MSRP: $799.99
Was: $499.99
Now: $449.99
(You save $350.00 )
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Crescendo Audio Symphony S6 Full Range Class D Amplifier:


Crescendo Audio's engineers started designing an ideal six-channel amplifier for today's car audio needed years ago.


This is the final product. A highly versatile, powerful six-channel capable of running all the speakers and subs of the average daily vehicle, powering a high fidelity sound quality 3-way front stage, or driving some of our loudspeakers while utilizing three different pairs of customizable signal outputs!


The new & improved Symphony amplifiers are packed with even more power density than the highly renowned originals!


The S6 is rated for over 1200w of clean total RMS output!

Efficient design only requires the use of 4 gauge power and ground cables.


New Custom tooled Symphony heatsink optimized for uncompromising heat dissipation while keeping form factor at an all-time low.


Built-in 18db/Slope crossover network grants precise adjustment of your system's needs and features LPF/HPF & Bandpass and allows

the user to control the frequency points up to 8khz! 


Fully defeat-able high pass and low pass filters for those who don't wish to use the onboard active crossovers (already using DSP).


The S6 Features a 2ch/4ch/6ch selector switch (No RCA splitters will ever be needed).


All Symphony models utilize heavy copper traces in the Korean built boards and top quality components used throughout. 


Input signal transfers cleanly to the board via the Tiffany style RCA input jacks.


S6 Rated RMS rated output @ 13.8v (RMS):

Channels 1 through 4:

  • 2ohm: 170w 
  • 4ohm: 100w

channel 1/2 or 3/4 Bridged at 

  • 4ohm: 350w

Channel 5 and 6:

  • 2 ohm: 350w 
  • 4 ohm: 200w

Bridged at 4ohm: 700w

S6 Dimensions: 13.25"L x 7.6"W x 2.5"H

120 to 150a fuse for the power input suggested

4 Reviews Hide Reviews Show Reviews

  • 5
    Crescendo S6

    Posted by Bob Fisher on Apr 13th 2021

    Super compact 6 channel amp that puts out surprising power to all channels I wish crossover was had detent for exact frequency because the range is huge! All in all very nice amp! Quick ship! Be back for more soon! Thx D4S

  • 5
    Awesome amp

    Posted by eric reppond on Jan 13th 2020

    This amp is spectacular, I replaced a audio control LC 6.1200 and I can honestly say it seems to be cleaner and slightly more powerful even though their both 1200 watt amps. Very versatile and well built. Longevity will truly tell the story., but as far as a track record crescendo amps that I've had are tanks and super stout. Would recommend

  • 5
    Crescendo symphony S6 amp

    Posted by Dale Rappe on Oct 6th 2019

    Great product as always from crescendo and super fast shipping and service from Down4sound my first choice for audio equipment

  • 5
    Great buy

    Posted by curtis heckman on Jun 22nd 2019

    I was always a JL Audio fan and was skeptical of anything else. I replaced a JL XD 600/6v2 with this amp and let me tell you it made a huge difference . I will definitely not hesitate in the future with crescendo products. The built in clipping lights make it easy to setup and it’s loud. JP and downforsound have the best service and shipping I have ever seen too. Big thumbs up.