This is Billy Corgan of Smashing Pumpkin's Roland SRV-2000.  One of the most storied reverbs in music history and used by one of the most stories artists of popular music.  

I bought it from Billy's store and have not ended up using it.  I've actually never used it outside of just powering it on. 

Per Roland 

Thorough analysis of actual reverbrated sounds in numerous acoustic environments allowed Roland to determine the kinds of parameters necessary for a digital reverb to effectively simulate an acoustic environment. The SRV-2000 features all such parameters and cna thus simulate all acoustic envirnoments of any shape, any size, and any building material, from small rooms to big halls, churches, even tunnels!

The SRV-2000 incorporates a 16-bit A/D/A converter which converts analog signals into digital signals. The core of the SRV-2000 is a 28-bit, parallel-operation signal processor which serves as the arithmetic-operation circuit. All analog circuits feature discrete cinstruction to reproduce digital reverb sounds without loosing clarity or subtlety. The SRV-2000 offers an S/N ratio of 80 dB, a frequency response between 30 Hz and 10 kHz, a dynamic range of 90 dB, and a THD of 0.03%.
Made in Japan, 1985. Case NOT included.

FRONT PANEL

Input Attenuator: 1

Controls:
Reverb Mode Pre-Delay Time, Reverb Time, HF Damp, Reverb Selection, Reverb Output Level: Up/Down,
Non-Linear Mode Pre-Delay Time, Reverb Time, Gate Time, Non-Linear Output Level: Up/Down,
Equalizer Mode Filter Select, Q Control, Frequency, Boost/Cut: Up/Down, Pre-Delay Time, Reverb Time, HF Damp, Reverb Selection, Reverb Output Level: Up/Down,
MIDI Mode MIDI Program Number, MIDI Channel: Up/Down, Omni: On/Off

Switches: Copy, Write, MIDI, Reverb/Non-Linear, Equalizer, Room Simulate, Bypass

REAR PANEL

Connection Jacks: Input, Output (A, B)

Remote Control Jacks: Preset Shift Up, Preset Sift Down, Effect On/Off 1 (Add On), Effect On/Off 2, Infinite On/Off

MIDI Connectors: In, Thru

Control: Balance (Direct/Reverb)

Switch: Input/Output Level Select: (+4/-20 dBm)

 Specifications

Input Level/Impedance: +4 dBm/56 kOhm, -20 dBm/56 kOhm

Stereo Output Level: +4 dBm (+18 dBm max), -20 dBm (-5 dBm max)

Output Impedance: 100 Ohm (+4 dBm), 650 Ohm (-20 dBm)

A/D/A Conversion System: 16-bit linear

Memory Capacity: 48 kbytes

Frequency Response: 10 Hz to 50 kHz +0(-1 dB (Direct), 30 Hz to 10 kHz +1/-2.5 dB (Reverb)

S/N Radio at Rated Input/Output (IHF-A): 95 dB (Direct), 80 dB (Reverb)

Dynamic Range: 105 dB (Direct), 90 dB (Reverb)

THD at 1 kHz, Rated Input/Output: 0.01% or less (Direct), 0.03% or less (Reverb)

Pre-Delay Time: 0.1 to 99 s (Reverb Mode), -0.9 to 99 s (Non-Linear Mode), adjustable in 0.1 s steps from -0.9 to 9.9 s, and 1 s steps from 10 to 99 s

High Frequency Damping Control: x 0.05 to x 1

Reverbration Selection: Room (0.3,1.0, 7.0, 15, 22, 26, 32, 37), Plate (A, B)

Equalizer Characteristics: Low Frequency Control (Cutoff Frequency: 40 Hz to 1 kHz, Boost/Cut: -24 to + 24 dB), Parametric (Middle Frequency: 250 Hz to 9.99 kHz, High Frequency: 800 Hz to 9.99 kHz, Q: 0.2 to 9; adjustable in 0.1 steps, Boost/Cut: -24 to + 12 dB)

482 (W) x 362 (D) x 47 (H) mm (19" x 14-1/4" x 1-7/8"), 19" rack-mountable (EIA-1U)

Weight: 5.2 kg (11 lb. 7 oz.)