Are these 0gauge inputs or 4gaude?

4 I believe, 4 fit perfect in my sons car.

With this 5 channel amp , can I hook up my highs , tweeters & subwoofers at the same time?

That's the whole point of a five channel amp.

Would this amp be good for 6 speakers i wanna use it for highs

This amp is terrific for miss and highs being a class A/B amp, however your gonna be a channel short but I'm sure there is a wiring diagram through crutchfield you could use to figure something out

Would this amp power 4 6x8s and 1 sub??

I would recommend getting a separate amp for the subwoofer. this amplifier runs hot if you push it at two ohm's. So depending on what kind of rms wattage is needed for the speakers that you are getting it might not work for you. I was running Infinity 6x9s and infinity six and a half with the 4 ohm subwoofer a Rockford fosgate r1. The subwoofers rated at 150 watt RMS and I had no problems with it but I upgraded to a Rockville dual 4 ohm subwoofer running at 2 ohms recommended at 600 w RMS and I cannot power the amp more than halfway on the game without it going into protection mode mode because of overheating. If you decide to bridge your 6x9. This amplifier will not work for you this is why I recommend getting a separate four channel Rockville amplifier. For the 6x9s and a separate Rockville amp for the subwoofer. The amp is a good amp for the price it depends on what kind of sound you are looking for and how loud. I would only recommend using this app in a 4-ohm application not bridged and not any kind of two ohm application

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Rockville dB45 3200 Watt/1600w RMS 4 Channel Amplifier Car Stereo Amp, Loud!!

Product ID: 502246446

Details

Item dimensions L x W x H
49.3 x 22.9 x
Voltage
16 Volts 8 10
Manufacturer
Rockville
Maximum supply voltage
16 Volts
Minimum supply voltage
10 Volts

⚡3200W Peak Power

🔊1600W RMS Output

🎚️Fully Adjustable 12dB/Oct Crossover

2567.44 DT

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Description

🎵 Power your ride with Rockville dB45 — where pro-grade sound meets unstoppable energy!

PLUG PLAY CONFIDENCE - Includes mounting screws, tested power birth sheet, and a comprehensive owner’s manual for hassle-free installation.
ROCK SOLID RELIABILITY - Built-in IC protection, over/under voltage safeguards, and premium MOSFET power supply ensure your amp runs flawlessly.
PRECISION SOUND CONTROL - Fully adjustable 12dB/octave crossover and bass equalizer let you tailor your audio experience like a pro.
UNMATCHED POWER PERFORMANCE - Delivers a thunderous 3200W peak and 1600W RMS for crystal-clear, distortion-free sound that commands attention.
2 OHM STABLE FOR MAXIMUM FLEXIBILITY - Compatible with demanding setups, matching or surpassing top-tier brands like Rockford Fosgate and Kicker.

The Rockville dB45 is a high-performance Class AB 4-channel car amplifier delivering 3200 watts peak and 1600 watts RMS power. Featuring CEA-compliant ratings, fully adjustable crossovers, and advanced protection circuitry, it offers professional-grade sound quality and reliability. Designed for 2 ohm stability and equipped with premium components, this amp competes with top brands, making it the ultimate upgrade for serious car audio enthusiasts.

Specifications

ASIN	B0728K1GD4
Best Sellers Rank	151,339 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 73 in Car Multichannel Amplifiers
Box Contents	Amplifier
Brand Name	Rockville
Customer Reviews	4.4 4.4 out of 5 stars (668)
Item Type Name	Car Amplifier
Item Weight	14.4 Pounds
Manufacturer	Rockville
Manufacturer Part Number	dB45
Model Number	dB45
Number of Items	1
Unit Count	1.0 count

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