Name: Sundown Audio SIA-2500D (Open Box, Like New)
Brand: Sundown Audio
SKU: sia2500_obn
Price: 365.74 USD
Availability: Discontinued
Rating: 5.0000 (3 reviews)

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Product highlights

• 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

Description

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

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

Hi-Res Certified

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

Customer Ratings & Reviews

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Overall rating distribution

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

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By feature average rating

Durability		5
Value		5
Features		4.7
Design		5
Usability		4

Customer Photos & Videos

Customer Reviews

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I am really happy with this amp...mad my sa classic sound much better

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

By Jose on May 21, 2026 Checkmark Icon

Verified purchase

2021 Jeep Cherokee

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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

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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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