Roland PA-250

Visual representation of the mixer's front panel controls and features.

Diagram of the mixer's rear panel connections and I/O ports.

Three-position lever for input channel on/off and effect selection.

Red LED indicating potential distortion in input pre-amplifiers.

Rotary control for trimming input signal levels before the pre-amplifier.

Dual-section rotary for treble/bass frequency adjustment with detents.

Rotary control determining signal sent to the selected effect bus.

Routes input signal to left/right mixing busses for stereo imaging.

Sliding fader for input signal level to mixing busses and effects.

Nine-band graphic equalizers for output channel tone shaping and feedback control.

Adjusts signal level from external sources to mixing busses.

Master control for overall signal level on the Echo Effect Buss.

Adjusts the amount of output signal from the built-in spring reverb unit.

Independent volume control for stereo headphone monitoring.

Sliding faders for overall output level to power amplifiers.

Controls signal level to monitor outputs, independent of master controls.

Switch to control AC power to the unit.

LED indicating that AC power is present in the unit.

Ten-section LED displays showing peak audio power levels.

Jacks for microphones, instruments, and line-level sources.

Inputs for stereo disc playback cartridges with RIAA equalization.

Inputs for external audio sources like rhythm devices or tape decks.

Jacks for connecting line-level outputs from another mixer.

Input for connecting the output of an external echo device.

Connection for the unit's AC power supply.

Output for sending signals to an external echo device.

Line-level outputs for feeding external power amplification or other audio gear.

Line-level outputs for driving external power amplification or other audio gear.

Outputs for connecting to speaker systems.

Grounding post for connecting external equipment ground wires.

Stereo headphone jack for monitoring output signals.

Recommended starting positions for all controls before power-up.

Guidance on connecting speakers, headphones, tape decks, and other devices.

Steps for activating the unit and selecting input channels for effects.

Procedure for adjusting levels and balancing audio for performance.

Obtaining an independent monitor mix without effects.

Obtaining an independent monitor mix with echo effect.

Stacking multiple PA-250 units or connecting to a PA-80.

Using REC OUT/MONITOR OUT for tape recording and playback.

Technical specifications for all input connections, including impedance and levels.

Technical specifications for all output connections, including impedance and levels.

Information on the unit's electrical power usage.

Physical measurements of the PA-250 unit.

The physical weight of the PA-250 unit.