Subwoofer Amplifier/Processor with rack mount option and JLink™ Connectivity

Equipped with flexible features and a robust power amplifier section, the Fathom® SA-600W is an ideal choice to drive a custom subwoofer system in home theater and home audio systems. The full set of Fathom® signal processing features is included, along with additional DSP features, managed through an intuitively designed onboard interface. With its precisely engineered switching power supply and proprietary Class-D amplifier topology, the SA-600W is capable of efficiently delivering up to 600 watts of continuous power.

The SA-600W includes the following features:

Pristine, stereo audio circuit pathways used throughout
Intuitive interface with LCD display provides detailed control of on-board settings and functions
On-board, 2-way active crossover (12/24 dB per octave), capable of supporting a stereo system with a low-pass filtered subwoofer output and high-pass filtered line outputs to feed the main speakers’ amplifier
Built-in, optimized equalizer curves for use with JL Audio subwoofers systems
Fixed or variable level control options
Selectable polarity control (0 or 180 degrees) to optimize subwoofer integration
Programmable delay controls for the SA-600W’s subwoofer outputs and line outputs.
E.L.F. (Extreme Low Frequency) trim applies equalizer cut or boost at 25 Hz (-12 to + 3 dB) to tailor a subwoofer’s response for a particular room.
D.A.R.O. (Digital Automatic Room Optimization) automatically measures and corrects in-room response to optimize low frequency performance (requires optional JL Audio calibration microphone – CAL-MIC1 – sold separately)
Three band parametric equalizer with configurable center frequency, Q and gain, to further optimize subwoofer system response
Grounded or Isolated input mode options for quiet, noise-free performance
Stereo, high-level inputs accept direct connection from amplified receiver outputs when no line level signal is available.
Wireless signal connectivity is available via the optional JLink™ Transmitter/Receiver system (JLink™ TRX – sold separately).
Automatic turn-on options via signal sensing or 12V trigger. 12V input and output triggers to control additional SA-600Ws or peripheral equipment
Front-mounted USB port and DFU button provides easy access to update firmware.
Versatile mounting options for table-top setups or rack-mount installations.

Amplifier Power	600 W x 1 at 3 ohms 450 W x 1 at 4 ohms 300 W x 1 at 6 ohms 225 W x 1 at 8 ohms
Power Mode(s)	Off, On or Automatic (Signal-Sensing or 12V Trigger)
12V Trigger Output Capacity	150 mA (1/8-inch/3.5mm mini jack)
Light Modes	N/A

Unbalanced Inputs	Stereo or Mono (two RCA jacks – Input Impedance of 50k Ohms)
Speaker/High-Level Inputs	Stereo or Mono (removable plug – Input Impedance of 4.4k Ohms)
Input Grounding	Isolated or Grounded
Level Control	Reference (fixed gain) or Variable from -50dB to +15dB over reference gain (0.5 dB increments)
Filter Mode(s)	Low-Pass, with tracking High-Pass Outputs
Filter Slope(s)	12/24 dB/octave
Filter Frequency Range	30 Hz – 130.1 Hz
Filter Defeat Function	Yes
Polarity	0 or 180 degrees
Delay (Phase)	Variable from 0 – 25 ms  (0.1 ms increments, Sub and HP outputs)
Extreme Low Frequency (E.L.F.) Trim	Variable, -12 dB to +3 dB at 25 Hz (0.5 dB increments)
Line Outputs	Stereo or Mono (two RCA jacks – Pass-Through or High-Pass)
Subwoofer Outputs	Neutrik speakOn® 2-Pole Connectors (uses Neutrik part: NL2FX)
Calibration Mode	Digital Automatic Room Optimization (D.A.R.O.), requires microphone (sold separately)
Equalizer Bands	3
Equalizer Frequency Range	20 to 160 Hz (1 Hz increments)
Equalizer Gain Range	-12 dB to +12 dB (0.2 dB increments)
Equalizer Q Range	0.7 to 5.0 (0.1 increments)

Lineart Back Panel, Front Panel and Top-View of SA-600W Amplifier with Height (H), Width (W) and Depth (D) dimension labels

Width (W)	16.84 in / 428 mm
Height (H)	1.75 in / 44 mm
Depth (D)	13.63 in / 346 mm
Net Weight	13.5 lb / 6.12 kg
Note: Single Rack Unit – Amplifier Height Dimensions do not include feet.

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Digital Automatic Room Optimization (D.A.R.O.)

Summary:
JL Audio’s exclusive D.A.R.O. technology uses a powerful on-board DSP to automatically optimize the subwoofer’s in-room frequency response. This leads to a superb listening experience, no matter where the subwoofer is placed.

Detailed Information:
In typical listening spaces, subwoofer and listener placement have a profound effect on the accuracy of low-frequency reproduction. While we always recommend that you place your subwoofers in good-sounding locations, we know that these often can be impractical locations. In the real world, subwoofer placement almost always involves a compromise between sonic performance, practicality and aesthetics.

To face this dilemma head on, JL Audio subwoofer systems incorporate a clever piece of technology called Digital Automatic Room Optimization (D.A.R.O.). The D.A.R.O. system self-generates a series of calibration tones, measures the frequency response at the listening position, and automatically configures an 18-band, 1/6 octave equalizer for a flat end-result. The system effectively allows for smooth, well-balanced sub-bass from a variety of locations that would have been less than ideal without D.A.R.O.

To perform this audio magic, all you have to do is:

Connect the included calibration microphone to the front panel of the subwoofer.
Press the calibrate button on the front panel of the subwoofer.
Hold the microphone at the primary listening position for about a minute.
A few minutes later, you have completed this one-time setup routine.

You won’t need a computer, spreadsheets or complex measurement equipment, and you won’t need to navigate and manipulate complicated interfaces… D.A.R.O. is a fine example of technology in the service of man, if there ever was one.

Read a review of the D.A.R.O. feature on Acoustic Frontiers

High-Damping Feedback Circuitry

Summary:
This proprietary, discrete control circuit design allows our Class D switching amplifiers to maintain an excellent damping factor for improved transient behavior and fidelity.

Detailed Information:
While Class D amplifiers are well known for outstanding efficiency, they have also been known for less than spectacular sound quality due to weak damping of the driven load and poor power regulation. These factors are critical to subwoofer fidelity as they relate directly to the amplifier’s ability to control the motion of the speakers.

JL Audio’s Patented Class D output circuit utilizes a discrete control section and a unique feedback loop design that results in outstanding power regulation with a damping factor that’s vastly higher than other Class D designs and also higher than most Class A/B amplifiers. The benefit of this exclusive JL Audio technology is tight, clean bass reproduction with the efficiency advantage of Class D.

It is a package tailor-made for world-class bass performance.

Download Fathom® SA-600W Product Manual

USA Limited Warranty: Three (3) years from the original date of purchaseWarranty Details

Find the answers to many common questions:

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