Crescendo Audio


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MSRP: $3,889.99
— You save $1,140.00

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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

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14 Reviews

  • 5
    Crescendo 17k amplifier

    Posted by Dan Miller on Mar 24, 2022

    great and Huge Amplifier. arrived fast. good instructions. come with a remote and clip indicator. I got a free T-shirt with my order !

  • 5
    Amazing service

    Posted by Collin on Mar 21, 2022

    The amp arrived 2 days from order date, and package was only slightly damaged. The interior box holding the amp was in excellent condition and everything is great! All the extra goodies are awesome as well. I'll use Down4Sound for all my purchases now

  • 5
    Best company

    Posted by Jeremy on Mar 18, 2022

    Best in the

  • 5
    Crescendo BC17K

    Posted by Jamie Belcher on Mar 04, 2022

    Absolutely massive can't wait to hook it up great quality

  • 5
    Crescendo 17k

    Posted by Kevin on Mar 04, 2022

    Absolutely massive more than I ever hoped for

  • 3

    Posted by garrett evans on Dec 19, 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 04, 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 26, 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 12, 2021

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

  • 5
    Beautiful Monster

    Posted by Aaron J Kilgore on Aug 08, 2020

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

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