JBL Synthesis SDA 4600 Multichannel Power Amplifier

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Model: SDA4600 UPC: 848592001056 Item: 164579

JBL Synthesis SDA 4600 Multichannel Power Amplifier Overview

With the Synthesis surround system – a direct descendant of the Pro Cinema industrial line – JBL redefines the home cinematic experience. Individually, the components of the custom line are exemplary enough to fit into any top-shelf installation. But when combined into one unified system, JBL’s Synthesis speakers and electronics form a scalable end-to-end solution designed to transform any size or shape environment into an unparalleled soundstage. Take the SDA 4600 multichannel amplifier. This custom-installation amp has the power not just to drive your speakers, but also to adapt to your requirements. Multichannel means just that: configurable as 2, 4 or 8 channels, with power specs of 300, 600 or 1,200 watts, depending on your needs. Pairs of channels can be operated in “bridged,” or combined, mode, to double output. Parent company Harman’s proprietary DriveCore technology packs more power into a smaller space, allowing top performance to be offered in a low-profile, rack-mount form factor. Auto on and off, remote configuration and monitoring via phone or pad, full digital connections to other electronics in the Synthesis line, and balanced inputs for the lowest-noise connections, all accommodate the most complex installations. Teamed with JBL’s equally incredible SDEC-4500P multichannel equalizer and SDP-75 Synthesis home cinema surround processor, you’ve got a super-system ready for whatever the future may hold.

Product Information

Product highlights

  • 4 channels by 600 watts as shipped, configurable for 2-4-8 channels @ 300, 600 or 1,200 watts
  • Channel pairs can be operated in bridge mode to double output
  • Digital end-to-end connection via Harman’s BLU-Link, CAT-5 chaining among amplifiers
  • Up to 128 uncompressed channels in the system, and 60 amplifiers combined in the signal chain
  • Balanced analog inputs for lowest noise
  • DriveCore technology for more power in smaller rack-form factor, for ease of installation
  • Custom installation connections via auto-on and off and standby (only channels being used are active) and network monitoring and control
  • Internal cooling fans for quiet, efficient heat dissipation
  • Dimensions: 3.5" high x 19" wide x 14.25" deep
  • Weight: Greater than 30 lbs.
  • Warranty: 5 years – World Wide Stereo is an authorized dealer for every brand we sell
  • Included: World Wide Stereo 60-day guarantee and expert product support

Built to suit your needs

As part of the custom-installation JBL Synthesis home cinema system, the slim, powerful SDA 4600 power amplifier is designed to make your theater come alive – no matter how complex it may be. Harman’s BLU-Link fully digital connections (via CAT-5 computer cable) can carry up to 128 uncompressed signal channels from processor to equalizer to amplifier, and up to 60 units can be daisy-chained in a single system. That means, whatever the size, whichever the speakers, and whatever the signal, one or more SDA 4600s can power you to ultimate pleasure.

Compact package

The SDA 4600 comes configured out of the box for 4 channels at 300 watts each – but don’t let that stop you. You can custom configure each Synthesis amp for 2, 4 or 8 channels, and up to 600 watts per channel, as desired. And with an advanced universal power supply with power factor correction, you can count on efficiency and reliable output, with minimal heat buildup thanks to the built-in fans.

Team player

As part of a system, the SDA 4600 knows when to be quiet. Auto on-off and standby mean that only the channels you need, when you need them, switch on and power up.  And you can control and monitor the amplifier’s performance and operation statistics via network protocol, over a standard laptop, tablet or any other connected device.  

Maximum synergy

The SDA 4600 is designed for custom configuration, and it absolutely shines when combined with JBL’s Synthesis in-wall speakers and electronics in a single, synergistic system, including the extravagant SDEC-4500P equalizer and SDP-75 16- to 32-channel digital surround processor. The entire Synthesis cinematic setup… well, you just have to hear it to believe it.

Listen and be amazed

We at World Wide urge you to stop in if you’re in the neighborhood of our Ardmore, PA showroom, for a theatrical demonstration of the full Synthesis system. It’s guaranteed to leave you breathless. And as always, you can count on our unmatched product support and 60-day guarantee.

WWS: What we say

“It’s a different experience. There’s watching television, there’s going to the movie theaters, then watching theater in a JBL Synthesis room is the next level up. It’s that much of a difference, better than a theater by far.” – Robert Marcoccia, World Wide Stereo Ardmore Sales & Systems Designer

Prop 65 Warning

WARNING: California Residents - Proposition 65. This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.



  • Channels: 4
  • Frequency response: ±0.25dB
  • Signal-to-noise ratio (A-weighted): >108dB
  • THD: <0.35%
  • Voltage gain: 34dB
  • Input connectors: Balanced 3-pin block connectors, one per channel
  • Output connectors: 2-pin terminal strip
  • Aux connector: 3-pin block connector
  • Dimensions (H x W x L): 3.5" x 19" x 14.25"
  • Weight: <30 lbs.

What's in the Box

What's in the Box:

  • SDA 4600 Multichannel Power Amplifier
  • Manual



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Prop 65 Warning

WARNING: California Residents - Proposition 65. This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.