Is 80 watts RMS per channel enough for door speakers?

Yes for most aftermarket coaxial and component speakers, which typically handle 50 to 100 watts RMS. It is a modest step up unless your speakers are inefficient or you bridge channels.

Can I bridge it to run a subwoofer?

Yes. Bridging pairs of channels combines their output into two stronger channels, enough for a small sub. Check the bridged impedance rating before wiring a low-ohm sub.

Will it work with my factory radio?

Yes. It has speaker-level high-level inputs, so it can take signal from a stock head unit without a separate line-out converter.

Does it need a separate remote turn-on wire?

It needs a switched 12-volt remote signal like most amps. If your radio lacks a remote output, use a fused ignition-switched source.

Expect the amplifier and its mounting hardware. Power and speaker wiring, fuses and a line-out converter are usually sold separately.

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This hour's deals

Belva BXA6404 640W Peak BX-Series 4-Channel Car Audio MOSFET Amplifier

−69%

Tech · SonicElectronix.com

Four channels of car audio muscle for the bass-head in your life

Name: Belva BXA6404 640W Peak BX-Series 4-Channel Car Audio MOSFET Amplifier
Brand: Belva
Availability: InStock

Belva BXA6404 640W Peak BX-Series 4-Channel Car Audio MOSFET Amplifier

A 640W peak four-channel MOSFET amplifier for anyone building a serious car sound system.

Deal score 7.6 · Steal

$62.99$200.00 SonicElectronix.com's regular price

You save $137.01 at SonicElectronix.com

Deal.ai's agents found this deal on November 11. The store may have changed its price since.

Why it's a great deal

SonicElectronix.com lists its regular price at $200.00: 69% off by its own figures

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Reading SonicElectronix.com’s product page for the details…

Specs

Number Of Channels: 4
Amplifier Class: Class A/B
Bridgeable: Yes
Connection Type: Wired
Depth: 11.02"
Height: 2.00"
Width: 7.48"
Output Channel Quantity: 4
Preamp Output: No
RMS Power Rating: 80 watts x 4 channels (4 ohms)

About the Belva BXA6404 640W Peak BX-Series 4-Channel Car Audio MOSFET Amplifier

The Belva BXA6404 is a Class A/B four-channel car amplifier rated at 80 watts RMS per channel at 4 ohms, with a 640-watt peak total. It runs a MOSFET power supply, handles speaker-level inputs, and has variable high-pass, low-pass and bass-boost controls, so it can drive four speakers or bridge to two channels for more power. It suits budget system upgrades where a factory radio needs a real power boost. Against Class D rivals it runs hotter and draws more current, and it lacks preamp outputs for chaining a second amp, but buyers rate it well as a low-cost way to add clean power.

Best forBudget four-speaker system upgradesPowering front and rear speakers from a stock head unitBridging two channels to drive a subwooferFirst-time amp installers

Pros

80 watts RMS x 4 at 4 ohms is solid power for the money
Speaker-level inputs let it work with factory radios
Variable high-pass, low-pass and bass boost give real tuning control
Bridgeable to two channels for a sub or more headroom
96 dB signal-to-noise and 0.05% THD are clean figures for the class

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