Tube-Tech CL 1B Opto Compressor

The TUBE-TECH CL 1B is an exceptional all-tube optical mono compressor, renowned for its musical and smooth compression, even at extreme settings, retaining the source's clarity—a standout feature compared to other compressors. Its user-friendly design allows for intuitive operation, ensuring you achieve your desired results quickly and effortlessly.

This compressor employs a gain-reduction element placed right after the input transformer, controlled by the sidechain amplifier, housing two time control circuits—one for fixed and the other for variable Attack/Release. These time-controllers can be used independently or together, and the entire control circuit utilizes semiconductor OP-amps.

PSU works on 115-230V, EU power cord included.

Unique, low-distortion optical gain reduction element
All-tube based push-pull amplifier
Frequency response @ -3 dB: 5 Hz to 25 kHz
Low noise: < -75 dBU @ 30 dB gain
CMRR: > 60 dB @ 10 kHz
Variable ratio from 2:1 to 10:1
Continuously variable attack and release times
Output gain: Off to +30 dBU
Variable threshold: Off to -40 dBU
Input impedance: 600Ω
Interconnection of several compressors via two busses
VU meter shows input, compression or output
Clickless In/Out switch
Conductive plastic potentiometers
Input and output are transformer balanced and fully floating

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.