SKU: 33772168104

Crescendo Audio - BassClef 4K

Sale price$675.00 Regular price$750.00
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Ships within 48 hours · Estimated delivery Jul 23 - Jul 28

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Description

Crescendo Audio - BassClef 4KAs some enthusiasts have already heard through the grapevine, it is our pleasure to announce the new BassClef series. The current Bass Clef series has had a hell of a run since 2011, but with all good things, it is time to raise the bar once again. The 2018 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 8k, 13k and 17k. All new BC amplifiers utilize a newly tooled Crescendo

As some enthusiasts have already heard through the grapevine, it is our pleasure to announce the new BassClef series.

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

The 2018 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 8k, 13k and 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.

Stable down to .5 ohm on sufficient electrical.
Up to 17v capable.
Newly designed, custom tooled, proprietary Multi-piece Thermal optimized Heatsink with patent pending interlocking slide-out CNC engraved top plate.
2 stage copper anodized Top Plate that is easily removable for those who want to color match to their show quality installs.
Silver plated & hard-wired Tiffany RCA inputs
2 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.
Handwound heavy duty transformers & inductors to insure no shorting of the windings from escessive vibration.
Manufactured using some of the highest quality and most reliable electrical components, with many 3% tolerance components throughout.
Full 4-Stage Intelligent protection Circuitry

Power Ratings (clean power RMS @13.8v)

1ohm: 4000w
2ohm: 2000w
4ohm:1200w
Certified Amp Dyno results (on electrical consisting of Mechman 370a alternator, 8 HPL75 AGM batteries, 3 runs of Crescendo 1/0 OFC cable runs Front to back)
.5ohm: 5710w @13.1v
1ohm: 4416w @ 13.3v
2ohm: 2529w @ 13.4v

Dimensions: 23 3/4" x 9 1/8" x 2 7/8"

(25" length from tip of terminal block to RCA tip)

Shipping Notes
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Exchange/Return Notes
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SKU: 33772168104

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4.3 ★★★★★
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Sinatra2002
Lowell, US
★★★★★ 5
Solid!
Style: AVR-X3800H
It's a rock-solid receiver with modern and future-proof features. Denon isn't the flashiest or most aesthetically pleasing design; however, the unit is reliable and sounds great. I used Dirac Live to fine tune the system, and it's been a worthwhile upgrade from my X-2700. 
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Reviewed in the United States on July 15, 2025
O
Verified Purchase
OldE5
Los Angeles, US
★★★★★ 1
DOA
Style: AVR-X3800H
It was Dead On Arrival. It powered on for a few seconds, then powered off. I sent it back.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 19, 2026
J
James
Lexington, US
★★★★★ 5
Never would have known it was a refurbished AVR
Style: AVR-X3800H
Unit arrived as in new condition. No flaws and complete.
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Reviewed in the United States on February 13, 2026
R
Verified Purchase
Robert Mech
Omaha, US
★★★★★ 5
Great replacement to my older 5.1 Yamaha receiver.
Style: 7.2 Receiver
Great replacement for an older Yamaha. My previous unit lasted 10 years and I see no reason why this new one wont last another 10. Familiar features and setup to other Yamaha receivers. Zero issues with setup and contrary to others, you can use all the features without the app. While the app does add some features for streaming, the unit is fully usable as a receiver for movies, surround, etc. without the app. Overall the sound improvement is spectacular, the high slew rate really makes a difference and DSP much improved over the older 10 year old unit I had. Solid hardware, solid setup and while I'm not about Brand Loyalty, the Yamaha still had better features, reviews and quality than the other major brands. I would have no issue recommending this to unit to anyone. Remember, these units are about the sound they offer, not the the wiz bang features you see in some other units. Reliable hardware, reliable sound and a rich feature set makes this unit a no brainer.
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Reviewed in the United States on January 1, 2026
E
Verified Purchase
EDominguez
Boise, US
★★★★★ 5
Great receiver for money!
Style: 7.2 Receiver
I got this to replace my lackluster Onkyo TX-NR6050 I purchased from Costco. Three areas stand out for me with the Yamaha receiver: 1: Audio, movies sound great, dialogue is clear. Action scenes are impactful and dynamic. 2: Picture quality, bright, vibrant and beautiful colors from my PC and from my Firestick. 3: Ease of use, out of the box ready to go. Menu is dated (no gui really just an overlay, which is fine by me). Renaming inputs, adjusting speaker settings and setting EQ preferences super easy. Took about 20-25 minutes to fully setup. In those 20-25 minutes I was already way ahead of the Onkyo. Great value for the price! Volume is very easy to set! Still have to test PS5 performance, Bluetooth connectivity, USB settings, WiFi and a few other items. I’ll probably end up buying a Blu-ray player since this was so easy to setup! Or maybe use my PS5/Xbox One :)
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Reviewed in the United States on October 15, 2025

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