Condition is excellent. Used this compressor in my home studio.There are tiny marks on the side of the unit.It is invisible if you place it into the rack. Used this comp for a few recording sessions. I switched to SPL Channel Strip as I find I just don't have enough rack space,unfortunately.

No original box.

Tube-Opto Tone With Extended Control: Delivering that revered "forgiving" musical compression with the added speed and control functionality, the WA-1B excels on highly dynamic sources that demand analog warmth.

True-To-Original Controls: To deliver extended dynamics processing, the WA-1B features all of the classic controls of its modern-classic inspiration.

Threshold: The WA-1B supports a variable threshold giving maximum control to the user regarding how much compression is applied to any signal at various input levels.

Ratio: The WA-1B ratio is variable and has infinite controls between 2:1 and 10:1. From soft musical dynamic control all the way to hard-smashing compression!

Attack & Release: The Attack/Release controls on the WA-1B are unique in that the attack/release operations can be switched from a fixed setting, manual (variable) setting, or a combined setting. In the "fixed" mode, the WA-1B delivers the natural attack & release time of the optical element. The combined setting in particular creates the opportunity for a more nuanced release-time curve. This dueling time-constant circuit operation is a special feature of the WA-1B and its original inspiration.

Meter Switch: The WA-1B meter switch has three settings: input, compression, and output levels. Set to "input", the VU meter is reading the level at the input connector. Set to "compression", the VU meter is reading gain reduction. The steady-state is "0", and the amount of compression is shown as the needle moving right-to-left away from 0dB. Set to "output", the VU meter is reading the level at the output connector.

On/Bypass: The on/bypass switch on the WA-1B activates or bypasses the compressor. This is a hard bypass, meaning no signal passes through the circuitry in bypass mode.

Premium Components: The WA-1B is a 270v circuit with handwired through-hole circuitry, and 100% discrete analog signal path. The custom large-core transformers from Lundahl Sweden bring the full Scandinavian-style analog tone of the WA-1B circuit to life. Paired with select tubes from JJ and Tung-Sol, the high-precision optical element applies sweet analog warmth to audio signals with unrivaled accuracy.

Hand-Tested In Austin, TX: Like all Warm Audio gear, the WA-1B is meticulously hand-tested and inspected by trained technicians with a passion for making music in Austin, TX USA.

Accurately recreating world-class Scandinavian compression combining smooth tube-optical warmth with precision controls

True-to-spec 270 volt, 100% discrete analog signal path - handwired with through-hole components

Transformer-balanced fully floating input and output - Custom-core large transformers from Scandinavian Manufacturer, Lundahl in Sweden

12AX7 Tung-Sol & JJ 12AU7 tubes

Frequency response @ -3 dB: 5 Hz to 25 kHz

Self-Noise: < -75 dBU @ 30 dB gain

CMRR: > 60 dB @ 10 kHz

Ratio from 2:1 to 10:1

Variable Threshold: Off to -40 dBU

Continuously variable attack and release times: fast-slow

Output gain: Off to +30 dBU

Input impedance: 600Ω

Two bus connectors to connect multiple sidechains

Meter (VU) input, output, or compression amount

Linear, low-noise power supply with toroidal power transformer