Can this amplifier push 4 orion hcca 6.5" 1400 watts speakers?

Yes sir connecting one speaker per channel

What size spayed connectors can be used on the screw terminals

I used 8 Guage wires with u connectors

How do I set the 'level' knobs with a multimeter?

if you want to use a multi meter all you have to do is to find a chart that has the output voltage (VAC) for the desired output wattage and play a 1000hz tone with the deck set at 3/4 volume. Adjust the knobs until the desired output voltage is reached. That's how I set all of my amps on my motorcycle. I purchased the TS440 which is very similar. An o-scope would let you know if the signal is clipping but using a multimeter is a tried and true method that's good enough for most users.

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Taramp's TS400X4 4-Channel 400W Class D Car Audio Amplifier, 2 Ohm, Metal

Product ID: 364866666

Details

Item dimensions L x W x H
12.1 x 4.9 x
Manufacturer
rca
Maximum Supply Voltage
5 Volts
Minimum Supply Voltage
8 Volts
Voltage
16 Volts

⚡400W RMS max power

🔊4 full-range channels

🛡️Thermal & short-circuit protection

€ 173.30

Duties & taxes included

In stock

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Description

🔊 Unleash epic soundwaves with the TS400X4 — small amp, massive impact!

BUILT TO LAST - Equipped with advanced thermal and short-circuit protection to keep your system safe and your beats uninterrupted.
COMPACT VERSATILE - Sleek surface-mount design fits effortlessly in any vehicle, from sleek sedans to rugged Harleys, without sacrificing power.
POWERHOUSE PERFORMANCE - Delivers a robust 400W RMS at 2 ohms for crystal-clear, room-filling sound that commands attention on every drive.
PRO GRADE INSTALLATION - Designed for expert setup ensuring optimal performance and reliability — because your sound deserves nothing less.
PRECISION AUDIO CONTROL - Full-range frequency response (18Hz-30kHz) with adjustable crossover settings for tailored soundscapes that match your vibe.

The Taramps TS400X4 is a high-performance Class D car audio amplifier delivering 400 watts RMS across 4 full-range channels at 2 ohms. Compact yet powerful, it features adjustable crossovers, thermal and short-circuit protection, and is engineered for professional installation to maximize sound quality and system safety. Perfect for audiophiles seeking crisp, immersive sound in any vehicle.

Specifications

ASIN	B07YVMJFB9
Brand Name	Taramp's
Customer Reviews	4.4 4.4 out of 5 stars (1,805)
Item Dimensions	12.1 x 4.9 x 13.8 Centimeters
Item Highlight	Bridgeable outputs, built-in HPF/LPF crossovers and RCA inputs provide flexible system design and precise sound tuning
Item Weight	449 g
Manufacturer	rca
Material Type	Metal
Maximum Output Power	400W
Maximum Supply Voltage	5 Volts
Minimum Supply Voltage	8 Volts
Model Number	TA-TS400X4
Mounting Type	Surface Mount
Number of Channels	4
Number of Items	1
Number of Packs	1
Output Power	400 Watts
Package Type Name	Box
Part Number	TA-TS400X4
Specification Met	FCC
UPC	309271196604
Unit Count	1 Count
Voltage	16 Volts

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