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Quick Start Guide
TXD series
Models covered by this Quick Start Guide
TXD-081, TXD-121, TXD-151, TXD-252, TXD-12M, TXD-15M, TXD-115, TXD-215, TXD-118, TXD-218.
Thank you for choosing a TURBOSOUND TXD series loudspeaker product for your application. If you would like further
information about this or any other TURBOSOUND product, please contact us. A detailed user manual on this product is
available on our web site at www.turbosound.com
Unpacking the TXD series loudspeaker
After unpacking the unit please check carefully for damage. If damage is found, please notify your supplier at once. You,
the consignee, must instigate any claim. Please retain all packaging in case of future re-shipment.
System Requirements – Passive Models
TXD series loudspeakers, with the exception of the TXD-252 and TXD15M, are passive systems, and require only one amplifier channel for
correct operation, the frequency splitting between the LF driver and the
HF driver being accomplished by the internal passive crossover network
built into each enclosure. These models are equipped with Neutrik
Speakon NL4MP connectors for both input and parallel connections.
Pins 2+ and 2- are not used for passive connections. Always observe the
correct polarity as shown.
Passive connections
(Pins 2+ and 2- not connected)
LF -ve
LF +ve
System Requirements – Bi-amped Models
The TXD-252 and TXD-15M are switchable passive/bi-amp systems,
and when used in bi-amp mode require two amplifier channels and an
external electronic crossover for correct operation. These models are
equipped with a single switchable Neutrik Speakon NL4MD-V-S
connector (in addition to two regular NL4MP connectors for passive
mode), with pins 1+ and 1- being used for the low frequency amplifier
and pins 2+ and 2- for the high frequency amplifier. Always observe the
correct polarity as shown.
HF +ve
HF -ve
Bi-ampconnections
LF -ve
LF +ve
Using Passive Loudspeakers with Subwoofers
TXD series subwoofers are equipped with internal passive crossover networks which enable a system of, for example,
TXD-121 and TXD-115 units to be configured together as a full-range system without the need for external electronic
crossovers or additional power amplifiers. The subwoofer’s internal crossover filters high frequency signals out of the
subwoofer cabinet to ensure a clean transition.
Amplifier considerations
TXD speaker enclosures should be driven by high quality power amplifiers designed for true professional use. Amplifiers
should be capable of delivering long term broadband power equal to the loudspeaker’s program power rating at the
stated nominal impedance. Always operate your power amplifiers at maximum gain for the best headroom and
signal/noise ratio, controlling the overall system volume from the mixing console. The use of under-powered amplifiers
must be avoided as heavily clipped signals can cause permanent loudspeaker damage.
RECOMMENDED AMPLIFIER POWER RATING
The amplifier’s rated r.m.s. continuous power output (20Hz – 20kHz, each channel)
should be equal to the loudspeaker’s program power handling at its nominal impedance.
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Quick Start Guide
TXD series
System Controllers
The Turbosound LMS-D24 is a high quality 2-in, 4-out digital crossover designed and pre-configured for use with TXD
loudspeakers. This enables you to assemble sound reinforcement systems ranging from a simple two-channel live
performance rig or monitor system up to a multi-zone nightclub or entertainment venue.
Passive systems without sub-bass
FROM MIXER
LR
EQ
L
R
TXD-121POWER AMPLIFIER
Connect the left and right mixer outputs, via a graphic equaliser if required, to one channel each of a stereo power
amplifier. Connect a TXD speaker to each amplifier channel with suitable speaker cable terminated with a Speakon NL4
connector. A second TXD speaker (shown with a dotted line) can be connected to each amplifier channel via the
loudspeaker’s parallel link connector up to a maximum of two per channel.
Passive systems with sub-bass
FROM MIXER
LR
EQ
L
R
TXD-115
TXD-151POWER AMPLIFIER
Low frequency enclosures can be used to extend system low frequency response, without the need for additional amplifier
channels or external electronic crossovers. A full range system consisting of, for example, TXD-151 and TXD-115
enclosures can be powered from a single stereo power amplifier as shown. Connect first to the bass cabinets and then link
out to the top cabinets via the parallel link connector.
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Quick Start Guide
TXD series
Using Passive Speakers with Subwoofers in Bi-amplified Mode
TXD series two-way loudspeakers can also be operated in bi-amplified mode together with any of the available subwoofer
enclosures. An external 2-in, 4-out crossover such as the LMS-D24 is required with a crossover frequency of 125Hz,
24dB/octave slope, Linkwitz-Riley. To operate TXD systems in bi-amplified mode, it is necessary to by-pass the internal
passive crossover in the bass cabinet. To do this, undo the four screws holding the pole mount socket in place, and firmly
pull the pole mount out of the cabinet together with the passive crossover selection wiring. In the case of the TXD-215 and
the TXD-218, remove the lower side pole mount. To by-pass the internal passive crossover, remove the yellow link wire
from the red and connect it to the black as shown in the diagram, and replace the pole mount in the cabinet.
Red
Yellow
Black
Red
Yellow
Black
Bi-amplified Systems
TXD-252 and TXD-15M loudspeakers can be operated in bi-amp mode, using two separate amplifiers and an external
electronic crossover such as the LMS-D24.
HF
FROM MIXER
LEFT RIGHT
EQ
LMS-D4
RIGHT
LF
POWER AMPLIFIERS
HF
TXD-252
LEFT
LF
TXD-252
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Quick Start Guide
WB-20
wall bracket
TXD series
Mounting and Fixing
TXD series cabinets are equipped with pole mount sockets to enable use with a range of speaker poles of different lengths.
TXD series cabinets can be rigged in permanent installations using optional M10 shoulder eyebolts coupled to the internal
rigging points provided on the top and back. Remove the appropriate M10 countersunk screws and replace them with M10
eyebolts, which must have a thread length of at least 18mm. Use the rear rigging point to angle the cabinet for optimum
room coverage.
Turbosound wall and ceiling brackets are available as options for installing TXD series cabinets. The PB-55 pole bracket
can be used to wall mount all types of cabinets fitted with a pole mount socket.
Model Wall Mount Ceiling Mount Pole Mount Eyebolts
TXD-081 WB-20 CB-55 PB-55 M10
TXD-121 WB-20 CB-55 PB-55 M10
TXD-151 WB-20 CB-55 PB-55 M10
M10 eyebolts
PB-55 pole bracket
Spares and Accessories
CD-111 / RD-111 Compression driver / diaphragm for TXD-081, TXD-121, TXD-12M, TXD-151
CD-212 / RD-212 Compression driver / diaphragm for TXD-15M, TXD-252
LS-1219 / RC-1219 12” low frequency loudspeaker / recone kit for TXD-121, TXD-12M
LS-1521 / RC-1521 15” low frequency loudspeaker / recone kit for TXD-151, TXD-15M
LS-1522 / RC-1522 15” low frequency loudspeaker / recone kit for TXD-252
LS-1523 / RC-1523 15” low frequency loudspeaker / recone kit for TXD-115, TXD-215
LS-1811 / RC-1811 18” low frequency loudspeaker / recone kit for TXD-118, TXD-218
LS-8010 8” low frequency loudspeaker for TXD-081
Turbosound Ltd 2003, Star Road West Sussex RH13 8RY, UK
tel: +44(0)1403 711447 fax: +44(0)1403 710155 www.turbosound.com
version 1.3 10/08/05
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