---
product_id: 10049402
title: "GM-D1004 400W 4-Channel GM Digital Series Class FD Amplifier"
brand: "pioneer"
price: "HK$2254"
currency: HKD
in_stock: true
reviews_count: 10
category: "Pioneer"
url: https://www.desertcart.hk/products/10049402-gm-d1004-400w-4-channel-gm-digital-series-class-fd
store_origin: HK
region: Hong Kong
---

# 400W max power output Compact 8.5x7x2.5 inch size THD < 0.5% ultra-clean sound GM-D1004 400W 4-Channel GM Digital Series Class FD Amplifier

**Brand:** pioneer
**Price:** HK$2254
**Availability:** ✅ In Stock

## Summary

> 🎵 Elevate your drive with hidden power and flawless clarity

## Quick Answers

- **What is this?** GM-D1004 400W 4-Channel GM Digital Series Class FD Amplifier by pioneer
- **How much does it cost?** HK$2254 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/10049402-gm-d1004-400w-4-channel-gm-digital-series-class-fd)

## Best For

- pioneer enthusiasts

## Why This Product

- Trusted pioneer brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Space-saving design:** Fits behind your dash like a stealthy sound ninja
- • **Powerful yet discreet:** 400 watts of crisp, clear sound without the bulk
- • **Plug & Play simplicity:** Effortless installation using factory stereo wiring—no car door opening required
- • **Versatile channel options:** 4-channel or bridged 2-channel modes to fit your custom setup
- • **Reliable road trip companion:** Stable performance with minimal heat, perfect for long drives

## Overview

The Pioneer GM-D1004 is a compact 4-channel Class FD amplifier delivering up to 400W of clean power with less than 0.5% distortion. Designed for easy installation using factory wiring, it offers flexible channel configurations and a sleek form factor that fits discreetly behind your dash, making it ideal for millennial professionals seeking premium sound without the hassle or bulk.

## Description

Pioneer GM-D1004 400W 4-Channel GM Digital Series Class FD Amplifier

Review: Value and Simplicity - For a combination of the money, size, ease of installation and quality - this is an awesome little unit! I installed this in my 3rd gen Honda CRV and couldn't be happier. I soldered everything together for the new head unit and the amp without even opening the car door - literally on the couch watching football. all I had to do was plug and play when it came down to working in the car. To make a direct comparison will be hard as I replaced the head unit at the same time with a pioneer mvh560 and the quality of sound is awesome! I am using polk db 6.5" speakers in each door (components in front). I wanted to hide an amp behind the dash (there is a lot of space behind the crv dash) and I knew I didn't need to blow the doors off of anything so I figured this would be more than enough to give some decently full sound and the ease of wiring was a dream. I have always hated running amp wires all over the place - this solved that problem by using all the factory stereo wires - I did create a new chassis ground for the relatively beefy ground wire that it comes with. The power wire is the same gauge and some would recommend running a power wire to it from the battery with a fuse, especially if you plan on maxing it out regularly. If you plan to enjoy tunes and have a conversation and not blow your kids' eardrums out - using factory stereo wiring is fine for the power wire. It took me to turn it up to uncomfortable levels to get it to start to have power and heat issues. To mount it I used double sided tape and zip ties to secure the amp behind the dash you wouldn't even know it's back there. There are no gain knobs - I personally love this feature since it's tucked away behind the dash and making gain adjustments post install would just irritate me enough to not do it. It comes down to what you want. I wanted a simple, decent sounding, and easy to install amplifier at this little guy delivered on all fronts. If you want BIG sound and lots of control - this will not make you happy. I am actually planning on getting another one of these for one of my other cars.
Review: Nice compact amp - Installed in line with an android radio. Simple install , found a 30 amp fused circuit on the dash fuse block, that was for diesel models, that was perfect as it only had one power pin installed. Snaked my power wire from drivers side of dash to center , making sure I have no pinching points. Then I used a fuse tapper along with proper wire size and fuse. Ran my wiring with slack, grounded my amp to the dash carrier and used the packaging foam as a cushion and zip tied the amp against the dash carrier brace that fit like a glove behind the trim panel. I can access the switches for filter control. Using the HPF and letting my Skar SVR 12" do the work for the low notes. Sound is nice , crisp and goes loud. Running 4 jbls 6.5 2ohm speakers. Never cut out on me even on a long road trip thru the desert. Would not hesitate to use again where you don't have room or want a hidden install. The size of a box your new phone comes in. Recommend.

## Features

- RMS Power Rating 4 ohms 45 watts x 4 chan /2 ohms 45 watts x 4 chan /Bridged 4 ohms 90 watts x 2 chan
- 4 or 2 channel operation
- Frequency Response 10-40 000 Hz
- Total Harmonic Distortion (THD) &lt 05%
- Power and Ground wiring is included

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00O8B7BXQ |
| Best Sellers Rank | #139,759 in Electronics ( See Top 100 in Electronics ) #317 in Car Multichannel Amplifiers |
| Brand | PIONEER |
| Customer Reviews | 4.3 4.3 out of 5 stars (278) |
| Date First Available | October 23, 2014 |
| Global Trade Identification Number | 00884938265652 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2 pounds |
| Item dimensions L x W x H | 8.5 x 7 x 2.5 inches |
| Item model number | GM-D1004 |
| Manufacturer | Pioneer Electronics USA Inc |
| Material | Aluminum, Steel, or ABS Plastic |
| Mounting Type | Surface Mount |
| Number of Channels | 4 |
| Output Power | 45 Watts |
| Package Type Name | Standard_packaging |
| Product Dimensions | 8.5 x 7 x 2.5 inches |
| Specification Met | CE, FCC |
| UPC | 804904105805 884938265652 |
| Voltage | 14.4 Volts |
| Warranty | Please contact the manufacturer |
| Weight | 3 Pounds |
| Wireless Remote | No |

## Product Details

- **Brand:** PIONEER
- **Item dimensions L x W x H:** 8.5 x 7 x 2.5 inches
- **Manufacturer:** Pioneer Electronics USA Inc
- **Mounting Type:** Surface Mount
- **Voltage:** 14.4 Volts

## Images

![GM-D1004 400W 4-Channel GM Digital Series Class FD Amplifier - Image 1](https://m.media-amazon.com/images/I/61KXVs3n0-L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Value and Simplicity
*by C***N on November 11, 2015*

For a combination of the money, size, ease of installation and quality - this is an awesome little unit! I installed this in my 3rd gen Honda CRV and couldn't be happier. I soldered everything together for the new head unit and the amp without even opening the car door - literally on the couch watching football. all I had to do was plug and play when it came down to working in the car. To make a direct comparison will be hard as I replaced the head unit at the same time with a pioneer mvh560 and the quality of sound is awesome! I am using polk db 6.5" speakers in each door (components in front). I wanted to hide an amp behind the dash (there is a lot of space behind the crv dash) and I knew I didn't need to blow the doors off of anything so I figured this would be more than enough to give some decently full sound and the ease of wiring was a dream. I have always hated running amp wires all over the place - this solved that problem by using all the factory stereo wires - I did create a new chassis ground for the relatively beefy ground wire that it comes with. The power wire is the same gauge and some would recommend running a power wire to it from the battery with a fuse, especially if you plan on maxing it out regularly. If you plan to enjoy tunes and have a conversation and not blow your kids' eardrums out - using factory stereo wiring is fine for the power wire. It took me to turn it up to uncomfortable levels to get it to start to have power and heat issues. To mount it I used double sided tape and zip ties to secure the amp behind the dash you wouldn't even know it's back there. There are no gain knobs - I personally love this feature since it's tucked away behind the dash and making gain adjustments post install would just irritate me enough to not do it. It comes down to what you want. I wanted a simple, decent sounding, and easy to install amplifier at this little guy delivered on all fronts. If you want BIG sound and lots of control - this will not make you happy. I am actually planning on getting another one of these for one of my other cars.

### ⭐⭐⭐⭐⭐ Nice compact amp
*by P***N on December 10, 2023*

Installed in line with an android radio. Simple install , found a 30 amp fused circuit on the dash fuse block, that was for diesel models, that was perfect as it only had one power pin installed. Snaked my power wire from drivers side of dash to center , making sure I have no pinching points. Then I used a fuse tapper along with proper wire size and fuse. Ran my wiring with slack, grounded my amp to the dash carrier and used the packaging foam as a cushion and zip tied the amp against the dash carrier brace that fit like a glove behind the trim panel. I can access the switches for filter control. Using the HPF and letting my Skar SVR 12" do the work for the low notes. Sound is nice , crisp and goes loud. Running 4 jbls 6.5 2ohm speakers. Never cut out on me even on a long road trip thru the desert. Would not hesitate to use again where you don't have room or want a hidden install. The size of a box your new phone comes in. Recommend.

### ⭐⭐⭐⭐ Great little amp!
*by R***D on January 15, 2016*

Pioneer GM-D1004 400W 4-Channel GM Digital Series Class FD Amplifier I installed this into my wife's 1989 Suburban along with a modified factory radio that had a 3.5mm AUX added to it and some cheap Boss audio speakers. We needed to keep the factory/stock look of the truck so we couldn't go with an aftermarket head unit. She shows the truck in AACA car shows as an original unrestored vehicle. The amp fit in the dash behind the radio, out of sight. I got a Scosche Reverse Wiring Harness for 1973-1991 General Motors Power/4 Speaker Connector and another factory male connector set. Using the two connectors I wired everything up in the house, then just plug and play out in the truck, no cutting of the factory wiring harness. If we want to or need to remove the amp it all just unplugs. The only issue I have with the amp is that we get a loud pop sound when the radio is turned on and off. This might be due to the remote power wire being connected, I didn't try out the auto turn on using the speaker input as the trigger. I may try this at some point to see if it solves the popping noise. Otherwise this little amp is great! Super small size, easy to hide, great power and sound and super easy install!

## Frequently Bought Together

- Pioneer GM-D1004 400W 4-Channel GM Digital Series Class FD Amplifier
- BOSS Audio Systems KIT2 8 Gauge Complete Car Amplifier Installation Wiring Kit with Power Cables, Ground Cables, Turn-On Wire, Speaker Wire, Terminals

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-02-24*