More punch or less ring on drums, guitars and more – with just two knobs and no threshold to set. The SPL Audio TDx is the SPL Transient Designer as a single-slot 500 Series module. It shapes the attack and decay of a sound regardless of its level.
Why customers choose it
Who it is for
Drummers, producers, mix engineers and home studios with a 500 Series rack who want punchier or tighter drums, guitars, bass and percussion.
What’s in the box
- 1 x SPL TDx module, 500 Series
- 1 x Manual
Specifications
| Type | 500 Series transient designer |
|---|---|
| Format | Single-slot 500 Series module |
| Attack range | +/-15 dB |
| Sustain range | +/-24 dB |
| Controls | Attack, Sustain, Mix, Output, On/Bypass |
| Inputs / outputs | Balanced |
| Max input / output level | 21 dBu |
| Input / output impedance | 20 kOhm / 150 Ohm |
| Frequency range (-3 dB) | 10 Hz – 100 kHz |
| THD+N (0 dBu) | 0.03 % |
| Noise (A-weighted) | -92.3 dBu |
| Dynamic range | 113 dB |
| Weight | 0.65 kg |
Good to know
- Needs a 500 Series rack (lunchbox) with one free slot; power comes from the rack.
- Positive Attack adds punch; negative Attack softens it. Positive Sustain lengthens the decay; negative Sustain shortens it, for example to reduce room sound.
- For more channels in a 19-inch rack, SPL makes the Transient Designer 4 Mk2.
FAQ
Do I need to set a threshold?
No. The Transient Designer works level-independently, so only Attack and Sustain are needed.
Can I use it for parallel processing?
Yes. The Mix control blends the processed and the dry signal.
































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