Drawmer SL22 Manual - Halaman 5

Jelajahi secara online atau unduh pdf Manual untuk Kompresor Drawmer SL22. Drawmer SL22 13 halaman. Sound level limiter

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allowed to perform. If the SL22 receives increased signal levels, the transparent 'protection' circuitry is activated

which maintains the specified system volume level without degradation in sound quality. With the security plate

replaced a security label can be placed across (supplied) to provide further security and show evidence of tampering

with the settings. In addition, on the right side of the panel three LED indicators complement the simple setup with

simple and 'at a glance' monitoring.

To the rear the difference between the SL22 and the SP2120 is just as apparent. In its development we liaised with

and were approached by local authority commissioners, installation specialists and venue owners who all advised

and recommended attributes to suit their own specific requirements, the result being the addition many more versatile

features that so many other sound level limiters lack. As well as the standard input and output XLRs (that can be

securely locked using the optional tamperproof bracket) the SL22 also features a limited headphone output, that

works in the same manner as the XLR's, plus the ability to be controlled externally via a fire alarm or operator, and

also connections to allow data logging of the SL22's operation, or external visual indication via a light on a wall, for

example.

As the SL22 offers the ability to calibrate and control the level of the dedicated headphone output in just the same

way as the speaker outputs it can be used to prevent hearing damage to anyone wearing headphones on a regular

basis - DJ's, sound engineers in recording studio's, students listening to audio via various media. As well as the

dedicated headphone output the SL22 has additional connectors on the rear that can be used for remote data

logging of its operation, or to operate external indicator's, such as signals on the wall.

The development of the SL22 has been undertaken in conjunction with a multi-national media company needing

to conform to Noise At Work Legislation and protect the hearing of the DJ's in their radio studios. During testing

they had become very disillusioned by the current products on offer, finding that they were either so crude that

they didn't really work, or, at best, the attenuation could be heard and was intrusive. Many products were tried,

and a few experiments, and concluded that the SP2120 was the most transparent product on the market, it just

required a few adaptations to fully suit their requirements - the SL22 is the result of this development.

As well as protecting the equipment the precise calibration and volume controlling of the SL22 allows venues, such

as clubs, theatres, pubs, schools, universities etc. to conform to Local Authority Noise Regulations.

The concept and development of the original Speaker Protector was encouraged by Drawmer distributors and

installers dissatisfied with other protection systems currently available (these often take the form of a crude switch,

either turning off the power or disconnecting the speakers, both of which are 'disruptive' in any event), and the SL22

has taken these ideas and developed them still further. The SL22 offers the same protection, but also is more

responsive and versatile. The controls are only accessible by those holding the supplied tamper-proof screwdriver,

and the rear panel XLR's can be 'locked away' using the optional tamper-proof bracket - making tampering with the

volume levels extremely difficult. In addition, the SL22 has the facility to be controlled remotely, meaning that a

manager can attenuate or mute the volume as required, or it can be connected directly to a fire alarm, reducing the

volume automatically during a fire and allowing the alarm to be heard more clearly.

Whether in a large arena with a p.a. system and multiple speakers, or smaller venues such as bars and theatres,

there are few things more annoying and troublesome than blowing a speaker cone or amplifier electronics. There

are several possible causes for the sound pressure level to rise: it could be caused by sudden spikes and pops in the

system; it may be that the amplifier is too powerful or the speakers have too low a rating and increasing the volume

overloads the speakers; sudden clipping in the audio signal chain causing a sine wave; in a venue an over enthusiastic

DJ may just turn up every knob to get the gig as load as possible: whatever the reason, unlike standard compressor/

limiters, the SL22 has been specifically designed to transparently catch those unwanted SPL's and protect your

gear. Not only will it save money by reducing the cost of speaker repairs, but also reduce 'call-out' costs of sound

system service/repair engineers, lower sound system 'down time' and the consequential loss of venue income, as

well as the reputation of the venue.

1 -

SAFEGUARD YOUR HEARING

Development of the SL22 and Noise at Work

- CONFORM TO REGULATIONS

PROTECT YOUR SPEAKERS