Description
The Quest QTA4040M is a professional 4-channel Class-D installation power amplifier engineered for advanced commercial audio systems, multi-zone distributed sound applications, enterprise AV integration, hospitality venues, educational campuses, houses of worship, and large-scale installed sound environments requiring intelligent DSP processing, network audio integration, and highly efficient multi-channel amplification. As part of Quest Engineering’s advanced QTA Series, the QTA4040M combines high-efficiency Class-D amplification, integrated DSP control, Dante™ networking capability, and flexible low/high-impedance operation within a compact professional rack-mount platform.
Designed for modern networked AV infrastructures, the QTA4040M delivers 4 × 400W output power with support for both low-impedance and 70V/100V distributed audio systems, making it ideal for commercial installations requiring flexible loudspeaker deployment and centralized system control. The amplifier’s integrated DSP engine enables advanced loudspeaker optimization, system tuning, crossover management, EQ adjustment, delay configuration, and limiter control directly within the amplifier platform.
The built-in Dante™ network audio capability enables seamless integration into digital AV infrastructures and enterprise audio networks, allowing low-latency multi-channel audio transport across large-scale commercial environments. This makes the QTA4040M particularly suitable for modern conferencing systems, hospitality audio networks, educational facilities, and centralized paging/distributed sound systems.
Engineered for professional reliability, the amplifier incorporates comprehensive protection systems including thermal protection, overload protection, short-circuit protection, DC protection, and intelligent cooling management to ensure stable continuous-duty operation in demanding installation environments. The high-efficiency Class-D architecture minimizes heat generation and reduces power consumption while maintaining strong dynamic audio performance.
Its compact rack-mount chassis and installation-focused design provide system integrators with a scalable, energy-efficient, and network-ready amplification solution for professional commercial AV applications.
Performance Highlights:
• Professional 4-channel Class-D installation amplifier
• 4 × 400W output power for commercial audio systems
• Integrated DSP processing for advanced loudspeaker optimization
• Dante™ network audio capability for digital AV infrastructures
• Supports low-impedance and 70V/100V distributed audio systems
Why You Should Buy This Product
• ⭐ Integrated DSP reduces need for external system processors
• ⭐ Dante™ networking enables scalable enterprise AV integration
• ⭐ Flexible low-impedance and 70V/100V support simplifies installations
• ⭐ Compact multi-channel design saves rack space and energy consumption
• ⭐ Ideal for hospitality, education, conferencing, and distributed audio systems
Key Features
• 4-channel professional installation amplifier
• 4 × 400W Class-D amplification platform
• Integrated DSP signal processing
• Dante™ network audio support
• 70V / 100V distributed audio compatibility
• Low-impedance speaker operation support
• Advanced loudspeaker optimization controls
• Built-in EQ, crossover, limiter & delay processing
• Rack-mount professional chassis
• Intelligent thermal management system
• Commercial AV integration capability
• Continuous-duty professional operation
Technical Specifications
General
• Product Type: Multi-Channel DSP Installation Power Amplifier
• Brand: Quest
• Model: QTA4040M
Audio & Performance
• Amplifier Channels: 4 Channels
• Output Power: 4 × 400W
• Amplifier Class: Class-D
• Frequency Response: —
• Signal-to-Noise Ratio: —
• Total Harmonic Distortion: —
DSP & Processing
• Built-in DSP: Yes
• EQ Processing: Yes
• Crossover Processing: Yes
• Delay Processing: Yes
• Limiter Processing: Yes
• Loudspeaker Optimization: Yes
Power Handling
• Low-Impedance Operation: Yes
• High-Impedance Operation: 70V / 100V
• Multi-Zone Distribution Support: Yes
Connectivity
• Audio Inputs: Professional Balanced Inputs
• Network Audio: Dante™
• Speaker Outputs: Multi-Channel Outputs
• Control Interface: DSP / Network Control
Protection
• Thermal Protection: Yes
• Overload Protection: Yes
• Short Circuit Protection: Yes
• DC Protection: Yes
• Intelligent Cooling System: Yes
Physical & Installation
• Mounting Type: Rack Mount
• Chassis Construction: Metal
• Finish: Black
• Cooling System: Temperature-Controlled Fan Cooling
Configuration
• Amplifier Type: DSP Network Installation Amplifier
• System Type: Commercial Distributed Audio Amplifier
• Built-in DSP: Yes
• Transformer: Integrated Hi-Z Operation Support
• Mode: Low & High Impedance Professional Audio Operation
Included
• 1 × 4-Channel DSP Installation Power Amplifier
• 1 × Power Cable
• User Documentation
Payment & Security

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Refund Policy
Refund Policy
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Returns
Our policy lasts 14 days. If 14 days have gone by since your purchase, unfortunately, we can’t offer you a refund or exchange.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.
Several types of goods are exempt from being returned. Perishable goods such as food, flowers, newspapers or magazines cannot be returned. We also do not accept products that are intimate or sanitary goods, hazardous materials, or flammable liquids or gases.
Additional non-returnable items:
Gift cards
Downloadable software products
Some health and personal care items
To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer.
There are certain situations where only partial refunds are granted (if applicable)
Book with obvious signs of use
CD, DVD, VHS tape, software, video game, cassette tape, or vinyl record that has been opened
Any item not in its original condition is damaged or missing parts for reasons not due to our error
Any item that is returned more than 15 days after delivery
Refunds (if applicable)
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.
Late or missing refunds (if applicable)
If you haven’t received a refund yet, first check your bank account again.
Then contact your credit card company, it may take some time before your refund is officially posted.
Next contact your bank. There is often some processing time before a refund is posted.
If you’ve done all of this and you still have not received your refund yet, please contact us at sanjay@audiomaxx.in
Sale items (if applicable)
Only regular-priced items may be refunded, unfortunately, sale / discounted items cannot be refunded.
Exchanges (if applicable)
We only replace items if they are defective or damaged. If you need to exchange it for the same item, send us an email at sanjay@audiomaxx.in and send your item to: 24, Kembros Estate, DP Road, Industrial Area, Sonapur, Bhandup West, , 400078 Mumbai MH, India.
Gifts
If the item was marked as a gift when purchased and shipped directly to you, you’ll receive a gift credit for the value of your return. Once the returned item is received, a gift certificate will be mailed to you.
If the item wasn’t marked as a gift when purchased, or the gift giver had the order shipped to themselves to give to you later, we will send a refund to the gift giver and he will find out about your return.
Additional Returns and Exchange Terms
1. Returns and Exchanges
At Audiomaxx India, we are committed to ensuring each customer has a hassle-free and enjoyable shopping experience. You may have received a Dead on Arrival or Malfunctioning Product, as such you must first approach the local service station of the concerned brand and seek remedy as per Warranty policy & terms of the company/brand wherein one can ask for free service, an exchange or refund for the former and only exchange for the latter with all spares & packaging.
2. Within how many days can most items shipped from Aduiomaxx be returned?
Most items shipped from Audiomaxx can be returned within 14 days of receipt of the shipment. However, certain products sold on Audiomaxx may have different policies that govern their return.
When you shop on the Audiomaxx website, we ensure that you have a smooth and easy returns experience. In the case of Refunds, we credit the entire amount that you have spent to your bank account.
3. When are returns not possible?
- There are certain conditions in which returns are not possible by Audiomaxx. These are when:
- The return request is made outside the specified time frame
- The product is damaged because of use
- The product is not in the same state as when you received it
- The item has been used and installed
- The product has been tampered with or has missing parts, accessories / serial numbers
- There is anything missing from the package you have received, including price tags, labels, and original packing.
4. When are refunds provided?
Audiomaxx provides refunds only when the product is dead on arrival and cannot be exchanged.
5. How do I cancel an order?
If you want to cancel your order, you need to get in touch with us along with your Order Number, before the item is shipped. On all such cancellation requests charge is applicable which varies from 5% to 10% depending on the product you want to cancel.
Shipping
To return your product, you should mail your product to: 24, Kembros Estate, DP Road, Industrial Area, Sonapur, Bhandup West, , 400078 Mumbai MH, India
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.
Depending on where you live, the time it may take for your exchanged product to reach you, may vary.
If you are shipping an item over Rs.5000, you should consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item.
All pre-bookings, at the time of delivery rates as prevailing on that day, will be charged and the difference is any shall be payable before shipping.
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