Coda C5 Manual do Utilizador descarregar pdf (Página 6)

The Feedback loop controlled subwoofers have clear ad-

vantages over conventional subwoofers when it comes to

sonic performance, output and size.

The advanced design aligns several new technologies for

outstanding performance.

Key technologies

• Awardwinningsensorcontrolledtechnology

• Feedbackloopcontrol–ultralowdistortion,veryextend-

ed and controlled response

• Longexcursion18”wooferswithintegratedvelocitysen-

sor

What is the Velocity Feedback Loop Comparator?

The specially designed 18” driver includes a built in “velocity

sensor” that measure precisely the movement of the voice

coil. The “velocity sensor” sends information to the Com-

parator about velocity, excursion and speed of the voice coil

(using XLR cable).

The comparator unit of the Coda comparator amplifiers

compares the original input signal to the movement mea-

surement from the “velocity sensor” and adjusts the am-

plifier driving voltage and/or current so that the diaphragm

moves the way it should move. This compensates in real

time for the non linearity of the speaker/cabinet.

Reduced group delay

This is a big issue that is most often overlooked in conven-

tional designs. The feedback comparator technology offers

great advantages in the time domain. In fact the upper bass

and the very low frequency are time aligned which means

they are reproduced at the same time resulting in extremely

accurate and musical bass reproduction.

Transducers

The Sensor controlled subwoofers are equipped with ex-

tremely long excursion 18” neodymium ultra low distortion

woofers with integrated velocity sensors that measure, com-

pare and control cone movements. The neodymium motor

delivers extreme high magnetic flux for increased efficiency.

The 4” voice coil is 50 mm high, ensuring ultra linear ex-

cursion of 40 mm / pp at consistent magnetic force. State

of the art carbon-fiber cone ensure maximum stiffness and

low moving mass. Three aluminum shorting rings reduce

inter-modulation distortion; minimize induction variation

while reducing thermal compression. This design reduces

dramatically the distortion of a typical subwoofer at longer

excursion levels, and improves the overall sound quality and

performance characteristics of the cabinet. The sensor is in

fact an additional voice coil connected to the loudspeakers

voice coil in a high precision, magnetically shielded system.

Electronics and Cabling

The Coda Audio comparator amplifiers provide integrated

power and feedback loop control solution for the Sensor

controlled subwoofers. The comparator’s electronic circuit

loop measures the voice coil excursion of the driver and cor-

rects the signal, significantly decreasing distortion. The unit

is set for flat frequency response down to 25 Hz (-6 dB).

Sensor controlled subwoofers

AIRLINE LA- / SC-Series

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