MartinLogan Prodigy Specifications download pdf (Page 11)

Placement 11

Imaging

In their final location, your Prodigys should have a stage width

somewhat wider than the speakers themselves. On well

recorded music, the instruments should extend beyond

the edges of each speaker to the left and to the right, yet a

vocalist should appear directly in the middle. The size of

the instruments should be neither too large nor too small.

Additionally, you should find good clues as to stage depth.

Make sure that the vertical alignment, distance from the

front wall, and toe-in, is exactly the same from one speak-

er to the other. This will greatly enhance the quality of

your imaging.

Bass Response

Your bass response should neither be one note nor should

it be too heavy. It should extend to even the deepest organ

passages, yet it should be tight and well defined. Kick-drums

should be tight and percussive—string bass notes should

be uniform and consistent throughout the entirety of the

run without any booming or thudding.

In order to reduce these effects and allow for more flexibility

in positioning, the MartinLogan design team developed

the revolutionary ForceForward Bass alignment system.

This innovative technology controls the first reflective bass

energy from the front wall—minimizing the typical 50Hz

suck-out and 100Hz peak.

Tonal Balance

Voices should be natural and full, cymbals should be

detailed and articulate yet not bright and piercing, pianos

should have a nice transient characteristic and deep tonal

registers as well. If you cannot attain these virtues, read the

section on Room Acoustics (pages 12–13). This will give

you clues on how to get closer to those ideal virtues.

Final Placement

After obtaining good wall treatments and attaining proper

angle, begin to experiment with the distance from the wall

behind the speakers. Move your speaker slightly forward

into the room. What happened to the bass response?

What happened to the imaging? If the imaging is more

open and spacious and the bass response is tightened, that

is a superior position. Move the speakers back six inches

from the initial setup position and again listen to the imaging

and bass response. There will be a position where you will

have pinpoint imaging and good bass response. That position

is the point of the optimal placement from the front wall.

Now experiment with placing the speakers farther apart.

As the speakers are positioned farther apart, listen again,

not so much for bass response but for stage width and

good pinpoint focusing. Your ideal listening position

and speaker position will be determined by:

•Tightness and extension of bass response

•Width of the stage

•Pinpoint focusing of imaging

Once you have determined the best of all three of these

considerations, you will have your best speaker location.

The Extra “Tweak”

As a final test of exact placement, use these measurements

for your speakers placement, and see what can happen to

the ultimate enhancement of your system’s performance.

These two basic formulas will determine optimum placement

of your speakers to minimize standing waves.

1. Distance from the front wall (the wall in front of the listening

position) to the center of the curvilinear transducer. To

determine distance from the front wall, measure the height

of your ceiling (inches) and multiply the figure by 0.618

(i.e. ceiling height in inches x 0.618 = the distance from

the front wall to the center of the curvilinear transducer).

2. Distance from the side-walls to the center of the curvilinear

transducer. To determine distance from the side walls,

measure the width of your room in inches and divide

by 18. Next, multiply the quotient by 5 (i.e. room width

in inches/18] x 5 = the distance from the side-walls to

the center of the curvilinear transducer).

Enjoy Yourself

The Prodigy is a very refined speaker and benefits from care

in setup. With these tips in mind you will find, over your

months of listening, that small changes can result in

measurable differences. As you live with your speakers, do

not be afraid to experiment with their positioning until

you find the optimal relationship between your room and

speaker system that gives to you the best results. Your efforts

will be rewarded.

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MartinLogan Prodigy Specifications Page 11

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