Bedienungsanleitung JL Audio 12W7 (Seite 2 von 16) (Englisch)

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YELLOW OPTIMUM:

This zone represents the best balance

between long-term reliability, high

output and low distortion performance.

In this zone, you will be taking full

advantage of the woofer's optimum,

low-distortion performance range

without undue risk of failure.

RED MAXIMUM:

In this zone, low-distortion output and

long-term reliability will be compromised

(especially by an aggressive user). Slightly

more SPL will be gained by pushing the

power into this zone, but typically not

more than 2dB, compared to the yellow

zone. The closer you are to the black

zone, the higher the likelihood of driver

failure. Operate with caution.

BLACK WARRANTY VOID:

We do not recommend operating

woofers at this level of power. In this

zone, there is a very high probability that

the driver will fail due to excessive heat

and/or mechanical stress.

Subwoofer drivers operated at

these levels of power are NOT

covered under warranty.

GREEN MINIMUM:

From a reliability standpoint, this zone

represents a very comfortable operating

power range for each driver. This level

of power will not stress the woofer but

will not extract all of its performance

potential, either.

Use of less than the minimum power

level will not damage the woofer, but may

result in unsatisfactory performance.

Thank you for purchasing a JL Audio W7 subwoofer driver. The W7

embodies JL Audio’s commitment to pushing the envelope of speaker

technology, with eight patented technologies, a design patent and a

completely unique set of component parts. Each W7 model has been

meticulously engineered to reproduce sub-bass with extreme fidelity

at any volume level, provided it is installed and tuned properly. Please

review the information in this document carefully so as to maximize your

enjoyment of the W7’s capabilities.

Two enclosure recommendations are listed for each model,

one sealed and one ported. The sealed enclosure design will,

in most cases, give you the best overall sound quality and take up the

least space in your vehicle. The ported enclosure design will deliver

additional output over the sealed enclosure (about 3 - 4 dB more)

and will also maintain excellent sound quality, but it will require

significantly more space to install. The recommended ported

enclosure is not designed for peaky “competition SPL” performance,

it is designed for music listening. It will be very loud and sound extremely

good when set up properly.

An Introduction

When designing systems with W7 drivers, it is very important to achieve a good power match between the subwoofer amplifier and the subwoofer driver's capabilities. The power levels listed in the above

chart represent continuous (RMS) amplifier power per woofer and assume that the user will regularly make full use of that power without drastically overdriving (clipping) the amplifier(s). Make sure you

factor system impedance and the total number of subwoofers into your calculations. Adhering to these power recommendations will result in systems that are both reliable and enjoyable.

RECOMMENDED CONTINUOUS RMS POWER RANGE FOR ONE SUBWOOFER DRIVER:

In addition to the enclosure recommendations, we also provide

recommended amplifier settings for JL Audio amplifiers used with

W7’s. Some of this information is also applicable with other brands of

amplifiers (like crossover points and slopes), some is not (like the voltage

levels specified for input sensitivity settings). You will notice that our

recommended settings do not include any bass EQ boost... this is because

W7’s rarely require any equalization to produce smooth frequency

response. If you have an equalizer in your system (or one is included in

your head unit or amplifier), defeat all bands below 125 Hz before dialing

in your new system settings. Please turn off all sound processing that

would affect the subwoofers (loudness circuits for example).

For optimum sub-bass performance, the amplifier input sensitivity

must be adjusted to avoid excessive distortion (clipping) of the

amplifier output. With W7 subwoofers, a clipped amplifier output will

manifest itself audibly as a low-level “mechanical” sound coming from the

speakers. Proper input sensitivity setting will avoid this problem. Overly

high input sensitivity settings result in no additional clean output but will

result in poor sound quality and reduced speaker reliability.

Please consult the input sensitivity setting information on page 14 of this book.

250W 500W 1000W 2000W 4000W125W

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