JBL C29av1 Manual

							
It is important  to understand that  just as the  propagation  of sound 
outdoors is effected by  its surroundings so is the  propagation  of sound 
indoors. Some  of these environmental  factors exist in both cases, 
such as  reflective  surfaces and absorbant materials, but there are a 
few  unique  effects that may  need to be considered.  The factors 
described on  this Daae  can cause  the behavior  of an outdoor  installa- 
tion to deviate  from tjhe 
Inverse Square Law.  Remember not all 
frequencies  of the  propagated  sound will be affected uniformly. JUNGLE 
l Humidity - Because water vapor  is lighter  than air, humid 
is less  dense than dry air and,  therefore absorbs less 
acoustical energy  than dry air particularly  at frequencies 
above  2kHz. To labour the  point, a speaker mounted  on a 
tree  in a jungle will  project high frequency sound  further than 
the  same  speaker mounted on a cactus  in the desert (see 
diags. 
5 & 6). 
Painting  the Speakers - 
The  polystyrene speaker enclosures  of the  Controls 23, 
Control@  25, 
& Control@  28 can be painted to  match almost 
any  decor.  The vinyl skin  of the Controls SB-2 subwoofer  can 
also be  painted. 
-AAA * A 
l Remove the  grilles. Mask the  woofers, tweeters, & ports on  
the front, and  the wire terminals on  the back, being careful 
that  no tape comes in direct  contact with the drivers. 
l Clean the enclosures with a  light solvent  such as  mineral 
spirits  by rubbing the  components with a lightly dampened 
cloth.  Do not,  however, use  abrasives such  as sandpaper  or 
steel wool on the enclosures. Nor  should you use  gasoline 
kerosene, acetone, 
MEK, paint thinner,  harsh detergents o 
other chemicals.  Use of these cleaners  may result in perm 
nent damage to  the enclosures. 
After  cleaning,  apply two  or more thin coats  of either  latex or 
oil-based paints.  Latex paints  will adhere better  if an oil- 
based primer is  used first. Application  can be by rolling, 
brushing,  or spraying. 
The  grilles  require  masking  of the  logo  plug, then  spray 
painting.  If the  grill  is rolled  or brush  painted,  the mesh  may 
become  clogged with paint, and poor  sound quality may 
result. 
l The InvisiBalFM mount may  also be painted,  but because  it                             
						

							
RODUCT CARE MAINTENANCE 
A A Your Control Contractor  system has been designed  and manufactured  for durability  and reliable  service. As with  any fine 
product, proper maintenance and  care will extend  the life of your system. 
You  can expect your system components to  perform indefinitely  if you  use  them within their  stated limits  for power handling, 
and  see that they  are not abused. 
Always protect  the loudspeakers  from over-excursion caused  by strong subsonic signals (signals  below 
30Hz). If your 
amplifier has a  low cut or high pass  switch, engage  it. 
Please  note that although  the C23,  C25 and C28  are designed  to be  weather resistant they are  NOT WEATHERPROOF. 
Insect screens have been  included in the design of the low frequency vents.  It may be wise to  periodically  check and clear 
AA  A any debris collected, to ensure proper operation  of the vent. 
is  not unheard  of for rodents  to eat  and  destroy  foam. It is recommended that  the foam surrounding  the SB-2 subwoofer 
osure  be treated with a rodent repellent, especially  in an  installation that  may be subject to  the occasional  rodent 
ation. 
JBL  LIMITED  WARRANTY 
Control Contractor products  are designed and backed  by JBL,  the world leader  in sound reinforcement.  For complete  JBL 
warranty information within  the United States please refer to  the warranty  card enclosed with your  Control Contractor 
product.  In other areas  of the  world  please  contact your  local JBL distributor.           
						

							
If none  of the suggestions  below solve your problem, contact  your nearest JBL service center  or JBL distributor. 
Problem  Possible 
Causekl 
 
Action 
1. No  Output. 
Speaker 
Cable(s) Replace the 
cable(s) connecting  the loudspeaker system 
and  amplifier. 
2. Questionable  or 
intermittent output 
such as  crackling. 
3. Constant noise  such as 
buzzing, hissing,  or 
the  humming sound.  Amplifier 
A poor 
connection 
A faulty 
electronic 
device in the 
signal chain 
Poor  system 
grounding 
4. Poor low  frequency  Out-of-Polarity 
output.  Hookup 
between multiple 
speakers  Make sure 
the amplifier  channel is being fed an input 
signal (preferably  via a signal  input indicator  on th 
amp). 
Check that the amplifier channels volume  control is 
 turned up. 
Connect  the speaker  and cable  which had  no output 
another amplifier channel, making sure  an input sign 
fed to  the new  amp  channel.  If you  then  get output,  th 
problem  was the amplifier  channel. If not, then  the 
problem  may be in the  cable or speaker. 
Check  all cabling  for proper connector contact since a 
bad  connection can result  in intermittent contact  or 
dramatically increased resistance which,  in turn,  can 
, 
cause reduced output  or noises  unrelated  to the  signal. 
Since loudspeakers cannot generate  these sounds b 
themselves,  you may  have a  faulty electronic device 
the  signal chain. 
a Check  and correct  the system grounding,  as required. 
When two  speakers are  hooked up out-of-polarity  (out 
of-phase),  the low frequencies cancel  each other out. 
Try  reversing the polarity  of one of  the speakers  eithe 
by  turning around a  dual-banana plug at the  amplifier 
by  reversing  the tiplsleeve leads on the  jack. Whicheve           
						

							
CONTROL@ 23 
The most compact  of the  Control Contractor  Series speakers, the  Control 23 is ideal  for  limited 
space  environments.  Despite its 188 
x 138 x 108mm  (7 5 x 5 5 x  4.3in) dimensions, this 50W 
two-way  system  with 87dB sensitivity delivers crisp, articulate sonic quality from  225Hz to 2OkHz 
with  no discernable  phase distortion.  Pairing  a 3 
5 woofer with a horn-loaded titanium-coated 
tweeter,  the Control 23  is housed  in a black  or white HlPS  (high impact polystyrene) enclosure.  For 
venues  such as restaurants,  bars and retail shops,  the Control  23 offers impressive sound 
pressure 
- and value - in  an  ultra-compact  package. Accessories  include the hvisiBalPM Tool, a 
4mm  hex wrench.  Frequency 
Range: 
Power  Capacity: 
&flsf~ity:  87dB 1 W,  lm 
Nominal  lmpedam:  8R 
Crossover  Frequency:  3.5kHz 
Enclosure  Material:  HIPS (hgh impact  polystyrene) 
Termination:  Spring clips 
(adapted to accept dual banana  plugs) 
Dimensions  (HxWxD):  188 x 138  x 108mm 
(7.5  x 5.5  x 4.3in) 
Net  WeigM  (each):  1.8kg (4 Ibs) 
Shipping  Weight (pair):  4.1 kg (9  Ibs) 
Environmentat  Conformsto Mil Std.  202F.  Method  101D. 
Frequency  Range: 
Power  Capacity: 
Sensitivrty: 
Nominal Impedance: 
Crossover  Frequency: 
Enclosure  Material: 
Termination:  Spring clips 
(adapted to 
Dimensions  (HxWxD):  150Hz 
- 2OkHz 
(23dB) 
150  Watts  Continuous Program 
88dBIW,lm 
8R 
3.OkHz  HlPS  (high impact  polystyrene) 
accept dual banana  plugs) 
231  x183x140mm 
(9.5 x 7.3  x 5.6in) 
2.3kg  (5 Ibs) 
5kg 
(H Ibs) 
Conforms to Mil  Std. 2MF, Method 
CONTROL@ 25 
In mid-range  size, power and  performance, the two-way Control 25 incorporates  a 5.25 low 
frequency  loudspeaker  with a horn loaded  314 titanium-coated  tweeter and 150W  power 
capacity  Its 231 
x 183  x l40mm  (9.5  x 7.3 x 5.6in)  size and broad performance curve  make 
it  a  logical choice  lor sound reinforcement  in moderately  large retail venues, or  for multiple- 
distribution  requirements. With  a frequency  response range of 150Hz 
- 20kHz  and 88dB 
sensitivity,  it provides superior dynamic performance and 
a smooth roll-oft  down to  150Hz It is 
available with  a pre-installed  70Vl100V autoformer for line distribution  systems. 
Accessories  include the 
hvisiBalP Tool, a 6mm  hex wrench. 
101D. 
Net Weight (each): 
Shipping  Weight (pair): 
Environment4 
CONTROL@ 28 
The  Control 28 offers  the highest  power, performance, bandwidth  and sensitivity 
available  in a full-range Control Contractor  Series speaker At 175W,  the two-way  Control 
28 incorporates  an 8 low  frequency  transducer  and 1 titanium-coated  tweeter for vivid 
sound reproduction and  clarityfrom 100Hz to 2OkHz,  with 92db  sensitivity. Its  15 HlPS 
(high  impact polystyrene) enclosure ideally  balances mass and structural acoustics, and 
delivers exceptionally clean projection  in the  largest  coverage  environments.  For multiple 
speaker systems,  it is  available with  a factory-installed  70Vl100V autoformer for  line 
distribution  systems.  Accessories include the 
hvisiBalPM Tool, a 6mm hex wrench.  Frequency 
Range: 
Power  Capacity: 
Sensitivity: Nominal Impedance: 
Crossover  Frequency: 
Enclosure  Material: 
Terminatim:  Spring clips 
(adapted to 
Dimensions  (HxWxD): 
Net  Weight (each): 
Shipping  Weight (pair): 
Environmental:  92dB 
IW, Im 8n 2.8kHz 
HlPS (high  impact polystyrene) 
accept dual banana  plugs) 
375x  275x 21 5mm 
(15  x 11x  8.5in) 
5.5kg  (12 Ibs) 
11  kg 
(25 1s) 
Confonnsto  Mil  Std. 2MF, Method 101D. 
CONTROL@ SB-2 
The Control  SB-2 slot loading  vented bandpass  subwoofer,  with a dual voice-coil  10 bass transducer,  has been  specially tuned 
to complement all  full-range Control Contractor  Series systems. The SB-2  features a  unique concept in passive attenuation by  use of the 
Load Baffle,  a special geometric combination  of rigid  and pliable materials. It  has stereo 
8 ohm inputs with full bandwidth satellite outputs  that 
employ spring terminal connectors  that accept dual banana jacks.  Mass and structural integrity  are balanced  for a distortion-free low  end in 
575  x 375 
x 288  mm (15 x 23 x  11.5 in)  black vinyl-wrapped wooden  trapezoidal enclosures. 
The  MTC-2H  series mountng  k~t allows two Control  speakers to be  Allows up 
to three Control speakers to  be wall-mounted, 
horizontally wall-mounted with splay  angles of 120. Ganging  three MTC-2H 
brackets  forms a 360  array  suspension mount  of up  to six  speakers.  unique 
and patent-pending  In~isiball.~~ 
When  vertically mounted,  speakers can be attached  end-to-end in  a tight  attractive 
ver  larger vertical  planes. 
H A Harman International Company 
0 1996 JBL  PROFESSIONAL, 8500 BALBOA BLVD. NORTHRIDGE  CA 91 329