ART Tube Channel 259 Professional Preamp Compressor Equalizer - The 259 is a single-space, three in one device featuring a tube mic preamp, an optical compressor, and a 4-band, tube-based parametric EQ. The 259 was designed to accommodate nearly any microphone or instrument going to either a digital or analog recording device. Whatever your recording set-up, with proper set up, the 259 can improve the quality of your recorded tracks. This unit was recently checked out by DALAUDIO and found to be in working order. It was missing two knobs, and suitable working replacements have been fitted. It is 100% functional. Please see all photos.

Cash Sale No Holds Call or Text for Pick-up - No Shipping.

From the ART website
This tube-based preamp has over 60dB of gain, +48v phantom power, and a 20dB pad. Independent input and output gain controls are provided. Visual feedback for the amount of tube drive is available via a unique tube character LED array. The optical compressor design is related to ART's critically-acclaimed Pro VLA. The optical compressor features compression and limiting settings, selectable release times, adjustable threshold, and output level controls. Gain reduction is displayed via a 4-segment LED array. The 4-band parametric EQ section provides selectable high and low shelving filters with 2 mid-bands which sweep from 20Hz to 20kHz. The mid-bands overlap from 200Hz to 2kHz for the ultimate in flexibility. Insert points are available between each of the three processing sections. These inserts provide direct outputs from the preamp and the compressor for signal routing flexibility. Additionally, these inserts allow each processing section to be isolated for independent usage or to change the order of the processing sections (eg, you can place the EQ before the compressor).

Features
Professional quality, tube-based microphone/line recording channel
3 independent world-class circuit designs: Tube Preamplifier, Optical
Compressor, and Tube Parametric EQ
Professional processing for use with any digital or analog recording equipment
Smooth, silky, and transparent sound quality
Detented Rotary Controls
VU Level Metering
Tube Character and Gain Reduction LED Arrays
Hand-selected 12AX7A tubes
Full 20Hz to 20kHz Sweep with 2 Mid-Frequency Filter Bands
Internal Power Supply
XLR and 1/4" Input and Output Connectors
1/4" Insert Points between Preamp and Compressor, and Compressor and EQ
Designed and manufactured in USA

Applications
Home, project, and professional recording studios
DI Box for Instruments
FOH Sound Systems
Guitar, bass, and keyboard rigs
Digital Audio Workstations and Computer Recording
MIDI recording and samplers
Voice-Over, Broadcast, and Edit Suites
 
Specifications 
Dimensions: 5.25" D x 19" W x 1.75" H
Weight: 8.0 lbs
Maximum Gain: XLR to XLR: 81dB; 1/4" to 1/4": 63dB
Dynamic Range: >90dB (no weighting)
Input Impedance: 1.67k ohms (XLR), 1M Ohm (1/4")
Output Impedance: 600 ohms (XLR), 300 Ohms (1/4")
Maximum Input Level: +15dBu (XLR), +21dBu (1/4")
Maximum Output Level: +27dBu (XLR), +22dBu (1/4")
Total Harmonic Distortion (THD): <0.1%
Equivalent Input Noise (EIN): -129dBu (XLR to XLR, "A" weighted)
CMMR: 90dB (typical)
Tubes: 2 hand-selected 12AX7a
Phantom Power: +48v DC (switchable)
Compression Ratio: 2.3:1 (comp)/ 6:1 (lim)
Attack Time: 6.5ms
Release Time: 200ms (fast), 70ms-1sec (auto)
EQ Frequency Bands: Low Shelf: 40Hz/120Hz Selectable; Low-Mid Sweepable: 20Hz to 200Hz/ 200Hz to 2KHz
High-Mid Sweepable: 200Hz to 2KHz/ 2KHz to 20KHz
High Shelf: 6KHz/18KHz Selectable
Gain/Frequency Band: ±12dB
Power Requirements: 100-125 VAC, 25W