Aug
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Three IGS Audio Masterpieces for High-End Recording, Mixing & Listening
Three IGS Audio Masterpieces for High-End Recording, Mixing & Listening
IGS Audio: Where Polish Engineering Meets Exceptional Sound
From high-end tube amplification to precision mastering EQ and characterful vari-mu compression, IGS Audio continues to build equipment for engineers, producers and audiophiles who value exceptional sound, meticulous construction and genuine analogue character. The Thermidt Code 3530 High-End Tube Amplifier, 825EQ Mastering Equalizer and Tubecore 3U Stereo Mastering Compressor each approach audio from a different angle, yet share the same commitment to premium components, thoughtful engineering and uncompromising performance.
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Equalizers
Thermidt Code 3530: Pure Polish Engineering
The IGS Audio Thermidt Code 3530 brings IGS Audio’s extensive professional audio engineering experience into the world of high-end tube amplification. Its push-pull Class AB design delivers 2 x 32W through four 5881 power tubes, while the unique Negative Cathode Feedback topology provides exceptional detail, firm bass control and stability. Custom UTM Industry transformers, Mundorf Silver Oil capacitors, Vishay Dale resistors and a Swiss-made 24-step ELMA attenuator reinforce its reference-grade approach.
A Reference-Grade Hi-Fi Experience
Designed to drive both 4Ω and 8Ω loudspeakers, the Thermidt Code 3530 combines dynamic tube power with an exceptionally wide 10 Hz–50 kHz frequency response. Its adjustable bass contour provides additional control over low-frequency character, while the ultra-rigid duralumin chassis and carefully engineered thermal ventilation demonstrate the same attention to longevity as its circuitry. It is an amplifier designed not simply to reproduce music, but to reveal its character with clarity, openness and emotional depth.
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IGS Audio 825EQ: Precision for the Final Mix
The IGS Audio 825EQ Mastering Equalizer is designed specifically for those critical final-stage decisions where even the smallest tonal adjustment can make a significant difference. Its mastering-grade stepped controls allow precise, repeatable sound shaping, while the all-ELMA switching architecture delivers the consistency and reliability expected from professional mastering equipment.
Transformer-Balanced Analogue Character
At the heart of the 825EQ are UTM transformer-balanced inputs and outputs, with three audio transformers per channel helping preserve signal integrity throughout the processing path. A linear power supply provides clean and stable operation, while three ECC88 tubes per channel introduce the distinctive warmth and character of tube circuitry. The ability to substitute 6N23P or 6N1P tubes also provides scope for tailoring the unit’s sonic personality to different applications.
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Equalizers
Tubecore 3U: The Character of Vari-Mu Compression
The IGS Audio Tubecore 3U Stereo Mastering Compressor is a fully symmetrical, transformer-balanced stereo compressor based on the classic vari-mu topology. Designed for mastering applications, it combines traditional INPUT, THRESHOLD and OUTPUT controls with a switchable sidechain high-pass filter, MIX control for parallel compression, and independent ATTACK and RELEASE settings.
Flexible Stereo, Dual Mono & Mid/Side Operation
The Tubecore 3U offers dual-mono and mid/side operation, making it equally useful for stereo mastering and more specialised processing applications. Its user-replaceable tube architecture allows different tube types to influence the compressor’s response, from the standard character of 6N1P-EW tubes through to the tighter response of 6BC8/6BZ8, the legendary character of 6386 and the deeper, darker compression associated with 5670 tubes.
Hand-Built with Premium Components
Every Tubecore 3U is handmade using carefully matched components, including 1% metal film resistors, WIMA capacitors and Carnhill and Sowter audio transformers. Each unit is supplied with NOS 6N1P-EW tubes and individually calibrated, delivering the consistency and musicality expected from a serious mastering compressor while retaining the flexibility to explore different tube characteristics.
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Three Different Tools, One Engineering Philosophy
Together, the Thermidt Code 3530, 825EQ, and Tubecore 3U demonstrate the breadth of IGS Audio’s approach to analogue sound. The Thermidt Code 3530 focuses on transparent yet emotionally engaging tube amplification, the 825EQ provides precise mastering-grade tonal shaping, and the Tubecore 3U adds sophisticated dynamic control with the unmistakable character of vari-mu tube compression.
Bring High-End Analogue Craftsmanship Into Your Setup
Whether you’re building a high-end listening system, refining a professional mastering chain or searching for analogue hardware capable of adding genuine depth, warmth and character to your recordings, these three IGS Audio designs offer compelling solutions. ⤵️
Equalizers
👉 Explore the entire IGS Audio range today and discover how carefully engineered analogue hardware can become an integral part of your creative and listening experience. 👇
500 Series
Equalizers
500 Series
Equalizers
Effects Processing
IGS Audio PHOM – Tube Phono Stage with the Passive RIAA Filter
Mic Preamps
Effects Processing
INSTRUMENTS
