See all parts that fit your 2009 TT
400W Pro Series 4-Channel Amplifier with Remote Level Control
• 400W Max
• 100W x 4-Chan. @ 2 Ohm
• 50W x 4-Chan. @ 4 Ohm
• Soft Turn-On Circuit
• Remote Turn-On/Off Circuit
• Speaker-Level Inputs
• LED Power And Protect Indicator
Connect your factory antenna to a new aftermarket radio for select 1973-2025 vehicles from Audi, Mercedes-Benz, Volkswagen
$7.99
List price $11.99
6.5" to 6.75" Speaker Mounting Adapters for select 2004-2023 vehicles from Audi, Volkswagen
$19.99
List price $33.99
Install New Speakers in select 1994-2024 vehicles from Audi, Mercedes-Benz, Chevrolet
$10.99
List price $14.99
Universal 6.5" Waterproof Silicone Rubber Speaker Baffle Ring Kit (Pack of 2)
$21.99
List price $34.99
Universal 5.25" Waterproof Silicone Rubber Speaker Baffle Ring Kit (Pack of 2)
$16.99
List price $19.99
360W Peak (120W RMS) 6.5" GTO Series 2-Way Full Range Coaxial 3-ohm Car Speakers
$117.99
List price $180.00
800W Peak (100W RMS) 6.5" Stage1 Series 2 Way Coaxial 4-ohm Speakers
$49.95
List price $89.95
7" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay, Android Auto
$239.99
List price $269.99
• 400W Max
• 100W x 4-Chan. @ 2 Ohm
• 50W x 4-Chan. @ 4 Ohm
• Soft Turn-On Circuit
• Remote Turn-On/Off Circuit
• Speaker-Level Inputs
• LED Power And Protect Indicator
6.75" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto with Backup Camera
$329.99
600W Peak (200W RMS) 6.5” CS Series 2 Way Coaxial 4-ohm Speakers
$79.96
List price $119.99
6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto, and SiriusXM Ready
$349.99
List price $420.00
150W Peak (50W RMS) 3.5" Club Series 2 Way Coaxial 3-ohm Speakers
$79.95
List price $109.95
6.8" Double DIN Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay, and Android Auto (SiriusXM Ready)
$599.99
List price $750.00
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
6.2" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto and Phone Mirroring
$89.99
List price $269.99
600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers
$109.00
List price $119.99
Best selling similar products
• 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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• 100 watts x 4 channel @ 4 ohm
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• Total RMS Power: 600 watts
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• 220 watts x 4 channel @ 4 ohm
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• Total RMS Power: 1320 watts
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Manufacturer:
Model Number:
HPA400.4
Weight:
6.00lbs
Internal SKU:
hpa4004
Internal Product ID:
22068
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Nice amp
There are no cons to this amp. The pros: Easy installation, has enough power for what I need it for and it looks great. I would recommend this product if you have a small car as you don't need a 1000 watt amp unless your in a band or running a pa system.
13 found this helpful
Decent Basic Amp
I'm powering (2) 6x9's and (2) 5 1/4 inch speakers with this amp. It does the job pretty darn good. This thing runs hotter than a firecracker tho so I think I'm going to put a couple computer fans on a relay to keep it cool. I was kind of disappointed seeing it only has a 15 amp fuse in it. However if it lasts 6-8 months i can't complain for the price.
14 found this helpful
Great little amp.
I have a 2003 Bonneville SLE. The stock system in it was lack luster. However, I put Polk Audio speakers in the front doors and pioneer 6X9's in the rear deck and it helped, but the punch and clarity at high volume just wasn't there. I decided to amp my system. This amp is great. It is easy to use, was rather easy to install (did it myself), and it's been over 6 months now and it has never skipped a beat. I like to blast my music, and even in the summer months it has never ran hot. The 6X9's bass is much better and the highs are clearer too. The 6.5 inch door speakers really pound now and they rarely distort. I would recommend it. :)
12 found this helpful
Works great
Already had 4 speakers with sub in expedition... wanted to add extra speakers to 3rd row and tweeter on dash... works great and kids love the improved sound for watching DVDs... I've had it now for several months... no issues
11 found this helpful
Alright Product
When I first installed this amp I had a dead channel from the start, but the other three channels that worked sounded great and was a definite improvement over the stock sound.
12 found this helpful
hitrom 4 channel amp
i bought this am from sonicelectronix, it was real cheap and it works awesome, it has quite a bit of power for such a little amp.. best bang for your buck, its worth its price!!
11 found this helpful
Nicee!!!1
I really liked this amp and always have liked the brand hitron in amplifiers. I would recommend it, it does no overheat at all.
11 found this helpful
hitron
Cheap little amp does the job well for what i needed it for.
10 found this helpful
Gets the job done great!
For the price you cant beat this amp. I installed it almost 4 months ago and it still works and sounds excellent powering my 4 pioneer 6x8 premiere speakers. As mentioned by another reviewer it does run hot.
9 found this helpful
Good amp for for the money!
This replaced a factory amp with factory speakers. Easy to install and works fine. Good for stock type applications - I have a GM monsoon that had a stock amp -where you are not pushing the speakers too hard - blasting days are over for me. I would recommend it as a good value stock repacement.
9 found this helpful
Complete 4-Channel CCA 4 Gauge Amp Kit with RCA Cables and Speaker Wire
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Complete 4-Channel CCA 4 Gauge Amp Kit with RCA Cables and Speaker Wire
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4 Gauge Premium (CCA) Copper Clad Aluminum Amplifier Power Wiring Kit with Speaker Wire
(20)
$24.99
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4 Gauge 100% (OFC) Oxygen Free Copper Amplifier Power Wiring Kit with Speaker Wire
(78)
$99.99
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Universal Remote Bass Level Control Knob
Flush Mount & Universal via RCA. Works with any amp, controls your bass output
(8)
$7.99
List price $14.99
Add a 4-channel amplifier without replacing your factory radio
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Add a 4-channel amplifier without replacing your factory radio
(31)
$21.99
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NVX XIX45 X-Series RCA Interconnect Cable
16.4 ft. of 4-Channel X-Series RCA Cable with Dual Twisted Pair Hyper-Flex Technology
(24)
$23.99
List price $28.99
NVX V-Series RCA Interconnect Cable
19 ft. of 4-Channel RCA cable with dual twisted-pair conductors
(35)
$15.99
List price $32.99
NVX XIV45 4-Channel RCA Audio Interconnect Cable
5 Meters (16.4 ft.) 4-Channel RCA Audio Interconnect Cable with Dual Twisted Pair Hyper-Flex Technology
(27)
$16.99
List price $29.99
All-in-one cable for speaker and amp installation (20 feet)
(2)
$29.99
List price $47.99
75 ft. of True 16 Gauge 100% Copper EnvyFlex Speaker Cable/Wire
(21)
$34.99
List price $44.99
80 Amp Smart Relay Isolator (XSBI80)
Smart isolator - Monitors and auto-charging feature!
(2)
$24.99
List price $49.99
Great for isolating a second batter making it dedicated to the stereo system
(10)
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200 Amp Smart Relay Isolator (XSBI200)
Smart isolator - Monitors and auto-charging feature!
(6)
$49.99
List price $79.99
200 Amp Relay Isolator (BIR200)
Great for isolating a second batter making it dedicated to the stereo system
(17)
$49.99
List price $59.99
500 Amp Smart Relay Isolator (XSBI500)
Smart isolator - Monitors and auto-charging feature!
(8)
$89.99
List price $109.99
500 Amp Relay Isolator (BIR500)
Does not create a voltage drop to the second battery like conventional isolators
(36)
$79.99
List price $95.99
Belva Nine Function Digital Multimeter
Perfect for any installation and troubleshooting
(7)
$9.99
List price $29.99
Universal Positive/Negative 1/0 or 4 Gauge Battery Terminal
Make installation a breeze with the XBTU
(19)
$14.99
List price $24.99
World's Smallest AFS / Mini ANL Fuse Holder
Accepts 4 gauge or 8-gauge wire
(15)
$9.99
List price $19.99
4/8 Gauge Mini ANL (MANL, AFS) Fuse Holder
4/8 Gauge Mini ANL (MANL, AFS) Fuse Holder
(11)
$4.99
List price $9.99
High Quality Element Resistant AGU Fuse Holder
Belva BAGUH2 AGU Fuse Holder
(2)
$4.99
List price $9.99
Modular Linkable ANL Fuse Block
Modular Linkable ANL Fuse Block
(4)
$14.99
List price $59.99
ANL/Mini-ANL Fuse Holder with 1/0 or 4 Gauge Input and Output
No-fail termination and current flow, it helps keep your system protected and running smoothly
(50)
$12.99
List price $24.99
4/8 Gauge Mini-ANL/MANL/AFS Fuse Holder
4/8 Gauge Mini-ANL/MANL/AFS Fuse Holder
(6)
$7.99
List price $9.99
4 Pack of 80 Amp Nickel-Plated MANL Fuse
Mini-ANL (MANL/AFS) 80A Nickel Plated Fuses
(19)
$3.99
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4 Pack of 100 Amp Nickel-Plated MANL Fuse
Mini-ANL (MANL/AFS) 100A Nickel Plated Fuses
(17)
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4 Pack of 150 Amp Nickel-Plated MANL Fuse
Mini-ANL (MANL/AFS) 150A Nickel Plated Fuses
(11)
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2 Pack of 100 Amp Nickel-Plated ANL Fuse
ANL 100A Nickel plated for better power transfer
(8)
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2 Pack of 200 Amp Nickel-Plated ANL Fuse
Two fuses per order. High quality 200 Amp ANL Fuses
(22)
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2 Pack of 300 Amp Nickel-Plated ANL Fuse
Two fuses per order. High quality 300 Amp ANL Fuses
(19)
$3.99
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Gauge Reducer, 4 Gauge Input to 8 Gauge Pin
Great for amplifiers that do not accept a large gauge power wire
(23)
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List price $19.00
Pair of 4 Gauge Spade Terminals, #8 Opening
Spade Terminals • 4 Gauge • 1 Red & 1 Black • Nickel Plated
(7)
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4 Gauge Ring Terminals, 5/16" Opening
Nickel Plated Brass - 5 Pieces (3 Red & 2 Black)
(3)
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4 Gauge Ring Terminals with 3/8" Opening (5 Pieces)
4 Gauge Ring Terminals with 3/8" Opening (5 Pieces)
(8)
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(4-pack) 4 Gauge Solid Copper Ring Terminals with Shrink Tubing
(4-pack) 4 Gauge Solid Copper Ring Terminals with Shrink Tubing
(25)
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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.
