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Peavey KB/A 300 Keyboard Amplifier

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Peavey KB/A 300 Keyboard Amplifier

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$175.00

5.0 (1)

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Page last updated Jul 04, 2026

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$175.00 2 available Used

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Description

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Peavey KB/A-300 keyboard combo 150 watts 1 x 15" & horn The Peavey KB/A-300 superseded the Peavey KB300 and adds features such as a mic input and gain boost for acoustic instruments.

Four channels are available featuring one mic channel and three instrument channels. The instrument channels offer a 1/4" line level input with gain/level knob. A 12dB gain boost switch is also offered on channels two and three. Four band EQ is provided (Low, LowMid, HighMid, High) individually for all of the instrument channels. A Reverb Send knob is available for adding reverb to the inputs.

Channel one contains all the features above, plus, individual 1/4" jacks are provided for send/return and inputs are provided for a Microphone (both XLR and 1/4" inputs are provided).

Features Four channels. Four band EQ. 150 Watts RMS. 15" Scorpion Woofer. Dynamic Tweeter. Record outputs. 4-band channel EQ. DDT compression circuitry. Master control for reverb and level.

Specifications:

Back panel:

Power amp input Preamp output Line output Record output (phonos) Ground lift Remote footswitch jacks for activating reverb and muting channel 2.

Weight: 86.6 lbs. W: 25.125". D: 17.375". H: 26.5".

Product specs

Brand	Peavey
Model	KB/A 300 150-Watt 1x15" Keyboard / Acoustic Amplification System with Horn
Finish	Black
Year	1990s
Made In	United States
Categories	Acoustic Guitar Amps
Color Family	Black
Electronics	Solid State
Number of Channels	4 Channels
Number of Inputs	4 Inputs
Output Power (Watts)	150
Reverb	None
Speaker Configuration	1x15"

FAQs

How many watts is the Peavey KB/A 300 Keyboard Amplifier?: The Peavey KB/A 300 Keyboard Amplifier provides 150 watts of output power, making it suitable for both practice and live performance settings.
How many channels does the Peavey KB/A 300 have?: The Peavey KB/A 300 features four channels, allowing you to connect multiple instruments or audio sources simultaneously.
What type of speaker configuration does the Peavey KB/A 300 use?: The Peavey KB/A 300 is equipped with a 1x15" speaker configuration, which includes a horn for enhanced sound clarity and projection.
Does the Peavey KB/A 300 include built-in reverb?: No, the Peavey KB/A 300 does not have built-in reverb, focusing instead on delivering a clean and powerful sound.
Is the Peavey KB/A 300 suitable for acoustic guitar amplification?: Yes, the Peavey KB/A 300 is designed for both keyboard and acoustic amplification, offering versatility for various performance needs.

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Reviews

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Peavey KB/A 300 Keyboard Amplifier.

Build quality

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The Peavey KB/A 300 is notably heavy, which could be a consideration for transport and setup at gigs.
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Use cases and applications

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This amplifier has been used successfully for bass in a band setting, indicating its versatility beyond just keyboards.
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It is capable of producing sufficient volume to compete with live drums and guitars, suitable for indie music in small to medium venues.
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Owners have successfully enhanced the amp's sound for bass by utilizing external preamps, making it versatile for different musical applications.
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The Peavey KB/A 300 is praised as a great pedal platform, offering flexibility for musicians who use effects extensively.
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Setup and maintenance

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Given its age, checking the functionality of piezo horns and the condition of knobs is recommended before purchase.
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Owners highlight the importance of maintaining clean pots, as this significantly impacts the performance of older Peavey models.
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Comparisons

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The sound quality is described as less refined compared to modern amplifiers, but adequate for its price point.
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Users have found this amp to produce a growling tone, which is particularly appreciated for heavy music styles.
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Features and functionality

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The "Power Amp In" jack allows users to bypass the internal preamp, enabling a more traditional bass amp tone when used with an external bass preamp.
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User experience

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One user found the sound to be significantly better than their previous Fender Rumble 15, highlighting a notable improvement in sound quality and power.
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Described as an "absolute unit," the amplifier is noted for its robust performance, especially with high drive/distortion setups.
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