4PCS Heavy-Duty Brass Amp Input Reducers 1/0 Gauge to 4 Gauge - Durable Amp Connectors with Heat Shrink Tubing for Car Audio Accessories

Definitely use a set of these (in the right size for your amp wiring points) they fit right in for mine and work great definitely perfect for if you want a super solid connection without worrying about the wires touching being shoves directly in the amp holes. Do it with these or get the metal aglets for the wires. Easy to use and looks decent and hold pretty dang tight. For the price they work good and comes with extra goodies like shrink wrap and wire ties and such.

Works amazing great product great quality highly impressed very durable easy to install great value for the money

Must have in amp install

We used these on a 4CH amp running 1/0 froma a distribution block (1/0 is unnecessary for a full range amp) because we had more 1/0 than #4. With a kit of ferules the install results where proper.

These amp input reducers feel very solid and heavy, and the brass finish looks/feels high quality. The set screws and included heat shrink make it easy to get a clean, professional-looking connection. That said, they’re much longer than I expected, and in a tight-space build (small amp rack / compact mounting area), they stuck out too far for me to use. They might be perfect if you have more room to work with, but for my setup, I ended up going a different route (ferrules + heat shrink) to keep everything compact and neat. Pros: sturdy, quality feel, nice included heat shrink Cons: too long/bulky for tight spaces

Works good with my amplifier. It is easy to use and holds the wire really well

Does exactly what it’s intended to. Quality product and will meet expectations.

Good product well described the tips or kinda long if you’re using them on an amplifier but a really good product for shipping