TUBECORE 500
Pure Tube Vari-Mu
Tubecore 500 is a true vari-mu tube compressor designed for the 500-series format, delivering weight, density, and unmistakable harmonic character. Built as a fully symmetrical, transformer-balanced mono unit, it achieves compression through remote cut-off tube biasing for smooth, musical gain control. Operating at a true 250 V DC internally, Tubecore 500 preserves authentic tube dynamics rarely found in modular systems. Equally suited for tracking or mastering when used as a matched stereo pair, it excels on vocals, drums, guitars, and bass with authority, depth, and unmistakable analog presence.
True Vari-Mu Compression in a 500-Series Format
Tubecore 500 is a genuine vari-mu compressor, using remote cut-off tube biasing to control dynamics in a smooth, inherently musical way. This topology delivers natural compression curves and rich harmonic movement that respond beautifully to program material.
High-Voltage Tube Operation Without Compromise
Unlike typical 500-series designs, Tubecore 500 powers all tubes at a true 250 V DC via an internal converter. This ensures proper tube behavior, headroom, and depth, preserving the character of classic vari-mu compressors.
Hand-Built Precision and Premium Components
Each unit is hand-assembled using carefully matched 1% metal-film resistors, Wima capacitors, and JJ tubes. Every Tubecore 500 is individually calibrated to deliver consistent performance and authentic analog tone.
Transformer-Balanced, Studio-Ready Design
IGS Custom audio transformers on input and output provide excellent isolation, stability, and sonic weight. Used as a mono tracking compressor or as a matched stereo pair, Tubecore 500 becomes a powerful mastering-grade tool.
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Specifications
| Device Type | Vari-Mu Compressor |
| Hard Wire Bypass | Yes |
| Stereo Link | Yes |
| Audio Transformers | Yes, IGS Custom |
| Input Impedance Balanced |
600 Ω |
| Output Impedance Balanced |
600 Ω |
| Operating Level | +4 dBu |
| Maximum Input Level | +22 dBu |
| Maximum Output Level | +22 dBu |
| Maximum Gain Reduction | 30 dB |
| Maximum Gain | 40 dB |
| Noise Level | −99 dBA |
| Attack Time | 0.1 – 30 ms |
| Release Time | 0.1 – 4 s |
| Frequency Response | 8 Hz – 20 kHz ±1 dB |
| THD+N | 0.002% @ 0 dBu |
| Power Supply | API standard with internal DC–DC conversion (250 V DC tube supply) |
| Power Consumption | 12 W |
| Shipping Weight | 3 kg |
| VU Meter | Yes, backlit GR meter |
| Tube Complement | ECC82, 2 × 6AK5 |
