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Reference BASS 400
Operation Class Class D
Number of Channels 01
Maximum power @ 13.8 VDC - 2 OHMS: 400 W RMS 
@ 13.8 VDC - 4 OHMS: 214 W RMS
Input Sensitivity RCA: 320mV - FIO: 6V - LEVEL 100%
Signal to Noise Ratio > 90dB
Frequency Response 8Hz to 255Hz (-3dB)
Crossover High Pass (HPF) Variable, 8 to 30Hz (-12dB / 8th)
Crossover Low Pass (LPF) Variable, 55 to 250Hz (-12dB / 8th)
Bass Boost Parametric, 35 to 55Hz, 0 to + 12dB
Efficiency 82%
Input Impedance 10K OHMS (RCA) / 1K OHMS (FIO)
Protection System Thermal and Output Short
Minimum Power Supply Voltage 8 VDC
Maximum Power Supply Voltage 16VDC
Consumption at Rest 0.5 Amp.
Musical Maximum Consumption @ 13.8VDC: 17.5 Amp.
Maximum Sine Signal Consumption (100Hz) 13.8VDC: 35 Amp.
Dimensions (WxHxD) 134 x 42 x 138mm
Weight 0.57 Kg


400 Watts RMS Class D Amplifier

Customer Testimonials


Its 100% the  best place I’ve shopped for my car audio needs big and small always take my calls answer any questions I may have and your quick shipping is absolutely the best!

I rate the value of my purchases a 5! 

Michael Varela

Low Hertz is a lot more than a website. I know I could reach out to them if I needed anything.
No, not just with products. You can always count on quality. But questions about the hobby. Low Hertz is a movement in Car Audio. Where your not judged but helped! So get in the movement with us.
#RepTheMovement #LHCA

Ben Davis

Awesome place. Awesome customer service. Great people and always answer questions and get orders together. Great shipping time. Highly recommended. #1 spot for great service

Nick Brownell

I've been ordering from Low Hertz past few weeks now, I tell you these guys are on point! Fast shipping and the best part is... No Tax! I am a loyal customer and If you don't have the customer service like these guys, then your cut off. I will definitely get more stuff from Team Low Hertz! Thanks again for your hard work!

Johnson Thammavong

Man these guys go above and beyond. the customer service is off the charts.. #LHCA is the way to go.. I love my #LHCA bass knob, and you bet imma rock that #LHCA swag everywhere I go...

David Ebel II

The customer service is world-class!  Zack and his team were super responsive and went out of their way to research and come up with some creative solutions!  The product selection, prices and shipping are some of the best you’ll find anywhere online.  Plus the fitment and ease-of-installation of their products are excellent.

Casey McGehee

The last 3 box designs I've purchase were all 150+ db certified in the lanes, your results may vary depending on vehicle and power but they definitely know what they're doing. Well worth the money !

Eric Feliciano

They designed my husbands box. Came out great. Never a disappointment when it comes to these guys. Definitely will be coming back for another build!

Katie Belluno
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