Power amplifiers have grown from simple signal boosters driving speakers to intelligent devices with DSP, speaker matrixes, networked infrastructure, and sophisticated self-diagnostics. Power levels and operational efficiency have increased dramatically along with critical reliability but even the most small and simple units of today are way ahead of previous devices in functionality for size. This survey illustrates how far the muscle end of the sound signal chain has evolved.
We step up to eight channels in a single rack space with the Blaze Audio PowerZone Connect 508, a 500W DSP-equipped Pascal UMAC class-D amp. The PowerZone Control web app enables remote full-matrix DSP configuration and there is hybrid power distribution in both Lo-Z and Hi-Z loads. Other features include S/PDIF input/output, configurable GPIO, and a UREC universal power supply with PFC. Power output on each of eight 8-ohm loads is 60W and on four 70/100V channels the power level is 125W per channel.
A new secret of success for the Ashly Audio MA500.4 is getting power and cooling air where it is most needed on a momentary basis. Features of the MA Series amps include intelligent power sharing with no external units needed to facilitate it. Configured with DIP switches, the system dynamically allocates power to where it is required by asymmetrical speaker loads. It also runs cooling air to the hottest areas in the amp using Ashly’s SailFlow technology. The MA500.4 puts 500W into each of its four channels
In May, AtlasIED announced the expansion of its Atmosphere digital audio platform with the introduction of the AtlasIED Atmosphere AZP Amplifier Series. AZP amplifiers feature onboard DSP with integrated speaker tunings, flexible matrix mixing, and loudspeaker management tools, including EQ, crossovers, and limiters. A built-in message player further enhances system functionality for paging and announcements. Power share technology allows total amplifier power to be allocated across channels in 5W increments, extending system design options. Dual network ports provide flexible deployment options for control, monitoring, and Dante audio, while streamlining system integration and configuration. The AZP series also includes full soundmasking capabilities, with onboard signal generation, scheduling, and commissioning tools, along with CAT-based speaker connectivity for simplified installation of AtlasIED sound-masking loudspeakers.
The Audac WaveDynamics PMQ600 sits at the top of the PMQ Series of 4-channel amplifiers. All of these class D amps have 70/100V output with protection, clip, -20dB level, and signal presence indicators on the front for each channel. Also featured are advanced DSP and loudspeaker management, RS232 control, a 2.5in. LCD display with function knob, and a Dante/AES67 expansion port along with XLR input and link-through connections. The PMQ600 puts 600W into each output channel.
At the other end of the size range, there is the Aurora Multimedia DTX-AMP25-M high-efficiency 25W amplifier designed for Dante and AES67. Simple installation and the ability to be mounted in small areas are assured through its PoE+ powering capability. The integrated OLED display allows access to IP address and critical status readouts. There is also a USB port, an analog audio input, and RS-232 control. The unit’s internal web server provides remote diagnostics and settings control.
InfoComm 2026 saw Bluesound Professional expand its amplifier portfolio with the Bluesound B240Q and B240M Network Streaming Multichannel Amplifiers. Featuring two BluOS zones and four channels of amplification, the B240Q combines music streaming, digital-to-analog conversion, and flexible speaker connectivity within a compact platform. Powered via variable input PoE network connections, it delivers both power and network connectivity over Ethernet. With support for low impedance and constant voltage (70V/100V) speaker systems, the B240Q is suited to large, multi-zone deployments across retail, hospitality, and corporate environments. Its decentralized architecture allows the amplifier to be positioned closer to speakers, reducing cable runs while maintaining centralized control via BluOS. The B240M amplifier builds on the B240Q platform by adding Moodsonic generative biophilic soundscaping capabilities.
The Bogen PS600 Platinum Series mixer amplifier features four dedicated microphone inputs and low-Z/70V/100V outputs. Input channels include one selectable MIC 5/TEL input, one selectable MIC 6/AUX 1 input, and one dedicated AUX 2 input. The front panel presents a 5-band parametric equalizer with individual gain, frequency, and Q knobs. Next to this is an LED level meter with limit and fault indicators. The Platinum Series also has preamp OUT/power amp IN connections to serve as an insert for external audio processing.
Exhibiting the modern versatility of constant voltage and low-Z outputs as well as mic level and line level input, the 300W Crest Audio IPA 2300 has SPS speaker protection and a voltage selector switch for 120V or 240VAC power. The front panel of the 2RU rackmount amp includes power, signal, and SPS indication LEDs along with input level controls. Input 1 level sensing mutes input 2 with threshold/defeat control and there is a high-pass filter to protect speaker transformers from low-frequency overload.
The versatility of all the new amp features and functionality can be seen in the Extron NetPA U 2008 FX eight 200W per channel configurable output amplifier with Dante and DSP. The single rack space unit can be software configurable to put its power into 8 ohms, 4 ohms, 70V, or 100V on each channel. The input signal can come in through analog line level inputs or from Dante channels. Onboard DSP provides a 16×20 mix matrix.
For small and medium-sized environments with many sound zones, the Crown Audio CTD-8125 offers eight 125W channels with power sharing among them, Lo-Z/Hi-Z switching, DSP, and Dante networking. Its entire 500W can be shared in any ratio and factory JBL speaker tunings are featured. The web interface enables remote configuration without installation of custom software and all of these features and functionality are designed into a single RU rack housing.
The company long known for its control systems has also produced the Crestron AMP4600 4-channel power amp with 600W per channel, designed to work with the Crestron Avia family of digital signal processors. The amp works in stereo or bridged mode and handles 70/100V and low-Z loads configurable separately on each channel. Networked connection allows the unit to be remotely controlled and configured with the Avia Audio Tool software and by using a touch screen control panel or mobile device.
Big power in a single rack space unit is one of the goals of the modern power amp evolution and the Biamp Systems Voltera D2400.4 demonstrates how this is done. This class D unit delivers 2400W into four channels supporting a variety of low impedance loads in addition to 70/100V constant voltage speaker systems. Its capabilities include working with AVB, Dante, and AES67 networking and its ALAMOS preset library has over 700 loudspeaker profiles. Integrated precision DSP includes routing, EQ, filters, delay, and protection.
Made by an inMusic company, the Denon Professional DN-280 is designed for paging, P.A. announcements and background music in small spaces. This Class D 100W mixer amplifier can operate through 4-ohm or 70/100V speaker systems. The output is summed mono and the front panel includes a 3.5mm mini TRS aux input and an XLR mic input for announcements. The unit is short-circuit protected and front panel LED indicators show signal present, clipping status, and thermal interruption.
At top of the new IX Series, the Dynacord IX60:8 spreads 6kW power over eight channels as needed, using its powerTANK technology to dynamically allocate it. Speakers of different sizes can be fed with the right power level for each one. There are eight Dante inputs and outputs in addition to a 16×16 matrix mixer, and eight mic/line inputs that can be used as Dante break-in points. Also featured are EQs, dynamics, Dynacord FX and FIR-Drive capability, and pilot tone detection. Working independently of mains power, ghostPOWER on PoE maintains the entire DSP, the Dante network and all active mic/line inputs. It is loaded with other innovative functions as well.
The four-channel 4x4000W class D EAW UXA4416 is made to support KF, SB, and MW series Professional Systems and it does so with 96kHz, 40-bit floating point DSP and EAW Greybox presets, a 4.3-inch touch screen display, primary and secondary Dante on two Gigabit Ethernet ports, and system-wide network control including configuration and monitoring using EAW Resolution 2 software. The amp can operate worldwide on its universal PFC power supply.
With 4800W in a single rack unit footprint, the Lab.Gruppen IPX 4800 simplifies setup and configuration with 50 presets and it adds a four-channel input mixer for multi-input mixing and switching. The backlit front panel touch screen allows operation with setup navigation buttons for Menu, Back, and Mute. Networked control is enhanced by auto-discovery and amplifier identification. DSP features 40 real-time multislope parametric EQs. There are both AES3 and analog inputs with redundant failover.
Eight channels with 160W each, a single rack space, selectable highZ (70-100V) or lowZ load matching on each channel, and versatile internet connectivity are strong points of the LEA Professional CS 168 power amp. On this model, network connectivity comes in three flavors with integrated Wi-Fi, venue Wi-Fi, and a direct rear panel Ethernet port. This allows configuration, control, fault monitoring, and alerts from remote points including phones, PCs, and other Cloud devices through an LEA Cloud account.
The Martin Audio iKON iK81 is designed for Martin Audio loudspeakers and it’s a dedicated controller amplifier for the WPM, O-Line, XE300, TORUS 8 and FlexPoint systems. This Class D amp handles large venues and acoustic spaces with 10kW spread across 8 channels at 1250W each. This 2RU unit can use power globally with 85V to 240V auto-sensing and it provides analog, AES3, and Dante (AES67 compatible) digital audio network inputs. Martin Audio VUNET software is used through an Ethernet port for system control and monitoring.
Another heavy duty 8-channel, two RU powerhouse is the QSC MPA-Q 8×250 and as the name implies, it can send 250W to each channel. Its eight line level audio inputs can be sent to direct outs or routed to Q-SYS while its two network ports allow redundant connectivity. If networked connections fail, the standalone mode switches to available analog inputs. PoE preserves settings on power loss and Low-Z/HighZ/70V/100V are available on all outputs. Interfacing includes Four GPI inputs and two NO/ NC output relays.
For those venues or touring groups with RCF speaker systems, the RCF KPS 808D Class D 6400W power amp with integrated signal processing offers presets for quick setup and configuration. It also has an integrated a four-channel Audinate Dante AoIP network interface, wireless access point, wired Ethernet port, programmable output GPO, and constant voltage/LowZ system compatibility. DSP can be set up and configured through RCF’s RDSpace software. The Ethernet connection enables it to work in distributed systems with independent zone control
At the other end of the sound muscle spectrum is the RDL RU-PA518 mixer amp with A and B inputs sending 9W stereo into 4 ohms or 18W mono into 8 ohms. It has RCA connections for unbalanced input connections and terminal strips for balanced hookup. The unit runs on a DC power adapter or on a 24VDC power terminal. The rear panel includes a stereo/bridge mode switch and a switchable limiter. The front has A/B input volume knobs along with an LED power indicator next to the power switch and a peak limit light.
Special to the company’s sound gear and intended for maximum flexibility of their speaker systems, the Renkus-Heins SA Series amplifiers have networking and RHAON II control and monitoring. Analog, AES/EBU, or Dante can be input connected. Among the three models, the SA-625 outputs 500W + 125W, the SA-1250 provides 1000W + 250W in two-way configuration and 500W + 500W + 250W in three-way mode, and the SA-2000 can be set up for one 2kW channel into 4 ohms, 2 channels of 1000W each into 8 ohms, or Power Amplifiers 3 channels with 1000W, 500W and 250W into 8 ohms each.
A lot of extra wiring runs can be eliminated by mixer amps and the Speco Technologies PBM120A PA mixer amp adds IR remote control and an RS-232 connection for integration with 3rd party control systems. It can connect with 5 zones of 70/25V speakers or use its non-zoned 4/8/16 ohms output capability. There are individual channel input level controls, bass and treble knobs, and a master output gain control. A telephone paging input and music-on-hold output are also among this model’s features. Phantom power is available on all mic inputs.
High power stereo output into a 4-ohm load is the specialty of the Class D TOA Electronics DA-250D with 85% efficiency. The forced air cooling allows up to five units to be stacked with space between them and the design has an independent power supply for each channel. Selectable stereo or bridged operation can be used and there are removable dust filters along with comprehensive protection circuitry. The housing is black aluminum alumite.
Making their debut at InfoComm 2026 is the Yamaha XMS Series of multi-channel amplifiers. Each unit allows power sharing across four channels in virtually any combination of output modes. The series features built-in DSP as well as matrix routing, making signal routing flexible. Eight model variations are available, including both analog and Dante options. Yamaha XMS amplifiers are available in both 4-channel and 8-channel configurations.
