DPA Series — DPA80/DPA100 Operating Instructions
Page 71
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Amplifier Outputs’ Program Limiter Lookup Table
Note that the setting of the auxiliary outputs’ limiters need to be referenced to the external
amplifier’s gain for correct operation. A separate lookup table and explanation is given
overleaf.
Consider the table below.
dB Limit
Power 8
Power 4
Power 2.7
Power 2
48
4721
9442
Bridge Mode Operation
Not Possible
47
3753
7506
46
2982
5964
45
2370
4741
44
1884
3768
43
1496
2993
42 1189 2377 3396 4755
41 944 1888 2698 3777
40 750 1500 2143 3000
39 596 1192 1702 2383
38 473 946 1352 1893
37 376 752 1074 1504
36 299 598 853 1194
35 237 474 678 949
34 188 377 538 754
33 150 299 428 599
32 119 238 340 475
31 94 189 270 378
30 75 150 214 300
29 60 120 178 240
28 47 94 139 188
27 38 76 113 152
26 30 60 89 120
25 24 48 71 96
24 19 38 56 76
23 15 30 44 60
22 12 24 36 48
21 10 20 30 40
20 7.50 15
22
30
First, check the RMS power rating of the speaker system, and its impedance.
Look up this value in the table above, using the closest value
below
the rated power of the
speaker system. Note the corresponding ‘dB’ value. Note that, for safety, always set the
limiter threshold 1 or 2 dB below the maximum allowable worked out using the above
method.
The section in grey will only be relevant when pairs of output channels are bridged. Under
these conditions, the available limiter threshold range will increase by 6dB to +48dB.
The minimum impedance for bridged channels is 4R, so this section of the table is left
intentionally blank. Driving the amplifier into loads lower than those recommended will
result in the channels muting and may result in damage to the affected channels.
3
2.7
is the ideal subwoofer load of 3 x 8
drivers in parallel for most efficient power delivery
