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Atlantic Technology System 6200 Manual de instruções

Instruction Manual

the bass from that channel to the subwoofer. If your processor/receiver

offers this choice,all Atlantic Technology satellite speakers should be set

to Small,regardless of their size.

For those of you who may have heard otherwise, the choice of Large or

Small is not a matter of opinion, preference, taste, or based upon the

phases of the moon. So please ignore any and all free and helpful (and

many times incorrect) advice and set them to Small. In fact, the vast

majority of speakers on the market today should be set to small.As a rule

of thumb, if any satellite speaker in your system doesn't have a 10-inch

diameter or larger woofer,it most probably should be set to Small,as far

as Bass Management is concerned.

The PHASE Control

A subwoofer operating out of phase with the rest of

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the system won't provide optimum low frequency

performance. Also, the correct subwoofer phase can

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help compensate for room acoustic anomalies.There-

fore, a PHASE switch that will alter the phase of the

PedWoofers is provided on the amplifier.It has 4 posi-

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tions (0°,90°,180°,270°) for added flexibility. To set the PHASE control,

insert the supplied Atlantic Technology/Sencore Test and Training CD in

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your CD/DVD player and select the broadband bass test tones on Track

16.Have someone sit in the prime listening position to evaluate the sound.

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Pay particular attention to the transition of bass from the subwoofer to the

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satellite speakers.You can also listen to a musical source such as a CD or

DVD,with strong bass content that spans the range from deep bass to mid

bass (a well recorded jazz disc with someone playing a full stand up bass is

always a good choice). It' s best not to use a"one note"special effects track

like a big explosion or dinosaur stomping to test the subwoofer.Experiment

with the position of the PHASE control(s) to get the best transition from

sub to satellites.We suggest you unplug the input to one PedWoofer chan-

nel at a time to set the PHASE control for the other channel (always turn off

the power before unplugging or plugging in any connections).It should be

obvious which is the correct setting.In particular,there will be a smoother,

more integrated transition between the satellites and the subwoofer when

they are properly phased.

Atlantic Technology

Parametric Room Equalizer (EQ)

N N O V A T I V E

O M E

In order to optimize the performance of your PedWoofers the parametric

equalizer should be utilized. The built in Parametric EQ(s) allow you to

select the frequency you want to adjust, and how wide a band on either

side of that frequency you're going to adjust with it. They are designed

specifically to remove (turn down) unwanted peaks in the bass. The

procedure is fairly simple: the included Atlantic Technology/Sencore

Test and Training CD is used along with a SPL meter to define the single

largest bass peak at the prime listening position and then reduce it with

the Parametric EQ.

The test and setup CD also includes a wealth of general information con-

cerning sound reproduction and home theater, in addition to the test

tones. Although the test tones can be used to set the EQ "by ear" we very

strongly recommend using a Sound Pressure Level meter or a Real Time

Analyzer to set the Parametric EQ.

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H E A T E R

Adjusting the Parametric EQ Using a Meter or

Real Time Analyzer (RTA)

IMPORTANT NOTE: During all set up operations except setting the

Phase control it will be beneficial to shut off or disconnect all the

speakers except the PedWoofers.

It's important to complete the preceding steps regarding speaker setup

before adjusting the parametric equalizer. Once they're complete, insert

the Atlantic Technology/Sencore Test and Training CD into your CD or

DVD player and go to Track 16, which is a full range test signal includ-

ing all bass frequencies from 20Hz to 120Hz. Set the BASS LEVEL of a

single 8200 PedWoofer to 75dB at the primary listening position.With the

6200 system set the total PedWoofer output to 75dB at the prime listening

position. If you are using an RTA, set it to at least 1/6

and slow response (Use slow response to allow the meter to average the

standing waves that build up in the room). Continue using Track 16 to

observe the overall response of the PedWoofer.It is highly likely that you

will find at least one significant peak (between 20Hz and the crossover

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point set on the amplifier or in the processor).Write down the center fre-

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quency of the peak,how wide the peak is (by noting the upper and lower

frequencies where it starts and stops) and how large it is,in dB.

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SA-700

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Servo Controlled

Subwoofer Amplifier

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calibrated in octaves. An octave is a doubling or halving of any chosen

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frequency.For example,if the chosen frequency is 40Hz,1 octave higher

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would be 80Hz,and one octave lower would be 20Hz.Since the WIDTH

control ranges from 0.2 octave to 1.5 octaves you see that you can adjust

from a fairly narrow band to a fairly wide band on either side of the center

frequency.Next,set theATTENUATION control to the approximate minus

dB value to compensate for the peak. Measure the bass response again

and see how much you have reduced the overall peak.You may need to

fine-tune the controls to smooth the response as much as possible.

Setting the Parametric EQ Using an SPL Meter

If you only have an SPL meter, set the meter to C Weighting and Slow

response. Set the PedWoofer(s) output to 75dB at the listening position

as outlined above using Track 16 of the test disc.Sit in the prime listening

position with a pencil and paper play Tracks 1-15 sequentially to measure

the subwoofer response. Take enough time with each measurement to

allow the meter to stabilize.Write down the measured level for each fre-

quency,covering the range from 20Hz to the crossover point selected on

the subwoofer amplifier or in the receiver/processor. Once again,you will

most likely find one or more significant peaks in the bass response.Pro-

ceed as detailed above to reduce the largest peak as much as possible.

System Setup and Operation

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octave resolution

Begin setting the para-

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metric EQ by adjusting

the FREQUENCY control

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to the approximate cen-

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ter frequency of the peak.

Next adjust the WIDTH

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control to the approximate

width of the peak. Note

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that the WIDTH control is

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