Studiomaster QX2-4000 2-Channel 1U Digital Power Amplifier (2 x 3400W @ 4 Ohms)
The Studiomaster QX2-4000 is a high-power, two-channel digital amplifier built for large-format PA systems, touring rigs and professional rental applications.
The QX2-4000 is part of the Studiomaster QX Series of advanced digital power amplifiers, engineered to deliver extremely high output levels while maintaining over 95% operating efficiency. Intelligent amplifier adjustment technology ensures stable performance even under high current, low impedance conditions, making the QX range ideal for demanding professional sound systems.
Despite its exceptional power capability, the QX2-4000 is housed in a compact 1U chassis and weighs under 12kg. Active power factor correction (PFC) and a highly reliable soft-switching power supply allow the amplifier to operate universally from 90–250VAC, making it equally suitable for fixed installations, touring racks and portable PA systems.
With output ratings of 2 x 3400W at 4 ohms, and an enormous 9520W in bridged mode at 4 ohms, the QX2-4000 provides vast system headroom for driving large subwoofer arrays, line array systems, club sound systems and high-power stage monitoring.
Output Power & System Capability
The QX2-4000 supports stereo, parallel and bridged operating modes, allowing flexible system configuration for a wide range of professional audio setups. Multiple selectable gain settings and an integrated output limiter provide accurate control over system gain structure and loudspeaker protection.
Stable 2 ohm operation combined with an extremely high damping factor ensures excellent loudspeaker control, particularly in high-output subwoofer applications where fast transient response and tight low-frequency performance are essential.
Operational Design & Reliability
Built for continuous professional use, the QX2-4000 incorporates comprehensive protection systems including low voltage, overload, thermal and DC output protection. Variable speed fan cooling provides efficient thermal management while keeping noise levels as low as possible in real-world installations.
The internally modular design allows for fast servicing and reduced downtime, making the QX2-4000 particularly attractive for rental companies, touring engineers and venues operating multi-amplifier racks.
Connectivity & Control
Balanced XLR inputs ensure clean, low-noise signal integration with professional mixing consoles, DSP processors and system controllers. Professional speaker outputs and a 32A mains input connector provide the current handling required for high-power touring and installation systems.
Front panel indicators display thermal status, fault conditions and limiter activity, allowing engineers to monitor system performance at a glance during operation.
Studiomaster QX2-4000 Key Features:
- Advanced digital amplifier design with over 95% efficiency
- Active power factor correction (PFC)
- Universal 90–250V switching power supply
- 2-channel 1U rackmount format
- Stable operation down to 2 ohms
- Stereo, parallel and bridged modes
- Multiple selectable gain modes
- Integrated output limiter
- Balanced XLR inputs
- Variable speed fan cooling
- Internally modular design for easy servicing
- Low voltage, overload, thermal and DC output protection
- Thermal, fault and limiter status indicators
Specifications:
View our shipping and delivery information below. All prices include VAT.
Important notice for non-UK orders: Any order being shipping outside of the UK will incur an import tax. See below for more information.
Cut-off Times
Orders must be placed before 3:30pm to guarantee same-day dispatch. Any orders placed after this time are not guaranteed to be shipped the same day, and are more likely to be shipped the next working day.
To guarantee Saturday Delivery, orders must ideally be placed before 2pm.
We operate during office hours, Mon-Fri, 9am - 5pm, and are closed during the weekend.
Orders placed over the weekend or Friday after cut-off will be processed and shipped the following Monday (or Tuesday during bank holidays).
Mainland UK Delivery Charges
Note: Next-day services are classed as working days (Mon-Fri) and do not include weekends. Please choose Saturday delivery if you require the item over the weekend.
Please also note orders with a high number of boxes may be subject to an additional charge.
All delivery options will be available at the checkout stage. Please ensure you add a mobile number to your order for tracking information.
Offshore & International
We ship to Scottish Highlands, Islands, Ireland and the EU. Please see the table below for base prices. Please note that these prices are subject to change based on the number of boxes.
The following postcodes fall under 'Highlands & Islands', and are subject to the above rates/lead time.
- Scottish Highlands: FK17-21, IV1-39, IV52-54, IV63, KW1-14, PA21-40 (excluding PA38), PH19-26, PH30-41, PH49-50
- Scottish Islands: HS1-9, IV40-51, IV55-56, KA27-28, KW15-17, PA20, PA38, PA41-49, PA60-78, PH42-44, ZE1-3
If a UK Mainland next-day service is selected at checkout, please be aware that it won't be sent on that service.
If you require a next-day service to Northern Ireland and the highlands, get in touch so we can assist further.
EU Import Tax
Any goods shipped outside of the UK, over a certain value, will incur an import tax. The cost and rate will depend on the country and the order value.
This is a legal requirement and MUST be paid prior to delivery in order to receive your goods. You will be contacted by the courier once the order is dispatched to pay the fee.
Failure to pay import tax when applicable will result in the order being shipped back to Audio Volt. Any returned goods sent back to us due to non-payment of import tax are NOT ELIGIBLE for a refund on the shipping charge.
You can obtain an import duty estimate here.
Delivery Notes
On delivery, you must inspect the goods carefully for damage as Audio Volt is unable to accept responsibility for damage in transit, shortage of delivery or loss of products unless the customer advises Audio Volt of such within three working days from the date of delivery.
60 Day Returns Policy
We ask that you follow these guidelines to help us process your return as quickly and efficiently as possible:
- Please keep your order reference to hand. This confirms your original order and gives us the necessary details to authorise the product's return.
- Contact our Customer Services Team on 02476 369890 (or email info@audiovolt.co.uk). We will then send you an RMA number and a returns form, which needs to be completed and sent back with the returned item(s).
- If the order has been unpacked, re-package it to ensure that it is being returned in its original condition. Please make sure all items relating to the product are returned, including manuals and cables.
- When returning an item, please obtain a proof of postage receipt from the courier.
Returned items must be mailed within 10 days of when the RMA number has been issued. Items received with a post date 30 days after your requested return will NOT be eligible for refund.
Please note: our returns policy is quite straightforward, but there are a number of conditions that we ask our customers to comply with before applying:
- It is your responsibility to request a return. If you don't tell us you want to make a return, we don't know. Once you do tell us, we will do everything we can to action it.
- If you have not requested a return within 60 days of receiving an order, we will assume that you are intending to keep it, and we will not authorise a return.
- We always refund the payment according to how the original purchase was made and aim to do so within 72 hours of the return being received by us.
- Returned goods are liable for a restocking fee of 15% towards handling and repackaging if the order is not returned in its original, unopened packaging. This charge will be subject to our inspection of the returned goods.
- Delivery charges will not be refunded unless the delivered goods are faulty.
- Replacement products are dispatched immediately after the returned goods have been received and accepted by Audio Volt.
- Items that develop a fault within 30 days of delivery are eligible for a replacement or a refund. Delivery costs are also reimbursed for faulty items. Please contact our Customer Services Team on 02476 369890 if you believe your item has developed a fault.
Finally, please remember that notifying us of your intention to apply for a return, saving the delivery paperwork and keeping the order in its original packaging will help both you and Audio Volt to process the return quickly.
Any Questions?
If you have any questions about our returns policy, please telephone us on 02476 369890 or email us at info@audiovolt.co.uk.
We operate during office hours, Mon-Fri, 9am - 5pm, and are closed during the weekend.
