SPL Transient Designer 4 Mk2 – Next-Level Dynamics Processing

The SPL Transient Designer 4 Mk2 is the latest generation of the iconic transient processor that revolutionized dynamic shaping in 1998. With four independent channels, this cutting-edge device allows you to manipulate the attack and sustain of audio signals in a level-independent way—without the need for threshold adjustments. Whether enhancing transients for more punch or softening sustain for tighter mixes, the Transient Designer 4 Mk2 offers unparalleled control with just two intuitive parameters.

Key Features

• Level-Independent Processing: No need to set a threshold—manipulate attack and sustain dynamically.
• Attack Control: Increase or decrease transients by up to ±15 dB.
• Sustain Control: Extend or shorten sustain by up to ±24 dB.
• Four Independent Channels: Each channel has its own processing for ultimate flexibility.
• Stereo Linking: Link channels 1 & 2 or 3 & 4 for accurate stereo transient shaping.
• Relay Hard Bypass: Ensures silent switching and immediate signal pass-through in case of power failure.
• Signal LED Monitoring: LED indicators show when an input signal exceeds -20 dB.
• Premium Build Quality: Black anodized aluminum front panel, solid aluminum knobs, and high-grade steel housing.

Differential Envelope Technology (DET)

The SPL Transient Designer 4 Mk2 utilizes Differential Envelope Technology (DET), which enables level-independent control of dynamic signal characteristics. By tracking the natural signal envelopes, the processor adapts seamlessly to the input, ensuring optimal results without the need for constant adjustments. This allows for precision transient control while maintaining musicality.

Inputs & Outputs

The Transient Designer 4 Mk2 is equipped with premium Neutrik XLR connectors with gold-plated contacts for pristine signal transmission. The nominal level is set at +6 dB for optimal headroom.

Specifications

Analog Inputs & Outputs:

• Balanced XLR
• Maximum Input Gain: 21 dBu
• Input Impedance: 22 kΩ
• Maximum Output Gain: 21 dBu
• Output Impedance: 100 Ω

Performance & Frequency Response:

• Common Mode Rejection (1 kHz): 80 dB
• Frequency Range (-3 dB): 10 Hz – 100 kHz
• THD + N (0 dBu, 10 Hz – 22 kHz): -90 dB
• Noise (A-weighted): -97 dBu
• Dynamic Range: 118 dB

Power Supply:

• Internal Linear Power Supply with Toroidal Transformer
• Operating Voltage for Analog Audio: +/- 15 V
• Operating Voltage for Relays and LEDs: +12 V
• Mains Voltage (Selectable): 230 V AC / 50 Hz; 115 V AC / 60 Hz
• Power Consumption: max. 15 W

Dimensions & Weight:

• W x H x D: 482 x 44 x 237 mm (19 x 1.73 x 9.33 inches)
• Weight: 3.2 kg (7.27 lbs)
• Shipping Weight: 4.45 kg (9.81 lbs)

The SPL Transient Designer 4 Mk2 redefines dynamic processing by allowing unparalleled envelope shaping without traditional threshold-based limitations. Whether used on drums, vocals, or entire mixes, this device remains a staple for engineers looking to achieve professional-grade transient control.