Laney
Concept
Concept Loudspeakers
Applications
Laney
Concept
Concept Loudspeakers
Applications
1 Cover
2 Contents
3 Introduction + Impedance
4 Hints + Safety
5 Vocal PA
6 Music + Vocal Pa
7 Full Range Sound Reinforcement
8 Full Range Sound Reinforcement
9 Specifications and Range Information
Laney
Concept Application Notes
Concept
Myths and Reality of Sound Systems
Introduction
Within this application note you will 4 sound systems which fullfill most of all typical system requirements.
The systems which are covered :-
1) Vocal PA
2) Full Range + Vocal PA
3) Full Range Sound Reinforcement
4) Full Range Sound Reinforcement
Before these systems are discussed its worth discussing myths and realities of sound systems.
Speaker Impedance - Do I buy 4 ohm or 8 ohm Enclosures ?
At some point while shopping around to buy your sound system you will be told you need 4 ohm cabinets
Data
because its claimed they are louder .This may be due to what your supplier has in stock or its what a
particular manufacturer recommends - but what is actually true ?
You could look for a mathematical answer it will say change your 8 ohm loudspeaker to a 4 ohm loudspeaker
you’ll get double the power. False in practice most of amplifiers have conventional power supplies ,when
you drive an amp which will do 70W @ 8 ohms it will do 100W @ 4 ohms not double the power after all.
Even so I hear you cry that’s still a whole 30W more output from my loudspeaker. Lets have a look at a few
figures
Sound intensity is a logarithmic law so in fact to get twice as loud as your 70W you will need about a 700W
amplifier - by going to a 4 ohm cabinet and dissipating an extra 30W in the driver you won’t get 30% more
sound level you’ll probably only end up with 10-15% if you are lucky.
What you will do though is increase the working temperature of the voice coil so any fractional increase in
output level you did get would be taken away due to thermal compression which could be as much as a 25%
reduction in sound level..
So by using an 8 ohm enclosure the following happens :
1)Reliability Improved - the working temperature of the Loudspeakers voice coil is decreased
2)Reduced thermal compression - 50% less than in a similar 4 ohm unit
3)A Flexible sound System - you can parallel 2 loudspeakers together
4)If you run your amps at 8 ohms they run cooler - good for long term reliability.
So any marginal increase output level achieved by going to 4 ohm cabinets will instantly be taken away from
you in thermal compression and reliability.
Laney
Concept Application Notes
Concept
Concept Specification
Model Power Rating
(W)
Frequency
Response
Sensitivity
dB/W @
1m
Impedance
Available
Recommended
Power
amplifier*
Dimensions
H*W *D
Cabinets
CT10 80 100 20K 97 8 120 470*310*330
CT12 100 85 18K 98 8 200 545*384*397
CT15 150 65 18K 98 8 220 637*444*463
CT815 250 65 18K 98 8 350 715*444*463
Powered Cabinets
CPC10 65 100 20K 99 8 470*310*330
CPC12 120 85 - 18K 98 8 545*384*397
CPC15 150 65 - 18K 98 8 637*444*463
Low Frequency
Enclosures
Data
CS115
CS215
CS118
CCX Cabinets
CTX10
200
700
350
200
60 800
45 - 450
45 - 450
90 20K
98
102
102
97
8
4
8
300
650
300
635*463*440
870*620*440
870*620*440
470*310*330
CTX12 350 65 17K 98 8 630 597*384*397
CTX15 350 60 17K 102 8 630 685*444*463
*Recommended power amps rating into 4 ohms
CT Range
The CT full range loudspeakers all feature custom bass drivers in reflex enclosures , two ¼ inch Jack
connectors and piezo high frequency drivers which are extremely reliable .
The CT satisfies most sound system requirements where cost effective sound systems are required
CPC Range
The CPC Range consists of 3 loudspeakers which are powered versions of the CT10 ,CT12 and CT15.
CTX Range
The CTX full range loudspeakers feature high power custom drivers in reflex enclosures .The CTX12 and
CTX15 use 1 inch compression drivers on a horn with a 90 * 40 dispersion pattern.
The CTX range is designed where high quality high sound levels are required , eg band , club and bars.
CS Range
The CS Bass Loudspeaker features high power custom drivers in reflex enclosures.
The CS range is designed to complement the CT , CPC and CTX enclosures where extended low frequency
response is required, such as with dance music and accurate reproduction of drums.
Laney
Concept Application Notes
Concept
Myths and Reality of Sound Systems
How much Power do you really need ?
Application Hints
1.) Reduce any subsonic signals to your loudspeakers it will increase the life of you drivers by reducing the driver
power dissipation and cone excursion but also improve low frequency definition. You can achieve this by
switching in any sub-sonic filters that operate at 30Hz and below or reducing these frequencies on a graphic
equaliser.
2.)Avoid feedback - when feedback occurs it builds up until it is at the maximum output level the sound system is
able to produce - even if it involves the sound system clipping. This is potentially damaging to any loudspeaker
and thus should be avoided.
i)make sure sound from the speakers , cannot be picked up by microphones .
(speakers are best in front and facing away of the band).
ii)Only keep microphones open which are needed
iii)Try to cut rather than boost when using any Eq.
Data iv)If feedback does occur use the graphic Eq or feedback eliminator to stop it.
v)Turntables are particularly prone to low frequency feedback is wise to isolate them mechanically from
any low frequency vibration.
3.) In venues which have a particularly lively/reverberant sound. It is best to use a distributed loudspeaker
system as this will improve intelligibility/definition trying to compensate with more volume will just excite the
reveberant space even more.
Safety Information
1.) High sound pressure levels from loudspeakers can cause permanent and temporary hearing damage. Take
care when setting maximum sound levels.
2.)The CT and CTX enclosures are designed for stand/pole mounting via the top hat, in the base of the
loudspeaker. The top hat is designed to suit a 35mm pole.
The loudspeakers do not incorporate any facilities for flying or hanging. Do not use the handles for this purpose.
3.)Care should still be taken when lifting, otherwise back injuries may result.
If you can, get some one to help you when lifting the loudspeaker or remember to bend your knees when you pick
up and put down the cabinet.
4.) When you position your loudspeakers remember to position them to minimize the risk of people falling over
them (particularly the stands).Also remember to secure the loudspeaker cable to minimise any risk of tripping
people.
Laney
Concept Application Notes
Concept
Vocal P.A.
CPC10 + CT10
Description Application : General Purpose Vocal PA
Medium Level Music
This is a medium level music PA.It is built around a
CPC10 active enclosure and a CT10 enclosure. Typical User : Schools - fixed install or
general mobile use
This system is the ideal solution where a vocal PA is Places of Worship
required where it needs to be simple to operate and Small Aerobic / Fitness suites
Data
lightweight.
Vocal PA’s do not need the large power amplifiers
associated with high level music systems so if you do
not really need to club/band sound levels this system
Output Power: 65W r.m.s.
Equipment
93W Peak
Required: 1 off LANEY CPC10
will meet your requirements. 1 off LANEY CT10
2 off Speaker Stands
The CPC10 is a version of CT10 with a 65W power 1 off Jack to Jack Speaker
amplifier and mixer built in. cable
The CPC10 has 2 input channels 1 off Microphone
1)Phono/Jack input - for CD/tape/Keyboard type 1 off Microphone cable
inputs 1off CD/tape/minidisc as
2)Mic/line input - for microphones or CD/ tape/ required
Keyboard type inputs.
Power Requirement: 130W
0.56A
Laney
Concept Application Notes
Concept
Full Range + Vocal P.A.
CPC10 + CPC10
CS115 + CS115
Data
Description Application : General Purpose Vocal PA
Medium Level Music
This is a vocal / medium level music PA with bass
extension which belies its low power rating Typical User : Bands - Vocal / Keyboard PA
Mobile discos <200
The additional bass extension provided by the CS115 Schools - fixed install or
enclosure allows the system to provide high level general mobile use
reinforcement of pre-recorded/live material in small Aerobic / Fitness suites
venues . This systems performance really needs to be Places of Worship
auditioned to realise the full benefits of the additional
low frequencies. These low octaves are where much of Output Power: 130W r.m.s.
the emotion and feeling exist within music. This makes 186W Peak
the system ideal for DJ’s / vocal + keyboard
reinforcement for bands. Equipment Required: 2 off LANEY CPC10
2 off LANEY CS115
The CS115 enclosures are connected to the `extension 2 off Pole Stands
speaker socket’ on the CPC10. 1 off Jack to Jack Speaker
cable
The previous two systems can easily be changed to An external mixer may be
use a CPC12 (120W) or CPC15(150W) should you used to drive into the CPC10
need louder systems which may be typical band/ DJ ‘s. line inputs - or the internal
mixer could be used as
described in the previous
application note
Power Requirement: 260W
1.12A
Laney
Concept Application Notes
Concept
Full Range Sound Reinforcement
CT15 + CT15
CS115 + CS115
Data
Description Application : Full range Sound
Reinforcement
This is a system designed for primary reinforcement
system for bars , DJ’s ,bands. Typical User : Band Sound systems
The simplest operation of this system is by linking the Mobile discos
CT15 and CS115 socket together using the sockets on Clubs / Bars
the rear panel. Due to the extended frequency Aerobic / Fitness suites
response of the CS115 it can operated without a Places of Worship
crossover without sonic compromise.
Recommended 1 off stereo 120 - 630W per
If Bi-amping is being considered where a separate Power Amplifier: channel amplifier
amplifier would be used for CS115 and CT15
performance improvements can be made. The Equipment 2 off LANEY CT15
crossover or low pass filtering should be set to Required: 2 off LANEY CS115
attenuate frequencies above 300Hzl. It is advised 2 off Pole Stands
however not to set the CT15 low frequency roll off to 2 off Speaker cable (long) -
300Hz otherwise you will not realise the low frequency Jack at speaker end
extension which exists in the CT15, in simple terms 2 off Speaker cable (short) -
there is no point rolling of the bass to 15 inch drivers Jack to Jack
they reproduce it very well ! Experience shows that in
many instances running the CT15 full range with low Power Requirement : <2000W
frequency roll off below 30Hz to be give best results. <8A
You can achieve a simple low pass filter by smoothly
rolling of the frequencies above 300Hz on a graphic
equaliser .
Laney
Concept Application Notes
Concept
Full Range Sound Reinforcement
CTX12 + CTX12
CS215 + CS215
or
CS118 + CS118
Data
Description Application : Full range Sound
Reinforcement
This is a system designed for primary reinforcement
system in bars , in clubs ,bands. Typical User : Band Sound systems
Mobile discos
The move from the CT range to the CTX range sees Clubs / Bars
the use of a 1 inch compression driver for mid/ high Aerobic / Fitness suites
frequencies, this makes mid and treble frequencies Places of Worship
sound purer and project better. Audition this you can
hear the difference , you don’t need golden ears ! Recommended 2 off 120 - 630W per channel
Power Amplifier: amplifier
The CTX12 enclosure is an competent full range
enclosure its bass extension is fine for most Equipment 2 off LANEY CTX12
application however in large venues and/or events Required: 2 off LANEY CS215 or CS118
requiring high sound levels the addition of a CS bass 2 off Pole Stands
enclosure is recommended. 4 off Speaker cable (long)
The simplest operation of this system is by linking the The crossover or low pass filtering should be set to
CTX15 and CS118 socket together using the sockets attenuate frequencies above 250Hz. It is advised
on the rear panel. Due to the extended frequency however not to set the CTX12 low frequency roll off to
response of the CS118 it can operated without a 300Hz otherwise you will not realise the low frequency
crossover without sonic compromise. The CS215 does extension which exists in the CTX12, in simple terms
benefit from the use of a crossover - and it does need a there is no point rolling of the bass to 12 inch drivers
separate amplifier due to its 4 ohm impedance. they reproduce it very well ! Experience shows that in
many instances running the CTX12 with low frequency
If Bi-amping is being considered , where a seperate roll off below 60Hz gives best results.
amplifier would be used for CTX12 and CS enclosures
performance improvements can be made. You can achieve a simple low pass filter by smoothly
rolling of the frequencies above 250Hz on a graphic
equaliser .
