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QualityKits Audio Kits
K8077: Sub Woofer Kit 100 Watts -  $159.95 
The 100 Watt subwoofer kit contains all necessary parts to build your compact but powerful high quality subwoofer *
* Wooden panels not included!
Assembly Required
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K8098: Audio Analyzer Kit - $79.95
Give your homemade audio gear a hi-tech look with this audio analyzer kit.
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K8095: MP3 Player Kit - $79.95
MP3 Player project kit
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CK194: 2 x 20W Bridges Stereo Power Amp Kit - $38.95
This circuit consists of two separate 20W bridged power amplifiers (one for each channel) based on four TDA2003 monolithic Integrated Circuits
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FA602: 2 Watt Mono Power Amplifier Module - $7.95
2 Watt Mono Power Amplifier Module
Fully Assembled and Tested
FA603: 2 + 2 Watt Stereo Power Amplifier - $10.95
A tiny low cost 2 watt stereo amplifier kit.
To order the kit version click here: FK603
FA604: 8 Watt Mono Power Amplier - $9.95
A mono power amplifier kit using a TDA2030 IC with 8 Watts output.
To order the kit version click here: FK604
FA605: 8 Watt Stereo Power Amplifier - $15.95
This power amplifier 8+8 watt (STEREO) circuit is designed to have only 1 IC to for ease the system development.
To order kit version click here: FK605
FA607: 15 watt mono Audio Amp - $15.95
A low cost BTL amplifier kit. Provides 15 watts.
For the kit version click here: FK607
FA617: Mono Power Amplifier, Tone Control, Volume - $22.95
This amplifier is constructed with TDA 2004 IC
Microphone input, Treble, Bass and Volume control
To order the kit version click here: FK617
FA627: Super Mono Tone Control - $12.95
Super Mono Tone Control Module
FULLY ASSEMBLED & TESTED MODULE
FA628: Super Stereo Tone Control - $23.95
Super Stereo Tone Control Module
FULLY ASSEMBLED & TESTED MODULE
FA657: Power Amplifier 30 + 30 Watt R1% - $34.95
30 Watt Stereo Power Amplifier, R1%
Fully Assembled and Tested
FA674: 2 Watt Mono Power Amplifier Kit w/ Speaker - $11.95
2 Watt Mono Power Amplifier Kit w/ Speaker
FULLY ASSEMBLED & TESTED MODULE
FA675: 2 + 2W Power Amp Kit w/ Speakers - $19.95
This 2 x 2 Watt power amplifier kit is a small amplifying circuit that is suitable for amplifying input signals.
FULLY ASSEMBLED & TESTED MODULE
FK101: V.U. Meter Kit 6 LED (Power Supply Not Required) - $3.95
An affordable V.U. meter kit that gets its power directly from any 10 - 30 watt amplifier.
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FK102: 2 Way V.U. Meter Kit 10 LEDs - $4.95
A two way V.U. meter using 10 LEDs.
Power Supply not required.
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FK103: Wireless VU Meter Kit - $10.95
Wireless VU Meter Kit with 15 LEDs
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FK313: Dual Station Intercom Kit - $8.95
Dual Station Intercom kit with 2 speakers.
Assembly Required
FK326: Dual Station Intercom & Door Bell Kit - $9.95
This intercom kit is a mini communication tool, well known to be used at home, with a microphone which is connected to a loudspeaker to another room.
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FK602: Power Amplifier 2 Watt Kit (Multi Purpose) - $5.95
A small, low cost, low wattage amplifier kit.
Assembled version can be ordered here: FA602
FK603: Power Amplifier Kit 2W+2W (Stereo) - $7.95
A tiny low cost 2 watt stereo amplifier kit.
To order the assembled version click here: FA603
FK604: Power Amplifier IC Kit 8W (Mono) - $6.95
A mono power amplifier kit using a TDA2030 IC with 8 Watts output.
To order assembled version click here: FA604
FK605: Power Amplifier IC Kit 8W +8W (Stereo) - $11.95
A stereo 8 watt line amplifier kit that uses an IC, and provides 8 watts to each channel!
To order assembled version click here: FA605
FK607: Power Amplifier Kit BTL 15W (Mono) - $10.95
A low cost BTL amplifier kit. Provides 15 watts.
For assembled version click here: FA607
FK608: 15 + 15 Watt Power Amp Kit - $18.95
15 Watt Stereo Power Amplifier Kit
Assembly Required
FK608A: Power Amplifier BTL 15 + 15 Watt (Stereo) - $26.95
15 Watt Stereo Power Amplifier. (FA608)
Pre-Assembled and Tested
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FK617: Mono Power Amplifier Kit, Tone Control, Volume - $16.95
This amplifier is constructed with TDA 2004 IC
Microphone input, Treble, Bass and Volume control
To order assembled version click here: FA617
FK625: Mono Tone Control Kit - $6.95
This tone control (Mono) kit is a multifunctional tone controller.
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FK626: Stereo Tone Control Kit - $12.95
This tone control (stereo) kit is a multifunctional tone controller.
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FK627: Super Mono Tone Control Kit - $10.95
This super tone control (mono) circuit need 15-0-15V power supply which is suitable for connecting with OCL amplifier only.
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FK628: Super Stereo Tone Control Kit - $16.95
This super tone control(stereo) circuit need 15-0-15V power supply which is suitable for connecting with OCL amplifier only.
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FK642: Mono Bass Booster Kit - $4.95
This is a mono bass booster circuit that will provide you with high quality sound at a very low cost. It requires 12V power supply. Dim: 2.46" x 1.6" x .45"
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FK643: Stereo Bass Booster Kit - $8.95
This is a stereo bass booster circuit that will provide you with high quality sound at a very low cost. It requires 12V Power Supply.
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FK647: Dynamic Microphone Preamplifier Kit - $3.50
A simple circuit that preamplifies a microphone signal.
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FK648: Condenser Microphone Kit with Pre-Amp - $3.50
This kit is a small circuit with an on-board condenser mic and preamp.
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FK649: Speaker Protection Kit (Mono) - $4.95
If your OCL amp has no protection circuit, you could potentially fry your speaker, unless you use something like this speaker protection kit.
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FK650: Speaker Protector Kit (Stereo) - $8.95
This kit is a low cost, basic stereo speaker protection circuit.
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FK651: Stereo Simulator Kit (Mono In/Stereo Out) - $9.95
This circuit simulates stereo by taking a mono signal, and separating certain frequencies to each channel.
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FK652: 3 Channel Mic Mixer Preamplifier Kit - $8.95
A kit of 3 channels to allow signal from 3 microphones plus another point for music to be mixed.
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FK653: Mono Loudness Kit - $3.95
With 3 frequencies and an amplifiction TR in this mono circuit the increase of londness will be of much higher quality than found in most regular systems which rely on the connection to the tap of the volume.
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FK654: Stereo Loudness Control Kit - $6.95
This loudness circuit uses a 3 stage filter and a simple one transistor amplifier to increases bass and tweeter frequencies.
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FK656: Power Amplifier Kit OTL 30W (Mono) R1% - $9.95
Amplifies a mono signal to 30 watts using 1% metal film resistors. This OTL circuit is without tone control.
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FK657: Power Amplifier Kit 30 + 30 Watt - $17.95
30 watt stereo amp OTL circuit with no tone control.
This kit amplifies a line signal to 30 watts times two channels.
Stereo sound with 1% resistance.
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FK658: 35W Mono Power Amplifier Kit - $11.95
35 Watt Mono Power Amplifier Kit
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FK659: 35 Watt Stereo Power Amplifier Kit R1% - $19.95
35 Watt stereo amplifier circuit
Class AB circuit type.
Can be used for super tone control circuit.
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FK660: 50 Watt Power Amplifier Kit - $14.95
50 Watt Mono OCL Power Amplifier Kit 1% Resistors. Class AB circuit, 1V. input sensitivity and 15 K input resistance.
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FK661: 50 Watt Stereo Power Amp Kit - $25.95
50 Watt OCL R1% Power Amplifier Kit. Class AB circuit, 1V. input sensitivity and 15 K input resistance.
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FK666: 100 Watt Mono Power Amplifier Kit - $31.95
This circuit is a class AB 100 watt mono power amplifier circuit
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FK667: 100 Watt Stereo Power Amplifier Kit - $59.95
This circuit is a class AB 100 watt stereo power amplifier circuit
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FK670: Tape Head Preamplifier (Transistor) - $4.95
Pre-amplifies the signal coming in from a tape player's head. Has 2 amplifiers for stereo use.
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FK671: Sub Woofer Amplifier kit (48W. OCL) - $19.95
This sub woofer kit amplifies 25 to 200Hz frequency range! Great for subwoofer experimentation.
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FK672: Mini Megaphone Kit - $8.95
This is a small amplifier kit which includes preamplifier, condenser microphone and a loudspeaker.
It is easy to use and install.
Ideal as in class, meeting room etc.
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FK673: Mini Power Amplifier Kit 1 + 1 watt - $6.95
This kit is a small stereo amplifier.
- It is easy to use, easy to assemble and install.
- It is suitable for radio, video, computer etc.
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FK674: 2 Watt Mono Power Amplifier Kit w/ Speaker - $8.95
This 2 watt mono power amplifier circuit is a small input signal amplifier kit.
Assembled version FA674
FK675: 2 + 2W Power Amp Kit w/ Speakers - $15.95
This 2 x 2 Watt power amplifier kit is a small amplifying circuit that is suitable for amplifying input signals.
Assembled VersionFA675
FK676: Stereo Headphone Amplifier Kit - $7.95
Head phone Amplifier Kit
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FK702: FM Wireless Microphone Kit (1 State) - $3.95
A condensor microphone kit that transmits FM radio! The frequency depends on the state of the trimmer and the coils.
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FK703: FM Wireless Microphone Kit (2 Stage) - $6.95
A condensor mic kit that transmits to an adjustable FM frequency. This is a two stage version, with two trimmers for optimal frequency adjustments.
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FK903: Two Tone Signal Generator Kit - $2.95
Signal generator kit, two tone.
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FK917: Whisper Amplifier Kit - $8.95
You can hear a whipser with this whisper amplifier kit.
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FK920: Announcer Chime Kit - $6.95
Just like on an airplane, a chime is sounded before the speech to get people's attention.
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FK938: Morse Code Keyer Kit w speaker - $4.95
Audio generator for those who would like to learn Morse Code
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FK941: Digital Voice Recorder Kit (20 - 60 sec) - $22.95
Digital Voice Recorder Kit (20 - 60 sec)
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HSVM100: Heatsink for K8060 & VM100 - $21.95
Heatsink for K8060 and VM100
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K1803: Universal Mono Pre-Amplifier kit - $11.95
Power supply: 10 - 30 VDC/10mA, Output impedance: 1kohm
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K2572: Universal Stereo Pre-Amplifier Kit - $16.95
Adjustable Gain
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K2573: Stereo RIAA correction amplifier Kit - $19.95
RIAA stereo pre-amplifier kit for md pick-ups. Low noise
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K2637: 2.5W Audio Amplifier kit - $16.95
Power supply: 4.5 to 15V DC
(DISCONTINUED) REPLACED BY K8066
K2661: Dual Input Amplifier Kit - $22.95
Two adjustable gain stereo input amplifiers, four programmable operation modes: MIC (symm. Or asymm), mono LINE (symm or asymm), stereo LINE, and PHONO
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K2662: Dual Fader Kit - $34.95
Two stereo channels, peak indication, +3dB, signal to noise ratio: >90dB
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K2663: Dual Tone Control Kit - $44.95
Two stereo channels, tree tone controls (50Hz, 1KHz,15KHz, +/-12dB), signal to noise ratio: >92dB
DISCONTINUED
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K2665: Monitor and Effects Kit - $24.95
Parametric equalizer with controls for attenuation, center frequency and bandwidth to prevent microphone "howl".
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K2668: Dual Stereo VU meter kit - $15.95
Dual Stereo VU Meter Kit
2 x 5 LED indicators
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K3503: 2 x 100 Watt Car Booster Amplifier kit - $194.95
This Car Booster Amp kit comes complete with heatsink and housing
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K4001: 7W mono amplifier kit - $16.95
This 7 watt mono amplifier kit uses the TDA2003 IC
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K4003: 2 x 30W amplifier kit - $32.95
This small amplifier is constructed with the TDA2616 IC, with a maximum supply capability of 2 x 15Wrms (4 ohm) of 2 x 10Wrms (8 ohm).
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K4004B: 200W MONO / STEREO AMPLIFIER KIT - $89.95
Universal, robust and compact are the key words that describe this amplifier.
Universal : A stereo or a mono amplifier. Three input sensitivity settings.
Robust : overload and short-circuit protection, protection against incorrect power supply polarity and thermal protection (option for K4005B). Speaker transient suppression
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K4005B: 400 Watt Mono/ Stereo Amplifier Kit - $149.95
Universal, robust and compact are the words to describe this amplifier.
Universal : A stereo or a mono amplifier. Three input sensitivities are selectable.
Robust : Overload and short-circuit protection, protection against incorrect power supply polarity and thermally protected too (option for K4005B). Speaker transient suppression.
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K4010: 300W MOSFET Amplifier kit - $205.95
DISCONTINUED: REPLACED BY K8040 OR K8060
K4021: LED power meter kit - $44.95
Made for the K4020
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K4040: Stereo Tube (Valve) Amplifier Kit - $1,495.95
Chrome finish. 200W x 2 music power, 2 x 95W rms Class AB, 2 x 15W Class A. 4 or 8 ohm loads.
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K4100: Pre- Amplifier kit - $199.95
Digitally Controlled Pre-Amplifier for such amps as the K4040 or K4020
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K4102: Guitar Pre-Amplifier kit - $39.95
An electric guitar cannot be connected to just any amplifier or audio installation. This pre-amplifier has been designed to solve this problem and provides you at the same time with a headphones output, allowing you to practice without making a sound. Moreover, it is fitted with a special device for tone adjustment, allowing anyone to create their personal sound.
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K4301: Pink Noise Genereator kit - $21.95
To analyze the acoustic properties of a room (usually a living room), a good pink noise generator together with a spectrum analyzer is indispensable. Moreover, a microphone with as linear a frequency characteristic as possible (from 20Hz to 20kHz) is needed. If you have an equalizer available, then the response can not only be checked but also corrected. Easily adapted to produce "white noise"
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K4303: PSU and switching module kit - $36.95
Power supply for Equalizer
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K4304: Mono LED VU Meter kit - $29.95
10 LEDs and an adjustable input
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K4305: Stereo LED VU Meter Kit - $32.95
This kit has 2 rows of 10 LEDs and an adjustable input.
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K4306: Stereo VU Meter kit 2 x 15 LEDs - $54.95
Scale from -23dB to +5dB
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K4307: Audio Power Meter Kit - $39.95
10 LED scale, upto 2000W rms power measurements
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K4601: Audio/ Video Modulator kit - $34.95
Converts audio and video signal to UHF TV signal
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K4700: Two Channel Speaker Protection Kit 220VAC - $35.95
220VAC Anti-plop and DC voltage protection. Comes with its own power supply integrated on the PCB.
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K4701: DC Protection for Loudspeaker kit - $12.95
DC protection kit for loudspeaker has in-line speaker protector.
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K4900: Telephone Amplifier kit - $15.95
Converts telephone line to audio output suitable for amplification. Will drive small speaker independently.
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K8011: Mono Valve power amp Kit - $619.95
90 W rms at 4 or 8 ohms, Input sensitivity: 1V rms. EL34 end valves.
DISCONTINUED
K8020: Tube Pre Amplifier Kit - $359.95
High End Tube Pre Amplifier Kit
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K8021: High End Pre Amplifier Kit - $289.95
Four inputs, high finish, solid aluminum enclosure, HQ ALPS volume potentiometer, audio grade selected op-amps, capacitorless output coupling, highly reliable REED relay input selection, separate left & right input selection, programmable level adjustment.
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K8022: Passive Preamp Kit - $104.95
Passive Pre Amp Kit with RF Remote Control
DISCONTINUED
K8040: Mono MOSFET Power Amplifier Kit - $349.95
High End Mono Mosfer Power Amplifier Kit
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K8060: Discrete Power Amplifier Kit 200W - $36.95
Features
Assembly Required
Fully discrete design using Epitaxial Darlington transistors
DC supply circuit on board with LED indication
Ideal for active speaker system or subwoofer, guitar amp, home theatre systems, instrument amp, etc.
Comes complete with transistor isolators, spacers and bolts
Overload and short-circuit protection
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K8065: Pocket Audio Generator Kit - $34.95
A pocket-style signal generator kit, with a sleek plastic case, and 2 X RCA outputs! Great for testing/repairs, etc. Have the coolest signal generator on your block.
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K8066: 3W Mono Amplifier Kit - $16.95
A small but powerful 3W amplifier!
Has many uses, such as powering tiny speakers, or amplifying microphones, doorbells, etc.
K8081: Powerblock Power Amplifier Kit - $129.95
This power amplifier is an ideal set-up for active speaker use.
Build a high-quality system, using two (stereo) or more (surround) amplifiers.
Due to its auto switch-on, through input signal sensing, the unit can be installed at almost any place.
Comes complete with enclosure and transformer.
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K8084: Volume and Tone Control Kit - $39.95
When using one of our amplifier kits, you always need a volume control and preferably a tone control.
This kit comes with all input/output connections and potentiometers.
It is possible to amplify or attenuate the input signal.
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KN/MIXL: Knob set for 12 channel audio mixer - $124.95
Set of knobs for 12 channel Velleman audio mixer
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KN/MIXS: Knob set for 6 channel mixer - $32.95
Set of knobs for 6 channel Velleman mixer
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MK136: Super Stereo Ear Kit - $8.95
Stereo audio amplifier boosts sound 50 times
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MK146: Pocket VU Meter Kit in Enclosure - $10.95
A sleak, stylish pocket VU meter kit (in enclosure)
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MK163: Electronic Stereo Volume Control - $12.95
Use IR to remotely control your line level signal. Ideal for stereo setups, or PC to stereo.
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MK164: IR Electronic Volume Control Kit with Enclosure - $29.95
Controls the volume of audio signals.
Has two female 3.5mm 1/8" stereo jacks.
One for the input (line level 2Vrms), and one for the output.
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MK190: 5 + 5W Amplifier kit for MP3 Player - $18.95
The MK190 kit is a 5 Watt Stereo amplifier for MP3 Player
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MXA043: Mini Surrond Sound Module 5 Channels - $9.95
5 channel Mini Surround Sound Module can split the signal to fronts, rears and sub woofer outputs (Line level outputs)
Fully Assembled and Tested Module
QK100: Stereo Pre-amplifier & tone control kit - $24.95
Stereo pre-amplifier & tone control kit using TDA1524A.
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QK105: 18W Audio Power Amplifier Kit - $15.95
Low voltage, high power mono 18W Bridged Tied Load (BTL) amplifier kit using the Hitachi HA13118.
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QK106: 50 Watt Hi - Fi Audio Amplfier Kit - $31.95
This 50 Watt amplifier kit uses the TDA7294 monolithic IC
Heatsink in photo NOT supplied
QK139: 1W Stereo Audio Amplifier Kit - $10.95
Uses a TDA7053A to create an integrated stereo power amplifier with volume control. 5 - 18VDC
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QK143: 6 - 10 WATT STEREO AMPLIFIER KIT - $14.95
Very low THD (0.018%) using this TDA2005 as a stereo amplifier module. Direct earth to solder lug on the IC. Small single-sided PCB. Dual log potentiometer on the input. Power supply 8 - 18VDC providing 2A for best results.
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QK146: 32 Second Message Recorder Kit - $39.95
32 Sec Message Recorder Kit with looping option.
High quality ISD2532 included.
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QK17: LM386 Audio Amplifier Kit - $9.95
This Kit is designed as a building block for other projects where a battery-powered, variable-gain audio amplifier is required. 1 Watt.
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QK23: Op Amp Function Generator Kit - $10.00
This Op Amp Function Generator kit is a low cost and simple circuit to generate square, (pseudo) sine and triangle waveforms in the audio range. Uses quad opamp LM348.
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QK27: TDA7052 1 Watt Amplifier Kit - $7.95
This is a 1 watt mono amplifier kit using the TDA 7052 from Philips.
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QK47: 8 Watt Audio Amplifier Kit - $13.95
High power audio amplifier kit using TDA2002, but with a low supply voltage. Proven IC and circuit design. Heatsink supplied as well as all components! 5V - 20V DC supply voltage. Up to 11W output!
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QK48: Class AB Amp kit - $13.95
Learn the basic topics of audio power amplification. Boot strapping, crossover distortion, complementary pairs, push-pull.
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QK50: 25W Mono Amplifer Kit - $12.95
Build your own 25 Watt Amplifier kit!
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QK87: 1 WATT Stereo Amplifier Kit - $12.95
A 1 Watt basic stereo amplifier kit using Samsung KA2209 which is equivalent to TDA2822.
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QK88: 10W Stereo Amp kit - $14.95
TDA2009 10 x 10 W stereo amplifier kit!
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QK98: Preamplifier Kit - $12.50
A pre-amplifier to use with an electret mic or other microphone to boost the signal before feeding into an amplifier.
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VDSPROM4: Karaoke Set - $49.95
Karaoke set with 2 microphones
Fully Assembled and Tested Module
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