SMP300 Mono-Channel 500w (4Ohm) Class D Subwoofer Amplifier
OSD Audio's SMP300 is a Class D digital mono subwoofer that delivers up to 500W of peak power to beef up the bass in your home theatre or audio sound system. Designed for use with passive subwoofers such as in-wall subs that require external power, the SMP300 provides continuous, stable power but measures only 3' high so it can fit inside any equipment rack or cabinet. Moderately priced with high-end features, this compact sub amp enhances the low frequency sound effects on music and movie soundtracks so you’ll experience highly accurate bass and a more intense surround sound experience. The SMP300 includes variable low pass filter control for balanced and seamless sound quality as well as variable phase control for additional fine tuning. Multiple connection options include LFE input, line-level and speaker-level inputs to cover newer and old school source equipment.
Variable Low Pass Filter A front-panel variable low pass filter allows you to adjust the upper frequency limit of the subwoofer to control the overlap of the subwoofer's upper frequencies and the main speakers' lower frequencies. This results in bass that complements the sound from the main speakers rather than overpowers.
Variable Phase Control The SMP300 also includes a front-panel variable phase control knob that operates over a range from 0 degrees to 180 degrees and allows you to match the arrival times of the sound waves from the subwoofer and the main speakers. This fine-tuning results in bass that is less muddy or thumpy but rather smooth and detailed. Many amp subwoofers in this price range include a variable phase switch that does not offer the same amount of audio precision.
Class D Amp Technology The SMP300 uses Class D digital amplifier technology that combines the best qualities of both Class A and B amp protocols into a highly efficient compact chassis that is ideal for budget-minded users who want a feature-rich digital sub amp that does not run hot or take up a lot of space.
Why Do You Need Subwoofer Amp? A powered subwoofer has its own internal amplifier. A passive subwoofer requires external power, and most in-wall subs are passive. After all, it's not so easy to install a 100-pound powered subwoofer inside a wall. That's where an amp like the SMP300 comes into play. This amp not only adds necessary power but routes LFE away from your surround speakers, which in turn gives you much cleaner highs and midrange. This subwoofer amp does much more than supply power. It also improves the overall sound quality of your entire surround sound system.
A compact and powerful digital subwoofer amplifier for home theatre applications
Efficient Class D digital technology runs cool under demanding loads
Rated at 500W peak power and 250W continuous RMS
Includes front-panel variable low-pass filter for balanced and accurate bass
Additional front panel controls include phase and volume
Multiple input options for older and newer receivers and pre-amps
Auto sensing feature turns off amp when signal is undetected
Dual voltage switchable (120V/230V)
Amplifier Type: Subwoofer
Amplifier Class: Digital Class D
Power Output: 500 Watts @ 4 Ohm
Power Handling: 8 Ohm RMS Rating (Watts): 150 Watts
Power Handling: 4 Ohm RMS Rating (Watts): 250 Watts
Frequency Response: 20Hz-160Hz +/-1dB THD: 1%
Variable Crossover: 35Hz-180Hz
Variable Phase Switch: 0 to 180 Degrees
Impedance: 8 Ohm and 4 Ohm Stable
Signal to Noise Ratio: 95 dB
12V Trigger Mode
Inputs: Speaker (High) Level / Signal (Low) Level RCA
Rack Mountable: 1U Rack Space Style / Mounts Included
Dimensions (L x H x D): 16.25" x 3" x 9.25"
Weight: 7 lbs
Warranty: 2 Years
Our FREE UK delivery applies to all orders over £50, if your order is under this value we charge a flat rate of £10, regardless of size or UK location. In some cases or areas delivery may be on a 2-3 days service, we will contact you if this is the case to confirm you are still happy for us to process your order.
An 'In-Stock' Item or Order will be shipped from either our stock holding or from our suppliers stock, in most cases we will use UPS or EVRI, as they offer the best value services locally. To receive these updates you will need to provide us with your email and mobile number. We also recommend you download their app for regular delivery notifications.
We do not take any payment from you until we have confirmed your order as available and ready to be packed & shipped. The system will however pre-authorise your payment. If it is a custom order for NextLevel Acoustics, we will await order confirmation from the factory that everything is ok and then collect payment.
Orders placed before 12pm, Monday to Friday,will usually be shipped within 48hrs, on a 24Hr service.
Orders placed after 12pm will usually be processed by 12pm following working day, but we will make every effort to get it moving sooner.
Custom Orders from NextLevel Acoustics typically take 4-5 weeks to be manufacturer and shipped to the UK. Once we receive it, we will check it over completely and then arrange for delivery to you.
Shipping services are based on working, business days (Mon – Fri, Excluding Bank Holidays), Orders placed on a Friday will not arrive until Monday unless we arrange a paid-for, weekend service for you.
All deliveries will be to your registered card address and will be a signed for service. If the item cannot be signed for we instruct our couriers not to leave the order. This protects both you and us from orders that go missing.
Where an order cannot be shipped on a 24Hr service, due to size or weight, or because of stock supply, we will contact you to discuss the process and agree a solution.
AmericanAudioCo Packing Elves
We want you to be completely happy with your purchase from the American Audio Company. We are sure that through reading our website (as well as others) and calling on our expertise where needed, you will create an order you will be really happy with.
But we do understand that your needs or the requirements of your system may change, this is why our unique 45 day Policy* makes returning a product you have purchased from us quick and easy.
Inportant Note for Custom Orders If you order a Custom Speaker Bar, to be supplied by NextLevel Acoustics, we arrange manufacture to your exact specification. Before the order placed with the factory we will send you a specification form, complete with your details and requirements. Please check these thoroughly and sign to confirm the specification and the configuration you require. In accordance with UK consumer law, you can not return any custom made products for a refund.
Order Received. When your order is delivered, please check your purchase thoroughly and as soon as possible, you must advise us of any discrepancies, missing components or damage within 3 business days of delivery. Any such claims after this cut off cannot be rectified.
When unpacking & checking your order, please take care to maintain its condition and all of its packaging, including any accessories, operating & installation manuals. We want you to be completely confident in the products your receive from us and to be 100% satisfied with it, please DO NOT install or configure any part of your order unless you are completely happy with it all. Set Up or Installation could affect the performance or restock condition of your order.
If you no longer wish to keep a product, you can arrange to return it to us within 45 days of its delivery, subject to the following policy:
Within 14 days** : We will refund, exchange or credit your American Audio account with the full purchase value of the item or items returned, according to your requirements.
Between 15 & 28 days*** : We will exchange and / or credit your American Audio account with the full purchase value of the item or items returned.
Between 29 & 45 days**** : We will credit your American Audio account with a maximum of 70% of the purchase value of the item or items returned.
To return items, you must request a RMA authorisation & reference number from American Audio Co, using email@example.com. Hopefully we will have spoken to you before this to try to rectify any issues and this should make the process easier. Items must arrive with us within 7 working days of the RMA Issue, unless agreed by us in writing (email only)
* Not Applicable for CUSTOM ORDERS from NextLevel Acoustics.
** 14 Day Refunds will be credited within 7 business days of us receiving & testing the product, We will only use the original method of payment.
*** Any of your items returned within 28days can be exchanged for another from our store, of equal value or higher. If higher you will be asked to pay the difference before we arrange shipment. If lower we will issue a credit note for any outstanding balance that you can spend in our store at a later date.
*** Items returned to us between 29 and 45 days from the date of delivery will be subject to a minumum of a 30% restocking fee, dependent on its completeness and condition at point of return. This will be deducted from the original item value and raised as a credit note issued to your account.
The only cost to you will be the insured postage costs that you will incur in returning the product to us. We strongly advise you to return any item to us using the full insured value.
Please note that our unique 45 day returns policy applies only to transactions where you are an UK or EU Retail Consumer. Transactions that are for UK or EU Businesses (trade sales), and all customer orders from outside of the EU, are non-returnable and non-refundable unless otherwise agreed in advance.
Product Faults. In the unlikely event that you wish to return a product because of an error on our part or because it has been received damaged / defective at point of delivery, We will discuss the options with you for exchange, credit or upgrade! and arrange a collection by our couriers or agent. We will confirm with you the full details before any pickup occurs and items must be returned to us in their original packaging and with all their accessories and manuals. You must still notify us within 3 Business Days of Delivery and we will start the returns process from there.
Products that fail due to a manufacturing fault within 28 days, from the day of delivery, will be exchanged for the same make and model where possible. We will ask you to arrange the return of the faulty item to us for testing before the replacement item is shipped. Initially this will be at your cost, however, if the item is faulty we will agree, arrange your replacement and credit you or your account with the shipping cost (proof of cost required). We check and test all items returned as damaged or defective. In the event the item is NFF (No Fault Found), we reserve the right to return the original item to you and refuse to refund the postage costs you incur in shipping it to us.
Products that fail due to a manufacturing fault on the 29th day or more from the day of delivery (but still within the product’s guarantee period) will be repaired or replaced at our discretion. The only cost to you will be the insured shipping costs that you will incur in returning the product to us. In all cases we strongly advise you to return any item to us using the full insured value.
Ultimately, if you wish to return a product purchased from us we would like to talk to you first. After that, initiating the return process will be done using a completed RRA form which we will send to you with much of the info needed already completed. We will ask you to complete any outstanding information, signing it to confirm you understand the process identified here and any of your liabilities, and then email it back to us within 3 Business Days of issue. We will then reply to you by email as soon as possible to advise you of a returns identification number (so we can identify the returned package) and confirm any other return details you may need.
Products should arrive back with us within 7 days of us providing a returns identification number and instructions or further costs may be incurred.
For any items returned under our Returns Policy that are received back below their originally supplied condition, we reserve the right to return them to you, or to charge a degradation fee. We therefore ask that you ensure any items are complete and cartons are suitably protected from additional damage as best you can.