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🎵 Small Amp, Big Impact — Elevate Your Ride’s Sound Game!
The SounDigital 400.4 EVO is a compact yet powerful 4-channel Class D car amplifier delivering up to 400 watts RMS. Engineered in Brazil, it offers versatile speaker configurations, high efficiency (82%), and exceptional audio clarity with low distortion and high damping factor. Its small footprint and durable design make it the go-to choice for audiophiles seeking premium sound without compromise.
| ASIN | B09BZ8PNVR |
| Best Sellers Rank | #7,547 in Electronics ( See Top 100 in Electronics ) #10 in Car Multichannel Amplifiers |
| Brand Name | SounDigital |
| Customer Reviews | 4.5 out of 5 stars 345 Reviews |
| Included Components | 1 |
| Item Dimensions | 4.33 x 4.33 x 1.97 inches |
| Item dimensions L x W x H | 4.33 x 4.33 x 1.97 inches |
| Manufacturer | SounDigital |
| Material Type | Electronic Components |
| Maximum Supply Voltage | 16 Volts (DC) |
| Minimum Supply Voltage | 8 Volts |
| Model | 400.4 EVO 4.0 |
| Mounting Type | Speaker |
| Number of Channels | 4 |
| Output Power | 400 Watts |
| Package Type Name | Box |
| Part Number | SD 400.4 EVO 4.0 |
| Specification Met | FCC |
| Supply Current | 39 Amps |
| Unit Count | 1.0 Count |
| Voltage | 8 Volts (DC) |
P**L
Sound Digital, Game changer!
9-17-25 I give this very tiny lil amp 5 stars so far!! I actually am using it passed thru my Fosgate RX500D amp....It is clean no humming no no hissing in the 2 RF P3 speakers I have in my back dash. I totally played myself by purchasing the Boss CE102 to drive the P3s which was an absolute disaster...that amp is so terrible it pushed interference thru my P3s and my 12" Kicker sub...I thought it was my grounds, RCAs, etc until I started process of elimination. SD EVO is clean and crisp and very small so concealing it is very easy...my only gripe is the speaker terminals are right next to the power terminals but they obviously did some expert engineering...again the lil thing sounds clean.
F**N
Small and powerful
This little lamp kicks butt! My aftermarket head unit wasn't quite cutting it for me, I found myself driving around with it cranked to the max all the time. It was rated it 60 watts per channel mute I'm sure that's Max, RMS was probably more like 15 watts. This amp was small enough for me to install it in the dash behind the head unit so wiring it to the factory harness was super simple. I'm using it to run four Skar Audio 6x8 4 ohm speakers in my Ford f150 so, according to the specs, it should be producing 66 wats per channel. I found it to be a little to powerful so I turned the gain down a bit to give me more precise volume control and I still don't need to turn it up to more than 1/2 to 3/4 volume to make my ears hurt. I am very pleased with this purchase as it does everything I needed it to do and then some. Great value for the money.
A**.
Great amp for the price
Very powerful and durable. I was very impressed by how well it works and this amp is very underrated
W**?
Tiny and powerfull
I was hesitant at 1st because I'm old school and back in the day if you wanted power, You needed size. Not anymore apparently. After reading reviews and seeing dyno results I gave this tiny Amp a try. It didn't disappoint me. Putting out a true 65 watts per channel rms. I have it powering my 2 6 1/2 door speakers and 2 4" and 2 4x6 in the rear. Plenty to get the speakers moving. No clipping or engine noise. If your looking for a small Amp that will be enough to power your mids and highs, this Amp is perfect. Knowing the size I can and will use on my next motorcycle system
C**S
Execelente
Execelente
G**Y
Tiny but mighty
This amp hits for being so small. It does have a little buzz at low volume. But not when playing music. Very happy with the performance. Pushes my 6x9s that can handle 120 watts with ease, and gain is lowered so I don't burn them out.
I**A
Sensacional
Gran calidad/precio instale el sonido en mi carro y suena muy bien tiene gran potencia solo tiene la mitad de volumen y suena muy fuerte
L**N
Good job
I appreciate the fast delivery and the item is very good
A**O
Muito bom
Produto bom uso bastante
P**5
Sd400.4
Fonctionne correctement super ampli
J**O
Muy compacto
Muy potente y compacto me gustó trabajando diario ya por medio año
O**R
great mini amp. powerful for its size.
these work well in all applications. I have them in a few cars and they push more power than amps of much bigger size.
P**I
Perfetto
È piccolo ma potente sono felice per il mio acquisto
Trustpilot
3 days ago
1 month ago