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SPL TDx Transient Designer 500 Series Module , $439.00 - Add to Cart Skip to Product Information

SPL TDx Transient Designer 500 Series Module

500 Series Dynamics Processor Module with Attack, Sustain, Mix, and Output Controls
SPL TDx Transient Designer 500 Series Module
SPL TDx Transient Designer 500 Series Module

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SPL TDx Transient Designer 500 Series Module
In Stock!

Only 1 left in stock! More on the way.

Transient Control, the Easy Way

This article was Written By

Our Product Research Team

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Do you ever wish you could re-shape transients? Sweetwater has a 500 Series module you should know about. Leveraging SPL's Differential Envelope Technology, TDx Transient Designer gives you level-independent control over the attack and sustain characteristics of any sound for increased power and presence in your recordings. With TDx, attacks can easily be emphasized or de-emphasized; sustain can be shortened or lengthened. If you've ever tried to achieve this with a compressor/limiter, you already know you've been using the wrong tool for the job.

The right tool for the job

With just two knobs, TDx gives you explicit control over the attack and sustain of your signals: invaluable for creating huge, punchy drums and in-your-face guitars — and having everything sit perfectly in your mix. TDx includes a mix control for easy parallel processing of wet and dry signals, as well as an output level knob. Add serious dynamics processing to your arsenal with SPL's TDx Transient Designer.

Precise transient control: a new way to approach your mix

Besides basic EQ and panning, you'd be surprised how close to perfect you can get your mix using only the SPL TDx Transient Designer. It's simple to use — adjust the attack knob to either sharpen or soften transients, and use the sustain control to fine-tune how quickly sounds decay. Use sharper attacks with shorter sustain to place elements up front in the mix, and soften transients while enhancing sustain to place elements further back. Using the Mix knob, dial in a bit of unprocessed signal to taste.

Manage dynamics without affecting loudness

The reason we like the TDx Transient Designer is that it gives us control over dynamics without resorting to compression. You may find you can use milder compression ratios and settings on tracks that have been treated with TDx, resulting in more dynamic and natural-sounding mixes.

SPL TDx Transient Designer 500 Series Module Features:

  • Level-independent control over attack and sustain characteristics of any sound
  • Leverages SPL's powerful Differential Envelope Technology
  • Attack control boosts or attenuates attacks
  • Sustain control shortens or lengthens sustain
  • Mix control for easy parallel processing of wet and dry signals
  • Output level control
  • On/Bypass switch; Signal-present LED
  • Single-slot module; requires compatible 500 Series chassis
  • Crafted in Sound Performance Lab's Niederkrüchten, Germany facility

Warranty Info

Sweetwater's FREE 2-Year Total Confidence Coverage Warranty

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  • Save money with FREE parts and labor
  • Get back to making music with the industry's fastest turnaround time
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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.

Applies only to select items from this manufacturer. Ask your Sweetwater Sales Engineer for more details.