The IGS ONE LA is an optical compressor, inspired by the legendary solution well known from the '60s. This is a very easy to use and great sounding tool.
The IGS ONE LA is an input and output transformer balanced, full tube device. The input of the system includes an IGS Audio 2510 transformer, the output an IGS 15k/600. Two 6N1P-EW dual-triodes are installed on the audio circuit, while the compression circuit is equipped with the 6N2P-EW triode and the 6AQ5 pentode, which control the work of the T4Bx photocell.
Simply adjust the input Gain and Peak Reduction.
The One LA 19" has simple controls: a Peak-Reduction knob controls the gain of the side-chain circuit, and therefore, the gain reduction threshold; Gain Control for the make-up gain; and a Limit/Compress switch to alter the compression ratio. The VU meter may also be switched to show gain reduction or output level.
It is known that in the case of ONE LA the nature of the device depends on the T4B photo-cell.
The original solution used the TELETRONIX electroluminescent panel, that was illuminating the photo resistor. The idea of opto-compression originated in the past is still being cultivated today. IGS Audio has developed its own photocell equivalent to T4B called T4BX. The use of carefully selected components in the production of the T4BX photocell, and their individual measurement and matching, result in completely repetitive sound qualities of each device.
Matched pairs are also available. The link socket is located on the rear panel. The RCA-RCA cable is all you need to link two units. Perfect stereo matching is achieved by hand selected tubes and Elma switches.
The One La 19" has a sonic character that makes it sought after by many recording engineers.
| Device type | |
|---|---|
| Optical Compressor | Yes, T4Bx or T4B photocell |
| Basic features | |
|---|---|
| Stereo Link | Yes, RCA-RCA cable |
| All stepped manipulators | 24 step Elma switches |
| Input & Output | |
|---|---|
| Input Impedance (balanced) | 600 Ohm, IGS Audio custom transformer |
| Output Impedance (balanced) | 600 Ohm, IGS Audio custom transformer |
| Audio transformers | IGS Audio custom transformer |
| Levels | |
|---|---|
| Operating Level | +4dBu |
| Max input level | +16dBu |
| Max output level | +18dBu |
| Dynamic Range | >110 dBA (@ 1kHz, +24 dBu) |
| Max. gain | 30dB |
| Max Gain Reduction | 36 dB |
| Time constants | |
|---|---|
| Attack: | 1ms |
| Release: | 0.5 – 5s (50% @ 60ms) |
| Distortion (@ 20 Hz - 20 kHz) | |
|---|---|
| THD+N | 85 dB (A) |
| Power | |
|---|---|
| Voltage | 115/230V AC, 50 - 60Hz |
| Power consumption | 40W |
| Power supply | Internal |
| Packing box | |
|---|---|
| Dimensions | 70 x 50 x 30cm |
| Shipping weight | 7kg |
| Others | |
|---|---|
| Tube set | 2x6N1P-EW, 6N2P-EW, 6AQ5 |
| Files |
|---|
| ONELA manual v1 pdf.pdf |
| t4bx.pdf |
Analog Cure
IGS Audio is now one the most desired studio equipment brands in Poland and it is continuously expanding internationally. The original IGS Audio products qualify as pretenders to no.1. All stuff manufactured by IGS Audio is accurate and excellent.
IGS Audio is all about happiness in success. IGS Audio offers 3 years warranty for all products (warranty does not cover tubes).
IGS Studio has been operational since 1997. The IGS Audio brand was created in 2003.
© 2015 IGS Audio
