Amate Audio
KEY Series (Passive). Version 1.2
Sept16
14
KEY15W
KEY18W
Impedance
8
Sensitivity (1W/1m)
95 dB
97 dB
Frequency response
(-10dB)
38Hz-180Hz (with
external DSP)
34Hz-150Hz (with external DSP)
Program power
600W
1000W
Directivity
omnidirectional
omnidirectional
Components
LF
1 x 15” woofer (3” v.c.)
1 x 18” woofer (4” v.c)
Cabinet
Type
Bass-reflex
Height
600 mm
700 mm
Width
490 mm
550 mm
Depth
520 mm
605 mm
Weight (net)
27,1 Kg
39,9 Kg
Connectors
2 x Speakon (In/Link)
Material
Multilayer plywood, steel front grille with acoustic foam
Finish
Ecological water-base matt paint
5. POWER LOSSES (%) AND DAMPING FACTOR, RELATED TO WIRE LENGTH
AND SECTION
(*) Referred to an amplifier with a Damping Factor of 200:1.
Wire sections under
2.50 mm
2
are completely inadvisable.
For fixed installations with a 4-Ohm load, it is better to have one wire for each
speaker system. It is not advisable to bridge one cabinet to another.
Wire length
(m)
Section
(mm
2
)
Resistance
(Ohms)
Power losses
8Ohms 4Ohms 2Ohms
Damping losses(*)
8 Ohms 4 Ohms
1
0.75
0.042
0.53%
1.05%
2.10%
98
49
1.50
0.025
0.31%
0.63%
1.25%
123
62
2.50
0.013
0.16%
0.33%
0.65%
151
75
4.00
0.008
0.10%
0.20%
0.40%
167
83
5
0.75
0.210
2.63%
5.25%
10.5%
32
16
1.50
0.125
1.56%
3.13%
6.25%
48
24
2.50
0.065
0.81%
1.63%
3.25%
76
38
4.00
0.040
0.50%
1.00%
2.00%
100
50
10
0.75
0.420
5.25%
10.50%
21.00%
17
9
1.75
0.250
3.13%
6.25%
12.50%
28
14
2.50
0.130
1.63%
3.25%
6.50%
47
24
4.00
0.080
1.00%
2.00%
4.00%
67
33
20
0.75
0.840
10.50%
21.00%
42.00%
9
5
1.50
0.500
6.25%
12.50%
25.00%
15
7
2.50
0.260
3.25%
6.50%
13.00%
27
13
4.00
0.160
2.00%
4.00%
8.00%
40
20
50
0.75
2.100
26.25%
52.50%
---
4
2
1.50
1.250
15.63%
31.25%
62.50%
6
3
2.50
0.650
8.13%
16.25%
32.50%
12
6
4.00
0.400
5.00%
10.00%
20.00%
18
9