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Everything In Music Since 1958
Everything In Music Since 1958

Ashly KLR-4000 High Performance Amplifier

Original price $1,849.00
Original price $1,849.00 - Original price $1,849.00
Original price $1,849.00
Current price $1,499.00
$1,499.00 - $1,499.00
Current price $1,499.00
♫ In stock
About Inventory Status

Call or text us at 301-946-8808.

In stock: It is in stock and available to ship or pickup. Apparel must be shipped from another location and is not available for in-store pickup. We can usually ship or have these items available for pickup by the next business day if they don't require inspection, special handling, or setup. Our pickup location is 11151 Veirs Mill Rd. Silver Spring, MD 20902.

📆 Preorder: It is on the way to our warehouse. We can't predict when preorder items will arrive due to current supply chain issues. If you place an order for one of these items someone will contact you to estimate the delivery date.

Out of stock: We don't currently have it available but you're not out of luck yet. We still may be able to get it. If you order one of these items we will contact you with an estimated fulfillment date. You have the option to cancel the order if you change your mind.

Special order: The item is so special that it needs to be custom ordered for you. Some of these items are works of art and have to be made individually. Orders for special order items must be prepaid and we cannot accept cancellations or refunds.

█ Sold out: We don't think we can get this item because it was either discontinued by the manufacturer or was limited in quantity. If you want or need this item call or text us. Sometimes we can help you track down the item through other sources or help you find something similar.

About Item Conditions

Call or text us at 301-946-8808.

New: The item is brand new as received from the manufacturer with a full manufacturer warranty. Instruments such as guitars, snare drums, drum kits, brass and woodwind instruments may be opened for photography and quality control inspection and may not be in a factory sealed box.

Mint or Open Box: The item may have been opened and tested but has been repackaged. The original packaging may have superficial issues but the item itself and any originally included accessories are in perfect, like new condition.

Display Model: These items are so cool that we put them on display in our legendary shop. The condition is brand new as received from the manufacturer with manufacturer warranty. Rest assured, these items undergo a very careful inspection before shipping.

Demo: These items have been on our sales floor for demo purposes and will likely show signs of use. The original packaging may no longer be included, but you can be assured that you are receiving an awesome item and an awesome price.

Used: The item is used. These item may have varying degrees of wear. Please read the description for information about the condition of the item. Used items do not carry a warranty.

B or C Stock: Factory refurbished. These items were purchased from the manufacturer in a refurbished condition. They will show some cosmetic issues, but nothing that would impact performance. Being that these are sealed from the manufacturer, we generally do not open these to photograph the cosmetic issues. They are guaranteed to work and may have a limited warranty or you may purchase an extended warranty in some cases. Please see the listing description for item specific information.

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Delivering Quality and Value at an Affordable Price with the Ashly KLR-4000 High Performance Amplifier

Ashly Audio's KLR-Series amplifiers are high-efficiency, lightweight, two-channel, high power amplifiers incorporating the latest technologies. They deliver quality and value for professional performance at an extremely affordable price. Suitable for professional audio or fixed performance installation, these amplifiers are optimized for reliable audio performance with sonic perfection.

Covering a power range from 1000 to 2500 watts per channel at 2 ohms (20Hz-20kHz, 1% THD), the Ashly Audio KLR-2000, KLR-3200, KLR-4000, and KLR-5000 are suited for a wide range of sound reinforcement. All models are optimized to deliver high levels of sustained power, extraordinary audio performance, and road-proven reliability into 2, 4, or 8 ohm loads. They are housed in a uniform, rugged, 2RU chassis. Each KLR amplifier uses a state-of-the-art Switch Mode Power Supply for flawless lows, punchy mids, and pristine highs. The output topology of the KLR-2000 is Class-AB, while the KLR-3200, KLR-4000, and KLR-5000 are a two-step Class-H design. KLR-Series protection circuits include output over-current protection, DC output protection, chassis internal temperature monitoring, inrush limiting, and a mains circuit breaker.

  • Balanced inputs via 3-pin Euroblock and combo XLR/ 1/4" TRS
  • Switch mode power supply for high efficiency and low weight
  • Forced air cooling (front in, rear out)
  • Removable dust filters
  • Front mounted attenuators
  • Front panel indicators for output level, clip/protect, and power on/off
  • Gain selectable switch for both channels
  • Rack ears for permanent installation in a standard 2RU enclosure
  • Neutrik Speakon output connectors
  • 3-position gain switch (1V, 32dB, or 26dB sensitivity)
  • 3-position mode switch (bridged, stereo, or parallel mono)
  • 3-position HPF switch (30Hz, 50Hz, or off)
  • On/off limiter switch
  • Permanently attached power cord
  • Extensive protection circuitry
  • Safety/Compliance: cCSAus, FCC, CE, RoHS


  • Amplifier
    • Number of Channels: 2
    • Power Rating:
      • 8 Ohms: 850 W Peak per Channel (Full Range, 1% THD)
      • 4 Ohms: 1400 W Peak per Channel (Full Range, 1% THD)
      • 2 Ohms: 2000 W Peak per Channel (Full Range, 1% THD)
      • 4 Ohms: 4000 W Peak Bridged (Full Range, 1% THD)
    • Amplifier Class: 2-Tier Class-H
    • Load Impedance / Voltage: 2 / 4 / 8 Ohms per Channel
  • Performance
    • Protections: DC Fault, DC Offset, Overcurrent, Thermal
    • Frequency Response: 20 Hz to 20 kHz +0.3 dB (1 W at 8 Ohms), 5 Hz to 70 kHz -3 dB
    • Damping Factor: > 380 at 8 Ohms
    • Input Impedance: 12 Kilohms (Balanced)
    • Max Input Level: 21 dBu
    • THD: < 0.05% (20 Hz to 20 kHz, 10 dB Below Rated Output at 4 Ohms)
  • Signal Processing
    • Crossover: Yes
    • Filters: 2 x High-Pass (30 Hz, 50 Hz)
    • Limiting: Yes
  • Connectivity
    • Analog Audio I/O:
      • 2 x Block 3-Pin Balanced Line Input
      • 2 x Combo XLR-1/4" 3-Pin Female Balanced Line Input
      • 2 x speakON NL4 Speaker Output
    • Digital I/O: No
    • USB: No
    • Mobile App Compatible: No
      • *As of November, 2022: Check with manufacturer for the most up-to-date compatibility
  • Power
    • AC Input Power: 120 VAC, 60 Hz
    • AC Power Connector: 1 x Hardwired Cord 15 A / NEMA 5-15
    • Current Consumption:
      • 120 VAC: 14 A (1/8 Power, Pink Noise)
      • 120 VAC: 19.8 A (1/3 Power, Sine Wave)
  • Physical
    • Rackmount Size: 2 RU
    • Cooling: 2 x Fan (Variable Speed)
    • Thermal Dissipation: 2489 BTU/hr (Typical), 3516 BTU/hr (Maximum)
    • Operating Temperature: 22 to 72°F / -10 to 40°C
    • Operating Humidity: 0 to 90%
    • Dimensions: 19.0 x 3.5 x 16.0" / 48.3 x 8.9 x 40.6 cm
    • Weight: 26.7 lb / 12.1 kg
  • Packaging Info
    • Package Weight: 33.7 lb
    • Box Dimensions (LxWxH): 19 x 16 x 4"

Manufacturer: Ashly Audio
Model: KLR-4000
SKU: I441998-N-2-WHXE
UPC: 8806326606610

We are Chuck Levin's Washington Music Center

Maryland, Virginia, and Washington DC's legendary music shop. Family-owned and operated since 1958. Buy gear the way it was meant to be bought, from a store that's been there through it all and has the vibe to prove it. We're staffed with musicians and industry experts, people that live and breathe music gear. Our mission is to help you find the right gear for your project, that thing that will bring you the most joy out of what you do. We're an authorized dealer for almost every brand, we stock items the other stores don't, so you can try before you buy. Stop by our Wheaton, MD showroom and see for yourself.

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