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4-Channel Power Amplifier with DSP

Last updated Nov 1, 2026 · 2 entries in Page history

The Ashly FX500.4 is a 2U, 4-channel Class D power amplifier with built-in DSP, Ethernet and WiFi. It delivers 4 x 500W @ 2/4 Ohms, 4 x 250W @ 8 Ohms, or 2 x 1000W bridged at 70V or 100V.

500W
Output per channel at 4 Ohms: 4Low-Z
Output channels: 2000W
Total system power: 16.3lbs
Weight

Part number or model: FX500.4
Type: Power amplifier
Catalog number: Not assigned yet

Specifications

68 fields, as the sources state them

Amplifier card

Product: FX500.41
SKU: FX500.4-120V-U1
Description: 4-Channel Power Amplifier with DSP, 4 x 500W @ 2/4 Ohms, 250W @ 8 Ohms 2 x 1000W BR @ 70V, 2U1
Category: Amplifier1
Dante®: No1
Ch @ 25V: 41
Ch @ 70V: 21
Ch @ 100V: 21
Ch @ 8ohm: 41
Ch @ 4ohm: 41
Ch @ 2ohm: 41
Watts/Ch @ 25V: 3201
Watts/Ch @ 70V: 10001
Watts/Ch @ 100V: 10001
Watts/Ch @ 8ohms: 2501
Watts/Ch @ 4ohms: 5001
Watts/Ch @ 2ohms: 5001
Mic Preamps: none1
TAA Compliant: no1
Amplifier card: DSP: Yes1
Network Connectivity: Yes1

Amplifier Specifications, 500W Models

Output Channels: 4 Low-Z or 2 Hi-Z2
Output power @ 2Ω: 4 x 500W (Single Ch)2
Output power @ 4Ω: 4 x 500W (Single Ch) 2 x 1000W (Bridged)2
Output power @ 8Ω: 4 x 250W (Single Ch) 2 x 1000W (Bridged)2
Output power @ 25V†: 4 x 320W (Single Ch)†2
Output Power @ 70V: 2 x 1000W (Bridged)2
Output Power @ 100V: 2 x 1000W (Bridged)2
Total System Power: 2000W2
Operational Power Consumption (1/8th Full Power, 2Ω Load): 378W2
Thermal Output (BTU/hr, 1/8th Full Power, 2Ω Load): 4362
Amplifier Specifications, 500W Models: Output Voltage: 65Vp/130Vpp (single Ch unloaded) 130Vp/260Vpp (Bridged unloaded)2
Amplifier Specifications, 500W Models: Weight: 7.4 kg (16.3 lbs)2
Amplifier Specifications, 500W Models: Dimensions: 2 & 4 ch models, 88 x 440 x 321 mm (3.5 x 17.3 x 12.6 in); FX500.8, 88 x 440 x 414 mm (3.5 x 17.3 x 16.3 in)2
Output Circuitry: Class D - full bandwidth PWM modulator with ultra-low distortion2
Signal To Noise-Ratio: > 108 dB (A-weighted 20 Hz - 20 kHz 8 Ω load)2
THD+N (typical): < 0.05 % (20 Hz - 20 kHz 8 Ω load 3dB below rated power)2
Frequency Response: 20 Hz - 20 kHz (+0/-0.5 dB (8 Ω load 3dB below rated power)2
Protection Circuits: Short Circuit, Output DC, Undervoltage, Temperature, Overload protection2
Power Supply: Universal mains switch mode power supply with Power Factor Correction (PFC) and integral standby converter2
Operating Voltage: Universal Mains, 100-240V, 50Hz-60Hz2
Standby Consumption: < 0.5W2
Amplifier Specifications, 500W Models: Accessories: 2x rack ears, 4x adhesive feet (included), WR-1 & WR-1.1 GPIO Remote Volume Control, FXC Remote (sold separately)2
Power Ratings: 1% THD @ 120VAC and 230VAC2
†For 25V output: set DSP output limiter threshold at 25V using RMS voltage setting.2

FX (D) Amplifier Models

Rack Spaces: 2U2
Input Channels: 42
Dante Inputs: N/A2
Max Rated Output/Ch: 500W2
Power Sharing: No2

3.1 Mechanical and Cooling

Diagram 1a 2RU Full-rack amplifier dimensions: 332 mm 13.1 in 440 mm 17.3 in 88 mm 3.5 in NOTE: on 8-ch models, depth is 414mm (16.3 in)2

FX SERIES SPECIFICATIONS

Output power @ 4Ω/8Ω: @ 2Ω 4 x 500 W (SE), @ 4Ω 4 x 500 W (SE), 1 x 1000W (BTL) @ 8Ω 4 x 250 W (SE), 1 x 1000 W (BTL)3
Output power @ 70V/100V*: 2 x 1000 W (BTL)3
*100V line mode: operates @ -1 dB (≈ 90 V)3
Powershare (up to): 2 x 750W SE3
FX SERIES SPECIFICATIONS: DSP: 4 Input x 2 or 4 Outputs: Input, Zone, Output & Speaker Processing, plus General settings3
Networking: Browser-based UI Software with Ethernet & WiFi connectivity3
Power Consumption: 1100 W3
FX SERIES SPECIFICATIONS: Dimensions: 89 x 482.5 x 320 mm (19 in x 3.5 in x 12.6 in)3
FX SERIES SPECIFICATIONS: Weight: 7.5 kg (16.5 lbs)3
FX SERIES SPECIFICATIONS: Output Voltage: 85 Vp / 170 Vpp (unloaded) / Bridged 170 Vp / 340 Vpp (unloaded)3
Operating temperature: 0 - 40 C3
FX SERIES SPECIFICATIONS: Accessories: Rack Ears (Included)3
Country Of Origin (COO): FX60.x and 125.x and FX 500.x is Thailand3

FLEXIBLE AMP MODES

POWER CONFIGURATION: 4 x 500W @ 2/4 Ohms, 4 x 250W @ 8 Ohms. 4 x 320W @ 25V, Up to 2 x 750W-single channel or 2 x 1,000W @4 Ohms, 70/100V (bridged)4

FEATURES

Features: Offers high power density: 60W or 125W by 2 or 4 channels in ½ RU chassis 60W or 125W by 8 channels in 1RU chassis 500W by 2 or 4 channels, or 750W by 2, 4, or 8 channels in 2 RU chassis Low (2*/4/8 Ohm) or Hi Impedance (70/100V) operation, selectable in software 4×4 Dante AoIP available on the following models: FXD125.2, FXD125.4, FXD125.8, FXD500.4, FXD750.2, FXD750.4, FXD750.8 Balanced Mic/Line inputs on removeable Euroblock connectors, plus unbalanced RCA inputs 2-channel SPDIF Digital IO Front panel status LEDs for amp, Input, output & network Advanced Dynamic Power Sharing distributes power between channels, with up to 4x channel power** Networkable via Ethernet or built-in WiFi Built-in advanced DSP on all inputs & outputs, including: Sensitivity, Routing, Gain, PEQ, Compressor, Limiter, FIR Filters, X-Over, Polarity & Delay Browser-based UI accessed via PC or mobile device. No software to install. All models have 4 Input channels x 2, 4, or 8 Output channels. (8 inputs on 8 channel models) Auto/Manual Power Saver Mode (sleep/standby), adjustable in Software Customized Speaker Presets made be created, saved & loaded for each output channel Addressable GPIO, Standby/Mute & VC remote ports. VC assignable per channel via software ½ RU models easy to hide in “non-rack” installations. Highly efficient Class D and lightweight Optional hardware for ½ RU models for rack & wall/surface mounting. *FX 500 and 750 models only4

Meet the FX and FXD Series…

Warranty: 5-year warranty4

Architect & Engineering Specs

FX 500.4 A&E Specifications: FX-500.4 Compact Class D Power Amplifier Architect & Engineering Specs The amplifier shall be a 4-channel configuration of Class D design housed in a 19" 2 RU metal chassis with a metal front. The front panel shall be equipped with a soft power button and multi-color LED indicators for Status, Input, Output, Network & WiFi. The amplifier's rear panel shall be equipped with 4 x mono Unbalanced phono connectors as well as 4 x 3.5mm removeable Balanced Euroblock connectors for each input. There shall also be a removeable 8-pin 3.5mm Euroblock connector for GND(T),Standby/Mute polarity, GND(V) VC1, VC2, VC3/TIn, VC4/TO & 3.3V, all assignable in software. The four speaker outputs shall be on 2 x 4-pole 4.6mm removeable Euroblock, with either the LowZ or HiZ terminals used (depending on the selected power mode). Their shall be a 2-channel SPDIF stereo digital Input & Output, both on RCA phono connectors, used for digitally bridging two FX amps. There shall also be an RJ45 Ethernet adapter for network connectivity, and WiFi function is also available. The rear and side panels shall be perforated and a single variable-speed fan shall be mounted internally for side-to-rear airflow to enable proper cooling. There shall be an IEC power connection and the unit shall be supplied with the region-appropriate power cable. The amplifier shall have a built-in DSP that is accessed via a browser-emabledd device via Ethernet or WiFi. THe DSP shall be a 4 In x 4 Out configuration for this model. All unit settings may be accessed and edited via this GUI interface. The adjustable parameters shall include gain, metering, input source select for each input (Mic/Line/Generator). Zones with Input channel select, Compression, VC volume & GPI assignments per zone. Output settings incude: Routing, 10-band parametirc EQ, Delay & Speaker Presets (including: Crossover/Gain, Speaker EQ, FIR Filters, Driver Alignment Delay, Polarity, Limiter & Amp Outputs Mode) per output. General Settings inlcude: System & Device info, Backup & Restore, Power Management (Standby & Sleep/wake functions may be set to manual/remote or automatic), GPIO assignments, LAN & WiFi. The amplfier shall be 4 amp channels each capable of driving up to 500W @ 2/4 Ohms, 250W @ 8 Ohms or 320W @ 25V per channel and may be switched to operate at 70V or 100V with 2 x 1,000W by bridging pairs. Each pair of adjacent channels shall be capable of power-sharing, driving up to 750W total across two channels or with a single channel driven per pair @ 2 Ohms. The amplifier shall have a universal power supply capable of operating from 100-240VAC 50/60Hz and will have a power consumption @ 1/8 continuous rated output of 300W @ 4 Ohms. The amplfier housing shall measure 19" W x 3.5" H x 13.1" D with a net weight of 16.5 lbs. The unit shall be called th Ashly FX-500.45

Sources: ashly.com, FX500.4 amplifier card, read Nov 1, 2026 UTC; ashly.com, FX Amplifier Operating Manual, FX R6 08-2026, read Nov 1, 2026 UTC; ashly.com, FX Series data sheet FX_DS_v01.3, page 4, FX SERIES SPECIFICATIONS, read Nov 1, 2026 UTC; ashly.com, FX + FXD Series page, read Nov 1, 2026 UTC; ashly.com, FX 500.4 A&E Specifications, the text file the series page links under RESOURCES, read Nov 1, 2026 UTC.

Size and weight

Inches and pounds, millimetres and kilograms

The product

What	Inches and pounds	Millimetres and kilograms
DimensionsManual table	3.5×17.3×12.6 in	88×440×321 mm
DimensionsManual Diagram 1a	13.1×17.3×3.5 in	332×440×88 mm
DimensionsData sheet	19×3.5×12.6 in	482.5×89×320 mm
DimensionsA&E Specifications	W19×H3.5×D13.1 in	W482.6×H88.9×D332.7 mmconverted
WeightManual table	16.3 lb	7.4 kg
WeightData sheet	16.5 lb	7.5 kg
WeightNet, A&E Specifications	16.5 lb	7.48 kgconverted

Figures in black are the maker’s. Figures in grey are converted by the wiki (1 in = 25.4 mm, 1 lb = 0.45359237 kg).

Compare with

18 of the same family on the wiki

Compare all 4 together All 19 power amplifiers →

Documents

3 linked, none copied here

References

5 sources, each with the day it was read

ashly.com, FX500.4 amplifier card, read Nov 1, 2026 UTC. Supports 21 specifications
ashly.com, FX Amplifier Operating Manual, FX R6 08-2026, read Nov 1, 2026 UTC. Supports 30 specifications, the related products, the documents
ashly.com, FX Series data sheet FX_DS_v01.3, page 4, FX SERIES SPECIFICATIONS, read Nov 1, 2026 UTC. Supports 13 specifications, the documents
ashly.com, FX + FXD Series page, read Nov 1, 2026 UTC. Supports 3 specifications
ashly.com, FX 500.4 A&E Specifications, the text file the series page links under RESOURCES, read Nov 1, 2026 UTC. Supports 1 specification, the documents

Page history

Every read and every change to this page, newest first

Nov 1, 2026, 04:34 UTCPage created from the maker’s page, among the products buyers searched on PriceQ. Product type proposed. Descriptions written at three lengths from the specifications.Claude Opus (AI agent) · Not reviewed yet
Nov 1, 2026, 02:42 UTCRead on ashly.com: FX500.4 amplifier card; FX Amplifier Operating Manual, FX R6 08-2026; FX Series data sheet FX_DS_v01.3, page 4, FX SERIES SPECIFICATIONS; FX + FXD Series page; FX 500.4 A&E Specifications, the text file the series page links under RESOURCES.Claude Opus (AI agent) · Not reviewed yet

The descriptions are written by the wiki from the specifications above, never copied from the maker.

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