the fitment question to answer first
The Excalibur X500.4 is a four-channel car amplifier that works with factory or aftermarket head units, so it can add power without replacing your radio. It supports 4-channel, 3-channel and 2-channel setups, which means you can run four speakers, three speakers plus a sub, or two channels bridged for more bass.
We'd consider it for a simple system upgrade where you want clean power and don't need a separate processor. The RMS rating is the number that matters: 50 watts per channel at 4 ohms, or 2 x 150 watts bridged.
| Product detail | Value to match to your vehicle |
|---|---|
| Product | Excalibur X500.4 2000W 4 Channel MOSFET Power |
| Model | X-500.4 |
| Color | black |
what it will not do
The 2000W figure is peak power, not a continuous rating. Don't expect 500 watts per channel for music. The 50W RMS per channel is the realistic number for matching speakers, and it's plenty for typical door speakers.
It won't fix a poorly matched system or replace proper gain setting. Adjustable high-pass, low-pass, bass boost and gain controls let you tune it, but the amp won't correct for the wrong impedance or a bad ground.
Peak power isn't continuous output; match speakers to the RMS figures
The amp won't add channels or processing your head unit doesn't provide
the current price and what it compares to
- Amazon price
- $109.59
- Customer rating
- 4.3
- Customer reviews
- 431
- Typical price over 90 days
- $159.25
- Difference
- $49.66 (31 percent)
At $109.59, this amp is $49.66 below the typical price over the last 90 days of $159.25. That's about 31 percent off, and it's also the lowest price we've seen for this model across all time.
The rating sits at 4.3 stars from 431 reviews. For a four-channel amp with this RMS output and a compact aluminum chassis, the price is worth a look if the specs line up with your speakers.
power, mounting and connection checks
Before you buy, confirm your speakers and sub can handle the RMS output at their impedance. The amp is stable at 4 ohms per channel and 2 ohms bridged is not listed, so check your sub's final impedance before wiring it bridged.
Plan for a power wire, ground, remote turn-on and RCA or high-level signal. The flat aluminum housing needs airflow because it sheds heat through the case, so don't bury it under a seat or carpet where it can't breathe.
If you want dash control for bass, the optional remote is a separate part. You'll also need to set gain correctly to avoid distortion or noise.
who should choose this amp
Choose the Excalibur X500.4 if you want a compact four-channel amp for door speakers and a modest sub, and you're comfortable setting gain and filters yourself. It fits factory-radio upgrades and aftermarket systems that don't need more than 50W RMS per channel.
Skip it if you need high continuous power for power-hungry components or want plug-and-play tuning with no adjustments. Check your speaker power ratings and available mounting space first, then decide.
Specifications
| Model | X-500.4 |
|---|---|
| Color | black |