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Overview

JL Audio Fathom Home Amplifier SA-600W Subwoofer Amplifier

600W Class D Subwoofer Amplifier • D.A.R.O. Room Optimization • Active Crossover • Parametric EQ • Rack-Mountable

The JL Audio Fathom SA-600W Home Amplifier is a dedicated 600-watt subwoofer amplifier and DSP controller engineered for custom home audio and home theater subwoofer systems. It combines JL Audio's high-speed Class D amplification with extensive bass-management tools, including Digital Automatic Room Optimization (D.A.R.O.), a two-way active crossover, three-band parametric EQ, variable delay and E.L.F. trim. Garmin Singapore

JL Audio / Garmin Part Number: 010-03308-00 Garmin

600 Watts of Subwoofer Power

The SA-600W delivers 600 watts RMS into 3 ohms, with output scaled for 4, 6 and 8-ohm loads. Its high-speed Class D architecture is designed specifically for powerful, tightly controlled low-frequency reproduction. Garmin Singapore

D.A.R.O. Room Optimization

JL Audio's Digital Automatic Room Optimization uses onboard DSP to compensate for major frequency-response problems created by the interaction between the subwoofer and listening room.

The SA-600W supports D.A.R.O. calibration with the appropriate measurement microphone. Garmin Singapore

Two-Way Active Crossover

An integrated active crossover provides low-pass filtering with tracking high-pass outputs.

Filter frequency is adjustable from 30 Hz to 130.1 Hz, with selectable 12 or 24 dB/octave slopes and filter defeat. This allows the SA-600W to handle considerably more system integration than a conventional standalone power amplifier. Garmin Singapore

Advanced DSP Control

Bass integration can be fine-tuned with three-band parametric EQ, selectable polarity and variable delay from 0 to 25 ms in 0.1 ms increments.

JL Audio's E.L.F. trim provides additional low-frequency adjustment from -12 dB to +3 dB at 25 Hz. Garmin Singapore

Flexible System Integration

The SA-600W accepts both line-level RCA and speaker-level signals, making it suitable for dedicated theater processors, stereo preamplifiers and systems where a conventional line-level subwoofer output is unavailable.

Stereo or mono line outputs can operate as pass-through or high-pass outputs, while the subwoofer connects through a locking Neutrik speakON connection. Garmin Singapore

Technical Specifications

Specification Details
Manufacturer JL Audio
Series Fathom Home Amplifier
Model SA-600W
Part Number 010-03308-00
Product Type Subwoofer Power Amplifier / DSP
Amplifier Design Class D
Power at 3 Ω 600 W × 1 RMS
Power at 4 Ω 450 W × 1 RMS
Power at 6 Ω 300 W × 1 RMS
Power at 8 Ω 225 W × 1 RMS
Power Modes Off / On / Automatic
Auto Activation Signal Sensing or 12V Trigger
12V Trigger Output Capacity 150 mA
Unbalanced Inputs Stereo or Mono, 2 × RCA
RCA Input Impedance 50 kΩ
Speaker-Level Inputs Stereo or Mono
Speaker-Level Input Impedance 4.4 kΩ
Input Grounding Isolated or Grounded
Level Control Reference or Variable
Variable Level Range -50 dB to +15 dB
Level Adjustment 0.5 dB increments
Crossover Two-Way Active
Filter Mode Low-Pass with Tracking High-Pass Outputs
Filter Slopes 12 / 24 dB per octave
Filter Frequency 30 Hz to 130.1 Hz
Filter Defeat Yes
Polarity 0° / 180°
Delay 0 to 25 ms
Delay Resolution 0.1 ms
E.L.F. Trim -12 dB to +3 dB at 25 Hz
Parametric EQ 3-Band
EQ Frequency Range 20 Hz to 160 Hz
EQ Frequency Resolution 1 Hz
EQ Gain -12 dB to +12 dB
EQ Gain Resolution 0.2 dB
EQ Q Range 0.7 to 5.0
Line Outputs Stereo or Mono RCA
Line Output Modes Pass-Through or High-Pass
Subwoofer Output Neutrik speakON 2-Pole
Room Optimization JL Audio D.A.R.O.
Width 16.84 in / 428 mm
Height 1.75 in / 44 mm
Depth 13.63 in / 346 mm
Weight 13.5 lb / 6.12 kg
Installation Tabletop or Rack Mount
Warranty 3 Years

JL Audio's current specifications confirm the SA-600W's output ratings, crossover functions, three-band EQ, D.A.R.O. capability and compact 1U-height chassis. Garmin Singapore

JL Audio at The Grid HiFi

The Grid HiFi designs JL Audio subwoofer systems for two-channel listening rooms, media rooms and private cinemas, with proper attention to subwoofer location, amplification, crossover settings, phase, delay and room interaction.

For custom installations, we can integrate the SA-600W with architectural subwoofers, AV processors, stereo systems, acoustic treatment, Control4 automation and complete home theater systems.

Building a JL Audio subwoofer system? Call The Grid HiFi at (713) 218-8120 and let us design the bass system around your room.

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FAQs

Please read our FAQs page to find out more.

Do you price match?

Yes. We match any authorised dealer, including big-box retailers. If you find the same product at a lower price, contact us and we'll match it.

Do you offer free shipping?

Yes — free shipping on every order, with 2-day delivery available on most products. Easy returns and exchanges are included.

Where is your showroom?

We're at 6362 Alder Drive, Houston, Texas. The showroom lets you hear and compare reference-level systems in person before making any decisions. If you're considering a larger purchase or installation, it's well worth the visit.

Can I buy online without visiting the showroom?

Yes. The full product range is available through the online store with free nationwide shipping. For more complex system builds, speaking with one of our advisers first tends to lead to a better result.

Do you offer financing?

Yes. Special financing is available through the BrandSource Credit Card for qualifying purchases, allowing you to spread payments over time with no annual fee. Promotional rebate savings are also available periodically. See the financing page for full details.

Do you install systems as well as sell equipment?

Yes — installation is central to what we do. We design and install whole-home audio and video, home theaters, media rooms, outdoor audio, lighting and motorised shades, and full smart home automation.

Do you provide support after installation?

Yes. We provide ongoing service and support to ensure systems continue performing as intended — not just on installation day, but over the long term.