The IGS Audio 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 a Sowter 4383 transformer, the output an Edcor 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.
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.
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.
- Optical Compressor T4B photocell
- All stepped manipulators: 24 step Elma switches
- Stereo Link: RCA-RCA cable
- Input Impedance (balanced): 600 ohm
- Output Impedance (balanced): 600 ohm
- Audio transformers: input - Sowter, output - Edcor
- Operating level: +4 dBu
- Max input level: +16dBu
- Max output level: +18 dBu
- Max gain: 30 dB
- Max gain reduction: 36 dB
- Attack: 1ms
- Release: 0.5 – 5s (50% @ 60ms)
- Frequency response: 20Hz - 20kHz; +/- 0.3dB
- THD+N: 85 dB (A)
- Voltage: 115/230V AC, 50 - 60Hz
- Tube set: 2x6N1P-EW, 6N2P-EW, 6AQ5
Receive FREE Shipping to ANYWHERE in the Continental United States on almost every item or order!
- Most items qualify for orders over $99.99
- FREE Economy shipping to the lower 48 states
- In order to protect your shipment from theft, we require a direct signature when delivered on most orders over $99
- International shipping is extra, contact us for an international shipping quote
- Free Shipping does not apply to special orders and oversized/overweight products
- Any expedited deliveries are available at an extra cost
Digital products are delivered via email, and nothing is physically shipped to you. Most products are delivered instantly, and will be marked as "eDelivery or Download" in these cases. Due to the irrevocable nature of digital goods, we are unable to offer returns or refunds for any order.
PLEASE NOTE: This product is delivered via secure, electronic delivery. You will receive the full product license and instructions direct to your email. Enjoy a safe and fast way to get the latest version and full support direct from the manufacturer.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.