Views: 1 Author: Site Editor Publish Time: 2026-10-21 Origin: Site
A speaker power amplifier should be chosen based on output power, amplifier class, and load impedance matching to your speakers. AOMEI Audio, a China power amplifier manufacturer, offers two distinct professional power amplifier lines — the PA-H Series (Class H) for maximum headroom and the PX-D Series (Class D) for lightweight, high-efficiency portability. Choose PA-H for large venues and PX-D for touring or space-constrained setups.
Sourcing a professional power amplifier from an overseas factory can feel like a gamble. Specifications vary wildly between brands, terminology gets confusing fast, and a wrong decision means blown speakers or a system that can't fill a room. If you're evaluating a stereo power amplifier for touring sound, a fixed installation, or a rental fleet, understanding amplifier class, output power, and impedance handling will save you time and money.
This guide breaks down what to look for in a professional power amplifier, using AOMEI Audio's PA-H Series and PX-D Series as real-world reference points, so you can match the right amplifier to the right application.
A professional power amplifier is built to drive passive loudspeakers at high output levels, reliably, over long operating hours, in demanding live-sound or fixed-installation environments. Unlike consumer stereo receivers, professional units prioritize thermal management, protection circuitry, and consistent performance under sustained load.
Three specifications matter most when comparing options:
Output power at different impedances (8Ω, 4Ω, 2Ω): Speakers present varying electrical loads, and an amplifier's power output changes depending on that load. A well-built amplifier should show a clear, stable power increase as impedance drops.
Amplifier class (Class D vs. Class H): This determines efficiency, weight, and heat output.
Protection and cooling systems: Over-heat, short-circuit, DC safeguard, and overload protection prevent costly equipment failure in the field.
This is the first fork in the road for anyone comparing a professional power amplifier, and it's where AOMEI Audio's two series diverge clearly.
Class H amplifiers, like AOMEI Audio's PA-H Series, use a rail-switching design that boosts voltage supply only when the signal demands it. This delivers very high output power and excellent headroom for dynamic peaks, which is why Class H remains a popular choice for large venues, concert touring rigs, and permanent installations where raw power and sonic punch matter more than cabinet weight.
Class D amplifiers, like AOMEI Audio's PX-D Series, switch the output transistors on and off at high frequency, which dramatically reduces heat generation and power loss. The result is a lighter, more compact chassis that still delivers strong output. Class D is the go-to choice when portability, energy efficiency, and rack space are priorities, such as mobile DJ setups, rental companies, and small-to-mid venue installations.
Choose the PA-H Series if you need maximum output power for large-format speaker arrays and don't need to carry the amplifier rack by hand. Choose the PX-D Series if your crew transports gear frequently, your rack space is limited, or you're running a 2U lightweight build.
The table below lays out the core specifications across both series so you can compare a stereo power amplifier model to your speaker load and venue size directly.
Specification | PA800H | PA1500H | PX3-D | PX10-D |
|---|---|---|---|---|
Amplifier Class | Class H | Class H | Class D | Class D |
Output Power (8Ω) | 800W x 2 | 1500W x 2 | 300W x 2 | 1000W x 2 |
Output Power (4Ω) | 1350W x 2 | 2700W x 2 | 510W x 2 | 1600W x 2 |
Output Power (2Ω) | 2100W x 2 | 4300W x 2 | N/A | N/A |
Bridge Mono Mode (8Ω) | 2700W | 4550W | 1000W | 3150W |
Bridge Mono Mode (4Ω) | 3500W | 7500W | 1650W | 5400W |
Frequency Response | 20Hz–20KHz | 20Hz–20KHz | 20Hz–20KHz | 20Hz–20KHz |
THD (20Hz–20KHz, 8Ω) | 0.05% | 0.05% | 0.05% | 0.05% |
Signal to Noise | 103dB | 103dB | 103dB | 103dB |
Damping Factor (8Ω) | >500 | >500 | >500 | >500 |
Dimensions (W x D x H) | 650x580x220mm (3U) | 650x580x220mm (3U) | 483x453x89mm (2U) | 483x453x89mm (2U) |
Net Weight | 36.5Kg | 42.5Kg | 10.5Kg | 13Kg |
Both series share the same protection architecture: over-heat, short-circuit, DC safeguard, over-loading, and boot-strap short test protection, backed by high/low automatic cooling control. This consistency matters for buyers sourcing from a China power amplifier factory, since it means reliability standards don't drop as you move between product tiers.
Once you know which class suits your application, the next step is matching output power to your speaker's power handling rating. A widely used rule of thumb in professional audio is to select an amplifier that delivers roughly 1.5 to 2 times the continuous (RMS) power rating of your passive speaker. This headroom allows the amplifier to reproduce transient peaks cleanly without clipping, which is actually gentler on speaker drivers than running an underpowered amplifier at its limit.
For example, a speaker rated at 500W RMS would typically pair well with a PA800H running at 800W x 2 per channel at 8Ω, giving comfortable headroom for live dynamics. A smaller 300W-rated speaker could pair effectively with a PX3-D at 300W x 2, especially where rack weight is a constraint.
China-based manufacturers like AOMEI Audio have become a dominant source for professional audio equipment because of a combination of manufacturing scale, OEM/ODM flexibility, and established certification processes. For businesses building a product line, AOMEI Audio's ability to customize logo printing, packaging, and design specifications makes it possible to launch a branded amplifier line without owning manufacturing infrastructure. Both the PA-H and PX-D series carry CE-E/R and CE-S certification, which matters for buyers shipping into markets that require compliance documentation.
Lead times are also a practical factor: sample orders typically take 2–3 business days, while mass production orders run 7–14 business days after confirmation, with shipping available via express courier, air freight, or sea freight depending on order volume and urgency.
Choosing between a Class H and Class D professional power amplifier comes down to a simple trade-off: raw power and headroom versus weight and efficiency. If your venue, speaker array, or touring schedule calls for maximum output per channel, the PA-H Series is built for that job. If your priority is a lighter footprint, lower heat output, and a 2U rack-friendly build, the PX-D Series delivers comparable reliability in a smaller package.
Before placing an order, confirm your speaker's RMS power rating, measure your available rack space, and request the full specification sheet and certification documents from your supplier. These three steps will prevent the most common sourcing mistakes and ensure the amplifier you choose actually fits your sound system, not just your budget.
What's the difference between Class D and Class H power amplifiers?
Class H amplifiers use a rail-switching design for higher output power and headroom, making them heavier but more powerful. Class D amplifiers switch output transistors at high frequency, producing less heat and allowing a lighter, more compact chassis at a comparable price point.
How much does a professional power amplifier from a China manufacturer typically cost?
Pricing is generally quoted as FOB (Free On Board) and depends on the minimum order quantity (MOQ). Buyers should request a formal quote by providing the item number, quantity, and company profile.
How long does it take to receive an order?
Sample orders typically take 2–3 business days to produce, while mass production orders take 7–14 business days after the order is confirmed. Shipping time varies further based on destination and chosen freight method (express, air, or sea).
Can I customize the amplifier with my own branding?
Yes. Manufacturers like AOMEI Audio offer OEM/ODM services, including custom logo printing and packaging design, typically contingent on meeting a minimum order quantity.
Who should choose the PX-D Series over the PA-H Series?
Buyers who need a lightweight, 2U rack-mountable amplifier for mobile or space-constrained setups, such as touring DJs or rental companies, should choose the PX-D Series. Those requiring maximum output power for large venues should choose the PA-H Series.
