Peavey KB 3 60W 1x12 Keyboard Amplifier with 4-Channel Mixer

Peavey KB 3 60W 1x12 Keyboard Amplifier with 4-Channel Mixer

The Peavey KB 3 is a 60W keyboard amplifier and compact four-channel sound system built around a 12" speaker and high-frequency tweeter. Its integrated mixer accepts keyboards, microphones, acoustic or electric instruments, drum machines, and playback sources, while an external speaker connection can increase available amplifier output to 80W.

Channels 1 and 2 provide dedicated 1/4" inputs with two-band EQ, while Channel 3 adds both 1/4" and low-impedance XLR connectivity plus three-band tone control. A fourth monitor channel accepts a line-level source through its own 1/4" input and level control. This flexible arrangement makes the KB 3 useful as a keyboard combo, rehearsal amplifier, personal monitor, or compact multi-source sound system.

For integration with additional equipment, the KB 3 provides a balanced XLR main output, 1/4" effects send and return, stereo headphone output with independent level adjustment, and a powered external-speaker connection. Peavey's DDT protection helps manage amplifier overload, while the wide 20 Hz to 20 kHz amplifier response supports the broad frequency range required by modern keyboards and full-range program material.

Key Features

• 60W Keyboard Amplifier: Delivers 60W RMS into the internal 8-ohm load for keyboards, instruments, vocals, drum machines, and playback sources.
• Expandable to 80W: An external speaker connection allows the power amplifier to deliver up to 80W RMS into a 4-ohm total load.
• Four-Channel Mixer: Combines three primary instrument or microphone channels with a dedicated fourth monitor input for additional flexibility.
• 12" Speaker with Tweeter: Provides full-range reproduction suited to keyboard tones, backing tracks, vocals, and other wide-bandwidth sources.
• Flexible Channel EQ: Channels 1 and 2 include two-band low/high EQ, while Channel 3 adds dedicated midrange adjustment for three-band control.
• Microphone and Line Connectivity: Channel 3 accepts both low-impedance XLR and high-impedance 1/4" sources.
• Effects Loop: Separate 1/4" send and return connections insert external processors before the power-amplifier section.
• Professional Outputs: Includes a balanced XLR main output plus a stereo headphone connection with independent level control.

Four-Channel Mixing for Keyboards and More

The KB 3 functions as more than a single-input instrument amplifier. Channels 1 and 2 handle high-impedance microphone or line-level sources through 1/4" connections, while Channel 3 provides both 1/4" and low-impedance XLR inputs. Channel 4 serves as a dedicated monitor input for an additional line-level source.

Independent EQ and Level Control

Channels 1 and 2 feature active low and high shelving controls with ±15 dB adjustment. Channel 3 adds an active ±15 dB midrange control, giving microphone or instrument sources additional tonal shaping. Separate channel-level controls feed a master volume control for straightforward multi-source balancing.

External Speaker and 80W Operation

The internal speaker system operates from 60W RMS into 8 ohms. Connecting a suitable external speaker cabinet in parallel changes the amplifier load and allows rated output of up to 80W RMS into 4 ohms. Peavey specifies an 8-ohm minimum impedance for the connected external speaker enclosure.

Effects, Headphones, and Balanced Main Output

A 1/4" effects send and return pair allows an external processor or equalizer to be inserted before the power amplifier. The electronically balanced XLR main output feeds a mixer, recorder, or other compatible destination, while the stereo headphone output has its own level control independent of the master setting.

Technical Specifications

• Brand: Peavey
• Model: KB 3
• Product Series: KB Series
• Manufacturer Part Number: 00573180
• Product Type: Keyboard Amplifier
• Color: Black
• Connectivity: Wired
• Channels: 4
• Internal Power Output: 60W RMS into 8 ohms
• Maximum Power with External Speaker: 80W RMS into 4 ohms
• Rated Power Measurement: 1 kHz, 1% THD at 120V AC line voltage
• Speaker Configuration: 1 x 12" speaker with tweeter
• Channel 1 Input: 1/4"
• Channel 2 Input: 1/4"
• Channel 3 Inputs: 1/4" high-impedance input and XLR low-impedance input
• Channel 4 Input: 1/4" monitor input
• Channel 1 and 2 EQ: 2-band low/high, ±15 dB
• Channel 3 EQ: 3-band low/mid/high, ±15 dB
• Effects Loop: 1/4" send and 1/4" return
• Main Output: Electronically balanced XLR
• Headphone Output: 1/4" stereo with independent level control
• External Speaker Output: 1/4" powered output
• Minimum External Speaker Impedance: 8 ohms
• Channel 1 and 2 Input Impedance: 100 kΩ
• Channel 1 and 2 Nominal Input Level: 1.5 dBV / 1.2 V RMS
• Channel 1 and 2 Minimum Input Level: -16 dBV / 158 mV RMS
• Channel 3 Low-Z Input Impedance: 10 kΩ
• Channel 3 High-Z Input Impedance: 75 kΩ
• Channel 3 Nominal Input Level: -21 dBV / 89 mV RMS
• Channel 3 Minimum Input Level: -38 dBV / 13 mV RMS
• Channel 4 Input Impedance: 10 kΩ
• Channel 4 Nominal Input Level: 0 dBV / 1 V RMS
• Channel 4 Minimum Input Level: -25 dBV / 56 mV RMS
• Headphone Load Impedance: 8 ohms or greater
• Headphone Nominal Output: 100 mW RMS
• Main Output Impedance: Less than 100 ohms
• Main Output Level: 18 dBV
• Amplifier Frequency Response: +0/-1 dB, 20 Hz to 20 kHz at 30W RMS into 8 ohms
• DDT Dynamic Range: Greater than 20 dB
• DDT Maximum THD: Less than 0.5% at 6 dB overload; less than 1% at 20 dB overload
• Hum and Noise: Greater than 100 dB below rated power
• Domestic Power Consumption: 120W at 120V AC, 50/60 Hz
• Export Power Consumption: 120W at 220-230/240V AC, 60 Hz
• Net Weight: 52.5 lb
• Packed Weight: 57.3 lb
• Packed Dimensions: 24.5" x 24" x 18.1"

What's In the Box

• Peavey KB 3 Keyboard Amplifier
• Detachable AC mains power cord