforcement systems.
Quick Start Guide
VQ DF Speakon VQ MB Speakon
Connections Connections
LF Negative (-ve)
No connections on pins
1+ and 1- LF Positive (+ve)
MF/HF Positive (+ve)
No connections on pins
MF/HF Negative (-ve) 2+ and 2-
9