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Authorized dealer · Car Audio Bargain
Absorbed glass mat construction makes AGM car audio batteries a dependable fit for daily-driven systems: sealed, spill resistant and, in 12 volt form, at home on a typical factory charging system. Shop XS Power D, S and XP series batteries alongside Sundown Powersports models from Sundown Audio.
Every battery ships from our North Carolina location, and orders over $250 qualify for free shipping.
In an AGM battery the electrolyte is held in glass mat separators between the plates, so the battery is sealed and will not spill if the case is tipped. That design gives low internal resistance for strong current delivery, good vibration resistance and more mounting flexibility than a flooded battery, though you should still follow each model's mounting guidance. AGM is a forgiving choice for a 12 volt vehicle, since it charges well within a normal alternator's output range.
XS Power D series batteries such as the D375 and D3478 are common choices for the main battery position under the hood. XP series batteries, from the XP750 to the XP3000, are secondary reserve batteries meant to sit near the amplifiers. S series models like the S375 and S975 are built as racing batteries, and the PSX14L, PSX14Q and PSX20Q, along with the Sundown Powersports SPS-950 and SPS-1500, cover motorcycles, UTVs and other compact applications.
Most AGM car audio batteries run at 12V, but this range also includes 16V models such as the D1600, D16-31, S1600 and XP1000. A 16V AGM battery needs a charging system or charger designed for it, and every amplifier and component on that circuit must be rated for the higher voltage. Many builds keep a 16V bank isolated from the vehicle's 12V electrical system.
When you add an AGM reserve battery, match it to the main battery's voltage and chemistry or use an isolator, and run properly sized, fused cable between them. An AGM-compatible charger keeps the bank healthy during storage. Compare lithium car audio batteries if weight savings matter, and see the full electrical range for terminals and fuses. A high-output unit from the alternators collection helps keep a large AGM bank charged, and 1/0 AWG power wire handles the main runs.
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