IGS TUBECORE 3U Stereo Mastering Compressor
Estimated delivery in Italy between 7 and 9 July
Stereo Mastering Compressor
The IGS TUBECORE 3U is a fully balanced stereo mastering compressor with a symmetrical transformer. The design is based on the typical vari-mu solution. In addition to the classic INPUT, THRESHOLD, and OUTPUT controls, it introduces a switchable high-pass filter in the sidechain, parallel compression (MIX knob), independent ATTACK and RELEASE switches, and user-replaceable tubes accessible from the rear of the unit.
The IGS TUBECORE 3U was designed as a studio mastering compressor. It is built using a 3U design, which improves front panel clarity and simplifies the replacement of the tubes located at the rear. The compressor allows working in both dual mono and mid/side (M/S) modes. The Mode switch has two bypass positions: both do the same thing, but the second was added for comfort and quick A/B comparison.
The design of the IGS TUBECORE 3U is based on the possibility of replacing the tubes. As a user, you can choose from a few types:
- 6N1P-EW (6N3P-EW): Standard tube set; "standard" IGS compression
- 6BC8/6BZ8: Tight, transparent, punchy compression
- 6386: Legendary compression, from the famous dual triode
- 5670: Deep, dark tube compression.
The User Manual describes in detail how to replace the tubes, so it is quick and simple.
Every single IGS TUBECORE 3U is handcrafted with high-quality matched components (1% metal film resistors, Wima caps). It features NOS 6N1P-EW (6N3P-EW) tubes and is individually calibrated to guarantee the unique and pristine experience of one of the best vari-mu compressors in history. It features Carnhill and Sowter audio transformers.
The IGS TUBECORE 3U uses Elma 24-step switches.
Specifications
- Vari Mu Compressor
- All stepped knobs: Elma 24-pole switches
- Sidechain HPF: 120Hz, 60Hz, off
- WET/DRY Mixer: 0 - 100%, 4 dB steps
- MID/SIDE Processing: OpAmp M-S encoding/decoding
- Input Impedance (balanced): XLR, 10k Ohm, IGS custom transformers
- Output Impedance (balanced): XLR, 600 Ohm, IGS custom transformers
- Operating Level: +4dBu
- Maximum Input Level: +22 dBu
- Maximum Output Level: +22 dBu
- Dynamic Range: >107 dBA (@ 1kHz, +24 dBu)
- Maximum Gain: +35dB
- Maximum Gain Reduction: 20 dB
- Attack: 0.1 - 30 ms
- Release: 0.1 - 4s
- Frequency Response: 20Hz to 20kHz; +/- 0.2dB
- Signal-to-Noise Ratio: 87 dBA
- THD: 0.12 %
- THD+N: 0.15 %
- IMD (SMPTE): 0.32%
- Crosstalk: 82 dB
- Voltage: 115/230 VAC, 50-60 Hz
- Power Consumption: 44 Watts
- Power Supply: External
- Tube Set: Standard: 6N1P-EW or 6N3P-EW; Optional: 6BC8, 5670, 6386
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About Igs
IGS Audio is a Polish manufacturer specializing in high-quality analog outboard gear for professional recording studios. The brand is recognized in the pro audio industry for its compressors, equalizers, preamplifiers, and summing mixers that combine classic analog circuits with modern design and handcrafted construction. IGS Audio products are valued by sound engineers and producers for their warm and musical sonic character, inspired by vintage equipment but with contemporary performance and reliability. The meticulous attention to detail and the use of selected components make each unit a lasting investment for any studio. On musicdelivery.net, you can discover the range of IGS Audio analog processors, perfect for professional recording, mixing, and mastering of the highest standard.
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Shipments
Shipments
We ship throughout Italy and the European Union via selected express courier partners. All orders travel in special reinforced packaging and are covered by 100% included insurance to fully protect the value and integrity of professional equipment during transport.
Returns and refunds
Returns and refunds
You can request a return within 14 days of receiving the order. As these are professional hardware and devices, items must be returned completely intact, unused, unactivated, and sealed in their original packaging, complete with all accessories and manuals.
Frequently Asked Questions
Can't find the answer you're looking for? Our team of specialists is at your disposal for configurations or technical questions.
What are your shipping and delivery times?
What are your shipping and delivery times?
Orders are processed within 24/48 business hours. Delivery is made by insured express courier to guarantee maximum protection and safety even for the most delicate and expensive equipment.
Are the products covered by an official warranty?
Are the products covered by an official warranty?
Yes, all products are 100% original and covered by the official 24-month manufacturer's warranty. In addition, our technical department offers free after-sales support to assist you with the initial setup of your system.
How does the right of withdrawal work?
How does the right of withdrawal work?
If the hardware does not meet your expectations, you can return it within 14 days of receipt. The product must be returned intact, unused, and sealed in its original packaging, complete with all accessories and manuals.
What does it mean if a product is "Available on order"?
What does it mean if a product is "Available on order"?
Some complex professional audio systems or lighting equipment are ordered directly from official distributors based on customer requests. You can proceed with the purchase as normal and our team will immediately inform you of the exact arrival times at our warehouses.

