IGS Audio One LA 500 tube opto-compressor

The IGS ONE LA 500 is an opto-compressor built for the 500 series format. This is the first high voltage vacuum tube 500 series module that is offered by IGS. It is powered with 250V DC from an on-board voltage converter, so it can be plugged into any 500 series rack equipped with a standard power supply.

Every single ONE LA is hand made with high quality, matched components (1% metal film resistors, Wima caps). It is equipped with JJ tubes and individually calibrated to give you the unique and unspoiled experience of one of the best opto-compressors in the history - the Teletronix '68 LA-2A. We have spent hundreds of hours designing the ONE LA, to make sure that it is as simple to use as it is versatile. Not only for harmonically rich vocals and strings, but also for huge and beefy drums and bass instruments.

Three audio transformers (Sowter and Edcor in audio path and OEP in sidechain) have been used to provide excellent performance and with only two knobs and a single compressor/limiter switch, there is nothing that could go wrong. Additionally, you can replace the photocell easily (special version available)

DEVICE TYPE
Optical Compressor: Yes
BASIC FEATURES
Stereo Link: Yes, for a custom order
Hard wire bypass: Yes
INPUT & OUTPUT
Input Impedance (balanced): 600 ohm, Sowter transformer
Output Impedance (balanced): 600 ohm, Edcor (USA) transformer
Audio transformers: Yes, Sowter, Edcor, Carnhill (sidechain)
LEVELS
Operating Level: +4 dBu
Max input level: +20 dBu
Max output level: +21 dBu
Dynamic Range: 100 dB
Noise Level: -99 dBA
Max. gain: 32 dB
Max Gain Reduction: 32dB
TIME CONSTANTS
Ratio: 4:1 in COMP mode, 100:1 in LIM mode
Attack: 10ms
Release: 0.5 – 5s (50% @ 60ms)
BANDWIDTH
Frequency response: 8 Hz - 20k Hz, +/- 1 dB
DISTORTION (@ 20 HZ - 20 KHZ)
THD+N: 0.002% @ 0dBu
FRONT PANEL
VU Meters: Yes, GR (backlit)
POWER
Voltage: API Standard, internal DC-DC conversion for powering tubes (250V DC)
Power consumption: 8W
PACKING BOX
Shipping weight: 3 kg
OTHERS
Tube set: ECC802, ECC803

US and EU parcels ship via UPS, ETA 1-7 working days from pickup day zero. That also applies to most locations worldwide.

All shipments are fully insured.

Bigger shipments requiring pallets or custom made crates ship to US, CA, JP, CN, AU and other outside of EU locations via DHL Air Freight, ETA is normally approx. 7-14 working days from pickup day zero.

Big shipments inside EU ship via different freight companies, recently mostly via ACE Logistics. Freight forwarders can use different courier companies for deliveries to final destinations.

Palletising and crating time can vary depending on the size of the shipment and packaging queue. We pack all our shipments with great care.

You are most welcome to pick your order up yourself from our Retrosonic Pro Audio showroom, studio and warehouse in Tallinn, Estonia.

We ship worldwide – contact us for a personal shipping quote or any other questions.

VAT (Value Added Tax) can be deducted if you have a company with a valid EU VAT number or if you're based outside of the EU. Non-EU buyers pay all and any import tax and duty as regulated by their local customs.