Question 1

Can i run 1&2 for twitters, 3&4 for front speakers, 5&6 for rear speakers and line out for sub ?

Accepted Answer

Watch this YouTube video. I have a D-6.1200 and a LC-1.800 configured similar to the way you want. https://youtu.be/cj9T47VkPZ8

Question 2

is this amp class ab or d?

Accepted Answer

Class D

Question 3

can this amp be ran at 4ohms on channels 1-4 and bridge down to 2ohms for the sub.  Or does it all have to have the same impedance ??

Accepted Answer

No. Bridging up to 3 channels all at 4 ohms and 400 rms per bridged channel.

Question 4

I heard you can run active component speakers. How would you go about running tweeters active with such high wattage?

Accepted Answer

Re: Rusty is a jerk 
While I got a good laugh out of this simple but poignant statement, I believe those who falsely lead others with information they either made up or don’t actually understand is the true jerk. While Rusty was harsh in his response, it was accurate, which is preferable to a kind but false one. 
Active crossovers use much more accurate digital cutoffs that don’t have the impedance shifts problems of passive ones. Additionally passive crossovers USE power, which would be compounded by a less powerful amplifier such as the one in the head unit. Tweeters are amplified regardless if the amplifier is in the head unit or external, and while using a more power amplifier may sound dangerous, an under powered speaker (tweeter, woofer, etc) that is driven to the point of distortion to achieve sufficient volume is the most common type of damage. 
Furthermore, I have never seen a head unit that is capable of “20-30 watts RMS”. 16 RMS is the highest achieved with OEM wiring, and the highest I’ve ever seen (we are talking certified numbers, not the “50x4 watts” “peak” that all head units advertise. (Look at CEA-2006 certified power ratings if you don’t understand or “disagree”) 
Remember that an amplifier can always make less power than its maximum rating and distortion increases as amplification or volume does.

ASIN	B08MZBS2D2
Best Sellers Rank	#195,245 in Electronics ( See Top 100 in Electronics ) #467 in Car Multichannel Amplifiers
Brand Name	AudioControl
Customer Reviews	4.5 4.5 out of 5 stars (44)
Included Components	6-Channel Matrix DSP Amplifier, Speaker Connectors, Fuses, User Manual
Item Dimensions	12 x 8 x 2.1 inches
Item Weight	5 Pounds
Manufacturer	AudioControl
Material Type	Aluminum
Maximum Output Power	6 x 125W @ 4Ω, 6 x 200W @ 2Ω, 3 x 400W @ 4Ω Bridged
Minimum Supply Voltage	12 Volts
Model	D-6.1200
Mounting Type	Surface Mount
Number of Channels	6
Output Power	1200 Watts
Part Number	D-6.1200
Specification Met	CE, FCC
UPC	851523007218 789993543571
Unit Count	1.0 Count
Voltage	16 Volts
Warranty Description	30-Day Warranty

D-6.1200 Matrix DSP 3/4/5/6-Channel Car Audio Amplifier with AccuBASS, 1200W, Class D Premium High-Fidelity Multichannel Amp, 30-Band Equalizer, Works with OEM & Aftermarket Sound Systems

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