Yamaha P-45B 88-Key Weighted Digital Piano – Black

Product Overview

The Yamaha P-45B is an 88-key portable digital piano in Yamaha’s P Series. It uses Yamaha’s Graded Hammer Standard keyboard action, which gives lower-register keys a heavier resistance and upper-register keys a progressively lighter response. Four touch-sensitivity settings are available for adjusting how keyboard velocity affects sound output.

The instrument uses Yamaha AWM Stereo Sampling for its piano sound generation and provides 10 preset voices with maximum 64-note polyphony. Built-in functions include Dual mode, Duo mode, four reverb types, a metronome, transposition, and adjustable tuning. Two 6-watt amplifiers drive a pair of 12-centimeter built-in speakers.

The P-45B measures approximately 52.25 inches wide, 6 inches high, and 11.5 inches deep, with a weight of approximately 25 pounds 4 ounces. Connectivity includes USB TO HOST, a sustain-pedal jack, and a standard stereo headphone connection. It does not include conventional five-pin MIDI connectors or a separate auxiliary output.

This black configuration is identified as model P45B and catalog identifier B00UJ9LNDK. The standard package includes the digital piano, music rest, footswitch, AC power adapter, and documentation.

Product Information

Identification

Physical Information

Product Identifier Summary

Model Number

The model number identifies the specific version of the instrument. P45B denotes the black configuration of the Yamaha P-45 digital piano.

MPN

A Manufacturer Part Number is used by manufacturers and distributors to distinguish a specific product configuration for inventory, service, and ordering purposes.

UPC

A Universal Product Code is a standardized 12-digit barcode used for retail identification and inventory management. It can help distinguish the P-45B from other Yamaha piano models and package configurations.

EAN

EAN is an international barcode format related to the GTIN system. A separate EAN value was not included because multiple barcode records are associated with P-45 distribution and an exact independent EAN for this configuration was not established.

GTIN

A Global Trade Item Number identifies commercial products throughout retail and supply-chain systems. UPC-A codes are one form of GTIN.

ASIN

The ASIN identifies the catalog record associated with this P-45B configuration. It is separate from Yamaha’s model and manufacturer identifiers.

ISBN

ISBN identifiers apply to books and certain published works. They are not applicable to a digital piano.

Common Uses

• Beginning and intermediate piano practice.
• Home piano lessons.
• Technique exercises using weighted keys.
• Silent practice with headphones.
• Student and teacher practice using Duo mode.
• MIDI input to compatible computer software through USB.
• Home recording setups using supported MIDI software.
• Rehearsals where a portable 88-key instrument is needed.
• Playing layered instrument voices with Dual mode.

Maintenance and Care

Yamaha specifies basic handling practices intended to protect the keyboard, electronics, finish, and connectors. The instrument should be kept away from liquids, excessive heat, high humidity, dust, and strong vibration.

• Turn the instrument off before cleaning or making major connection changes.
• Use a soft, dry or appropriately maintained cloth for normal exterior cleaning.
• Do not use paint thinner, alcohol, solvents, cleaning fluids, or chemically treated wiping cloths.
• Do not expose the piano to rain or wet environments.
• Avoid direct sunlight, heaters, and excessively hot enclosed spaces.
• Keep heavy objects off the instrument.
• Do not apply excessive force to keys, buttons, switches, or connectors.
• Disconnect attached cables before moving the piano.
• Unplug the AC adapter when the instrument will remain unused for an extended period.
• Keep dust and foreign objects away from keyboard gaps and connectors.

Safety Information

The P-45 is an electrically powered musical instrument. Yamaha’s documentation includes precautions regarding the power adapter, moisture, placement, connections, hearing safety, and unauthorized disassembly.

• Use the specified Yamaha-compatible AC adapter.
• Do not use the AC adapter in wet environments.
• Do not handle electrical plugs with wet hands.
• Do not place containers of liquid on the instrument.
• Do not open or modify internal components.
• Place the instrument on a stable surface or compatible stand.
• Disconnect the instrument if the power cord becomes damaged or if smoke, unusual odors, or abnormal operation occurs.
• Set equipment volume levels low before making audio connections.
• Avoid prolonged headphone use at high or uncomfortable sound levels.
• Yamaha specifies an operating temperature range of approximately 5°C to 40°C.

Technical Specifications

Preset Voices

The P-45 includes 10 internal instrument voices intended to cover basic piano and keyboard performance needs.

• Grand Piano 1
• Grand Piano 2
• Electric Piano 1
• Electric Piano 2
• Pipe Organ 1
• Pipe Organ 2
• Strings
• Harpsichord 1
• Harpsichord 2
• Vibraphone

Product History

The P-45 belongs to Yamaha’s P Series of portable digital pianos. It followed earlier entry-level portable models including the P-35 while retaining the concept of a compact 88-key weighted instrument focused primarily on piano performance.

The P-45 uses Yamaha’s Graded Hammer Standard keyboard and AWM Stereo Sampling technology. Yamaha later introduced newer compact P-Series instruments with revised keyboard actions and updated designs, while continuing to maintain documentation and support information for the P-45.

Key Features

• Full-size 88-key keyboard.
• Graded Hammer Standard weighted action.
• Heavier key resistance in the bass register and lighter resistance toward the treble.
• Four selectable touch-response settings.
• AWM Stereo Sampling sound generation.
• 64-note maximum polyphony.
• 10 built-in voices.
• Four reverb types.
• Dual mode for layering two voices.
• Duo mode for dividing the keyboard into matching pitch ranges.
• Built-in metronome.
• Transpose and fine-tuning controls.
• USB TO HOST connectivity.
• Headphone output.
• Sustain-pedal input.
• Built-in stereo speakers.
• Automatic power-off function.
• Compact cabinet compared with many furniture-style digital pianos.

Package Contents

• Yamaha P-45B digital piano.
• Music rest.
• Sustain footswitch.
• AC power adapter.
• Owner’s documentation.

Keyboard stands, benches, headphones, upgraded sustain pedals, and other accessories are separate unless specifically included as part of a third-party bundle.

Compatibility

Keyboard Stands

The P-45 can be placed on a stable keyboard stand. Yamaha identifies the L-85 as a compatible matching stand for the P-45 and several related P-Series instruments.

Sustain Pedals

The sustain jack accepts the included footswitch and compatible Yamaha sustain pedals. Optional compatible pedals can provide a piano-style pedal shape or half-damper functionality.

Headphones

A standard stereo headphone connection allows private practice. Connecting headphones disables or redirects normal speaker output according to the instrument’s design.

Computers

The USB TO HOST terminal can connect the P-45 to a compatible computer for MIDI communication. Appropriate drivers or software may be required depending on the computer and operating system.

iPhone and iPad

Yamaha provides documentation for connecting compatible iPhone and iPad devices. Appropriate adapters, interfaces, cables, applications, and operating-system support may be required.

MIDI Software

USB MIDI communication allows the keyboard to transmit and receive MIDI information with compatible digital audio workstations, notation programs, educational software, and virtual instruments.

External Audio Systems

The P-45 does not provide a dedicated AUX OUT connection. An external audio setup therefore requires consideration of the available headphone output and the input requirements of the receiving equipment.

Frequently Asked Questions

What is B00UJ9LNDK?

B00UJ9LNDK identifies the catalog record associated with the black Yamaha P-45B 88-key portable digital piano.

What is the model number?

The black configuration is identified as P45B, while the underlying instrument family is the Yamaha P-45.

How many keys does the Yamaha P-45 have?

It has a full 88-key keyboard covering the standard acoustic-piano range.

Are the keys weighted?

Yes. The P-45 uses Yamaha’s Graded Hammer Standard keyboard action.

What does Graded Hammer Standard mean?

GHS uses heavier resistance in the lower register and progressively lighter resistance toward the upper register. The design is intended to approximate the graded resistance found across an acoustic piano keyboard.

Are the keys touch-sensitive?

Yes. The instrument responds to playing velocity and provides Hard, Medium, Soft, and Fixed touch-response settings.

Can touch sensitivity be turned off?

Yes. Selecting the Fixed setting removes normal velocity-dependent volume response.

What sound technology does the P-45 use?

The P-45 uses Yamaha AWM Stereo Sampling for its piano sound generation.

How many sounds does it have?

The instrument contains 10 preset voices covering grand piano, electric piano, organ, strings, harpsichord, and vibraphone sounds.

What is the maximum polyphony?

The P-45 supports up to 64 simultaneous notes of polyphony, subject to voice and performance conditions.

What does 64-note polyphony mean?

Polyphony indicates how many notes the sound engine can reproduce simultaneously. Sustained notes, layered sounds, and pedal use can consume multiple available voices.

Does the P-45 have built-in speakers?

Yes. Two built-in speakers are powered by two 6-watt amplifiers.

Can headphones be connected?

Yes. A standard stereo headphone jack is provided for private listening and practice.

Does it have Bluetooth?

Bluetooth connectivity is not part of the documented P-45 feature set.

Does it have USB?

Yes. A USB TO HOST connection is provided for communication with compatible computers and smart-device setups.

Does the USB connection transmit MIDI?

Yes. The USB TO HOST interface can be used for MIDI communication with compatible software and devices.

Does it have traditional five-pin MIDI ports?

No. Yamaha’s specifications list USB TO HOST but no conventional MIDI DIN connectors.

Can the P-45 control virtual instruments?

Yes. Its USB MIDI output can control compatible software instruments when the computer, drivers, and application are configured correctly.

Does it have an AUX OUT connection?

No dedicated AUX OUT port is included.

Does the P-45 have a sustain pedal input?

Yes. A dedicated sustain jack accepts the included footswitch and compatible optional pedals.

Does it support half-pedaling?

Yamaha lists half-damper support when a compatible optional pedal is used.

Is a sustain pedal included?

Yes. The standard documented P-45 package includes a footswitch.

Is a music rest included?

Yes. Yamaha identifies a music rest as a standard included accessory.

Is a power adapter included?

The standard U.S. P-45B configuration includes an appropriate AC adapter. Yamaha notes that included accessories can vary by region.

Does the P-45 run on batteries?

Battery operation is not listed as a power option in Yamaha’s P-45 specifications. The instrument uses a 12-volt DC power input with a compatible AC adapter.

How much does the P-45 weigh?

The instrument weighs approximately 11.5 kilograms, or 25 pounds 4 ounces.

How wide is the Yamaha P-45?

It is approximately 52.25 inches wide.

How deep is the P-45?

The cabinet is approximately 11.5 inches deep.

How tall is the P-45?

The piano body is approximately 6 inches high without the music rest.

Can the P-45 be placed on a desk or table?

Yamaha states that the instrument can be played on a suitable desk or table, although a compatible keyboard stand is recommended for an appropriate setup.

What Yamaha stand fits the P-45?

The Yamaha L-85 is identified as a compatible matching stand.

Does it have a metronome?

Yes. A built-in metronome is available for practice.

Can the metronome tempo be changed?

Yes. The documented tempo range extends from 32 to 280 beats per minute.

Can the keyboard be transposed?

Yes. The P-45 provides transposition from six semitones below to six semitones above the normal pitch.

Can the overall tuning be adjusted?

Yes. Fine tuning is available around the standard A4 reference pitch.

Does it have reverb?

Yes. Four selectable reverb types are available.

Can two sounds be played together?

Yes. Dual mode allows two compatible voices to be layered across the keyboard.

What is Duo mode?

Duo mode divides the keyboard into two sections with matching pitch ranges. This can allow two people to practice similar passages from opposite sides of the instrument.

Does Duo mode split the keyboard into bass and treble instruments?

No. Duo mode is intended to create two comparable keyboard ranges rather than a conventional bass-and-treble split arrangement.

Does the P-45 have automatic accompaniment?

Automatic arranger-style accompaniment is not part of the documented P-45 feature set.

Does it have a built-in recording function?

A conventional onboard multi-track recording feature is not listed among the P-45’s primary functions. MIDI performance information can be used with compatible external computer software.

Can it connect to an iPad?

Yes, with compatible connection hardware and software. Yamaha publishes smart-device connection documentation for the P-45.

Can it connect to an iPhone?

Yes. Compatible adapters and connection methods depend on the device model and interface.

Does the P-45 automatically turn itself off?

Yes. The Auto Power Off function shuts the instrument down after approximately 15 minutes without key or button activity unless the function is disabled.

Can Auto Power Off be disabled?

Yes. Yamaha documents procedures for disabling and re-enabling the function through keyboard controls.

What is the operating temperature range?

Yamaha specifies an operating range of approximately 5°C to 40°C, equivalent to 41°F to 104°F.

Can alcohol be used to clean the keyboard?

Yamaha advises against using alcohol, paint thinner, solvents, cleaning fluids, or chemically impregnated wiping cloths.

Can the P-45 be used outdoors?

The instrument can be transported for performance, but it is an indoor electronic device and should not be exposed to rain, moisture, excessive heat, dust, or unsuitable environmental conditions.

Can objects be placed on top of the piano?

Yamaha advises against resting body weight or heavy objects on the instrument.

Does it require regular tuning like an acoustic piano?

No mechanical string tuning is required. The digital pitch remains electronically maintained, although the reference tuning can be adjusted when needed to match other instruments.

Can the P-45 be tuned to A4 = 442 Hz?

Yes. The available tuning range includes 442 Hz.

Does it have an acoustic piano mechanism?

No. The P-45 is a digital instrument. Its GHS keyboard uses a weighted mechanism intended to approximate graded piano resistance without using an acoustic piano’s strings and hammer assembly.

Is the Yamaha P-45 the same as an acoustic piano?

No. It reproduces piano sounds electronically and uses a weighted digital keyboard. An acoustic piano generates sound mechanically through strings, hammers, and a resonating soundboard.

Does the P-45 require computer software?

No. Its built-in sounds, speakers, metronome, and performance functions operate independently. Software is only needed for external computer-based functions.

Does it work without headphones?

Yes. The built-in speakers allow independent operation without external audio equipment.

Can two people listen with headphones at the same time?

The instrument has a single standard headphone connection. Multiple-listener setups require appropriate external equipment.

Does the P-45 have a manufacturer warranty?

The U.S. P-45B configuration has been distributed with Yamaha manufacturer warranty coverage. Exact eligibility and terms depend on the sales region, purchase channel, and current Yamaha warranty policy.

Buying Considerations

Weighted Keyboard Action

The GHS keyboard is one of the P-45’s defining characteristics. Players moving from non-weighted keyboards should expect noticeably greater key resistance, particularly in the lower register.

Sound Selection

The P-45 contains 10 voices and focuses primarily on conventional piano practice. It has fewer sounds and production features than arranger keyboards, synthesizers, and more advanced digital pianos.

Polyphony

Maximum 64-note polyphony is sufficient for many conventional piano exercises and performances. Complex sustained passages or layered voices can use available polyphony more quickly.

Speaker System

The internal amplifier system is rated at 6 watts per channel. Users requiring higher sound levels for larger rooms or live performances may need an appropriate external audio solution.

Connectivity

USB TO HOST provides MIDI connectivity, but the P-45 lacks conventional MIDI DIN ports and a dedicated AUX OUT. Connection requirements should be checked before integrating the piano with existing studio or stage equipment.

Pedal Requirements

A basic sustain footswitch is included. Players who require a piano-style pedal shape or half-damper control should verify compatibility with an appropriate Yamaha pedal.

Stand and Bench

The standard piano package does not automatically include a furniture stand or bench. Bundle listings can contain additional accessories, so the exact package contents should be distinguished from Yamaha’s standard configuration.

Portability

At approximately 25 pounds 4 ounces, the P-45 is substantially more portable than a furniture-style digital piano. Its 52.25-inch width still requires an appropriately sized stand, case, vehicle, or storage area.

Customer Feedback Summary

This section is a generalized summary of recurring publicly reported user experiences concerning the Yamaha P-45. These observations are subjective and should not be interpreted as verified technical specifications.

Commonly Praised Aspects

• The weighted 88-key keyboard is frequently cited as a useful feature for piano practice.
• Many users describe the graded action as a substantial improvement over lightweight synth-action keyboards.
• The straightforward control layout is often appreciated by users who primarily want piano functions.
• The relatively compact cabinet is frequently mentioned positively for home practice spaces.
• Users commonly value the ability to practice privately through headphones.
• USB MIDI connectivity is frequently useful for educational programs and computer-based virtual instruments.
• The built-in grand-piano voices are commonly considered suitable for routine practice.

Commonly Reported Limitations

• Some users find the GHS action heavier or slower than they prefer.
• The limited selection of 10 voices is restrictive for users seeking arranger or synthesizer features.
• The built-in speaker system may not provide enough output for larger performance environments.
• The absence of dedicated line outputs can complicate connection to professional audio systems.
• The instrument does not include Bluetooth connectivity.
• Some settings rely on combinations of the Function button and keyboard keys rather than dedicated controls or a display.
• The included basic footswitch may be less suitable for players who prefer the feel of a traditional piano-style sustain pedal.

Opinions concerning keyboard resistance, speaker output, piano tone, and control layout vary by player experience and expectations. Feedback about acoustic-piano realism is inherently subjective.

Related Products

• Yamaha P-35: Earlier entry-level P-Series digital piano related to the P-45.
• Yamaha P-145: Newer compact entry-level model in Yamaha’s P-Series range.
• Yamaha P-125: P-Series digital piano with additional sound, speaker, and connectivity capabilities compared with the P-45.
• Yamaha P-225: Compact P-Series model with updated piano sound and keyboard technology.
• Yamaha L-85: Matching furniture-style stand compatible with the P-45.
• Yamaha FC4A: Piano-style sustain footswitch compatible with supported Yamaha keyboards.
• Yamaha FC5: Compact sustain footswitch compatible with the P-45.

Last Updated

August 9, 2026