Price drop to $150 shipped
FET compressor in very clean condition w/ manual and box, two strips of 3M low profile fastener on back. Previous seller's pix below:

Shipping included, CONUS only, PayPal or Venmo payment - PM w/ questions - thanks!
The TZZ1954FCL Differs From The Industry Standard By Offering A Continuously Variable Compression Ratio And Independent Continuously Variable Threshold Control. Additionally A Direct Signal Level Control Is Provided To Allow Blending Of The Uncompressed Attack Transients For A More Natural Attack If That Is Desired.
Attack Time Is Continuously Adjustable From Less Than 20microseconds To 800microseconds. The Fast Attack Time Response Is Independent Of Peak Frequency Content Or Duration. Over The Audio Band The Full Limiting Action Will Stabilize In Under A Half Cycle. Release Time Is Continuously Variable From 50msec To 1.1sec. Release Time Is Defined As The Time It Takes For The Gain To Recover To Within 63% Of The Normal Non-Limiting Gain.
9VDC Battery Operation Or Standard 9V DC Power Supply.
FEATURES
Seven knobs to control - Input Level, Output level, Attack, Release, Compression Ratio, Threshold, and a direct signal level control to allow blending of the uncompressed attack transients for a more natural attack
True bypass on/off switch
9-volt operation and standard DC input providing an 18V dynamic range
FET compressor in very clean condition w/ manual and box, two strips of 3M low profile fastener on back. Previous seller's pix below:

Shipping included, CONUS only, PayPal or Venmo payment - PM w/ questions - thanks!
The TZZ1954FCL Differs From The Industry Standard By Offering A Continuously Variable Compression Ratio And Independent Continuously Variable Threshold Control. Additionally A Direct Signal Level Control Is Provided To Allow Blending Of The Uncompressed Attack Transients For A More Natural Attack If That Is Desired.
Attack Time Is Continuously Adjustable From Less Than 20microseconds To 800microseconds. The Fast Attack Time Response Is Independent Of Peak Frequency Content Or Duration. Over The Audio Band The Full Limiting Action Will Stabilize In Under A Half Cycle. Release Time Is Continuously Variable From 50msec To 1.1sec. Release Time Is Defined As The Time It Takes For The Gain To Recover To Within 63% Of The Normal Non-Limiting Gain.
9VDC Battery Operation Or Standard 9V DC Power Supply.
FEATURES
Seven knobs to control - Input Level, Output level, Attack, Release, Compression Ratio, Threshold, and a direct signal level control to allow blending of the uncompressed attack transients for a more natural attack
True bypass on/off switch
9-volt operation and standard DC input providing an 18V dynamic range