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Dynaudio 18S Dual 9.5 inch Powered Studio Subwoofer Used , $1,439.99 - Add to Cart Skip to Product Information

Dynaudio 18S Dual 9.5 inch Powered Studio Subwoofer Used

500W Powered Subwoofer with Dual 9.5" Long-throw MSP+ Hybrid Drive Woofers, Monitor-system-integration DSP, and Built-in 3-band EQ
Item ID: TrueBass18SU1
Dynaudio 18S Dual 9.5 inch Powered Studio Subwoofer

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Dynaudio 18S Dual 9.5 inch Powered Studio Subwoofer Used

Used Savings!

Save $359.01 when you buy used! What is used gear?

The price below reflects your savings.

Used Savings: $359.01 New for $1,799.00

A Smart Sub for Your Dynaudio Monitor System

This article was Written By

Our Product Research Team

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Are you tired of trying to gauge the bottom end of your recordings? Dynaudio's 18S is a serious, pro-grade subwoofer that gets you tightly down to 16Hz. You'll feel the crush of a well-recorded kick drum. The full weight of a 5-string bass. You'll also be able to identify any low-frequency mud that needs to be cleaned up. To properly record frequencies this low, you've got to be able to hear them. Adding the 18S to your monitoring setup opens up a new world of performance that lets you record, mix, and master with meticulous accuracy — and deliver tracks that translate perfectly to the world beyond your studio. Employing dual-opposing 9.5" long-throw MSP+ Hybrid Drive units and 500 watts of Class D amplification, the 18S features intelligent DSP that seamlessly tailors its performance to popular Dynaudio high-end monitors, for true full-range monitoring that will help you make better recordings.

Advanced DSP automatically mates with popular Dynaudio monitors

The 18S is engineered with Dynaudio's advanced DSP modeling technology that acoustically mates the 18S to any of the company's pro studio monitors from the BM and LYD series and above, essentially turning a two-way speaker into a three-way system. And if you combine the 18S with an LYD 48 stereo or surround setup, you’ll have a four-way monitoring system. Tight integration of your full-range speakers with your sub is key for critical accuracy during the recording, mixing, and mastering process. For Dynaudio, this involved assessing the acoustical characteristics of each of their popular high-end studio monitors and creating customized performance maps for each one. You select the specific Dynaudio speakers you are using from the 18S display's menu, and the appropriate roll off will be applied automatically. The process is also future-proof: when Dynaudio adds new monitors to their range, 18S firmware updates that include the new speakers' performance maps will be made available — so your monitoring system can grow according to your needs.

Flexible time- and phase-aligned integration into any studio setup

The 18S is fitted with a selection of RCA and XLR connections for flexible integration into your studio setup and includes a number of handy features to assist with integration into more advanced systems. This includes your ability to set a time delay to ensure the subwoofer and main speakers are working in perfect synchronicity. Simply enter the distance from the sub to the speakers, and the 18S automatically adjusts itself using time and phase delays. Also onboard is a three-way parametric equalizer to defeat room modes that could adversely affect the accuracy of your recordings.

Dual-opposing driver design for power and punch

In the 18S, two new drivers reside at either end of the cabinet, which is wider than it is deep for placement convenience. Delivering a powerful one-two punch is a pair of Dynaudio's cutting-edge MSP+ Hybrid Drive units in a dual-opposing configuration, powered by a 500-watt Class D amplifier.

Hear every nuance and produce mixes that translate

For for the 18S, Dynaudio designed a brand-new driver they call the MSP+ Hybrid Drive. It's made from aluminum rather than the company's usual magnesium silicate polymer. It's effectively a sandwich, with paper backing and an MSP dust-cap on the front. In recent years, the efficacy of sandwich construction has proven its worth for subwoofers, which typically require a more critical balance between stiffness, lightness, and damping than standard speaker drivers. Aside from the technology under the hood, Sweetwater can confirm that the 18S's performance is exemplary. It's a sub that integrates seamlessly with your Dynaudio monitors and lets you work with unfettered creative freedom, confident that you're hearing every nuance — and that your mixes will translate to any playback system.

Dynaudio 18S Powered Subwoofer Features:

  • Onboard 500-watt Class D amplifier
  • Preset speaker crossover filters
  • Dual-opposing driver design principle
  • Two 9.5" MSP+ Hybrid Drive long-throw woofers for accurate low-frequency reproduction
  • Flexible time- and phase-aligned integration into any studio setup
  • Frequency response: 16Hz—230Hz ±3dB
  • Advanced DSP with updatable presets for a range of Dynaudio pro studio monitors
  • Built-in 3-band parametric EQ
  • Master/Slave feature for daisy-chaining multiple subs
  • I/O connectors: balanced XLR, unbalanced RCA
  • Auto On/Off for energy conservation
What Is Used Gear?

Nearly all the used gear at Sweetwater has been previously purchased as new from Sweetwater. You can count on the fact that we only offer used items that are determined to be fully operational. Our award-winning, factory-authorized service department meticulously inspects all used gear before releasing it for sale. Of course, we stand behind every used item we sell with our exclusive 90-day Used Gear Guarantee. If any used item malfunctions or doesn't perform as expected, simply call your Sweetwater Sales Engineer, and we'll do what we can to make it right.

When you buy a used item at Sweetwater, you get:

  • Used items that have been inspected and tested for full functionality by our factory-authorized techs
  • Quality used equipment that is built to last
  • FREE shipping on most items
  • The gear you want, worry-free with our exclusive 90-day Used Gear Guarantee

Please note that this product is available in limited or single quantities. While we do our best to keep our online product information up to date, we cannot guarantee that this product will be in stock at the time your order is placed (for instance, another customer could be purchasing this product as you read this text). If you would like to verify that this product is in stock prior to making your purchase, please contact us or call toll-free at (800) 222-4700.

Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

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