Uploaded February 2026 | Updated September 2026, 6 days ago

---

#AmpDyno #Amplifier #Bass
Recoil Audio DI550.4 4ch Car Audio Amplifier
Shop on Amazon: amzn.to/4kc5LrX
Budget Amp Playlist: youtube.com/playlist?list=PLu98-M_EowHMtCIiCz0v6_2gLnsmdLL0V

CHAPTERS
0:00 Intro
0:30 Unboxing
1:30 Features
3:10 Amp Dyno Tests
5:54 Sound Demos
8:39 Adding Subwoofer
9:37 What's Inside?
10:47 PROS and CONS
11:32 Final Thoughts
12:17 EXTRAS

SHOP Affiliates:
Down4Sound - Shop4Bass.com
SAVARD Speakers: Shop4Boom.com (use WAL7 for 7% off)
NVX Car Audio - bit.ly/448kM53
Amazon - amzn.to/3wNX6Fn
Crutchfield - howl.me/cjZI33auToW

Get your WAL/OSS Merch: bigdwiz.creator-spring.com
Buy Me a Coffee/Tea/Slap-a-D-No : oldschoolstereo.com/p/donate.html

➡️ Support OSS / Williston Audio Labs for early access to videos: patreon.com/OldSchoolStereo
One Time "Tip" for Video Support: paypal.me/BigDWiz

VIDEO AND AUDIO GEAR
Camera - iPhone 13pro 1TB - amzn.to/3nCjGvc
RODE Wireless Go II Microphones: amzn.to/3Q6NVHl
Shure MV7 Microphone: amzn.to/3A4OICK
Zoom H4n Audio Recorder: amzn.to/3BXjVsS
960 LED Panel: amzn.to/2Sxoq3S

TEST BENCH EQUIPMENT
SMD / D'Amore Engineering Amp Dyno (AD-1): https://is.gd/wccad1
XS Power D1400 Batteries - amzn.to/2BPFCKW
XS Power PSC60 Charger - amzn.to/2CHGcfs
Fluke 1000A AC/DC Clamp Meter: amzn.to/2Rw5WDA
Handheld Dyno AMM-1: https://is.gd/wccamm1
My Favorite Precision Screwdriver Kit: amzn.to/3yAaPmn

DISCLAIMER: This video and description contains affiliate links, which means that if you purchase from one of the product links, I may receive a small commission. As an Amazon Associate I earn from qualifying purchases. As an eBay Partner, I may be compensated if you make a purchase