MSRP: $3,889.99
(You save $1,240.00 )
(9 reviews) Write a Review
Adding to cart… The item has been added

Crescendo BassClef BC-17k


As some enthusiasts have already heard through the grapevine, we are pleased to announce the new BassClef series.

The current Bass Clef series has had a hell of a run since 2011, but it is time to raise the bar once again with all good things.

The Crescendo Bass Clef models range from 4kw to 17kw. The first models to hit the market will be the BC-4k and BC-6k, followed by the BC-8kBC-13k, and BC-17k.


All new BC amplifiers utilize a newly tooled Crescendo heatsink and revamped circuit boards that stay true to our standards, with even higher power-per-square inch and resilience than before. This amplifier is Stable down to .5 ohm on sufficient electrical; this amplifier can also handle up to 16.5v.


Newly designed, custom tooled, proprietary Multi-piece Thermal optimized Heatsink with patent-pending interlocking slide-out CNC engraved top plate. 

This amplifier features a 2 stage copper anodized Top Plate that is easily removable for those who want to color match their show quality installations.

Silver-plated & hard-wired Tiffany RCA inputs 

Two sets of oversized 1/0 Power/Ground Inputs for efficient current transfer.



Dual 4 gauge Speaker output terminals! Which each terminal containing two outputs contains the same polarity for extreme ease of use! ( + + ) & (- -)


Overbuilt Power supply with heavy copper traces and Military spec PCB/heavy duty standoffs for extreme vibration resistance.

The BC series features a Handwound heavy-duty transformers & inductors to ensure no windings from excessive vibration.


They are manufactured using some of the highest quality and most reliable electrical components, with many 3% tolerance components. 


Full 4-Stage Intelligent Protection Circuitry 


1 Year/1ohm comprehensive warranty with 2 year

.5ohm optional extended warranty available.

Crescendo BassClef BC-17k POWER:

Power Ratings (clean power RMS @13.8v) protects @ 16.5v

  • 1ohm: 17000w
  • 2ohm: 8500w
  • 4ohm: 4500w

Dimensions: 39.5" Length (between mounting brackets) x 12.5" Width x 3" Height

9 Reviews Hide Reviews Show Reviews

  • 3

    Posted by garrett evans on Dec 19th 2021

    the amp came with a decent size dent on the bottom side of the front face plate but besides that it came really fast and they had really good service

  • 5
    Power house!!

    Posted by Chris parado on Aug 4th 2021

    Got this 17k pushing 2-15” DC LV6.And its pushing my subs like never before.and my truck is flexing in area that’s not suppose too. Bassclef17k 100%

  • 5
    crescendo bc 17k

    Posted by Dondi on Apr 26th 2021

    I got this beast pushing 2 resilient sounds team 18's at 1ohm in a 2006 h3 hummer and it pushes them very well. I haven't clamped it but my voltage is above 14 to 14.8. Down4sound is my number one go to for stereo needs.

  • 5
    Nendo 17k

    Posted by Dontrail dawson on Feb 12th 2021

    10/10 highly recommend I wouldn’t hesitate buying from down for sound

  • 5
    Beautiful Monster

    Posted by Aaron J Kilgore on Aug 8th 2020

    Great amp does really well and its beautiful. Running 3 Crossfire xsv4 15s. 160ah of lto 159.5

  • 5
    Very nice well built amplifier

    Posted by Luis on Jun 22nd 2020

    Ordered one of these 17ks and man im so happy with the power this thing is putting out at .5ohm its a bad @ss amp i would reccomend it to anyone looking for a big. Korean amp very good price for the power your getting. This things is putting in major work on my 4 hdx3 15s flat wall super happy, best amp i ever owned.

  • 5

    Posted by ANTONIO PHILLIPS on Aug 9th 2019

    Must have strong electrical for this amp. This amp is a beast. A must have

  • 5
    Savage Power!!

    Posted by Mike Mann on May 16th 2019

    I clamped this amp at 12,131 watts on (2) ZV.5 15" at the NSPL show last weekend. I run in the 25-48 no wall class and got a 155.4 before the windshield blew and I lost cone control so the ZV5 went shortly after! They were wired at 1ohm with .7 of raise so the ratings are true on power. Be cautioned this thing needs lots of power. Had it on two limitless 45ah and two banks of Maxwell caps powered by a CES 270 and the voltage wouldn't hold. Added another 45ah and bank of caps and will play a 30 second music run before tanking.

  • 5
    Crescendo audio bc 17k

    Posted by Austin Kirk on May 15th 2019

    Man this amp is a work of art. She has all the right curves in all the right places. Best money I've ever spent