Power Selection; Equalisation; Dimensions - Tannoy i7 User Manual

6. Power Selection (i7T)
Determine the maximum power in watts needed at each speaker location. The i7
transformer can be tapped at 15W, 30W & 60W (left to right positions
respectively) via the rotary switch located on the rear of the loudspeaker cabinet. When
the relevant tappings have been selected add the individual wattages required at all
speakers and select an amplifier with a rating equal to or exceeding the total wattage
required. All of the transformer primaries should be connected in parallel to the output of
this amplifier. If for example, you select the 15-watt transformer tap, it means that at full
rated amplifier output the speaker will receive the full 15 watts. If the amplifier gain is
reduced each speaker will receive a proportional amount of power, maintaining the
overall system balance.
When calculating amplifier wattage requirements for a system, it is recommended that a
generous wattage safety margin (3dB of headroom) be left so that the system does not
have to operate continuously at its full rated output

7. Equalisation

The i7 loudspeaker is designed to need no equalisation or correction to
overcome system limitations. As a result, it will only need equalisation to compensate
for difficult acoustic environments.
Over equalisation can reduce system headroom, and introduce phase distortion
resulting in greater problems than cures. If equalisation is required then it should be
applied gently and smoothly.

8. Dimensions

572mm
1
(22 / ")
2
139mm
135mm
(5")
(5 1 / ")
2
155mm
(6")
i7