PRV Audio QS400.4 QS Series 4-Channel 800W Max Power 2 Ohm, Class-D Full Range Car Amplifier
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What's Inside?
- • QS Series 4-Channel 800W Max Power 2 Ohm, Class-D Full Range Car Amplifier
- • Owner's Manual
Clean Power That Stays Strong Under Pressure
The PRV Audio QS400.4 2 Ohm Class-D Full Range Amplifier is built for car audio enthusiasts who want serious performance without taking up space. Its compact high-fidelity design with a small heatsink makes installation easy even in tight builds, while still delivering clean and accurate sound. You get strong 4-channel full-range output that keeps your mids, midbass, and highs balanced with clarity and detail that makes every track feel alive.
Clean Power That Stays Strong Under Pressure
This amplifier is engineered for real world use, not just specs on paper. With 2-ohm stable performance, it holds consistent power delivery even under demanding loads, making it perfect for setups that push their system hard. Advanced thermal management keeps everything running cool during long listening sessions, while the high power efficiency design ensures you get strong output without wasting energy or adding unwanted distortion. The result is a clean and reliable sound that stays solid even when the volume climbs.
Built for Real Installations and Real Sound Quality
The QS400.4 is made for builders who want flexibility and professional level results. Its wide application compatibility works great with component speakers, tweeters, and full range setups, giving you freedom to design your system your way. Clean signal amplification keeps your audio pure even at high volume, so your music stays detailed and distortion free. Add in its ultra compact chassis and professional grade build quality, and you get an amplifier that is easy to install, dependable under pressure, and ready to bring your system to life with tight midbass punch and crystal clear highs.
Frequently Asked Questions (FAQ)
- • Why does my PRV Audio QS400.4 2 OHM keep going into protection mode?
Protection mode is usually caused by incorrect speaker impedance, shorted speaker wires, poor ventilation, or low battery voltage. Inspect the wiring and verify the speaker load matches the amplifier's specifications.
- • Can I bridge the QS400.4 2 OHM to power larger speakers?
Yes, the amplifier supports bridged operation when wired correctly. Always confirm the minimum bridged impedance before connecting your speakers to avoid damaging the amplifier.
- • Why is one channel on my QS400.4 2 OHM not producing sound?
A silent channel can result from a loose RCA cable, damaged speaker wire, incorrect crossover settings, or a defective speaker. Test each component individually to locate the issue.
- • Why does my amplifier get hot even when I am not playing at full volume?
High operating temperatures may be caused by restricted airflow, low impedance loads, or improperly adjusted gain settings. Mount the amplifier in a well ventilated area for better cooling.
- • Can the QS400.4 2 OHM power both door speakers and tweeters?
Yes, many users use this amplifier to power full range speakers and tweeters. Proper crossover settings are important to protect each speaker and achieve balanced sound.
- • Why do my speakers distort before reaching maximum volume?
Distortion often occurs when the amplifier gain is set too high, the source unit is clipping, or the speakers cannot handle the applied power. Proper gain matching helps maintain clean audio.
- • Is the QS400.4 2 OHM suitable for motorcycles or UTV audio systems?
Yes, many enthusiasts install it in motorcycles, UTVs, and custom powersports builds. Be sure to mount the amplifier in a location protected from excessive moisture and heat.
- • Why do I hear a popping sound when the amplifier turns on or off?
Turn on and turn off pops are commonly caused by remote wire timing, poor grounding, or installation issues. Reviewing the power and signal wiring usually resolves the problem.
- • What size power wire should I use for the QS400.4 2 OHM?
Choose a power cable size that matches the amplifier's current requirements and the length of the cable run. Using properly sized wiring helps maintain stable voltage and reliable performance.
- • How can I get the best sound quality from the QS400.4 2 OHM?
Set the amplifier gain correctly, use quality RCA cables and speaker wiring, configure the crossover for your speakers, and avoid excessive bass or treble boost for clean, balanced audio.
- Maximum Power : 800 Watts
- Number of Channels : 4
- Frequency Response : 20-25000 Hz
- Built In Crossovers : Yes
- RMS Power Output : 400 Watts
- Channel Separation : Yes
- Amplifier Class : D
- Fuse Rating : 25 A
Features:
- Compact High-Fidelity Design: Engineered with a small heatsink for space-saving installation while maintaining clean, accurate audio reproduction.
- 4-Channel Full-Range Output: Delivers balanced amplification for midbass, mids, and highs with strong clarity and detail.
- 2-Ohm Stable Performance: Optimized to maintain consistent power delivery under demanding low-impedance loads.
- Precision Sound Reproduction: Produces tight midbass impact with crystal-clear high-frequency response for balanced system tuning.
- Advanced Thermal Management: Proprietary heat dissipation system ensures stable performance and cool operation during extended use.
- High Power Efficiency Output: Designed to deliver strong wattage with minimal distortion for high-performance audio setups.
- Wide Application Compatibility: Suitable for component speakers, tweeters, and full-range speaker systems in custom builds.
- Clean Signal Amplification: Maintains audio integrity even at high volume levels for distortion-free listening.
- Installation-Friendly Size: Ultra-compact chassis allows flexible mounting in tight vehicle spaces.
- Professional Build Quality: Engineered for reliability under continuous load in demanding car audio environments.
Specifications:
- Impedance: 2 Ohm
- Channels: 4 Channel
- Rated RMS Power at 14.0 V at 2 Ohm: 4x 100 Watts RMS
- Rated RMS Power at 14.0 V at 4 Ohm: 4x 70 Watts RMS
- Bridged Rated RMS Power at 14.0 V at 4 Ohm: 2x 200 Watts RMS
- Average Efficiency: 80%
- Operating Voltage: 9 to 15 Volts
- Musical Current Draw: 45 A
- Minimal Power Wire Input: (OFC) 8 Gauge wires
- Built-in Crossover: Fixed HPF & LPF at 90 Hz
- Minimal Speaker Wire Output: 14 Gauge
- Frequency Response(-3dB): 20 – 25,000 Hz
- Min. Input Sensitivity for Max. Output: 200 mV
- Signal Input: 2 Pair RCA
- Signal to Noise: >90 dB
- Protection System: High Temperature / Short circuit on Output
- Heat Sink Type: Heavy Duty Cast Aluminum
- Dimensions (Width x Depth x Height): 4.00″ x 5.40″ x 2.00″
- UPC: 810075523898
- Weight: 1.8
- Authorized Internet Dealer
Warranty: 1 Year Warranty.
This item is accompanied by a manufacturer's warranty. If it is found to be defective, it may be returned to OnlineCarstereo.com for replacement within 1 Year from the original date of purchase with proper return authorization.
