Audio Electronic Parts
At Electronic Surplus, we distribute the best audio surplus products on the market. From speakers and cables to alarms and buzzers, our selection of audio electronic parts is almost endless—if you're looking to buy overstock electronics, you’ll be able to find exactly what you need. With equipment from trusted manufacturers like Bose and Hitachi, you can have confidence in the quality of our inventory.
Some of the audio electronic parts that we carry are brand-new, while others are slightly used. Upon arrival, all of our used audio surplus products are carefully inspected to ensure that they’re still working properly. You can also request an audio device if we don’t currently have it in stock.
Browse our selection below.
Items 1-24 of 293
- PROJECTS UNLIMITED PUI - AT-121 - Audio, PZT. Miniature Piezo Audio Transducers. Package of 10.Special Price $6.98 Regular Price $8.95 As low as $3.98
PROJECTS UNLIMITED PUI - AT-121 - Audio, Miniature Piezo Audio Transducer.
PUI Audio, a Projects Unlimited Company, is a leading developer, manufacturer and supplier of quality audio devices and components including indicators, transducers, speakers, microphones and sirens.
Piezo Ceramic Audio Tranducer, 5kHz, 3-28Vp-p 8mA @ 12VDC 85dBA @ 12vp-p.
Resonant Frequency: 4500 HZ +/-500 Hz.
Operating Voltage: 3 - 28 Vp-p
Rated Current: 13 mA
Capacitance: 17,000 pF =/-30%
Current Consumption at 12VDC (Typical): 8 mA
Sound Pressure Level (dBA) at 1" or 30cm: 95 at 12Vp-p.
Temperature Range: Operating -30 C to 85 C, Storage -40 C to 95C
Case: Enclosed 24mm Diameter, 34mm with feet. (3) 45mm-wire leads.
Note: Wire Lenghts are 45mm not 120 as listed on print.
Mount: Flange Mounting (See Attached Diagram)
Wire: 32 AWG Stranded
Wire Color Code: Red Positive (+), Black Negative (-), Blue (Feedback Connection)
Weight: 7.4 grams (0.106) oz
Case Material: ABS. Black
Package of 10.
Alternate: Mouser 490-CPE-121, CPE-121
Made in Taiwan
- KNOBS INC - Berkeley - 144010-2 - Hardware, Knob Cap. For Slide Potentiometers.Special Price $1.19 Regular Price $1.29 As low as $0.69
KNOBS INC - Berkeley - 144010-2 - Hardware, Knob Cap.
Slide-on Mixer/Fader Caps
Upgrade the cosmetics on Older Studio Graphic Equalizers.
For Slide Potentiometers having standard rectangular metal shaft measuring 0.155" x 0.047" (4mm X 1.2MM).
Material: Black Anodized Aluminum Shell, Silver Lined Cap with Nylon Insert
Overall Dimensions: 0.355" x 0.21" x 0.8" Long (9mm X 5.37mm X 20.35mm).
Rectangular / Oval Ends, Very Sharp.
New Old Stock
Applications: High End Audio Multimix and many other model Audio Equalizer Consoles, Instrumentation, Amplifiers or DJ Equipment.
Check shaft measurement, Used on some Moog, Rogue, Behringer, ALPs, Tascam, Akai, Mackie, Yamaha, Soundcraft, Pioneer equipment.
Proudly Made in USALearn More
- ALCOKNOB - KNP-900B 1/8 - Equipment, knob. For 1/8" shaft, Stereos, Amplifiers, Instrumentation.Special Price $5.98 Regular Price $8.00IN STOCK - MORE THAN 100 READY TO SHIP!
ALCO KNOB - KNP-900B Series KPN Knob.
Fits 1/8" shaft, with one set screw.
Heavy, Silver. - Stright Knurled
Matrial: Black Anodized Aluminum with Vertical Pointer.
Dimensions: 0.931 OD x 0.54" high. (33.6 X 13.7 mm)
Applications: Stereos, Amplifiers, Instrumentation. Vintage - Newer Used - Genuine Alco - New Old Stock
- ACME - 6-349 - Hardware, Knob. 1/4" Flattened D Shaft. Stereo , Control, Volume, HI-FI, Amplifier. Package of 2Special Price $6.98 Regular Price $8.50IN STOCK - MORE THAN 1,000 READY TO SHIP!
ACME Hardware, knob.
For 1/4" flattened shaft.
Black Band 0.74" around it for gripping easily.
Material: Attractive Chromed Aluminum.
Dimensions: 0.62" D x 0.90" high.
Note: The orientation of the indicator line is straight up from the center of the 1/4" (D) circle.
Upgrade your Old System with High Quality New Old Stock Knobs.
Applications: Stereos, Amplifiers, Instrumentation.
Vintage - New Old Stock
Package of 2Learn More
- iSPY007 - SPY EAR - Ear Secret Sound Amplifier Device.Special Price $3.98 Regular Price $6.99
iSPY007 - SPY EAR - Ear Secret Sound Amplifier Device.
Almost Sold Out- "The Original Super Ear Spy Lisening Device"
What is this amazing device? This great little gadget is similar to the "disposable hearing aid" you've may have seen advertised on television. It is very small and inconspicuous, yet it can amplify sounds up to 40 or more decibels (that means you will be able to hear some things over 1000 times better!). It is a fun toy for kids, and a useful tool for adults!Just plug in the earphones and turn on the device, adjust the volume to your comfort level, and you are ready to go! You can wear it at your side and amplify all sounds around you, or you can aim the microphone at a source to amplify specific sounds! Batteries not included (Removed).
Description Item # SPM8757405026 Model # SPYEAR
"This device is a powerful secret sound amplifie with built-in high sensitive microphone.
"With this device :
You can listen clearly to people talking secretly.
You can listen to the far away sound of the animals while hunting.
You can spy on people in another room by listening to their conversation.
- Unidentified MFG - VSQ0055 - VFH Matching Box, Coaxial Transformer, Input 75 Ohm to 300 Ohm Output.Special Price $3.98 Regular Price $5.00 As low as $2.98IN STOCK - MORE THAN 100 READY TO SHIP!
- Unidentified MFG - BE-010 - Microphone Windscreens 1-5/8"H x 7/16"IDSpecial Price $2.98 Regular Price $4.50 As low as $1.98
BE-010 Microphone Windscreens
On stage or in a recording studio, a microphone is the most important device you need to capture vocals and instruments. Whether you're cutting your hit single or rocking out in front of a large crowd, your microphone projects everything you do, so having good quality mic accessories just makes sense. Windscreens and grilles are small, lightweight and portable components that can really impact the sound of your performance. Windscreen and grilles are covers that improve the sound quality of a microphone. Normally a windscreen is made from foam and a grille from metal. They act as a filter to prevent popping, breath sound, moisture and wind noise from reaching your mic.
Dimensions: 1-5/8" tall with a 7/16" Diameter Opening and an Inside Depth 1-1/3"
High Quality Multi Foam is ideal for reducing wind, sibilance and pop noise.
Slides on Easily.
(Available in Black or Brown)Learn More
- Eaton - Wire PRO - Amphenol - CDM Electronics - 91-PC4M - Microphone Connector, Din Audio. Male 4 Pin, Chassis.Special Price $16.98 Regular Price $24.50 As low as $10.98IN STOCK - MORE THAN 1,000 READY TO SHIP!
Eaton - Wire PRO - Amphenol - CDM Electronics - 91-PC4M Microphone Connector, Din Audio.
Chrome plated machined brass shells with threaded coupling and black phenolic dielectric. Panel receptacle mounting hole 27/32" diameter. Maximum chassis thickness 1/8". Cable Diameters: 3 contact 0.281 max. 4-6 contact 0.385" max. Rated for 600 volts. Male contacts rated for 5 amps.
Housing Gender: Plug.
Contact Gender: Male.
Contact Rating: 5 Amps
Voltage Rating: 600 V (RMS)
Body: Chrome Plated Machined Brass Shell
Breakdown Between Terminals and Ground: 2000 v
Circuit Count: 4 pin Microphone.
Mounting Type: Panel.
Applications: CB Microphones.
Mates with 91-MC4F1.
New Old Stock
Mates with 91-MC4M
Connector with washer and Nut.
Alternate P/Ns: Newark 39F1292, NSN 5935-00-615-3884
Made in USALearn More
- Unidentified MFG - 7-108 - Audio RF, RCA Male Straight to RCA Male, Right Angle. 8".Special Price $0.98 Regular Price $1.49 As low as $0.79
Unidentified MFG - 7-108 - Audio, RF.
The RCA connector was invented in the 1940s and was first used to connect an amplifier to a phonograph. They are sometimes referred to as phono connectors due to this original purpose, even though they can be used to carry both audio and video from many different devices.
Cable: RCA Male Straight to RCA Male, Right Angle.
Applications: Perfect solution for applications having restrictive space requiring a Molded Right Angle RCA connector. Customer reported example: Heathkit SP2A Preamp InputsLearn More
- Unidentified MFG - 8-348 - Control/Instrumentation Knurled Knob with Pointer Indicator. For 1/4" Shaft, Splined ID.Special Price $2.29 Regular Price $3.00 As low as $1.49IN STOCK - MORE THAN 1,000 READY TO SHIP!
Hardware, Control /Instrumentation Knob with Pointer Indicator.
Fits Standard 1/4" (0.250") Splined ID Shaft.
Push-on Design for Convenient Secure Attachment
Bar Skirted with Indicator Pointer.
Material: ABS Black Plastic.
Dimensions: 0.98" OD x 0.60" high.
Applications: Control Devices (potentiometer, tuner, etc.) on a Radio, Amplifier, Testing Equipment or Musical Instruments, etc.
Vintage - New Old StockLearn More
- Unidentified MFG - F20DP60-55F-D - Speaker, 8 Ohm light weight. Package of 2.Special Price $16.98 Regular Price $28.95IN STOCK - MORE THAN 100 READY TO SHIP!
Depth: 2-1/4" maximum (2" max behind panel).
Some may have a 7 foot, 2 conductor cable with a male RCA plug on one end.
Speaker dimensions: 7-1/8" D, overall with frame is 8".
Note: Package of 2.Learn More
- PRIMO - EM-47A - Audio, microphone. Electric Condenser Microphone CartridgeSpecial Price $24.98 Regular Price $36.50READY TO SHIP - ONLY 80 LEFT IN STOCK!
PRIMO - EM-47A Audio, Microphone.
From live concert sound to recording a movie, pro-audio microphones are critical to the clarity of the sound. Primo's products are use inside many major brands from vocal mics to shotgun camera mics, our quality is perfect for professional and amateurs alike.
Electric Condenser Microphone Cartridge.
Highest quality, very high output into 200Meg Ohm to 500Meg Ohm, using FET AMP with source follower.
Has no internal preamps.
Can withstand very high S.P.L. (sound pressure level over 90db?).
Dimensions: 0.828" (21mm) D x 10.5mm high.
- QUORUM PAAL - PD-300 PAAL Sport - Personal Alarm 107db Loud!Special Price $12.98 Regular Price $16.95 As low as $9.98IN STOCK - MORE THAN 1,000 READY TO SHIP!
QUORUM PAAL - PD-300 PAAL Sport - Personal Alarm Security, Loud.
PAAL Sport 107db Personal Alarm with Door Clip and Pull Pin.
The Sports PAAL is a high quality weatherproof (Waterproof) personal attack alarm, designed to withstand outdoor activities, repels moisture and offers the owner a true sense of protection.
Immediately activated by pulling the special pin/cord or by the included door / window N.O. switch opening up. Deactivate it by replacing the special pin to it's original position.
Battery 9V required, not included.
Approximate Dimensions: 2.75" x 2" x 1" (14.22mm X 11.69mm X 4.32mm).
Weight: 226.8 Grams
Note: Without BatteryLearn More
- PANASONIC - WM-034CY - WM-034 - Audio, Microphone Element. Omnidirectional Electret Condenser Cartridge.Special Price $2.49 Regular Price $3.00 As low as $1.49IN STOCK - MORE THAN 100 READY TO SHIP!
PANASONIC WM-034CY - WM-034 - Audio, Microphone Cartridge.
Omnidirectional Electret Condenser Cartridge.
Part Status : Discontinued
Electret Condenser, Omnidirectional 42db +/-3db.
Frequency Range: 20Hz to 16kHz.
Impedance: 2.2K Ohm. (2200 Ohms)
Sensitivity: -62+/- 3dB
Signal Noise Ratial: 60 dB
Voltage: 4.5VDC, Voltage Range: 4.5 to 10V (Vs)
Output Type: Analog.
Dimensions: Circular 9.7mm Diameter x 6.7mm thick. (0.382" X 0.264")
Through hole Radial PCB mount, 2.54mm (0.100") standard pin spacing.
Termination: Solder Pads.
Applications: Useful for almost any type telephone and other applications.
Alternates: P9992-ND, CTI 42059, YPM-CH022, V79CH
Made in JapanLearn More
- Line Electric - MD-120VAC-5VA - Electromechanical 120VAC, 5VA.Special Price $3.98 Regular Price $5.50
- JENSEN - 25CV4 - Transformer, audio. 25VCT line transformer.Special Price $6.98 Regular Price $9.50IN STOCK - MORE THAN 100 READY TO SHIP!
JENSEN - 25CV4 Transformer, Audio.
Professional Series "Constant Voltage" Transformer specially designed for "constant voltage" distribution system.
Input (Primary): 25 Volt balanced or unbalanced line
Output (Secondary): 8 - Ohm loudspeaker load
Power to Speaker: 4, 2, 1/2, 1/4, 1/8 watts
Frequency Response: +/- 1 dB, 50 - 10,000 Hz
Useful Frequency Response: 30 - 20,000 Hz
Total Harmonic Distortion: 1/2% Max. 100 - 15,000 Hz
efficiency: 80% on 4 watt setting
Nominal Core Size: 5/8" X 5/8"
Overall Dimensions: 2 7/8"Wide, 1 9/16" Heights, 1 3/4" Depth
Mounting Holes 1 3/16" diameter on 2 3/8" centers
Coil/Coil/Core Insulation: 500 volts RMS, 60 Hz
Net Weight: 9 Oz
Vintage Genuine Jensen New Old Stock
Cross: Z3631.Learn More
- ECS INC - ZTA-3.58MG - Ceramic Resonator 3.58MHz. Package of 10.Special Price $3.98 Regular Price $5.00 As low as $2.98
ECS INC - ZTA-3.58MG - Filter/Resonator.
Ceramic Resonator 3.58MHz,
Impedance: 30 Ohm. Tolerance: 0.5%.
Supply Voltage: 100V
Dimensions: 10mm wide x 5mm deep x 7.5mm High.
Package: 2 Pin Radial Leads.
Lead Spacing: 5mm.
Note: Extended Temperature Range.
Additional Information: https://ecsxtal.com/store/pdf/ZTAR.pdf
Package of 10.
- Edwards Signaling Products - CS1088 - 876-N5 - Alarms. Security Horns, 103dB loud, 120VAC.Special Price $74.99 Regular Price $120.95READY TO SHIP - ONLY 30 LEFT IN STOCK!
- CUSTOM - 8-366 - Connector. RCA Male to RCA Male. Package of 3.Special Price $3.98 Regular Price $6.00IN STOCK - MORE THAN 100 READY TO SHIP!
- ASTATIC - T2M-914 - Replacement Omnidirectional Audio, Microphone / Speaker, Electret CartridgeSpecial Price $18.98 Regular Price $26.95 As low as $16.98IN STOCK - MORE THAN 100 READY TO SHIP!
ASTATIC - T2M-914 Replacement Omnidirectional Audio, Microphone /Speaker.
Speaker / Microphone Matches Virtually any Transmitter.
Micro Switch with Positive Snap Action.
Rotable Spring Clip on Back.
Power Requirements: 3 to 12 VDC.
Quality Electret Cartridge.
Lightweight Durable Noryl Housing.
Dimensions: Approximately 2" wide x 3" high x 1.3" D.
Complete with 6 wire Neoprene coil cord, extends to 5-1/2 feet.
Includes Hook-up Instructions.
Electret microphones are a type of electrostatic capacitor-based microphone which eliminates the need for a polarizing power supply by using a permanently charged material.
Proudly Made in USA
- Unbranded - Vintage RCA Audio Panel Mount Strip 2 Way Female Audio Coaxial Connector SocketSpecial Price $2.49 Regular Price $3.50 As low as $1.49IN STOCK - MORE THAN 1,000 READY TO SHIP!
Vintage RCA Panel Mount 2 Way Female Audio Coaxial Connector Socket TV Stereo
Horizontal Panel Mount 2 Way RCA Female Jack Connector Sockets for Various Electronic Connections.
Panel Mount used in various Electrical Appliances, such as TV, Monitor, DVD, Intercom, Computer, Speaker, etc.
Phenolic Chassis Mount Strip W/Solder Terminal and Ceramic Insulator
Overall Length: 1.50" (38.0 mm)
Overall Depth: .845" (21.5 mm)
Mounted Height: 1.0" (25.5 mm)
Vintage New Old Stock
Note: Ceramic insulator can be removed to repair used equipment.
Proudly Made in USA
- Heil ? - FV272/1740 - Audio, Microphones, Dynamic. Element only, Miniature.Special Price $29.98 Regular Price $38.50 As low as $24.98IN STOCK - MORE THAN 100 READY TO SHIP!
FV272/1740 - Audio, Microphone Element, Dynamic.
Dimensions: Approximately .764"X .50" X .36" (19.5 X 12.7 X 9.0 mm)
Strong on Higher Frequencies.
Researching this element to confirm if it is the Heil HC-5 that is in high in demand by Ham Radio Enthusiasts
Note: Purchased from Astatic following their plant closure.
Made in TaiwanLearn More
- Peerless Audio Mfg. - KU45MR - 9514057 - Speakers. 8 Ohm. Size: 4-1/2" Square, 80 W RMS.Special Price $24.98 Regular Price $32.50 As low as $4.98READY TO SHIP - ONLY 79 LEFT IN STOCK!
Peerless Audio Mfg. - KU45MR - 9514057 - Mid-Range Speaker, 4 1/2" Square, ALNiCo Magnet
Founded in Denmark in 1926, Peerless has been delivering high-quality audio solutions ever since, and we’ve used our decades of design and manufacturing expertise to create a line of premium professional drivers and amplifier modules that deliver truly superior sound. From our FEA-optimized motor design to our Kevlar-loaded, non-pressed paper cone, each component has been thoughtfully designed to withstand the rigors of professional applications.
Speakers made with ALNiCo magnets are often raved about as the vintage-certified choice of true tone hounds. The fact that the alloy used to make them is more expensive—thanks to some of the precious metals it includes. ALNiCo speakers are made with magnets containing aluminum, nickel and cobalt.
Mid - Range Speakers.
8 Ohm Coil
Doped surround and 91.5 dB 1 Watt 1 Meter
Heavy ALNiCo Magnet
Kevlar Fiber-Reinforced Non-Pressed Paper Cone
High Temperatue Voice Coil
Size: 4 1/2" Square
Mount: 3 1/2"
Extremely rare and hard to find in any condition
Note: Similar in Characteristics to the well known KO 40 MRF Midrange
Vintage - New Old Stock
Alternate: 95140679.Learn More
- Unidentified MFG - 7-068 - Cable, audio. RCA male to male. Package of 10.$6.00