Bedienungsanleitung HQ Power VPA2100U1 - Oneliner 100 (Seite 5 von 35) (Deutsch, Englisch, Holländisch, Französisch, Spanisch)

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VPA2100U1 Rev. 01

29/07/2011 ©Velleman nv

An Overview on the Different Noise Levels

10dB – Heartbeat

25dB – Whisper

40dB – Average home

50dB – Light traffic

60dB – Normal conversation

70dB – Vacuum cleaner

80dB – Telephone ringing

90dB – Pneumatic drill

100dB – Power mower

120dB – Boom box in car

130dB – Pain level

140dB – Jet plane 30m overhead

• It is important to know that a 3dB increase will double the sound level. The human hearing only

recognises a doubling of the sound level when the noise level is increased by 10dB. Hearing loss

does not depend on the sound level but on the noise level and starts way before than the pain

level.

• Many a one deceives himself by thinking that noise is something you can get accustomed to.

Nothing is further form the truth!

• The reason why some people have got accustomed to a certain noise level and are no longer

disturbed, is that they have already suffered hearing loss. The damage makes the hearing

insensitive to the frequencies forming the loudest part of the noise. Getting accustomed to noise

does not mean anything other than trying to get along with hearing loss in everyday life. Hearing

loss cannot be recovered and can only be compensated with hearing aids. Subjectively, hearing

loss feels like having dampened ears. This effect weakens with time but loss in hearing sensitivity

is permanent.

• In order to relax your hearing sufficiently, the noise level should not exceed 70dB for 10 hours.

Higher noise levels during this relaxing period can prevent relaxation and promote permanent

hearing damage or hearing loss.

WARNING: Protect your ears if you want to prevent hearing damage!

7. Features

• outstanding tone

• original appearance and precise manufacturing

• protection circuits

• limiter to prevent speaker damage when the amplifier is overloaded

• high audio frequency performance

• amplifier-on time delay and amplifier-off mute protection protect the speaker from transients

8. Description

Refer to the illustrations on page 2 of this manual.

a. Front panel (fig. 1)

1. Power switch

To turn the unit ON or OFF, press this button. Before turning ON the amplifier check all

connections and turn down the level control. A momentary muting is normal when turning the

amplifier ON or OFF.

CAUTION: Always turn on your amplifier last, after all your other connected equipment, and

always turn OFF your power amplifier before your other connected equipment.

2. Power LED indicators

These LEDs illuminate when the power is turned ON.

3. Limit LED indicators

These LEDs illuminate if any section of the power amplifier’s input are within 3dB of clipping.

Occasional blinking of the LEDs are acceptable, but if they remain on more then intermittently

you should turn down the level on the amplifier or reduce the output level of the preceding

component to avoid audible distortion.

4. Signal LED indicators

These LEDs illuminate to confirm the presence of an input signal greater than 100mV at that

channel of the amplifier.

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HQ Power VPA2100U1 - Oneliner 100 Seite 5

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