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Sundown Audio SIA-2500D (Open Box, Like New)

2500W RMS Class D SFB Series Monoblock Car Amplifier

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• 2000 watts x 1 channel @ 4 ohm
• 2500 watts x 1 channel @ 2 ohm
• 2500 watts x 1 channel @ 1 ohm
• Total RMS Power: 2500 watts
• Class D 1 ohm Stable Monoblock Amplifier

Learn more about the sia2500_obn
Was $461.99 Details
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$365.74

 with warranty

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Open box icon Brand new $384.99

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Description


Sundown Audio brand icon

Authorized dealer

Item Condition - Like New (Open Box):

This product works and looks like new. It may have been opened for a visual demo or product video. In some cases there may be signs of an attempt at installation like opened packaging or mounting screw holes used, but there is no real sign of use or wear. Includes all original parts, packaging and accessories (or suitable replacement)

Sundown Audio SIA-2500D (A-SIA2500)

2500W RMS Class D SIA Series Monoblock Car Amplifier
Quantity: 1

Product Details:

  • SIA Series Class D 1 ohm Stable Monoblock Amplifier
  • RMS Power Rating:
    • 4 ohm: 2000 watts x 1 channel
    • 2 ohm: 2500 watts x 1 channel
    • 1 ohm: 2500 watts x 1 channel
  • Total RMS power output: 2500 watts
  • Power, protection and clipping LED indicators
  • Wired bass level remote control with clipping indicator included
  • 4-way protection circuitry (thermal, voltage, speaker short and DC offset protection)
  • Dual MOSFET PWM power supply
  • Advanced 3-speed smart cooling fan design
  • Intelligent full bridge design
  • Input sensitivity:
    • Low level: 0 - 5 volts
  • Signal to Noise Ratio: 108 dB
  • Variable low-pass filter: 40 - 20000 Hz
  • Variable high-pass filter: 10 - 1000 Hz
  • Variable Bass Boost: 0 - 12 dB
  • Fuse Rating: 220A
  • 1/0 AWG gauge amplifier wiring kit is recommended for installation
  • Dimensions: 7.25" L x 7.25" W x 2.45" H
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty
  • MFR #: SIA-2500D

Specifications & Details


Key Features
Amplifier Key Features
Bass Boost
Power Specifications - Subwoofer Channel
RMS Power @ 4 ohms
2000 watts x 1 channel
RMS Power @ 2 ohms
2500 watts x 1 channel
RMS Power @ 1 ohm
2500 watts x 1 channel
Amplifier Specifications
Series
SFB Series
Amplifier Class
D
Number of Channels
1 - Mono
Total RMS Power Output
2500 watts
Minimum Impedance Unbridged
1 ohm
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
High-Pass Crossover Frequency
10 - 1000 Hz
Low-Pass Crossover Frequency
40 - 20000 Hz
Signal-to-Noise Ratio
108 dB
Bass Boost
0 - 12 dB
Remote bass/level controller
Yes
Total Fuse Rating
220A
Amp Bluetooth Connectivity
No
Hi-Res Certified
No
Low-Level Input Sensitivity
5 volts maximum
What is in the box?
Paperwork
User manual
WITB: Amplifiers
Amplifier
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

SIA2500_OBN

Weight:

5.40lbs

Internal SKU:

sia2500_obn

Internal Product ID:

224373

Customer Ratings & Reviews



5 star
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%



Durability
5
Value
5
Features
4.5
Design
5
Usability
4.5

Customer Reviews

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SIA2500D

The following review is for SIA-2500D, which is a part of the bundle you are viewing.

This amp is small but packs a punch . I love the built in fan. It’s also nice how the logo is on both sides so reads good no matter which way you turn it lol. Sonic Electronics has been top notch on shipping and follow up messages to keep you informed throughout the shipping process. I just ordered a couple more things last night .

By Robert on October 7, 2025 Checkmark Icon Verified purchase

Gives me what I wanted!

The following review is for SIA-2500D, which is a part of the bundle you are viewing.

Very good amp! Was able to push my sub to how I wanted, very clean design and great power. If you are looking for a budget friendly sundown amp the SIA series is the best choice!

By Angel on June 28, 2025 Checkmark Icon Verified purchase


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