Truffle
Extremely compact and easily concealable
aluminum alloy subwoofers
USER GUIDE
Truffle-KTR24 Truffle-KTR25 Truffle-KTR26
KTR24-KTR25-KT R26_uguide_1.0.0
Truffle
User Guide
Index
Unpacking 4
Setup 4
Installation 5
Connecting 6
Connecting the Amplifier 7
Loudspeakers in Parallel 7
Service 8
Cleaning 8
Mechanical drawings 8
Technical Specifications 11
1
Truffle
User Guide
IMPORTANT SAFETY INSTRUCTIONS
Read these instructions - Keep these instructions
Heed all warnings
Warning. Failure to follow these safety instructions
could result in fire, shock or other injury or damage to
the device or other property.
Installation and commissioning may only be carried out
by qualified and authorized personnel.
Switch-off the mains power supply before carr ying out
any connection or maintenance operations.
Symbols
K-array declares that this device is in compliance
with applicable CE standards and regulations. Before
putting the device into operation, please obser ve the
respective country-specific regulations!
WEEE
Please dispose of this product at the end of its
operational lifetime by bringing it to your local collection
point or recycling center for such equipment.
This symbol alerts the user to the presence of
recommendations about the product ’s use and
maintenance.
The lighting flash with arrowhead symbol within an
equilateral triangle is intended to aler t the user to the
presence of uninsulated, dangerous voltage within
the product enclosure that may be of magnitude to
constitute a risk of electrical shock.
This device complies with Restriction of Hazardous
Substances Directive.
General heed and warnings
• Read these instructions.
• Keep this instructions.
• Heed all warnings.
• Follow all instructions.
• Do not use this apparatus near water.
• Clean only with dry cloth.
• Do not block any ventilation openings. Install in accordance with the
manufacturer’s instructions.
• Do not install near any heat sources such as radiators, heat registers,
stoves, or other apparatus (including amplifiers) that produce heat.
• Only use attachments/accessories specified by the manufacturer.
• Use only with the cart, stand, tripod, bracket, or table
specified by the manufacturer, or sold with the apparatus.
When a cart is used, use caution when moving the cart /
apparatus combination to avoid injury from tip-over.
• Unplug this apparatus during lightning storms or when
unused for long periods of time.
• This loudspeaker system is intended for professional use.
• Beware of sound levels. Do not stay within close proximit y of
loudspeakers in operation. Loudspeaker systems are capable
of producing ver y high sound pressure levels (SPL) which can
instantaneously lead to permanent hearing damage. Hearing damage
can also occur at moderate level with prolonged exposure to sound.
Check the applicable laws and regulations relating to ma ximum sound
levels and exposure times.
• Before connecting the loudspeakers to other devices, turn off the power
for all devices.
• Before turning the power on or off for all devices, set all volume levels to
minimum.
• Use only speaker cables for connecting speakers to the speaker
terminals.
• Be sure to observe the amplifier’s rated load impedance particularly
when connecting speakers in parallel. Connecting an impedance load
outside the amplifier’s rated range can damage the devices.
• Refer all servicing to qualified service personnel. Ser vicing is required
when the apparatus has been damaged in any way, such as powersupply cord or plug is damaged, liquid has been spilled or objects have
fallen into the apparatus, the apparatus has been exposed to rain or
moisture, does not operate normally, or has been dropped.
• K-array will not shoulder any responsibilities for products modified
without prior authorization.
• K-array cannot be held responsible for damage caused by improper use
of the loudspeakers.
2
Truffle
User Guide
Thank you for choosing this K-array product!
To ensure proper operation, please carefully read this
reference manual and safety instruction before using the
product. After reading this manual, be sure to keep it for
future reference.
Should you have any questions about your new
device please contact K-array customer service at
support@k-array.com or contact the official K-array distributor
in your country.
The Truffle is an easily concealable subwoofer line made
from aluminum alloy. Composed of the Truffle-KTR24,
Truffle-KTR25 and the Truffle-KTR26, the diminutive low
frequency speaker line is comprised of an active transducer
and a passive speaker on each end of a compact cyndrillical
box, rendering the subwoofer a perfect omnidirectional lowend source.
Because of longer wavelengths, low-end frequencies are
able to pass through most obsticles which is precisely why
the Truffle was designed to remain hidden from view.
It completes the Azimut systems as the bass component to
offer a complete, plug and play audio solution.
3
Truffle
User Guide
Unpacking
Each K-array product is built to the highest standard and
thoroughly inspected before leaving the factory. Upon arrival,
carefully inspect the shipping carton. If you find any damage,
immediately notify the shipping company. Check that the
following parts are supplied within the package:
A. 1x Truffle loudspeaker
B. 1x Phoenix MSTB 2,5/ 2-ST-5,08 BK flying connectors
C. 2x Surface mount brackets
D. 4x M4x10 mm
E. 4x M4 Nuts
A
D
Setup
Truffle subwoofers are designed to be easily concealed
above or underneath furniture. Ensure that enough space
has been left around the subwoofer to allow the sound to
propagate properly.
We suggest the following configurations:
150 mm
(6 in)
150 mm
(6 in)
Suggested minimum
free space
B C
The accessories including in the packaging provide easy
installation in fixed setup.
4
E
Truffle
User Guide
Installation
The four adjustable rubber feet steady the Truffle subwoofer
on any flat horizontal surface.
In case of installations on vertical or tilted surfaces, or to
permanently secure the loudspeaker to a surface, a pair of
dedicated brackets is provided.
The following procedure shows how to assemble the brackets
on the Truffle-KTR25. The procedure is the same for the
KTR24 and KTR26.
1. Turn the Truffle upside-down.
3. Slot the four M4 nuts on the metal profiles.
4. Use the M4x10 mm screws to fasten the surface mount
brackets on both sides of the subwoofer.
Tor x T20
2. The rubber feet may be
removed or left in place
without affecting the
assembly. In order to
remove a rubber foot,
unscrew and remove the
nut from the metal profile.
5
Truffle
User Guide
Connecting
The Truffle subwoofer features an euroblock 2 pin Phoenix
inlet for easy connectivity and link.
Caution must be taken when connecting the loudspeaker
cable to the flying connector to match the signal polarity:
+ HOT red wire
– COLD black/blue wire
If a label with signal polarity is not present on the flying
connector, please refer to the label on the loudspeaker
rear panel.
For a cable run of up to 5 m (16.4ft) use a wire gauge of
0,75 mm2 (18 AWG) at least.
For longer cable runs a wider gauge is recommended.
Hole for assembly on KTR24
12 mm (0.5 in)
6 mm (0.25 in)
Hole for assembly on KTR25
Hole for assembly on KTR26
Hole for surface mounting
6
Truffle
User Guide
Connecting the Amplifier
K-array’s Kommander line of amplifiers featuring built-in
DSP will operate the Truffle subwoofers at their optimized
performance only with the proper preset.
Load the device preset according to the connected
loudspeaker before applying any signal to the unit.
Set the dedicated
Truffle-KTR24 / Truffle-KTR25 / Truffle-KTR26
DEVICE PRESE T on the amplifier DSP
BEFORE applying any signal to the loudspeaker
Before connecting the loudspeaker cable to the amplifier:
• ensure the loudspeaker impedance matches the
amplifier channel rated loading impedance, especially
when connecting multiple loudspeakers in parallel (see
next paragraph);
• ensure that the amplifier is switched off.
When connecting the wires to a SpeakOn NL4 connector,
screw the HOT+ wire to the terminal 1+ or 2+ and the
COLD– wire to the terminal 1- or 2-.
Loudspeakers in Parallel
By connecting the loudspeakers in parallel it is possible to
drive many loudspeakers with the same audio signal by
means of a single amplifier output channel.
The parallel connection lowers the total load impedance.
Caution must be taken to maintain the load impedance of
the paralleled loudspeakers above the amplifier’s minimum
loading impedance.
Use the table below to match the number of loudspeakers at
the specified impedance that can be connected to K-array’s
Kommander amplifiers.
KA02 K A14 K A 24 KA84
Truffle-KTR24 2* 1 1 –
Truffle-KTR25 2* 1 1 –
Truffle-KTR26 1 – – –
* Parallel Bridge Tied Load (PBTL) configuration. Refer to Kommander-KA02
or Azimut user manuals for details.
25 mm (1 in)
12 mm (0.5 in)
1-
2+
1+
1-
1+
2+
2-
2-
7
Truffle
User Guide
Service
To obtain service:
1. Please have the serial number(s) of the unit(s) available
for reference.
2. Contact the official K-array distributor in your country:
find the Distributors and Dealers list on K-array website.
Please describe the problem clearly and completely to
the Customer Service.
3. You will be contacted back for online servicing.
4. If the problem cannot be resolved over the phone,
you may be required to send the unit in for service. In
this instance, you will be provided with an RA (Return
Authorization) number which should be included on all
shipping documents and correspondence regarding
the repair. Shipping charges are the responsibility of the
purchaser.
Any attempt to modify or replace components of the device
will invalidate your warranty. Service must be performed by
an authorized K-array service center.
Cleaning
Use only a soft, dry cloth to clean the housing. Do not use
any solvents, chemicals, or cleaning solutions containing
alcohol, ammonia, or abrasives. Do not use any sprays near
the product or allow liquids to spill into any openings.
Mechanical drawings
Truf f l e - K TR24
122 mm
[4.8 in]
117 mm
199 mm
[4.6 in]
[7.8 in]
8
Truf f l e - K TR25 Truf f l e - K TR26
[5.8 in]
147 mm
176 mm
Truffle
User Guide
[6.9 in]
152 mm
182 mm
[6 in]
[10.2 in]
258 mm
[7.1 in]
[13.4 in]
341 mm
9
Truffle
User Guide
Bracket
60,00mm
10,00mm
[
0,4in
55,00mm
[
2,2in
]
]
2,4in
[
48,00mm
[1,9in]
55,00mm
[
2,2in
]
62,00mm
[
2,4in
]
75,00mm
[2,9in]
]
[0,3in]
8,00mm
5,00mm
[0,2in]
10
Truffle
User Guide
Technical Specifications
Truffle-KTR24 Truffle-KTR25 Truffle-KTR26
Typ e Passive subwoofer Passive subwoofer Passive subwoofer
Rated Power 60 W 80 W 100 W
Frequency Response
Maximum SPL
Coverage Omni Omni Omni
Transducers 4" woofer + passive radiator 5.25" woofer + passive radiator 6.5" woofer + passive radiator
Colors Black
Finishes Powder Matte
Material Aluminum
Dimensions
(WxHxD)
Weight 1,5 kg (3.31 lb) 2,5 kg (5.51 lb) 3,5 kg (7.72 lb)
IP Rating IP54
Impedance 4 Ω 4 Ω 2 Ω
1
With dedicated preset
2
Maximum SPL is calculated using a signal with crest factor 4 (12dB) measured at 1 m.
1
45 Hz – 150 Hz (-6 dB) 45 Hz – 150 Hz (-6 dB) 45 Hz – 150 Hz (-6 dB)
2
112 dB (peak) 115 dB (peak) 120 dB (peak)
122 x 117 x 199 mm
(4.8 x 4.6 x 7.8 in)
152 x 147 x 258 mm
(6.0 x 5.8 x 10.2 in)
182 x 176 x 341 mm
(7.1 x 6.9 x 13.4 in)
11
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Designed and Made in Italy
K-ARR AY sur l
Via P. Romagnoli 17 | 50038 Scarperia e San Piero - Firenze - Italy
ph +39 055 84 87 222 | info@k-array.com
www.k-array.com
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