SPL IRON black

The IRON Mastering compressor combines the sonic virtues of legendary vintage tube compressors with the advantages of the High Dynamic 120V operating voltage in a single unit.

Thanks to the especially conceived Mu-Metal iron transformers, the signal of each channel is split across two different twin-triode tubes. The combination of the different response curves of both tubes results in a transparent and musically pleasant compression. Additionally, peak signals of the control voltage are limited by a feed-forward resistive vactrol-opto-isolator. Thus, the output signal remains lively even with a high gain reduction. The compression is only noticeable with extreme settings. The Attack and Release parameters have six different settings ranging from Slow to Fast. The times are not constant, they vary according to the Rectifier circuit selected: There are six different Rectifier settings available with different diodes (germanium, silicon, LED, mixed). The Sidechain EQ is yet another option to adjust the Iron to the signal being processed in an optimal way. It allows you to choose between an external EQ or one of the four internal EQ presets. The EQ presets have a complex frequency response and have been conceived with different program material in mind. Only the control signal is affected, not the actual audio signal. In the Off position, the Sidechain EQ is inactive. After the compression stage, the signal can be boosted or attenuated up to +/- 12dB with the Output Gain, which makes the Iron easy to integrate into any signal chain. All functions can be adjusted via switches or, in the case of the Threshold, with a detented potentiometer, making it easy to replicate exact settings

120V Rail Technology:

120V Rail Technology is developed and manufactured to run on an operating voltage of 120 volts, which corresponds to twice that of discrete operational amplifiers and four-times that of semiconductor operational amplifiers. Technically especially in terms of dynamic range and headroom and sonically especially in reproducing the finest details and delivering a totally relaxed sounding audio experience. Music sounds absolutely natural and hearing fatigue is drastically reduced.

Features:

• Variable bias tube compressor
• Parallel dual tube circuit
• Tube selection and pairing with Weigl Roe Test
• Specially conceived Mu-Metal iron transformers
• Feed-forward resistive vactrol-opto-isolator
• Six different Rectifier settings available
• Sidechain that allows you to choose between Off, four sidechain-filter presets or an external sidechain signal.
• All functions can be adjusted via switches or, in the case of the Threshold, with a detented potentiometer
• In Link mode, the Threshold, Tube Bias, Attack, Release, and Rectifier parameters, as well as the Sidechain EQs, are controlled with the right side (channel 2) of the unit.
• Additional passive 120V equalizer with two presets
• High Dynamic 120V operating voltage
• Auto Bypass mode
• Made in Germany

The Iron is available in different colours: Red