BuildsMembersVideosForums
Teams
Browse teams
Events
Car shows & meets
Competitions
SPL & SQ leagues
Contest
Win prizes!
Equipment
Browse audio gear
Installation Shops
Find professional installers
Equipment Brands
Explore top brands
Retailers
Find dealers & stores
Creators
YouTubers & reviewers
Calculators & Tools
Box, impedance, wire & more
Login

Get updates on builds, events & deals

Get updates on builds, events & deals

COMMUNITY
  • Browse Builds
  • Members
  • Groups
  • Teams
  • Competitions
  • Events
  • Promoters
  • Video Galleries
  • Brands
  • Retailers
  • Equipment Database
  • Submit Your Build
TOOLS
  • Box Calculator
  • Impedance Calculator
  • Wire Gauge Calculator
  • Amplifier Matching
  • Cone Area Calculator
  • dB Power Calculator
  • Ohm's Law Calculator
  • Power Calculator
  • Lithium Battery Calculator
  • Strapped vs Gain Matched
SUPPORT
  • Installation Guides
  • Warranty Info
  • Contact Us
  • Dealer Locator
COMPANY
  • Sparked Innovations Store
  • About Us
  • Eddie's Blog
  • Privacy Policy
  • Terms of Service
  • Data Policy & Ethics
  • Data Deletion
  • Changelog
FOR BUSINESS
  • Partner With Us
  • Become a Retailer
  • List Your Shop

Product data aggregated from publicly available retailer listings

Sonic ElectronixWoofers EtcSky High Car AudioDown4Sound ShopBig Jeff AudioCar Audio BargainShowtime Electronics+ more
Loading...

© 2026 Sparked Innovations. All rights reserved.

POWERED BY SPARKED INNOVATIONS
v1.00|Beta|Live
Home/Equipment/Amplifiers/Sundown Audio/Horizon HZ-100.4 4-Channel Amplifier
Sundown Audio Horizon HZ-100.4 Amplifier - 4-Channel, 100W RMS per channel, Class A/B, bridgeable, 4-ohm stable - Black ribbed aluminum chassis, compact design
Sundown Audio/Amplifier/Horizon

Horizon HZ-100.4 4-Channel Amplifier

Sundown Audio HZ-100.4 | Horizon Series 4-Channel Full-Range Amplifier (100W x4) More Power. More Control. Better Sound. Step up your system with the HZ-100.4, Sundown’s high-output 4-channel amplifier that delivers 100 watts RMS per channel at 4 ohms — or 170W x4 at 2 ohms. Whether you’re powering component speakers, pro audio drivers, or full-range coaxials, the HZ-100.4 gives you headroom to push your gear harder, with less strain and more sonic clarity. This amplifier was made for audio lovers who want control. With fully adjustable HPF and LPF crossovers, you can run active or passive setups, bridge channels, or mix configurations. It’s built with high-level inputs, DC Sense, and 4-way protection, making it just as at home in factory integration as it is in custom builds. If you're ready to take your highs and mids from average to outstanding, the HZ-100.4 gives you the tools and the power to make it happen — all in one clean, efficient package. Specs: RMS Power @ 14.4V • 4 Ohm: 100W x4 • 2 Ohm: 170W x4 High Pass Filter (CH1-4): 27Hz – 250Hz Low Pass Filter (CH1-4): 27Hz – 250Hz Input Sensitivity: Up to 6V Signal-to-Noise Ratio: 95dB Fuse Rating: 60A Dimensions: 8.63" x 4.63" x 2.2" Weight: 2.93 lbs (1.33 kg)
Used in 0 builds
View All Sundown Audio Amplifiers

Specifications

channels
4
rms watts
170 W
Compare Prices(1 retailer)
Sparked Innovations
Sparked InnovationsBest Price
Available
$1,877.99
$2,479.97Save 24%
Updated 3/24/2026
Also check Amazon

Search for this product on Amazon

Prices and availability may vary. Click to verify current pricing at retailer.

Need this installed?

Browse 41+ professional car audio installers in our network

Find an Installer

Frequently Asked Questions

What is the Sundown Audio Horizon HZ-100.4 4-Channel Amplifier?

The Sundown Audio Horizon HZ-100.4 4-Channel Amplifier is a car audio equipment made by Sundown Audio. View full specifications and where to buy on this page.

How much does the Sundown Audio Horizon HZ-100.4 4-Channel Amplifier cost?

The Sundown Audio Horizon HZ-100.4 4-Channel Amplifier typically sells for around $290 depending on the retailer and variant. Check the "Where to Buy" section for current pricing from authorized dealers.

Where can I buy the Sundown Audio Horizon HZ-100.4 4-Channel Amplifier?

You can purchase the Sundown Audio Horizon HZ-100.4 4-Channel Amplifier from authorized dealers listed in the "Where to Buy" section on this page. We recommend buying from authorized retailers to ensure warranty coverage and genuine products.

Customer Reviews

-

0 reviews

5
0
4
0
3
0
2
0
1
0

Sign in to write a review

Loading reviews...

More from Sundown Audio

Sundown Audio X-Series v.3 10" Subwoofer *USED*

X-Series v.3 10" Subwoofer *USED*

Subwoofer
Two-Pack ANL Fuses

Two-Pack ANL Fuses

Accessory
Sundown Audio X-Series v.3 18" Subwoofer *USED*

X-Series v.3 18" Subwoofer *USED*

Subwoofer
Sundown Audio U v.1 Series 12 *USED*

U v.1 Series 12 *USED*

Subwoofer
Push Terminal Assembly for U, X, Zv, Ns and Team Subwoofers

Push Terminal Assembly for U, X, Zv, Ns and Team Subwoofers

Accessory
Sundown Audio Spider Spacer Accessory

Spider Spacer

Accessory
View All Sundown Audio Products

No Builds Yet

Be the first to showcase a build with this Amplifier!

Compare Horizon HZ-100.4 4-Channel Amplifier

vs Audiobahn A5000SPL SPL Competition Ampli...vs Audiobahn A2X200HQ 2-Channel Amplifiervs Sound Digital EvoX 400.4 4-Channel Amplifiervs Alpine PAA-150vs Deaf Bonce DB-180.4vs DS18 4-Channel In and 8-Channel Out...

Similar Amplifiers

A5000SPL SPL Competition Amplifier
Audiobahn

A5000SPL SPL Competition Amplifier

1 build

A2X200HQ 2-Channel Amplifier
Audiobahn

A2X200HQ 2-Channel Amplifier

1 build

EvoX 400.4 4-Channel Amplifier
Sound Digital

EvoX 400.4 4-Channel Amplifier

1 build

Alpine
Alpine

PAA-150

Deaf Bonce
Deaf Bonce

DB-180.4

DS18 4-Channel In and 8-Channel Out Digital Sound Processor with Bluetooth
DS18

4-Channel In and 8-Channel Out Digital Sound Processor with Bluetooth

Recommended Subwoofers

Matched by RMS power
C2-600 120W RMS 6” C2 Series Single Component Woofer
JL Audio
Great Match
100W RMS
View →
RT8PT
MTX
Great Match
100W RMS
View →
RTP8A
MTX
Great Match
100W RMS
View →

Power matching based on measurement data. Results show subwoofers within 75-150% of this product's RMS rating.