Safety Notes - Monacor DSP-1 Manual De Instrucciones

Please unfold page 5. Then you can always see the
operating elements and connections described.
1 Applications
The module DSP-1 serves for the protection of sensi-
tive speakers in case of overload by excessive level
peaks. The max. admissible load can be adjusted. The
positive wire to the speaker is interrupted by a relay if
the adjusted power is exceeded.
There is no impairment like power loss or sound
influence. The module is especially used for tweeters,
but it can also protect midrange speakers or smaller
multi-way speaker systems in the entire audio range
from 20 Hz to 20 kHz. A subsequent mounting into
existing systems is possible without problems.

2 Safety Notes

This module corresponds to the directive for electro-
magnetic compatibility 89/336/EEC.
The module is only suitable for indoor use. Protect it
against humidity and heat (admissible ambient tem-
perature range 0 – 40 °C).
For cleaning only use a dry, soft cloth. Do not use
any chemicals or water.
If the module is used for other purposes than orig-
inally intended or if it is connected in the wrong way,
no liability can be taken over for possible damage.
If the module is to be put out of operation definitively,
it must be disposed of in a local recycling plant.
3 Connection
The entire connection can be taken from the wiring dia-
gram on page 5.
1) Connect the amplifier output or the output of the
crossover network for the speaker to be protected
to the contacts IN+ (positive pole) and IN- (nega-
tive pole).
2) Connect the speaker to the contacts OUT+ (posi-
tive pole) and OUT- (negative pole). Pay special
attention to the correct connections of all negative
and positive poles. Otherwise the sound may be
impaired by a reversed phase.
3) If an optical indication is desired to show that the
module has responded in case of overload, a series
connection consisting of a protective diode
(1N4007), a series resistor (1 – 5 kΩ, 0.5 W), and an
LED may be connected to the contacts LED+ and
LED-. However, these components are not re-
quired for a perfect protection function.
The breaker contact for the speakers consists of
a selector switch. Thus, in case of overload the out-
put voltage of the amplifier switches to the contact
LED+. If an LED is connected to this contact, the
LED lights to the beat of the overload.
4 Adjusting the Threshold
The threshold for the protection circuit is factory-set to
approx. 20 W for an 8 Ω speaker. This corresponds to
40 W for a 4 Ω speaker. By turning trim potentiometer
TR1 (a) clockwise, the threshold can be adjusted to
max. 200 W for an 8 Ω speaker. This corresponds to
400 W for the connection of a 4 Ω speaker.
For exact adjustment a heavy duty resistor, an
effective voltmeter and a sine generator or test CD are
required. If necessary, contact an specialized work-
shop.
Caution! If the threshold is adjusted too high, there is
no protection of the speaker by the module.
5 Specifications
Threshold
of the protection circuit
for 8 Ω speakers: . . . . . . . approx. 20 – 200 W
for 4 Ω speakers: . . . . . . . approx. 40 – 400 W
Power supply: . . . . . . . . . . . not required
Admissible
ambient temperature: . . . . . . 0 – 40 °C
Dimensions: . . . . . . . . . . . . . 75 x 42 x 50 mm
Weight: . . . . . . . . . . . . . . . . . 110 g
Subject to change.
GB
7