Can i run 8 speakees on this?

I currently run six on just 2 channels. Pay attention to the ohm load and properly set gains with a multimeter prior to playing.

What size fuse this amplifier carry

For every 100 watts of RMS power, you will want a 10-15A fuse. So if you have a 1,000RMS watt amp, I would run 125A-150A fuse.

Would this amp be appropriate for skar audio vxi65 360-watt 6.5" 2-way component speaker system?

This is a class A/B 4 channel amp. It works great in your application.

Will this amp power 4 skar audio sk 6x9s good i got 2 skar audio vvx 15s on a skar rp 2000.1d and i don’t want the bass to drown out the voice

Yes, this amp is shouldn't be your concern. I'd be worried about those 6x9s handling this amp. I say that because though I really like Skar I've had no luck with their 6x9s. Good news is I haven't owned these sk 6x9s so you may be in luck. This amp is powering a pair of audiopipe CSL-6904 6x9 & a pair of Infinity KAPPA-93iX 6x9s in my car with a Skar EVL-15 pushed at 1 ohm with an audiopipe 1500w monoblock & fixing to strap it. The clarity of the 6x9s are wonderful at any level.

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🎵 Amplify your drive, own the soundscape.

POWER THAT COMMANDS - Delivers 125W RMS x4 channels at 2Ω for crystal-clear, room-filling sound.
NOISE FREE LISTENING - 105dB signal-to-noise ratio guarantees pure sound without distractions.
WIDE FREQUENCY RANGE - Experience full-spectrum audio from deep 20Hz bass to crisp 20kHz highs.
TAILOR YOUR SOUNDSCAPE - Gain, LPF, HPF, and Bass EQ switches let you customize your audio vibe effortlessly.
BUILT TO LAST PROTECT - 4-way protection circuit ensures durability and safeguards your investment.

The Skar Audio RP-75.4AB is a robust 500W Class A/B 4-channel car amplifier featuring MOSFET power delivery, adjustable gain and EQ controls, and a 4-way protection circuit. It offers 125W RMS per channel at 2 ohms, a wide 20Hz-20kHz frequency response, and a high 105dB signal-to-noise ratio, making it a reliable choice for audiophiles seeking powerful, customizable, and clean in-car audio.

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Manufacturer	Skar Audio
Part number	RP-75.4AB
Item Weight	3.36 Kilograms
Product Dimensions	49.53 x 17.78 x 7.62 cm; 3.36 kg
Is Discontinued By Manufacturer	No
Size	500 Watt Class A/B Four Channel
Material	Aluminum, Steel, Plastic
Voltage	12 Volts (DC)
Mounting Type	Surface Mount
Specification met	FCC
Batteries Included	No
Batteries Required?	No
Item Dimensions LxWxH	49.5 x 17.8 x 7.6 cm

Skar Audio RP-75.4AB 500ワットフルレンジクラス A/B 4チャンネルカーアンプ

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Skar Audio RP-75.4AB 500ワット フルレンジ クラス A/B 4チャンネル カーアンプ

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Skar Audio RP-75.4AB 500ワットフルレンジクラス A/B 4チャンネルカーアンプ