will this work to drive a 2 way speaker? or does it have built in cross overs so that it can only drive a sub?

It has a LPF of 30hz-150hz. Most 2ways have a frequency response in the 80hz-20khz range so you'd loose almost the entire frequency range. This is meant for a small subwoofer. I used it to power an Alpine S-W8D4 for a little while but upgraded the sub and amp as it was lackluster.

What size AMP install kit do you recommend? (8/10/12) gauge?

I used 8gauge but it doesn't fit well, so I'd go 10 or even 12. It's a great little amp though, has been powering my Alpine S-W8D4 well

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Description

⚡ Compact power, colossal impact — own the soundscape.

RAPID FIT READY - Compatible with Critical Link Rapid kits for the fastest, hassle-free installation—get your system live in no time.
SLEEK STEALTHY - Matte black finish blends into any environment, perfect for professionals who value both style and substance.
SPACE SAVVY DESIGN - Ultra-compact dimensions make installation seamless, fitting effortlessly into any setup without compromise.
EFFICIENT CLASS D TECH - Advanced Class D amplification ensures maximum power with minimal heat and energy consumption—smart and sustainable.
POWERHOUSE PERFORMANCE - Delivers a robust 400W RMS at 1 ohm for crystal-clear, high-impact sound that commands attention.

The Vibe Powerbox Micro Mono Amplifier packs a mighty 400W RMS output into an ultra-compact Class D design, optimized for quick installation and efficient power delivery. Perfect for professionals seeking high-performance audio with minimal footprint and maximum style.

Specifications

Item dimensions L x W x H	150 x 300 x 60 Centimeters
Voltage	12 Volts
Manufacturer	VIBE
Maximum Supply Voltage	12 Volts
Mounting Type	Surface Mount
Brand	Vibe
Number of Channels	4
Output Power	4E+2 Watts
Package Type Name	tray or tray-style box
Specification Met	Iso
Supply Current	33.33 Amps
Global Trade Identification Number	05060382797160
Model number	POWERBOX400.1M-V7
Colour	Black
Number of Memory Sticks	1
Item Weight	700 g
Product Dimensions	150 x 300 x 60 cm; 700 g
Item model number	POWERBOX400.1M-V7
Item Height	60 Centimeters
Item Width	300 Centimeters
Channels	Mono
Wattage	400 Watts
Output Wattage	400 Watts
Power Source	Battery Powered
Included Components	Manual
Are batteries included?	No
Maximum Speaker Output Power	800 Watts

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