Quick Setup / With Filter Setting Instructions - BLUE SKY SUB 15 UNIVERSAL Owner's Manual

1000-watt subwoofer with adaptive x-over

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Quick Setup

If you haven't already done so, carefully remove all items from the

packaging and confirm that everything that is listed on page 4 is

included. [SUB 15 Universal - What is included?].

The SUB 15 Universal is compatible with XLR input / output

connections. For more information on connecting your system,

please see page 6 [System Signal Connection].

The first step in the installation process is to position the subwoofer.

Although you have great flexibility with regard to where the active

subwoofer can be placed, a good starting point is centered

between the left and right satellite speakers. This could be under

a console / desk, behind the console / desk, etc. For an expanded

subwoofer placement guide, please see page 9 [Subwoofer

Placement Guide].

Once the subwoofer is in position, connect the two input cables

from the left and right analog outputs from the mixing console,

digital workstation or other source, to the left and right inputs on

the subwoofer.

For more information on connecting your system,

please see page 6 [System Signal Connection].

Our recommended position for the nearfield monitors is based

on an ITU standard and sets the speakers at 60 degrees from the

listener, forming an equilateral triangle (a triangle with equal sides)

- See Figure 2. Fortunately, this setup eliminates most of the math

and is easily simplified to the following guidelines: If you want to

sit 1 meter (39.37 inches) from the monitors, place the speakers

1 meter apart. If you want to sit 6 ft. from the monitors, place the

speakers 6 ft. apart. Etc. Ideally your monitors should be at seated

ear height. If this is not possible, tilting the cabinet at the listening

area can improve high-frequency coverage.

Once all the monitors are properly placed, connect your left

nearfield monitors to the left output on the back of the sub, via

XLR cable. Now do the same for the right channel, connecting the

right nearfield to the right output. Lastly, please plug in the power

cord to the IEC connector on the subwoofer. Prior to proceeding

confirm that the system is wired correctly, as shown on page 6

[System Signal Connection].

At this point the monitoring system is correctly configured, and

ready for the final step in the installation. Prior to plugging the

system into the wall outlet, and powering up the system, do a final

quick check of all connections and level settings.

If everything is correct, plug the power cord into the wall outlet.

Do not turn on the power switches, yet! Some mixers and

out-board equipment such as D-to-A converters and equalizers

generate loud rail-to-rail pops when they initially turn-on.

Depending on the level and the gain setting of the monitoring

system, these pops could damage your monitors. To avoid this,

always turn on equipment in the following sequence: All sources

and mixer first, then the SUB 15 Universal and then rest of your

monitoring system.

10.

It is now time to set the Variable Cutoff Frequency on the back of

the SUB 15 Universal to best match your monitoring system (if you

are using the SUB 15 Universal with Blue Sky monitors, set the Filter

Selector Switch to "BLUE SKY" and skip to item 11). To determine

the proper filter setting on the SUB 15 Universal, you first need to

know the cutoff frequency of your monitors. This can typically be

found in the manual, under specifications and may look like this:

40Hz to 20kHz +/-3dB. The low frequency cutoff off for the

monitor in this example would be around 40Hz. We recommend

you set the SUB 15 Universal

frequency. To go up one octave, multiply the LF cutoff frequency

times two. In our example this would be 80Hz, because 2 x 40Hz

= 80Hz. Make sure to set both the left and right channel to

the same setting.

11.

At this point the Blue Sky monitoring system is fully operational, and

ready for use. Begin by playing familiar pieces of music, which can

assist you in the fine-tuning first the level and then the placement

of the subwoofer. It is important to remember that the positioning

of the subwoofer in the room will impact the subwoofer level.

You may find it necessary to increase or decrease the level of the

subwoofer to best match your monitors. Again use a familiar piece

of music which includes plenty of LF material to help you set the

proper level.

12.

If a more exacting setup is required, using test signals and a SPL

meter, please see Page 9 [Expanded Calibration Guide].

13.

Just remember - Use your ears, they are the best audio tool you

have and you will be amazed how accurate the setup can be if you

use familiar audio material during the setup of the system.

14.

Congratulations! You have now completed the "quick setup" of the

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SUB 15 Universal. If you have any questions, please do not hesitate

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to contact us directly with your questions. (516) 249-1399 (9:00am

to 5:30pm EST) or visit our web forum www.abluesky.com/forum

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A note about the LF EXTENSION and PHASE switches:

One of the SUB 15 Universal's unique features is a switchable low

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frequency response characteristic, of either 30Hz to 200Hz +/-

3dB or, in "extended LF mode", 20Hz to 200Hz +/-3dB (anechoic),

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marked 30Hz and 20Hz respectively. The extended mode is ideal

for large rooms that don't exhibit the room gain phenomenon of

smaller sealed spaces. The only way to be absolutely sure of

which setting is appropriate for your studio is to use an acoustic analyzer.

Using the 20Hz in a sealed space, such as a small to medium size studio, can

result in a rising LF response characteristic below 30Hz.

The PHASE setting on the SUB 15 Universal should typically be set to 0,

especially when the SUB 15 Universal is used with Blue Sky SATs. However,

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there may be times, depending on the speakers used with the SUB 15 Universal

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or because of certain acoustic conditions, that the phase setting needs to be

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set to 180, so as to get proper summation between SAT and SUB. The only way

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to be absolutely sure which setting is appropriate for your studio is to use an

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acoustic analyzer.

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Figure 2

one octave above this cutoff

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Quick Setup / With Filter Setting Instructions - BLUE SKY SUB 15 UNIVERSAL Owner's Manual

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