Alpine's EV-Series PXE-X121-12EV is a 12-channel DSP amplifier designed around the Tesla Model 3 and Model Y. Here's how it connects, what US owners report after installing it, a spec discrepancy worth knowing about, and the India MRP.

What the JL Audio Stealthbox listed for the Grand Vitara is, where its side pod sits, why hybrid versions change the amplifier choice, and what to confirm before ordering.

What the JL Audio Stealthbox listed for the Mahindra Thar is, why its catalogue photo and listing differ, how open-top driving affects bass, and how to protect and power it.

What the JL Audio Stealthbox listed for the Hyundai Creta is, where it sits in the boot, how to feed it from the factory touchscreen system, and what to confirm before ordering.

What the JL Audio Stealthbox listed for the Toyota Hilux is, why it sits behind the rear seat, what the catalogue render does and doesn't confirm, and how to choose an amplifier for it.

A look at the JL Audio Stealthbox listed for the Suzuki Jimny: what the catalogue photo shows, what isn't confirmed, how it fits a narrow boot, and how to power it.

What the JL Audio Stealthbox listed for the Toyota Fortuner is, what the catalogue does and doesn't confirm, where it sits in a seven-seater, and how to power it.

Morel IP-BMW42 review: 4-inch direct-fit component speakers for BMW and MINI. 50W RMS, MT100 handcrafted silk dome tweeter, plug-and-play install with factory harness.

Morel IP-BMWSUB82 review: an 8-inch direct-fit under-seat subwoofer for BMW vehicles. 180W RMS, EVC motor, neodymium magnet, plug-and-play install with factory amp.

Morel IP-SUZ62 review: a true plug-and-play 6.5" component speaker upgrade for Maruti Suzuki vehicles — 90W RMS, 92 dB sensitivity, A-pillar tweeter mounting, no labor surprise.

Morel IP-HYU6C review: a true plug-and-play 6.5" coaxial speaker upgrade for Hyundai and Kia owners — 80W RMS, 91 dB sensitivity, vehicle-specific wiring included.