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Symphony S800/4 4 Channel

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Your Price:
$314.99 (You save $185.00)
12.00 LBS
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Product Description

Discontinued - Replaced by the s4



Introducing the new Symphony series amplifiers. These amplifiers are the results of over 2 years of from the ground up development.

The goal was to combine high fidelity signal clarity to an extremely efficient Class D full range circuit topology, housed in an ultra-compact newly designed Crescendo Symphony heatsink.

Comprehensive signal processing on the multi-channel Symphony amplifiers, such as bandpass capable crossover circuitry and individual clipping indicators for each channel make the 2 and 4 channel Symphony amplifiers some of the most versatile on the market.

All Symphony amplifiers are capable of being mounted in constricted areas of your car install if needed thanks to the dense form factor and effective design of the heatsinks.

The final outcome of the PCB design enables up to 97% efficiency @ 2 ohms on the monoblock Symphony models and up to 91% efficiency @ 2ohms per channel on the multi-channel models, making them the top tier of efficiency possible in car audio.




s800/4: 11 1/8" L x 7" W x 2 3/8" Tall

S550/2: 7" L x 7" W x 2 3/8" Tall

S600.1: 6 3/8" L x 7" W x 2 3/8" Tall

S1500.1: 9 5/8" L x 7" W x 2 3/8 Tall

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Product Reviews

Showing reviews 1-10 of 17 | Next

  1. vocals on point! 5 Star Review

    Posted by on 29th Nov 2016

    Running this beautiful amp on my 4 crescendo neo forte 6.5s in my doors in my tahoe, absolutely screams and crystal clear! Love the unassuming size of it as well, small enough to tuck under a seat or a fender well if need be, but I like mine Seen in all its glory running next to my bc5500! Don't hesitate to purchase, does everything it says it does and looks sexy while doing it! Great company to support as well!

  2. Fosgate who ? 5 Star Review

    Posted by on 22nd Jan 2016

    Plenty of power clean look very flexible. it would be nice if there were only 2 different allen wrenches

  3. Great amp 5 Star Review

    Posted by on 22nd Jan 2016

    The only amps I'd go with are right here at Crescendo. Super easy to hook up, nice small footprint and crystal clear signal

  4. terriffic amplifier! 5 Star Review

    Posted by on 16th Sep 2015

    I'm new to using crescendo as this is the first amplifier I had purchased from them. Absolutely crystal clear through my mids and tweeters while also having the efficient class d. Used the LP filter and sounded good as well. Shipping came fast and the crescendo team were excellent in their custom service.

  5. awesome amp 5 Star Review

    Posted by on 12th Jun 2015

    Awesome amp. Can't go wrong with anything crescendo

  6. Very Impressive little Amp! 5 Star Review

    Posted by on 22nd Apr 2015

    I was in the market for a very long time for a new 4 channel amp. I have been running all of my speakers for the last year off of a Sundown SAE 50.4 and was really not getting the power that I was wanting. I then started to do a lot of research and stumbled on this little beauty. The first thing that you notice when you get this amp is its size. This amp is small!! Then after you hook it up you realize that not only does it have amazing crossovers and very good output but at 2ohm this amp is a little monster!! By far the best 4 channel amp that I have ever purchased and will for now on will only run Crescendo Audio!!

  7. Best 4 channel amp on the market, great sound Quality 5 Star Review

    Posted by on 29th Mar 2015

    i was deciding from this amp and the rockford t1000.4
    and as everyone knows that amp is not cheap. i own 2 bc5500 so i thought i give the 800.4 a try. MAN THIS AMP IS THE STUFF!!! so much power for being so small. The Sound quality is amazing.Crystal clear. so Glad i went with it.
    This amp was also Tested on the SMD meter and well outperformed its rated power (another reason why i went with it) i would 100% recommend this amp over any other amp. GREAT JOB CRESCENDO!!

    link to 800.4 amp SMD Dyno testing


  8. best purchase ever 5 Star Review

    Posted by on 28th Dec 2014

    This product is awesome!!!! Great quality and friendly customer service. Highly recommended with 5 stars.

  9. tiny powerhouse 4 Star Review

    Posted by on 12th Dec 2014

    For it's power, this amp is very small. Fits under the driver seat of a 3rd gen ram with room to spare. A couple of the nuts that hold in the RCAs were loose out of the box, but easily snugged back down. The build quality of my BC3500 is at least a couple of notches higher with more solid looking RCAs & metal pot nuts vs plastic on the S800. This amp replaced an arc xdi804 and sounds much more defined. The xdi was clear, but just didn't satisfy me musically and didn't get nearly loud enough to overcome road/engine noise inside the cabin @ freeway speeds. The S800 is rated at over twice the power of the smaller xdi, but it definitely shows in my application. This thing makes my cheap pioneer 6.5" components play with authority now. Not sure how long they can take it, but they seem to be doing just fine. I like the amp overall & I'm happy with my purchase. Thanks Crescendo!

  10. just 5 Star Review

    Posted by on 29th Nov 2014

    Just order this for $225. Pretty excited about it. I'll write a better review when it comes in and I hook 2 pw6's and 2 ft1's to it

Showing reviews 1-10 of 17 | Next

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