Free help & advice Learn more Hassle-free returns

Gift cards now available Learn more

  • Free help & advice

  • Hassle-free returns

  • Open 7 days a week

Need a better price? Reach out to us at (561) 207-7988 — we're happy to help.

SKU: UA-SFB10004
38% off

SFB-1000.4 4-Channel Amplifier *USED*

Sale price $345.99 Regular price $559.99
Shipping calculated at checkout.


Care information

Display general product information or specific product information using metafields.

Delivery and Shipping

Add some general information about your delivery and shipping policies.

Add a stand out message for your customers

Highlight title

Text to highlight a key feature of your product

Description

This is a used product that has been professionally rebuilt here at Sundown Audio. It comes with a non-doa warranty only. That means they are guaranteed to work when you receive it but no further warranty afterwards. Let us know within 24 hours of delivery if this product has an issue. We will not warranty any used subwoofer after that time. These potentially have scratches & scuffs on the magnets/motors and will not be in new condition.

  • 1,000 x 4 @ 1 ohm RMS
  • 590 x 4 @ 2 ohms RMS
  • 350 x 4 @ 4 ohms RMS
  • 4-channel full-range amplifier
  • Variable 12dB low pass filter: 50Hz – 6kHz
  • Variable 12dB high pass filter: 15Hz – 6kHz
  • Variable 12dB Bass Boost @ 50Hz
  • Power, protection & clipping indicators included
  • Thermal, voltage, speaker short, and dc-offset protection circuitry
  • Optional wired remote control with clipping indicator

Introducing the Sundown Full Bridge line of amplifiers! The “Brazilian Style” SFB packs a powerful punch in a compact size, stable down to 1 ohm per channel.  Use the SFB to wire several speakers together on every channel - an ideal amp for a PA mid/high speaker array, a large marine system, or your favorite set of separates. If you are looking for raw power on a budget –  look no further!

Product Manual

Specifications

  • Frequency Response: 10HZ-20KHZ(-3dB)
  • Input Impedance: 56k ohms
  • Input Sensitivity 5V Max
  • S/N Ratio 100dB
  • Minimum Supply Voltage: 9VDC
  • Maximum Supply Voltage: 16VDC
  • Working Voltage 10.5v-15.5v
  • Recommended Fuse Rating 350A
  • Dimensions 8.86″ x 10.43″ x 2.70″

Payment & Security

Payment methods

  • Amazon
  • American Express
  • Apple Pay
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Product features

Use this section to highlight specific product features to your customers.

Product comparison grid

Add content here to explain a bit about the range of products on offer and which ones may be most suitable for your customers.

A table comparing the facets of 4 products
Facet
Product title
View details
Product title
View details
Product title
View details
Product title
View details
By
ByProduct vendorProduct vendorProduct vendorProduct vendor
Price
Price
$99.99
$99.99
$99.99
$99.99
Description
DescriptionA description of the product, including details such as build quality, materials used and reasons to purchase.A description of the product, including details such as build quality, materials used and reasons to purchase.A description of the product, including details such as build quality, materials used and reasons to purchase.A description of the product, including details such as build quality, materials used and reasons to purchase.

Our Collections

Image banner

Share information about your brand with your customers. Describe a product, make announcements, or welcome customers to your store.