P2500S

2Ch 250W 8ohms Stereo Power Amplifier

Overview

The Yamaha P2500S is a rack-mountable stereo power amplifier for sound reinforcement applications offering 250 watts per channel at 8 ohms and a moderate weight for its size. The P2500S has been optimized for use with Yamaha's Club Series speakers and is equipped with a YS engagement switch, which activates proprietary circuitry that matches the output of the amplifier to the capability of the speakers; that being said, speakers from all other manufacturers are supported as well and the YS circuitry is defeatable. Another exclusive feature of the P2500S is the EEEngine energy conservation design, which obtains the same full output that conventional amplifier designs offer, but with half the power consumption. This attribute, in conjunction with a full complement of thermal and limiting overload protection, allows for cooler, quieter operation and improved frequency response with minimized distortion. The P2500S has XLR and 1/4" balanced inputs and Neutrik Speakon, binding post and 1/4" speaker outputs for connection to almost any sound system. The rear panel offers several filtering options, the YS activation switch, and a mode switch - the amplifier supports stereo, bridged, and parallel operation. There is a comprehensive group of bright, color-coded LED activity indicators, and the front panel channel attenuator knobs are thoughtfully recessed and protectively covered. Yamaha has built a lot of value into the P2500S and made it available to budget-conscious schools, club date musicians, and event facilities at a very reasonable price.

Features

• Rack-mountable stereo power amplifier with 250 watts per channel at 8 ohms

• EEEngine (Energy Efficient Engine) technology for high power output with half the energy consumption of conventional amplifier designs

• Proprietary YS processing with dedicated on/off switch optimizes amplifier output for use with Yamaha Club Series speakers

• Amplifier overload limiting protection circuitry includes power on/off muting, DC detection, thermal protection, and current limiting

• Variable speed fan cooling

• Sweepable rear panel low end frequency control knobs, low cut/subwoofer filter switches

• Rear panel stereo/bridge/parallel operation mode switch

• Recessed front panel attenuator controls with protective cover

• Front panel LED indicators for power, protection, temperature, YS processing, signal, and clip

• Vented front and rear panels

Specifications

Output PowerRating @ 1kHz, THD=1%

275W @ 8Ω Stereo (per channel)

390W @ 4Ω Stereo (per channel)

780W @ 8Ω Bridged-Mono

Rating @ 20Hz - 20kHz, THD=0.1%

250W @ 8Ω Stereo (per channel)

310W @ 4Ω Stereo (per channel)

620W @ 8Ω Bridged-Mono

Rating @ 1kHz, 20ms Nonclip

650W @ 2Ω Stereo (per channel)

1300W @ 4Ω Bridged-Mono

Damping FactorGreater than 200 (8 ohms, 1kHz)

Input Sensitivity+3dB (8 ohms, Max Attenuation)

Input Impedance30 k ohms (Balanced)

15 k ohms (Unbalanced)

Gain32.1dB

Frequency Response20Hz - 50kHz (0dB, +0.5dB, -1dB @ 1 Watt, 8 ohms)

Signal-to-Noise Ratio100dB

Total Harmonic Distortion (THD)Less than 0.1%, 20Hz - 20kHz, Half Power

Input Connections2 x 3-pin XLR Female (Balanced)

2 x 1/4" (6.3mm) TRS Phone (Balanced)

Output Connectors2 x Speakon

2 x 5-way Binding Post

2 x 1/4" (6.3mm) Phone

Controls Front Panel1 x Push On/Off Power Switch

2 x 31-Position Attenuator Knobs

Controls (Rear)1 x Stereo/Bridge/Parallel Mode Switch

2 x Subwoofer/Low Cut/Off Filter Switches

2 x 25Hz - 150Hz Frequency Control Switches

1 x Yamaha Speaker Processing On/Off Switch

Indicators1 x Green Power On LED

1 x Red Protection LED

1 x Red Heatsink Temp Overheat LED

1 x Yellow YS Processor LED

2 x Green Signal LEDs

2 x Red Clip LEDs

CoolingDual Variable-Speed Fans

Power ConsumptionIdle: 25W

1/8 (4 ohms): 320W

Maximum (4 ohms):1600W

Power Requirements120V 60Hz

Dimensions19 x 3.5 x 18" (483 x 89 x 457 mm)

Weight30.9 lbs (14 kg)

SpecialtiesProprietary EEEngine Operating Efficiency Design

Limiter Amp Protection Circuitry

YS Processing

Packaging Info 

Package Weight34 lb

Box Dimensions (LxWxH)22.5 x 22 x 8"

What’s in the Box

- Yamaha P2500S

- Owner’s manual

- Security cover (with a hex wrench)