One LA
One Leveling Amplifier
The IGS ONE LA is a modern optical tube compressor inspired by the most iconic designs of the 1960s, delivering the smooth, natural behaviour that made vintage opto units indispensable in top studios. Its program-dependent gain control gently evens out dynamics while preserving musicality, warmth and tone. With only two controls — Gain and Peak Reduction — the ONE LA offers an intuitive workflow that makes it easy to achieve polished, mix-ready results on vocals, bass, guitars, and buses. Rich harmonic character, effortless operation, and unmistakable analogue warmth make it a reliable go-to for engineers seeking classic compression with modern consistency.
Timeless Optical Compression
Inspired by the legendary tube opto compressors of the 1960s, the IGS ONE LA delivers the same smooth, musical behaviour that made those units beloved across generations. Its optical gain-reduction circuit responds naturally to the programme material, shaping dynamics with grace and cohesion.
Effortless, Intuitive Control
Designed around simplicity, the ONE LA uses just two controls — Gain and Peak Reduction — allowing engineers to focus on tone rather than tweaking. Its elegant, minimal workflow makes it easy to achieve warm, controlled, and consistent compression in seconds.
Warm, Musical Harmonics
Beyond its dynamic behaviour, the ONE LA imparts a subtle tube-driven richness that enhances vocals, bass, guitars, strings, and mix buses. The harmonic warmth adds depth and body without colouring the signal excessively.
Vintage Soul, Modern Reliability
Hand-built with high-quality components, the ONE LA delivers the reliability today’s production environments demand while preserving the unmistakable analogue feel of a genuine optical tube compressor.
Specifications
| Device Type | FET Compressor — Yes, T4Bx or T4B photocell |
| All Stepped Manipulators | Yes |
| 24 Step Elma Switches | Yes |
| Stereo Link | Yes, RCA–RCA cable |
| Audio Transformers | IGS Audio custom transformer |
| Input Impedance (Balanced) | 600 Ohm, IGS Audio custom transformer |
| Output Impedance (Balanced) | 600 Ohm, IGS Audio custom transformer |
| Operating Level | +4 dBu |
| Max Input Level | +16 dBu |
| Max Output Level | +18 dBu |
| Dynamic Range @ 1kHz, +24 dBu |
>110 dBA |
| Max Gain Reduction | 36 dB |
| Max Gain | 30 dB |
| Attack | 10 ms |
| Release | 0.5 – 5 s (50% @ 60 ms) |
| THD+N 20 Hz – 20 kHz |
85 dB (A) |
| Voltage | 115/230V AC, 50–60 Hz |
| Power Consumption | 40 W |
| Power Supply | Internal |
| Dimensions | 70 × 50 × 30 cm |
| Shipping Weight | 7 kg |
| Tube Set | 2× 6N1P-EW, 6N2P-EW, 6AQ5 |