P R O L A - 1 5
A N D L A - 1 5 S U B ( P A S S I V E )
LA-15 Series full range system
AMP
Full range output from
amp to LA-15 input
Full range
signal from
audio mixer
Active
Crossover
HF
AMP
LF
AMP
LF
HF
Speakon™ Plug
Connection
Pin 1+ = + on
amp terminal
Pin 1- = - on
amp terminal
AMP
Full range output from
amp to LA-15SUB input
Full range
signal from
audio mixer
Speakon™ Plug
Connection
Pin 1+ = + on
amp terminal
Pin 1- = - on
amp terminal
Full range
signal from
audio mixer
Linked from LA-15SUB
parallel input to
LA-15 input.
system load of 4 ohms
LA-15 & LA-15SUB Series extended full range system
LA-15 & LA-15SUB Series extended full range system
with external active crossover
pre-filtered output from
active crossover to
(high) LA-15 input
pre-filtered output from
active crossover to
(low) LA-15SUB input
APPLICATION: The speaker system is a full range, high power handling,
high efficiency system designed for demanding professional applications
such as the reproduction and reinforcement of music, musical instrument,
vocal and spoken voice.
BI-AMPLIFICATION: Bi-amplification of these systems is possible after
simple modifications are performed on the internal crossover. A full
understanding of the theory and practice of bi-amplification is
recommended before attempting to operate any system in this mode.
Bi-amplification describes the practice of using separate amplifiers for each
of the drivers in a two-way system. Active crossovers, before the amplifier
band limit the signal frequencies assigned to each amp and speaker to
only those appropriate for each driver’s capabilities. Never bi-amp a
speaker without understanding the correct frequency range and power
level capability of the drivers, or severe damage can result to the driver that
is not covered by any warranty.
For Bi-amplified use follow these instructions and cautions.
Remove the protective grill and woofer. Inside the enclosure at the rear
can be seen the input connection plate and crossover board. Locate
Jumpers “XXX” and “YYY” and remove. Your speaker system is now set
up for bi-amp operation and will not operate in its original mode. Cable
wiring for bi-amplification uses Speakon™ connections 1+, 1- for low
frequencies, and 2+,2- for HF. Make sure of all connections before
operation.
SUB WOOFER OPERATION: Where significant extension of low
frequency output of your system is required, the addition of the LA-15 SUB
will provide well balanced, high output enhancement and power to the
overall system.
Passive mode:
In the standard passive mode, the power amplifier can be connected to the
LA –15 SUB with the LA-15 full range speakers series connected from the
input/output connector panel. (See drawing) Alternatively the sub models
can be connected directly to the amp as can the full range cabinets.
Active mode:
For high output and demanding applications the subs can be powered
directly and exclusively from their own amplifier. (See drawings, and
Bi-amp discussion note earlier.)
We recommend a crossover bandpass of:
Hi-pass: 30-35 Hz, minimum 12 dB per octave
Low pass: 80Hz, minimum 18 dB, ideally 24 dB per octave.
It is possible to operate subwoofers at higher low pass frequencies,
however system sound quality and integrity are improved by the use of
lower frequencies. Thus higher output levels can be used with human
voice and instrument fundamentals maintained at more natural balance.
If you have a variable low pass on your active crossover, we recommend
experimenting for the ideal frequency for your application. Take care to
re-adjust relative systems levels for any frequency changes made.
LA SERIES • TECHNICAL SPECIFICATION
MODEL
Type of speaker
HF drive unit
HF driver protection
Power Handling
Impedance
Sensitivity
SPL (peak)
Frequency
Response
Power Amplifier
Crossover point
Weight
Dispersion (H x V)
Input connector
Dimension (mm & ins)
W x H x D
LA-15
15” two way full range
1” Diaphragm dynamic
Protection lamp
250W continuous
500W Program
8
Ω
100dB
130dB
45Hz- 20kHz
NA
2.3kHz
23.75 kg / 52.3 lbs
60 x 40
2 x Speakon™ and
2 x 1/4” jack
480 x 700 x 380
18.9” x 27.6” x 15”
LA-15SUB
15” Sub
-
-
250W continuous
500W Program
8
Ω
98dB
128dB
30Hz- 150Hz
NA
150Hz
26.5kg / 58.4 lbs
NA
2 x Speakon™ and
2 x 1/4” jack
480 x 700 x 380
18.9” x 27.6” x 15”
Wharfedale International Limited, IAG
House, Sovereign Court, Ermine Business
Park, Huntingdon, Cambs, PE29 6XU
England
WHARFEDALE website : www.wharfedalepro.com
IAG Professional reserve the right to alter or improve
specifications without notice.
All rights reserved © 2001Wharfedale Pro
IAG Professional is a member of the
International Audio Group
