Starkrimson Ultra Mono Amp Module x 2


500W GaN Audio Monoblock Power Amplifier Module. Perfect for the do-it-yourself (DIY) enthusiasts.

The price is for two (2) modules.

In stock

Starkrimson® Ultra Mono Amp Module

Starkrimson amps are state-of-the-art (SOTA) hi-fi audio power amplifiers conceptualized to provide the listener with a truly life-like musical experience, presented with every significant detail intact, to convey an emotional connection to the music.

Starkrimson Mono amps utilize gallium nitride (GaN) technology to achieve ultra-high performance in an easy-to-use small package that will easily blend into any décor.

Perfect for the do-it-yourself (DIY) enthusiasts and tinkerers. This state-of-the-art (SOTA) audio amplifier module uses the latest gallium nitride (GaN) technology to achieve low noise and distortion.


  • Instructions
  • Mechanical Dimensions
  • Protection Circuit Explained
  • Wiring to Power Supply


  • Gain Balanced Input: 19.05dB
  • Gain Single-Ended Input: 25.05dB
  • Signal-to-Noise Ratio (SNR): 120dB (A-weighted, 22kHz BW)
  • Residual Noise: 44.72uV (A-weighted, 22kHz BW)
  • THD* @ 10W: <0.0004% (-108dB) for 1kHz into 8Ω
  • THD @ 0.25W: <0.0016% for 20Hz – 20kHz into 8Ω
  • THD @ 10W: <0.0006% for 20Hz – 20kHz into 8Ω
  • THD @ 62.5W: <0.001% for 20Hz – 20kHz into 8Ω
  • THD @ 250W: <0.016% for 20Hz – 20kHz into 8Ω
  • THD @ 10W: <0.0005% (-106dB) for 1kHz into 4Ω
  • THD @ 0.25W: <0.0021% for 20Hz – 20kHz into 4Ω
  • THD @ 10W: <0.0007% for 20Hz – 20kHz into 4Ω
  • THD @ 125W: <0.0018% for 20Hz – 20kHz into 4Ω
  • THD @ 500W: <0.08% for 20Hz – 20kHz into 4Ω
  • SINAD** @ 5W 1kHz: 102.5dB into 16Ω
  • SINAD @ 5W 1kHz: 100dB into 8Ω
  • SINAD @ 5W 1kHz: 97dB into 4Ω
  • Frequency Response: DC – 80kHz+
  • Sensitivity Balanced Input: 5Vin for 250W into 8Ω
  • Sensitivity Balanced Input: 5Vin for 500W into 4Ω
  • Sensitivity SE Input: 2.5Vin for 250W into 8Ω
  • Sensitivity SE Input: 2.5Vin for 500W into 4Ω
  • Balanced Input Impedance: 44kΩ
  • SE Input Impedance: 22kΩ
  • Output Power (16Ω): 125Wrms (250Wpeak)
  • Output Power (8Ω): 250Wrms (500Wpeak)
  • Output Power (4Ω): 500Wrms (1000Wpeak)
  • Damping Factor: >700 @ 1kHz
  • Module Size:  4.95″ (125.7mm) x 3.75″ (95.3mm) x 1.45″ (36.8mm)
  • Module Weight: 8.75oz (248g)
  • Power Supply Input Voltages (modules):
    • +/-36V (+/-30 to 42.5V) – Amplifier Power Rails
    • +15V (11 to 16V) – MOSFET Driver Supply – Referenced to -36V rail – 100mA minimum
    • +/-18V (+/-15 to 22V) – Analog Supplies – 100mA per supply minimum

*THD – Total Harmonic Distortion

**SINAD – Signal-To-Noise and Distortion Ratio

In the box: 2 x Starkrimson Ultra Mono Amplifier Module

Product Datasheet and Manual

If applicable, the Product Documentation such as Datasheet, Brochure, Reference Materials, CAD Design, STP Files, Manuals, and Tutorials will be available for download upon purchase from the My Account as needed. On the checkout page, please create an account to download product-related files upon purchase. You won’t be able to download otherwise.


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

At Orchard Audio, we believe that listening should be an experience. With a range of expertly designed, high-performance DACs, streamers, and amplifiers, we’re helping you elevate the sound in your home theater, listening room, or recording studio. As passionate music lovers, we know how important your music is to you — that’s why each of our products is handcrafted in the US with you in mind.

Shipping Policy

Please check your SPAM folder to ensure you accept emails from to receive your tracking number and download product-related files.

WE SHIP WORLDWIDE: We primarily ship via FedEx, UPS, DHL, and USPS because they’re reliable, fast, and easily trackable. We usually ship within two to three business days after the full payment. Standard delivery generally occurs within 5 to 7 business days after the shipping date. However, the delivery may take about 7 to 10 business days, depending on the shipping destination, logistics, weather conditions, product weight, size, or shipping company distribution structures.

SHIPPING COSTS: For some industrial products, e.g., heavy wheels, CNC machines, etc., the shipping cost is calculated based on the product weight, not quantity. To benefit from lower shipping costs for orders with multiple items, please contact us at Our shipping rates are listed clearly on each product page under the SHIPPING tab. Additionally, to see the shipping cost for your country, add the item to the Shopping Cart; you will see the shipping cost based on your Country and Location.

CUSTOMS and TARIFFS: While not all products require a tariff, some products may require a minimal tariff if applicable in your country. The total amount for your order does not include a customs fee/tariff. A tariff belongs to the buyer when applicable. Why don't we add tariffs to the product's retail price? - If all countries deducted the same tariff amount, we would have added the tariff amount to the product price. However, we do not do that because each country charges a different amount, while some do not even charge. Therefore, we can't add any tariff to the product's retail pricing. Oz Robotics, manufacturing partners, or Suppliers are not responsible for tariffs. Please check the "Made In:" and "Brand:" labels on the product page to see the product's origin. The total amount for your order does not include any duties, import taxes, customs fees, and GST/VAT. The buyer must pay all import duties. If you choose not to pay the tariff and parcel returns, there will not be any refund. Please click here to see more on Tariffs.

Return Policy

WITHIN 5 HOURS: Mistakes happen when ordering, so you have 5 hours to request an order cancellation, but we cannot refund the PayPal or Stripe Processing fee because they do not refund us.

AFTER 5 HOURS: After 5 hours, your order has either been shipped, prepared to ship, or custom-made. If you still want to cancel your order after 5 Hours, we will deduct 30% of the total for restocking + PayPal or Stripe processing fees and the Return Shipping cost for unopened packages.

AFTER RECEIVING YOUR ORDER: If you decide not to keep your order after it arrives, we will deduct 80% of the total if we find it refundable after a review. Please see our Refund and Replacement Policy

EXCHANGE POLICY: Oz Robotics wants you to be happy with your new purchase. However, we abide by the exchange policy of our suppliers because we do not manufacture these products; our suppliers do. Once you use the product, our supplier(s) and we have the right not to issue a refund. Still, we will offer an exchange for wrongly purchased items or products with serious and irreversible defects or technical problem(s). The buyer will pay the shipping fee for wrongly purchased products or similar issues. If the product you purchased is defective, please email us at with photos or a video of the defective parts to evaluate before you send it. Click HERE for more on Refund and Replacement Policy

REFUND POLICY: Oz Robotics accepts refunds on a minimal basis unless there is a manufacturing defect. For electronic items, returns are only accepted on devices with serious and irreversible problems; meanwhile, the customer must apply for the returns within seven days of delivery. Before a refund acceptance, please include images or a video and any other proof of the defect. However, we abide by the exchange policy of our suppliers because we do not manufacture these products. For more info please visit Refund and Replacement Policy.

Other than our supplier's default policy, once a return is agreed upon, you can ship your defective item to the provided return address that you should receive from us first. Please ship the order in original packaging with all the accessories and additional parts. If the Required Parts are not sent back, they will be billed for or expected to be shipped later. And only once all items have arrived will our staff check the returned product for testing. Include in your package a signed letter stating the reason for your return, the original receipt, proof of defect, images, a video, etc. It will help us to speed up the process on your behalf.

The purchaser (customer/buyer) is responsible for all shipping costs when returning an item. However, upon receiving the returned order, we will assess the product. If it is determined that there is, in fact, a manufacturing defect, then we will refund the shipping costs as well as repair or replace or refund the full amount to the purchaser if the product is not fixable.

If you wish to return an unused product, please do so within seven days from the ship date for a refund on the purchase price minus shipping and handling. Refunds will be credited to the original credit card used for payment 24-48 HOURS after receiving the product back. We will charge a 80% of the total for restocking + PayPal or Stripe processing fees and the Return Shipping cost for unopened packages.

Once your return is received and inspected, and if you agree to a refund, refunds will be credited to the original credit card used for payment in 24-48 hours. Please note that we will charge an 80% restocking fee once you return a product without any defect.

Once your refund is processed, PayPal will return the money to the card used. It may take at least five business days (depending on the bank and credit company) before your refund is posted in your bank account and statements. Contact Us if you have not received your refund after five business days.

Do not return your product to our New York office. For any exchange or refunds, please email us first at for us to provide you with the steps that need to be followed. Any product you return must be in the same condition you received and returned in the original packaging without being used. Please keep the original receipt. More on Refund and Replacement Policy.

Shipping costs

Shipping from United States (US)
Within United States (US) Free
Outside United States (US) $75.00