The JBL UREI Model 6215 is a vintage two-channel (stereo) power amplifier from the 1980s, designed for professional sound systems and able to operate in normal stereo, dual mono, or bridged mono modes. It features a differential input with balanced operation, multiple input connector options including XLR and phone jacks (if you need RCA/TS Adapters let us know), and five-way output binding posts for flexibility. The 6215 offers 35 WPC at 8-ohm/ 45 at 4-ohm and bridged 90 watts. It is protected against short circuits and excess DC voltage. This unit was tested buy DALAUDIO and found to be in working condition. The case is in decent physical condition but appears painted as the top black paint is flatter than the side. It is presentable.

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As a side note this amplifier derives output power from the STK-2240, a thick film hybrid integrated circuit (IC) audio power amplifier module, specifically a 2-channel pure complementary output stage. It functions as a single component stereo power amplifier, known for high-quality sound reproduction and efficient power consumption in many audio applications. The chip is a vintage Sanyo original.

Key Features
Stereo/Mono Modes: Can be set to normal stereo, dual monophonic, or bridged monophonic mode via rear panel switching.
Input Options: Accepts balanced inputs 3-pin XLR or 1/4" (6.3 mm) phone jack, and barrier strip for direct terminal connections.
Active Differential Input: Provides balanced input without the need for a transformer.
Output Connections: Five-way binding posts accommodate standard banana plugs, bare wire, or terminal lugs.
Protection: Includes short circuit protection with internal relay to disconnect the load in case of amplifier failure or excess DC voltage.
Power Ratings: 35W per channel into 8 ohms, 45W per channel into 4 ohms (20 Hz-20 kHz) and 90W into 8 ohm bridged mode.

Vintage Context
The 6215 is part of JBL's 6200 Series of amplifiers designed with features for professional and installed sound applications, ensuring reliable performance in various settings. While it is a discontinued model, its original owner's manual and schematic are still available, and the amplifier is considered a vintage audio component.