System Configuration & Oem Controllers - Tannoy Power Dual iQ 15 User Manual

12. System Configurations & OEM Controllers
Passive or Biamp?
The iQ 10/15 is supplied as standard for bi-amp operation, therefore there is no
internal passive crossover network between the LF & Mid/High units. The Bi-amp
controller parameters below must be adhered to for optimum performance.
An optional iQ 10/15 (tri-amp version) can be ordered.
A loudspeaker driven in Bi-amp mode offers a number of performance advantages,
such as increased system headroom. Audio program materiel is made up of many
different frequencies and harmonics. In music materiel, most of the energy is in the
low frequencies, with less in the highs. When both high and low frequencies are
present in a signal, the stronger low frequencies can use up amp power, leaving little
or no reserve for the highs, so they are more likely to cause the power amplifier to
clip. In a Biamp driven system, a smaller amp can handle high frequencies, LF amp
clipping is less of a factor, and less overall amplifier capacity is needed due to the
efficiency improvement in the absence of a passive crossover.
Bi-amp System Parameters (iQ 10/15)
Parameter
Gain
Delay*
Polarity
HPF
LPF
PEQ 1
PEQ 2
16
Unit/Name Low Section
(dB) +5
(ms) 0
Positive
Freq (Hz) 39.8
Slope (dB/oct) 24
Filter Shape Butterworth
Freq (Hz) 180
Slope (dB/oct) 24
Filter Shape Linkwitz Riley
Freq (Hz) 60.1
Level (dB) +4
Type Parametric
Q / Bandwidth 2 / 0.5
Freq (Hz) 141.3
Level (dB) -5
Type Parametric
Q / Bandwidth 2 / 0.5
Mid/High Section
0
0
Positive
180
24
Linkwitz Riley
Thru
NA
NA
2000
-4
Parametric
0.8 / 1.25