Will 9 volts hurt an amplifier with rca inputs rated at 4 volts? do you just lower the gain on the amps? the amps are alpine 50 watts x 4 channels.

This will not hurt the amplifier. The output voltage is not a full time constant 9v.

does this come with as bass knob

No, but you can adjust the signal level going into your subs from this crossover.

este producto es chino?

Es chino pero la verdad es de muy buena calidad es muy buena marca reconocida en latino america

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EX4.6 PRO 4 Way Electronic Crossover 4 in 6 RCA Output 9V RMS Car Audio

Product ID: 364733944

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⚡Bass boost up to +12dB at 45Hz

🔊9V RMS max output power

🎚️4-way electronic crossover precision

Description

🎵 Elevate your ride’s soundtrack with pro-level crossover precision!

POWERFUL 9 V RMS OUTPUT - Drive your car audio system with robust 9V RMS output ensuring dynamic, distortion-free sound at every volume.
CUSTOMIZABLE BASS BOOST - Elevate your low-end with adjustable bass boost up to +12dB at 45Hz—feel every beat like never before.
ULTRA CLEAN SIGNAL PROCESSING - Experience pristine audio clarity with >90dB signal-to-noise ratio and <0.02% harmonic distortion for professional-grade sound.
PRECISION 4 WAY CROSSOVER CONTROL - Seamlessly tailor your sound with dedicated high, mid-high, mid-low, and subwoofer channels for crystal-clear audio layering.
USER FRIENDLY QUICK ON OFF SWITCHES - Instantly toggle each channel on or off with dedicated buttons—perfect for on-the-fly sound customization during your drive.

The PRV AUDIO EX4.6 PRO is a compact, 4-way electronic crossover designed for car audio enthusiasts seeking precise frequency control and powerful output. Featuring 9V RMS max output, adjustable bass boost up to +12dB at 45Hz, and ultra-low distortion, it delivers clean, customizable sound across four dedicated channels. With quick on/off switches and a Butterworth 12dB/octave slope, this USA-made unit ensures professional-grade audio tuning for the ultimate in-car listening experience.

Specifications

Product Dimensions	3.3 x 22.86 x 16 cm; 730.28 g
Item model number	EX4.6PRO
Country of Origin	USA
Item Weight	730 g

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