See all parts that fit your 2000 A4
400W RMS Class AB Power Series 4 Channel Car Amplifier
• 60 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class A/B 2 ohm Stable 4-Channel Amplifier
This offer cannot be combined with any other coupons or offers.
Rockford Fosgate Power T400-4
30% off
$439 99
$79 99
Priced separately $519 98
Promo Savings of $24 00
Total price:
$495 98
This offer cannot be combined with any other coupons or offers.
Rockford Fosgate Power T400-4
50% off
$439 99
$34 99
Priced separately $474 98
Promo Savings of $17 50
Total price:
$457 48
Pre-installed black nylon mesh covering protects the power wire from being damaged, and pre-terminated seamless power and ground ring terminals provide reliable performance and cut out the hassle when installing. This offer cannot be combined with any other coupons or offers.
Rockford Fosgate Power T400-4
25% off
$439 99
$79 99
Priced separately $519 98
Promo Savings of $20 00
Total price:
$499 98
Make adjustments with ease with 0dB to +18dB bass boost with this bass knob built specifically for Rockford Fosgate Amplifiers. This offer cannot be combined with any other coupons or offers.
Rockford Fosgate Power T400-4
100% off
$439 99
$49 99
Priced separately $489 98
Promo Savings of $49 99
Total price:
$439 99
• 60 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class A/B 2 ohm Stable 4-Channel Amplifier
The T400-4 amplifier is perfect for front/rear fading stereo systems or when dedicated amplification is required between front stage speakers and rear subwoofer(s). Thanks to the Dynamic Thermal Management, the small chassis design insures it can be installed in any location – like under front seats. This unit is a 4-channel amplifier capable of producing 100 Watts into each of its four channels at 2-Ohms. This can run a 4-way full-range system or use component speakers on the front with subwoofers on the rear.
6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto, and SiriusXM Ready
$339.99
List price $420.00
600W Peak (200W RMS) 6.5” CS Series 2 Way Coaxial 4-ohm Speakers
$79.96
List price $119.99
360W Peak (120W RMS) 6.5" Club Series 2-way Coaxial 3-ohm Speakers
$99.95
List price $139.95
480W Peak (120W RMS) 6.5” DS Series 2-way 4-ohm Coaxial Car Speakers (DSC6504)
$84.99
List price $94.99
600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers
$109.00
List price $119.99
6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay and Android Auto, and Built-in Alexa (Sirius XM Ready)
$469.99
List price $620.00
600W Peak (300W RMS) 6.5" Mille PRO Series 3-way 4-ohm Component Speaker System
$999.99
List price $1175.00
250W Peak (200W RMS) 6.5″ PNW Series 2 Way Component 3-ohm Speakers
$319.00
List price $339.00
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• 80 watts x 4 channel @ 4 ohm
• 125 watts x 4 channel @ 2 ohm
• Bridged: 250 watts x 2 channel @ 4 ohm
• Total RMS Power: 500 watts
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• 75 watts x 4 channel @ 4 ohm
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• Total RMS Power: 400 watts
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Manufacturer:
Model Number:
T400-4
Weight:
13.00lbs
Internal SKU:
t400-4
Internal Product ID:
9102
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WOW, very good performance
Origionaly intended to use the amp for my components but I ran out of money for toys so I am now stuck using this amp to power 2 Dayton Audio 15" reference subs temporarily. The subs are severely underpowered however they still sound fantastic. The birth sheet that came with the amp rated it at 'nearly' 500 watts RMS. Even when driving the amp at its peak output the distortion is minimal (would still not recommend it though). The only problem I have at all with this amp is that Punch EQ 18db adjust knob (only bass control knob that is compatable) can only adjust the rear channels. Not a big deal, I wouldnt use it anyway if it was on the components. The heat dispersion plate works well but if you have it in your trunk with no air circulation it will still overheat after about an hour IF running near full power.
For my ratings,
Value - was a 5 because Sonic Electronix has some of the best prices I can find from a higher end online dealer and I paid less for this amp than I would have for 400 RMS watt at walmart (not sure if walmart even knows that they are supposed to rate an amp at RMS not peak)
Look/design - 5 because I like simple asthetics, I dont need a bunch of flashy lights to show off since the only people that care about that are usually the people that dont know anything when it comes to stats and what the thing is for. I would rather show it off to people for its sound quality
Durability - 5 because I run it as close to full power as I can without getting distortion and it has no problem.
Features - 4 only because you cannot control all channels using the Punch EQ knob. They do make a bass control knob that will do that however it is not compatible with the Power series.
Ease of use - 5... plug and play (maybe adjust the gain and boost level a little bit but it sounded great right from the factory.
71 found this helpful
Amazing power output
Received my amp yesterday and I'm using 4 channel 4ohm output for components. The birth sheet has the power output at 85 whats x 4 @ 4ohm. That's amazing. Sounds great hooked up to my front and rear door type-R components. I couldn't be happier with my purchase. Sonic had this product at my doorstep the next day after ordering.
68 found this helpful
im in love!
As soon as i hooked this amp up to my component sets and they are amazing great power! i had my speakers hooked up to a 4 channel 600 watt sony xplod amp and there is no comparison.
64 found this helpful
Good amp for highs.
Once I installed it and tweaked it, I never had to touch it, clear crisp highs. I would reccomend this amp.
64 found this helpful
Small, powerful, and clean
Huge power, birth sheet says 547w RMS. Incredibly small too. Puts out twice the power my Pioneer 2ch of same size does, and way cleaner too.
Have it pushing my 4 T1682s
65 found this helpful
Great Amp!
This amp pushes extremely clean power to all 4 channels. I'm running Diamond S600s in the front and Beyma W6 in the rear for mid bass. This amp makes this speaker setup sound excellent. The highs are perfect and the lows are tight and hit hard. I definitely recommend this amp to anyone!
63 found this helpful
Soooo much power
I bought this amp to power my 4 6.5" door speakers and power them it does. Each speaker is rated at 50 watts RMS at 4 Ohms and I have to turn the gain on the amp way down to keep the speakers from blowing out of the door. The birth sheet shows significantly higher power ratings than is advertised for as well. In my opinion you cannot go wrong with this amp at all.
61 found this helpful
Good Buy
Makes my interior speakers sound great. Would recommend this amp to anyone.
62 found this helpful
Beast amps
Gotta say RF has some of the best amps on the market,love the power and sound quality from the RF amps.
60 found this helpful
Rockford t400
I have the T400 powering my focal 6.5 poly glass, it helps them scream to my satisfaction. I have no problem with the amp getting hot or handling my finger going to the volume .
59 found this helpful
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• 100 watts x 4 channel @ 4 ohm
• 150 watts x 4 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class A/B 2 ohm Stable 4-Channel Amplifier
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Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:
Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.
