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Overview

When it comes to subwoofers, CODA Audio has a sizeable offering of extremely smart boxes for a wide range of applications. What’s particularly smart about these subs is the fact they are sensor controlled, which means they’re way ahead of the field from the offset: these speakers are capable of delivering measurable and very audible advantages in impulse response, group delay, waterfall, and the distortion domain.

In short, between 35 and 100Hz, the audio is time aligned; and the group delay increases slightly in the 25-35Hz range. As a result, you get an extremely precise and musical low end, with sonic qualities that go way beyond any conventional port loaded system.

At the core of SC4 are its two very efficient, high output 18-inch long neodymium excursion woofers, which provide a completely flat response down to 20Hz (-6dB), and hardly any distortion at all.

Then, as with all CODA products, comes the unique driver capabilities: SC4 has a built in ‘velocity sensor’ within its 18-inch driver, which measures the exact movement of the voice coil by sending information over XLR cable to the Comparator about velocity, excursion, and speed of the voice coil itself.  In turn, the Comparator then compares the original input signal to the movement measurement from the ‘velocity sensor’, and adjusts the amplifier driving voltage and/or current, so the diaphragm can move the way it should move.

The Comparator brings Total Harmonic Distortion (THD) down by a massive 80-90%, which means this speaker can be modified without any equaliser or high pass filters: the Comparator not only compensates for the non-linearities of the speaker, but the frequency response as well.

Furthermore, the output to size ratio of this box is pretty remarkable, reducing up to 50% of the cabinet volume: in real terms, that means this 2 x 18-inch cabinet is basically the same size as a conventional 18-inch sub. Twice the room in the truck, half the relative cost.

SC4 can also be ordered with or without flying hardware, so they can be hung or ground-stacked in any number of configurations for touring sound applications, live music clubs, theatres, nightclubs, or Houses of Worship.