Tannoy VLS 15 - 5 Wiring and Connections; Connector Type; Low-Impedance Mode

6
VLS Series Operation Manual rev 1.1.0
5. Wiring and connections
5. Wiring and connections
5.1 Connector type
EachVLSSeriesloudspeakerisequippedwithapairofinternallyparalleledbarrierstripterminalsforconnection
totheamplier(ortootherloudspeakersina70/100Vsystemorseries/parallelconguration).Barrierstrips
acceptwireupto4mmsqCSA(AWG12).Barrierstrippolarityisasindicated.
5.2 Low-impedance mode
Ifconnectingdirectlytotheamplierinlow-impedancemode,connectthepositive(+)conductortoapositive
(+)barrierstripterminalandthenegative(-)conductortoanegative(-)terminal.Severalloudspeakersmay
beconnectedtooneamplieroutputinparallel,series,orseries/parallelcongurationsusingtheother
internallyparalleledbarrierstripconnector.Pleaserefertofollowingsectiononseries/parallelconguration
beforeconnecting.
Whenchoosingcabletype,itisimportanttoselectthecorrectcrosssectionalareainrelationtothecable
lengthandtheloadimpedance.Asmallcrosssectionalareawillincreasethecable’sseriesresistance,inducing
powerlossandresponsevariations(dampingfactor).Connectorswiredwith2.5sq.mm(12AWG)cablewill
be
satisfactoryundernormalconditions;withverylongcableruns,thewiresizeshouldbeincreased.Please
refertothefollowingtableforguidance:
Cable Run
(m)
C.S.A.of
each
conductor
(mm
2
)
AWG Cable
resistance
ohms
% Power
loss into
4 ohm load
dB loss into
4 ohm load
% Power
loss into
8 ohm load
dB loss into
4 ohm load
10 2.5
4
6
13
11
9
0.13
0.08
0.05
3.9
2.5
1.6
0.17
0.11
0.07
2.0
1.3
0.8
0.09
0.06
0.04
25 2.5
4
6
13
11
9
0.33
0.21
0.13
9.3
6.1
3.9
0.42
0.27
0.17
4.9
3.1
2.0
0.22
0.14
0.09
50 2.5
4
6
13
11
9
0.66
0.41
0.26
17.0
11.4
7.5
0.81
0.53
0.34
9.3
6.1
3.9
0.42
0.27
0.17
100 2.5
4
6
13
11
9
1.31
0.83
0.52
29.1
20.5
14.0
1.49
1.00
0.65
17.0
11.4
7.5
0.81
0.53
0.34
Amplier selection-Aswithallprofessionalloudspeakersystems,thepowerhandlingisafunctionofvoice
coilthermalcapacity.Careshouldbetakentoavoidoverdrivingtheamplierintoclipping.Damagetothe
loudspeakerwillbesustainediftheamplierisdrivenintoclippingforanyextendedperiodoftime.Headroom
ofatleast3dBshouldbeallowed.Whenevaluatinganamplier,itisimportanttotakeintoaccountits
behaviourunderlowimpedanceloadconditions.Aloudspeakersystemishighlyreactive,andwithtransient
signalsitcanrequiremorecurrentthanthenominalimpedancewouldindicate.Generallyahigherpower
amplierrunningfreeofdistortionwilldolessdamagetotheloudspeakerthanalowerpoweramplierthat