Limited Edition 4-Channel Car Amplifier — 100 watts RMS x 4
Big Power, Small Size
Pioneer’s extra-efficient GM-DX874 Class-FD amplifiers mark a dramatic improvement in power output capability, yet are 50% smaller than the current GM-Series Class-AB amplifiers. That makes them more versatile in terms of installation as well as performance.
Improved Circuit Design
To prevent circuit shutdown, Pioneer’s digital amplifier circuit “Protection Control System” senses its internal temperature and automatically moderates input level accordingly. Stable, durable circuitry lessens the risk of high input power for the unit to achieve 1 Ω connection. This design enhances the flexibility to connect multiple subwoofers to a system.
Variable Low-Pass and High-Pass Filter
For extra flexibility, a variable LPF makes audio frequency more adjustable according to subwoofer characteristics and personal listening preferences. The GM-DX874 LPF is adjustable from 40 Hz to 500 Hz.
Pioneer Branded Electric Elements
High-quality elements provide high sound quality and a stable power supply.
Gold Plated Terminals
Gold plated terminals provide the ability to maintain an accurate signal with increased electrical conductivity, prevent corrosion and provide enhanced durability with excellent resistance against wear.
High-Resolution ability provides a super high-frequency playback over 40kHz and a wide dynamic range. Even if the source is not Hi-Res, the wide dynamic range provides a more detailed audio playback.
Aluminum Top Board
A high-quality cosmetic is only available on LIMITED models.
|Number of Channels||4/3/2|
|Wattage RMS (4 Ω <= 1 % THD+N)||100 W x 4|
|Wattage RMS (2 Ω <= 1 % THD+N)||150 W x 4|
|Wattage RMS (1 Ω <= 1 % THD+N)||125 W x 4|
|Wattage RMS Bridged (4 Ω)||300 W x 2|
|Frequency Response||10 Hz to 50 kHz|
|Total Harmonic Distortion (1 kHz, 4 Ω)||<0.05 %|
|Signal-to-Noise Ratio (IHF-A-Weighted)||>95 dB|
|Dimensions (W x H x D)||9-29/32″ x 2-3/8″ x 8-15/32″|
Detailed & Features of GM-DX874
|Amplifier Class||Class FD|
|Load Impedance Allowance (Ω)||1 to 8|
|Protection Control System||x|
|MOSFET Output Section||x|
|Balanced Isolator Input Circuit||x|
|RCA Outputs (Pass-Through)||x (A-Ch.)|
|Speaker Level Input||x|
|Automatic Signal Sensing and Turn-On||x|
|Hi-Volt Input Level Control
n(200 mV to 6.5 V)
n(4 to 8-gauge)
n(8 to 16-gauge)
|Crossover Type||Variable HPF/LPF|
|Crossover Frequency||40 Hz to 500 Hz|
|Crossover Slope||-12 dB/oct.|
|Bass Boost Frequency||50 Hz|
|Bass Boost Level||0 dB to 18 dB|
|Bass Boost Remote||x (B-Ch.)|