--- product_id: 161950268 title: "KS 125.4 Mini 4-Channel Amplifier" brand: "arc audio" price: "VT181848" currency: VUV in_stock: true category: "Arc Audio" url: https://www.desertcart.vu/products/161950268-ks-125-4-mini-4-channel-amplifier store_origin: VU region: Vanuatu --- # Class G/H analog switching tech 4 channels, 125W @ 2Ω Multi-layer protection system KS 125.4 Mini 4-Channel Amplifier **Brand:** arc audio **Price:** VT181848 **Availability:** ✅ In Stock ## Summary > 🎶 Small amp, big impact—unleash your ride’s true sound potential! ## Quick Answers - **What is this?** KS 125.4 Mini 4-Channel Amplifier by arc audio - **How much does it cost?** VT181848 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/161950268-ks-125-4-mini-4-channel-amplifier) ## Best For - arc audio enthusiasts ## Why This Product - Trusted arc audio brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact Powerhouse:** Sleek mini chassis fits perfectly in tight vehicle spaces without sacrificing output. - • **Seamless Integration:** Hi/Low level balanced RCA inputs and auto-sense turn-on make hooking up to OEM systems effortless. - • **Pure Analog Class G/H:** Experience warm, distortion-free sound with efficient analog switching—no digital artifacts here. - • **Flexible Load Handling:** Stable down to 2-ohms and capable of driving highly reactive speaker loads for versatile setups. - • **Rock-Solid Reliability:** Built-in safeguards guard against reverse voltage, speaker shorts, and thermal overload for worry-free drives. ## Overview The Arc Audio KS 125.4 Mini is a compact 4-channel amplifier designed for small vehicles, delivering up to 125 watts per channel at 2 ohms with a non-digital Class G/H switching design. Engineered for durability, it features comprehensive protection against electrical faults and thermal overload, plus flexible input options and stable operation down to 2-ohms, making it an ideal upgrade for audiophiles seeking powerful, clean sound in limited spaces. ## Description Arc Audio KS 125.4 Mini 4-Channel Amplifier Compact Chassis Design For Small Vehicle Applications. Non-Digital Class G/H Switching Design. Designed By Robert Zeff. Protection Against: Reverse Voltage, Over Voltage, Speaker Short, and Thermal Overload. Can Drive Highly Reactive Loads. Hi/Low Level balanced Switchblade RCA Inputs For Flexible Integration Into Most Applications. Optically Isolated Mosfet Power Supply. Stable To 2-Ohms. The KS 125.4 Mini Uses a Patent Pending Auto-Sense Turn-On Circuit That Offers a Significant Improvement in Reliability and Operation. To Further Simplify OEM Integration The KS 125.4 Mini Uses A Fully Balanced Input Stage That is Switchable Between Speaker And RCA Inputs. Simply connecting the Stock Speaker Wires to the RCA inputs Will Supply a Perfect Clean Signal To The Amplifier And Turn It On. In Addition, The Remote Turn-On Connection, With The Flip Of A Switch Becomes A Remote Turn-On Output To Connect The Rest Of Your Amplifiers. Specifications - 4 - Channels @ 4 Ohms - 75 Watts 4 - Channels @ 2 Ohms - 125 Watts 2 - Channel @ 4 Ohms (Bridged) - 250 Watts Frequency Response - 20Hz - 20kHz Crossover Range - 40Hz - 550Hz Bass Boost - +15dB @ 45Hz S/N Ratio - 109dB Input Sensitivity (Low) - 220mV - 3.5V Max Current Draw - 51A @ 500 Watts 1% THD Idle Current - 1.14A Fuse - 2 x 30 Amp Dimensions - 11.625"(L) x 5.125"(W) x 1.75"(H) ## Features - Arc Audio KS 125.4 Mini 4-Channel Amplifier - Compact Chassis Design For Small Vehicle Applications. - Non-Digital Class G/H Switching Design. - Protection Against: Reverse Voltage, Over Voltage, Speaker Short, and Thermal Overload. - Can Drive Highly Reactive Loads. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07JJ2QGMH | | Best Sellers Rank | #226,095 in Electronics ( See Top 100 in Electronics ) #554 in Car Multichannel Amplifiers | | Brand | Arc Audio | | Date First Available | December 16, 2008 | | Is Discontinued By Manufacturer | No | | Item Weight | 4.6 pounds | | Item model number | KS-125.4-Mini | | Manufacturer | ARC Audio | | Manufacturer Part Number | KS-125.4-Mini | | Model | KS-125.4-Mini | | Product Dimensions | 9.75 x 15.25 x 17 inches | | Voltage | 3.5 Volts | ## Images ![KS 125.4 Mini 4-Channel Amplifier - Image 1](https://m.media-amazon.com/images/I/31SpcbhForL.jpg) ![KS 125.4 Mini 4-Channel Amplifier - Image 2](https://m.media-amazon.com/images/I/31l0gQFSJ8L.jpg) ![KS 125.4 Mini 4-Channel Amplifier - Image 3](https://m.media-amazon.com/images/I/41mvvp96laL.jpg) ## Frequently Bought Together - Arc Audio KS 125.4 Mini 4-Channel Amplifier - RECOIL RCI23 100% Oxygen Free Copper 3ft 2-Channel RCA Audio Cable, Twisted Pair with Noise Reduction - HOSONGIN RCA Y Splitter Cable, 1 Male to 2 Male Audio Cables (2 Pack), 12 Inch, 24K Gold-Plated, Cotton Braided, Shielded Subwoofer Cable for Amplifiers, TV, Home Theater, Hi-Fi Systems --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vu/products/161950268-ks-125-4-mini-4-channel-amplifier](https://www.desertcart.vu/products/161950268-ks-125-4-mini-4-channel-amplifier) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-10*