Royer Labs R-dB20 dBooster Class-A In-Line Microphone Signal Booster

Get the gear you want when you want it!

With AMS 0% interest Payment Plans, you use your own credit or debit card, and we will never charge you any interest! We will split your order total equally across the plan that you have chosen. 

Your credit card will be charged every 31 days, automatically. It’s that easy!  Some plans require a credit check.

Customer Service

Free Shipping - No Extra Charge!

Our 4 state-of-the-art, strategically located warehouses are highly efficient and allow us to ship your gear in record time - and most orders will arrive at your door within 2 days for free. Shortly after you place your order, a Ship Confirmation email will arrive letting you know the order was picked, packed, and put on a truck. Full Details

12 Months EXTRA for Free!

Many of our competitors charge 10% or more for an additional 12 months of warranty on the products they sell. AMS offers this exclusive benefit to our valued customers at no extra charge. Thousands of items on our site and in our catalog carry the "Gold Lock Extended Warranty" icon. It means you get the manufacturer's full warranty plus 12 additional months, FREE!!!

Our 45 day return policy allows you to buy with confidence at AMS! If you are not completely satisfied with any item* purchased from AMS, return it to us within 45 days of the shipping date, and we will refund your money or help you with an exchange. That's always been our policy, and now we've added the ease of Electronic Return Labels!

Canadian Shipping Information

Welcome Canadian musicians! Buying your gear from AMS is as easy as going to a local music store, with more selection and more than competitive prices!

Items with this logo are eligible to ship to Canada. Please note that you will be responsible for payment of brokerage fees, duties and other import taxes applicable to your order.

NOTE: Free shipping offers do not apply to Canadian orders. Please be aware of custom fees - such as taxes and duties - when your order arrives. Since these fees vary from location to location, CUSTOMS FEES ARE NOT INCLUDED IN SHIPPING CHARGES. Please check with your local customs office for more information on the fees in your areas. Refusal to pay these fees will result in an undeliverable order. If returned, we do not refund shipping charges and may assess restocking fees to cover return shipping expenses.

Minor Blemished Product

Minor Blemished Products are items that have been returned in excellent condition with very minor cosmetic blemishes, allowing you to get great gear at a discounted price. In fact, many times our customers have difficulty finding the minor blemishes at all! These products are 100% inspected and tested to guarantee functionality. They include all components, manuals and the full Manufacturer's warranty unless otherwise stated, along with the AMS 45-Day Money-Back Guarantee to ensure your satisfaction. Special offers, promotions and rebates may not apply. The following manufacturers do not offer a warranty on Minor Blemished products: Casio, Ampeg, Avalon, Chauvet, Electro-Voice, Epiphone, Gibson, Ibanez, Kramer, Mackie, Maestro, Mesa, Peavey, PreSonus, Steinberger, Tobias

Customer Service

Non Factory Sealed Items

Non Factory Sealed are items that have been opened but are in perfect physical condition such as customer returns, open box for product photos/videos, demo stock, etc. They have been carefully inspected and repacked by qualified AMS employees to help ensure your satisfaction, allowing you to get great gear at a discounted price. They include all components, manuals and the full Manufacturer's warranty unless otherwise stated, along with the AMS 45-day Money-Back Guarantee. Special offers, promotions and rebates may not apply. The following manufacturers do not offer a warranty on Non-Factory Sealed items: Casio, Ampeg, Avalon, Chauvet, Electro-Voice, Ibanez, Mackie, Martin, Peavey

Customer Service