Can u run 8 speakers on this?

Yes you can. Two speakers per channel in parallel but make sure that the impedence of each speaker is 4 ohms or more because the minimum impedence that this amp can work in a stable condition is 2 ohms. Also keep in mind that each speaker will get around 100-115 watts.

Can i hook up tweeters, two front 90w rms and two 45w rms speakers to this?

I have tweeters on mine with 2 6.5s running in HPF.

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SK-M4004D

Product ID: 33765655

Details

Item dimensions L x W x H
7.9 x 4.64 x
Manufacturer
Skar Audio
Maximum Supply Voltage
14.4 volts
Minimum Supply Voltage
14
Voltage
14.4 volts

⚡400W max power output

📏Ultra compact 7.9x4.6x1.7 in

🎚️Adjustable HPF/LPF/Full-Range crossover

Description

🎵 Small Amp, Big Impact: Power Your Drive with Precision and Style

SPACE SAVVY DESIGN - Ultra-compact footprint fits seamlessly into tight car spaces without compromising power or performance.
POWER MEETS PRECISION - Delivers 140W x 4 channels RMS at 2Ω for crystal-clear, distortion-free sound that commands attention.
TAILORED SOUND CONTROL - Customizable crossover settings (HPF, LPF, Full-Range) let you fine-tune your audio experience like a pro.
BUILT TO LAST PROTECT - 4-way protection circuitry guards against thermal, voltage, speaker, and DC faults for worry-free driving.
PLUG PLAY VERSATILITY - High-level input connections and adapter harness simplify installation—no RCA? No problem.

The Skar Audio SK-M4004D is a compact yet powerful Class D 4-channel car amplifier delivering up to 400W total output. Engineered with a high-speed MOSFET power supply and advanced crossover controls, it offers versatile sound customization and reliable performance in tight spaces. Featuring high-level inputs and robust 4-way protection circuitry, this amp ensures easy installation and long-lasting durability for audiophiles who demand premium sound on the go.

Specifications

ASIN	B01EQX5ORK
Best Sellers Rank	#15,186 in Electronics ( See Top 100 in Electronics ) #21 in Car Mono Amplifiers
Brand Name	Skar Audio
Customer Reviews	4.2 out of 5 stars 475 Reviews
Global Trade Identification Number	00739189979165
Included Components	Skar Audio SK-M4004D Compact Full-Range Class D 4 Channel Amplifier
Item Dimensions	7.9 x 4.64 x 1.65 inches
Item Type Name	Car Amplifier
Item Weight	3.7 pounds
Item dimensions L x W x H	7.9 x 4.64 x 1.65 inches
Manufacturer	Skar Audio
Material Type	Mosfet
Maximum Output Power	400 watts
Maximum Supply Voltage	14.4 volts
Minimum Supply Voltage	14 volts_of_direct_current
Model	SK-M4004D
Mounting Type	Surface Mount
Number of Channels	4
Number of Items	1
Output Power	400 watts
Part Number	SK-M4004D
UPC	739189979165
Unit Count	1 Count
Voltage	14.4 volts
Warranty Description	2 year limited warranty

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