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Description

Sundown Audio SAEv4-900.5

SAEv4‑900.5 is a 5‑channel car audio amplifier from the “SAEv4” series by Sundown Audio. It combines a 4‑channel Class A/B section (for driving speakers) with a mono Class D subwoofer channel  allowing you to power a full car audio system (speakers + subwoofer) using a single amplifier. The amp is built with a robust heatsink/chassis (with 33 % more aluminum for cooling) and includes variable filters (high‑pass/low‑pass/subsonic), protection circuitry (thermal, voltage, speaker‑short, DC‑offset), and power/protect indicator LEDs.


Specifications

Specifications
Product Sku
SAEv4-900.5
Amplifier Type
5 Channel
1 Ohm RMS Power
500 x 1 @ 1 ohms RMS (Ch. 5)
2 Ohm RMS Power
80 x 4 (Ch. 1-4) + 225 x 1 @ 2 ohms RMS (Ch. 5) 120 x 4 (Ch. 1-4) + 325 x 1 @ 2 ohms RMS (Ch. 5)
Operation Voltage
DC 10.5V – 15.5V Power Input
Signal / Noise Ratio
92DB
Variable 12dB Subsonic Filter
10Hz-40Hz (Ch.5)
Variable 12dB High Pass Filters
40Hz-5kHz (Ch. 1-4)
Variable 12dB Low Pass Filters
40Hz-5kHz (Ch. 1-4) 40Hz-250Hz (Ch. 5)
Dimensions
Length
17.36″
Width
6.3″
Height
2.75″

 


Feature

  • 120 x 4 (Ch. 1-4) + 325 x 1 @ 2 ohms RMS (Ch. 5)
  • 80 x 4  (Ch. 1-4) + 225 x 1 @ 2 ohms RMS (Ch. 5)
  • 500 x 1 @ 1 ohms RMS (Ch. 5)
  • Hi-fidelity Class A/B+D design
  • Variable 12dB low & high pass filters: 40Hz-5kHz (Ch. 1-4)
  • Variable 12dB low pass filter: 40Hz-250Hz (Ch. 5)
  • Variable 12dB subsonic filter: 10Hz-40Hz (Ch.5)
  • Power and protection indicators included
  • Thermal, voltage, speaker short, and dc-offset protection circuitry
  • Optional wired remote control with clipping indicator 

About The Product

Power your entire system with a single Sundown amp! The SAEv4 is engineered with high-fidelity Class A/B+D multi-channel architecture, providing an ideal balance between performance and affordability. Leveraging the latest half-bridge technology, these amplifiers deliver clean, powerful signals in a compact design.

Featuring an all-new chassis and heatsink design with 33% more aluminum, this SAEv4 keeps your system cool, even when the music is cranked. The amp is packed with a variable subsonic, high pass and low pass filters, plus a 4-way protection circuit (thermal, voltage, speaker short, and DC offset).

With an input sensitivity of 6V max and 980 watts of RMS power at your fingertips, the SAEv4-900.5 is designed to drive your entire car audio system with precision and clarity!

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Questions and Answers

Q1: What power output does SAEv4‑900.5 deliver?

A1:

  • 80 W × 4 (channels 1‑4) + 225 W × 1 (sub channel) @ 4 Ω

  • 120 W × 4 + 325 W × 1 @ 2 Ω

  • 500 W × 1 (sub channel) @ 1 Ω

Q2: What type of amplifier is it (class / design)?

A2: The SAEv4‑900.5 uses a hybrid design: Class A/B for the 4‑channel speaker section (ch 1‑4) and Class D for the mono subwoofer channel (ch 5) — combining clarity for speakers with efficient bass power for the sub.

Q3: Does it have built‑in filters and tuning controls for speakers and subwoofer?
A3: Yes. Channels 1‑4 have variable high‑pass filters (HPF) (40 Hz–5 kHz). Channel 5 (sub) includes a variable low‑pass filter (LPF, 40 – 250 Hz) and a subsonic filter (10 – 40 Hz).
Q4: What protection and build-quality features does it include?
A4: It includes 4‑way protection: thermal protection, over/under-voltage protection, speaker‑short protection, and DC‑offset protection. It also features a heavy-duty aluminum heat‑sink chassis for effective cooling under load.
Q5: What are the basic electrical and installation specs?

A5:

  • Input sensitivity: up to 6 V max.

  • Signal-to-noise ratio: 92 dB

  • Operating voltage: DC 10.5 V – 15.5 V

  • Dimensions: 17.36″ (L) × 6.3″ (W) × 2.75″ (H)


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