Amplifiers
 

 



$14.89

K17 Kit 17 LM386 Audio Amplifier Module

This Kit is designed as a building block in other projects where a battery-powered, variable-gain audio amplifier is required. Up to 2W.

 





$11.89

K27 Kit 27 TDA7052 1W Amplifier Module, Mono

A 1W power amplifier building block designed to be part of a larger project needing a low power battery operated amplifier into an 8 ohm speaker.

Scan of PCB

 





$21.78

K47 Kit 47 LM383/TDA2002 Amplifier Module

A proven & popular power amplifier building block for use in any audio project. Power output is dependent on the supply voltage and load resistance. Over 10W is typical for a 16V supply into a 2 ohm speaker. A 12V supply into a 4 ohm speaker will deliver around 4W. Small heatsink provided. In late 2000 the LM383 was discontinued but the TDA2002 is a direct replacement.

Scan of PCB

 





$19.96

K48 Kit 48 Introduction To Class AB Amplifiers

Using amplifier modules is modern, quick and easy but it teaches nothing about how they work. Here is a Class AB amplifier made from individual components which will deliver several watts of power into an ordinary 8 ohm speaker. Gives hands-on learning about cross-over distortion, bootstrapping, complementary pairs, and push-pull. Detailed explanations given.

Scan of PCB

 





$16.33

K50 Kit 50 25W HiFi Audio Amplifier Module

Kit contains the essential components to build a hifi amplifier module using the LM1875 IC. Heatsink, speakers and cables are to be supplied by the user.

LM1875 data sheet

Scan of PCB

 



$14.99

K87 Kit 87 1W Stereo Amplifier Module

This stereo amplifier module uses the Samsung KA2209 8-pin IC. This is equivalent to the TDA2822. The circuit is the standard text-book circuit for this chip. No heat sink is required.

Scan of PCB

 





$23.46

K88 Kit 88 10W+10W Stereo Amplifier Module

The TDA2009 is a class AB dual Hi-Fi Audio power amplifier monolithic IC designed for quality stereo applications. This is the standard data book application circuit using a minimum of external components. Each channel is capable of delivering 10 watts into 4 ohm speakers using a 24Vdc supply voltage. Dimensions = 79mm x 50mm

TDA2009A Data Sheet

Scan of PCB

 


$25.90

K89 Kit 89 Stereo VU Meter

A simple, low cost stereo VU meter. Two LM3915 dot/bar display driver ICs are used to drive 2 rows of 10 LEDs (14 green, 6 red) in a moving bar display. Each row of LEDs spans a power range of 0-30 dB in ten 3-dB steps. This VU meter indicates "peak music power" when used with audio amplifiers. Ideal add-on for any of the amplifier kits. Dimensions = 65mm x 42mm.

Scan of PCB

 





$18.77

K90 Kit 90 3W+3W Stereo Amplifier module

A simple stereo 3 watt per channel amplifier based on the BA5406 power amplifier monolithic IC. Minimum component count. Runs on 12Vdc power supply. Good general purpose amplifier. Dimensions = 67mm x 38mm. Requires heatsink (supplied.)

BA5406 data sheet

Scan of PCB

Back to top





$18.15

K97 Kit 97 4 Watt Amplifier Module

using the LM380. The IC solders directly to the PCB so no heatsink is required.





$10.89

K98 Kit 98 Preamplifier

General preamplifier. It has a gain greater than 40dB which is enough for most applications. It can also take input from an electret microphone by adding one extra resistor (supplied in the kit.)



$29.50

K100 Kit 100 Stereo Preamplifier & Tone Control Unit

Contains all components to make a tone control & pre-amplifier unit. Signal processing is done in the TFS1524A by voltage controller amplifiers and filters. 12V-15VDC supply. Single-sided PCB. Off/on switch in potentiometer.





$20.90

K105 Kit 105 18W BTL Audio Power Amplifier Module





$36.50

K106 Kit 106 50W Hi-Fi Audio Amplifier Module

The TDA7294 monolithic IC is at the heart of this 50W amplifier module from ST Electronics. It is intended for use as an audio class AB amplifier in hi-fi applications. + / - 30V supply needed. Important: the user must supply a heatsink rated at 1.4 deg C / W. All components supplied.





$13.50

K115 Kit 115 1W Stereo Amplifier

Uses 2 LM386N-1 for a stereo amplifier. Ideal for Walkman and other battery powered items. 4V - 12V DC.





 $12.90

K139 Kit 139 1W Stereo Amplifier Module with DC Volume Control. TDA7053A.





 $17.40

K143 Kit 143 6 - 10W Stereo Amplifier Module using TDA2005

We spent alot of time getting the tracks right on this single sided PCB to get the lowest possible THD. Getting the separate tracks to the earth pin is the secret.

We tried to do a mono version using the same chip but we could not get the THD to acceptable levels so we cancelled it.

$22.50

 

 

K155 Kit 155 Stereo Tone Control

 

 

 

DISCRETE POWER AMPLIFIER 200W-K8060

Price: $38.20

Features

  • excellent value for money

  • 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

Specifications

  • 200W music power @ 4 ohm load

  • 100Wrms power @ 4 ohm load

  • 70Wrms power @ 8 ohm load

  • distortion: 0.02% @ 1KHz/10W

  • damping factor: >800

  • frequency response: 3Hz to 200KHz (-3dB)

  • sensitivity: 0.6Vrms

  • signal to noise ratio: 115dB

  • power supply: 2 x 25-30Vac / 120VA

  • PCB dimensions: 107x62mm (approx.)

  • recommended heatsink: HSVM100 (pre-drilled) or S44/75 (not drilled)

  • recommended power transformer:

    • 230VAC input, 2 x 30VAC output: 12030

    • 115 / 230VAC input, 2 x 25VAC output: TR8040 (output power reduced by 15%)

POWERBLOCK - POWER AMPLIFIER-K8081

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.
 

Features

  • fully discrete design using Epitaxial Darlington transistors

  • includes all connectors, transformer and enclosure

  • overload and short-circuit protection

  • DC error protection with LED indication

  • automatic switch-on upon input signal sensing (automatic switch-off after a period of no signal)

Specifications

  • 200W music power @ 4 ohm load

  • 100W rms power @ 4 ohm load @ 10%THD

  • distortion: 0.02% @ 1KHz/10W

  • damping factor: >800

  • frequency response: 3Hz to 200KHz (-3dB)

  • sensitivity: 0.6V rms

  • signal to noise ratio: 115dB

  • power supply: 235 or 115 Vac

  • dimensions: 195 x 180 x 60mm (7.7" x 7" x 2.4")

Price: $170.85

VOLUME AND TONE CONTROL - PREAMPLIFIER-K8084

Price: $40.80

When using one of our amplifiers (big or small), you always need a volume control and preferably also a tone control.
This kit comes complete with all input / output connections and potentiometers.
Furthermore it is possible to amplify or attenuate the input signal.

Features

  • stereo volume control

  • stereo Baxandall bass and treble control

  • bass and treble potentiometers with centre click

  • customizable attenuation or amplification

  • complete with knobs

Specifications

  • supply voltage: 2 x 12VAC / 100mA

  • frequency response: 3Hz - 500kHz (-3dB)

  • standard amplification: x1

  • signal to noise ratio: 98dB

  • harmonic distortion: < 0.005% (@1KHz)

  • maximum output: 5V RMS

  • tone control:

    • + and -15dB @ 20Hz

    • + and -15dB @ 15kHz

  • Input impedance: 50k ohms

  • PCB dimensions: 105 x 70mm / 4,1 x 2,75"

UNIVERSAL MONO PRE-AMPLIFIER-K1803

This kit has been developed as pre-module for a number of audio applications where there is insufficient input signal. Applications as a microphone pre-amplifier or for level correction.

Specifications

  • power supply: 10-30V DC / 10mA

  • output impedance: 1Kohm

  • adjustable output level: max. 40dB

  • frequency range: 20Hz to 20kHz 3dB

  • max. input signal: 40mV

  • PCB dimensions: 1.2" x 1.7"

Price: $10.60

UNIVERSAL STEREO PRE-AMPLIFIER-K2572

Universal low-noise stereo pre-amplifier.

Specifications

  • frequency range: 40Hz - 30kHz (-3dB)

  • max. input voltage: 50mVrms

  • adjustable gain: 40dB max.

  • output impedance: 1Kohm

  • power supply: 10-30V DC / 5mA

  • PCB dimensions: 1.7" x 2.6"

Price: $20.80

STEREO RIAA PRE-AMPLIFIER-K2573

RIAA stereo pre-amplifier for md pick-ups. Low noise.

Specifications

  • supply voltage: 10 -30V DC / 5mA regulated

  • gain (1kHz): 35dB

  • input signal: 5 - 10mV

  • input impedance: 47Kohm

  • PCB dimensions: 1.7" x 2.6"

Price: $19.20

AM/FM ANTENNA AMPLIFIER-K2622

This amplifier provides 22dB gain wherever you need it. DC power supply directly or via the coax cable. Metal housing included.

Specifications

  • gain: 22dB

  • power supply: 12V to 15V / 3mA

  • input- and output impedance: 50 - 75ohm

  • frequency range: 10MHz to 150MHz

  • dimensions: 3.4" x 1.4" x 0.9"

Price: $25.20

3W MONO AMPLIFIER-K8066

Price: $16.80

Small but powerful amplifier suits a wide range of applications such as : microphone amp, for doorbells, melody generators, intercom, sound effects, earphones, radio receivers, PC sound card, musical instrument

Features

  • compact size

  • low partcount

  • no additional heatsink required

  • single supply

  • wide supply range

  • excellent protection

Specifications

  • output power: 3Wrms (4-8 ohm, 15VDC, 10% THD)

  • frequency range: 50Hz - 20kHz (1W/8ohm, -3dB)

  • gain: 32dB (40x)

  • thermal protection

  • short circuit protection

  • power supply: 6 ~ 15VDC

  • current consumption: 500mA max.

  • dimensions: 1.6" x 1.9"

7W MONO AUDIO AMPLIFIER-K4001

This small amplifier is constructed around the TDA2003 IC, capable of delivering 4Wrms at 4ohms. The IC is completely thermally and short-circuit protected. A conventional direct current can be connected as supply.

Specifications

  • music power output: 7W / 4ohm

  • RMS output: 3.5W / 4ohm or 2W / 8ohm

  • total harmonic distortion: 0.05% (1W / 1kHz)

  • frequency response: 20Hz to 20kHz (-3dB)

  • signal/noise ratio: 86dB (A weighted)

  • input sensitivity: 40mV / 150Kohm

  • overload and short-circuit protected

  • supply voltage: 15V DC (8 to 18V DC possible) / 0.5A

  • dimensions: 2.2" x 1.4"

Price: $16.60


 

2 X 30W AUDIO POWER AMPLIFIER-K4003

This small amplifier is constructed with the TDA2616 IC, with a maximum supply capability of 2 x 15Wrms (4ohm) of 2 x 10Wrms (8ohm). The IC is thermally and short-circuit protected. Additional rectifier and smoothing filter are unnecessary, as alternating current can be directly connected to the unit.

Specifications

  • music power output: 2 x 30W / 4ohm

  • RMS output: 2 x 15Wrms / 4ohm or 2 x 10Wrms / 8ohm

  • total harmonic distortion: 0.07% (1W / 1kHz)

  • channel separation: 70dB

  • frequency response: 7Hz to 60kHz (-3dB)

  • signal-to-noise ratio: 98dB (A weighted)

  • input sensitivity: 300mV / 150Kohm

  • transient suppression on/off switch

  • overload and short-circuit protection: max. 1h

  • supply voltage: 2 x 12V AC / 2A (50W transfo recommended)

  • dimensions: 2.8" x 2.0"

Price: $36.40


 

 

 

200W MONO / STEREO AMPLIFIER-K4004B

Price: $112.28


 

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. Speaker transient suppression.

Specifications

  • rms output power: 2 x 50W / 4ohm ; 2 x 40W / 8ohm

  • rms mono-bridged power: 100W / 8ohm

  • total music output: 200W

  • harmonic distortion: 0.01% at 1kHz

  • signal-to-noise ratio: 102dB (A weighted)

  • stereo channel separation: 85dB

  • damping factor (at 100Hz): > 1000

  • input impedance: 22Kohm

  • input sensitivity: 300mV, 550mV or 1V switchable

  • thermal protection: max. 1h

  • short-circuit and overload protection: max. 10 sec.

  • power supply: + 28V DC and - 28V DC max.

  • consumption (2 x 4ohm or mono-bridge 8ohm): 4A max.

  • consumption (2 x 8ohm): 2.5A max.

  • dimensions: 8.3" x 3.4" x 2.5"

400W MONO / STEREO AMPLIFIER-K4005B

 $156.00


 

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 optional thermal protection. Speaker transient suppression.

Specifications

  • rms output power: 2 x 100W / 4ohm ; 2 x 75W / 8ohm

  • rms mono-bridged power: 200W / 8ohm

  • total music output: 400W

  • harmonic distortion: 0.003% at 1kHz

  • signal-to-noise ratio: 96dB (A-weighted)

  • stereo channel separation: 76dB

  • damping factor (at 100Hz): > 2000

  • input impedance: 22kohm

  • input sensitivity: 150mV, 300mV or 950mV switchable

  • supply voltage for 8 ohm: + 35 to 40 VDC and - 35 to 44V DC / 2.5A

  • supply voltage for 4 ohm or mono: + 25 to 30V DC and - 25 to 30V DC / 5A

  • dimensions: 13.8" x 2.5" x 3.4"





 


 

 

 

 

Marshall  18W  Tube Amplifiers Kit

With assembly manual, easy and clear to assemble

 



 $349.00

STEREO TUBE AMPLIFIER / CHROME VERSION-K4040




For most of us a high power tube amplifier is unaffordable. This kit changes that, so that now everybody can enjoy that sublime "tube sound". The sound of tubes has never been surpassed, nor by transistors, nor by FETs. In the course of developing this amplifier, special attention was given to the housing so that the expensive tubes are on display in a way that is very pleasing to the eye. The weakest point of an tube amplifier are the output transformers ; that's the reason why we use ultra-linear and over-rated output transformers (toroidal) to guarantee a rich bass response. To extend the life of the precious valves, the amplifier is provided with an switch on delay, so that the high voltage is switched on when the tubes are warmed up.

Features

  • pure valve sound with high quality EL34 tubes

  • high quality black and chrome housing

  • chrome valve socket covers

  • easy bias adjustment with LED indication

  • removable bottom for easy access and service

  • high quality capacitors and components

  • gold plated input and speaker terminals

  • standby function

  • "Soft start" circuit for power transformer

Specifications

  • output power: 2 x 90Wrms music power for loads of 4 or 8 ohm

  • power bandwidth: 15Hz - 40kHz (-3dB ref. 50W)

  • frequency range: 8Hz - 80kHz (-3dB ref. 1W)

  • harmonic distortion: 0.08% (1kHz / 1W) / 0.7% (1kHz / 90W)

  • signal-to-noise ratio: > 105dB (A-weighted ref. 90W)

  • channel separation: >75dB (ref. 90W)

  • input impedance: 34Kohm

  • input sensitivity: 1Vrms at 95W

  • damping factor: >10 (100Hz)

  • weight: 37.5lb

  • dimensions: 16.7" x 5.1" x 13.8"

 Price: $1821.00

DIGITALLY CONTROLLED PREAMPLIFIER-K4100

Price: $483.75


 

A pre-amplifier is an indispensable device for controlling a power amplifier. When developing this pre-amplifier we opted for DIGITAL control of all functions, so that it contains no potentiometers at all ! All functions, such as volume, tone control, balance and input selection can be operated using push buttons and a LED display gives a clear indication of all settings. All functions may be operated with a remote control unit

Specifications

  • input sensitivity:

    • PHONO: 5.5mV / 50Kohm

    • CD: 500mV / 32Kohm

    • TUNER, TAPE1 & 2: 360mV / 22Kohm

  • output level:

    • LINE: 1V

  • signal-to-noise ratio (A weighted):

    • PHONO: 75dB

    • TAPE, CD, TUNER: 100dB

  • total harmonic distortion: 0.01%

  • frequency response: 8Hz - 150kHz (-3dB)

  • channel separation: 90dB

  • cross talk: -99dB

  • headphones output: 280mW / 32ohm

  • mains output: 5A

  • consumption: 6W max.

  • dimensions: 16.7" x 2.0" x 13.8"

  • weight: 11lb

GUITAR HEADPHONE AND PREAMPLIFIER-K4102

An electric guitar cannot be connected to just any amplifier or audio installation. This pre-amplifier has been designed for this purpose and provides you with a headphone output, allowing you to practice without disturbing others. Moreover, it is fitted with a special device for tone adjustment, allowing anyone to create their personal sound.

Specifications

  • sound adjustment

  • adjustable input sensitivity

  • low noise

  • headphones output: max. 2 x 50mW / 32ohm

  • housing included

  • power supply: 9V battery (not incl.)

  • dimensions: 2.8" x 1.2" x 4.1"

Price: $39.00

MONO 65W PURE CLASS A TUBE POWER AMPLIFIER WITH KT88 TUBES-K8010


Price: $1378.95

Plenty of power, deep bass and low distortion, yet still affordable. This single channel tube amp delivers up to 65W of pure class A power, due to its KT88 output penthodes. A attractive chrome plated enclosure has been designed, to match this state-of-the-art design. It comes complete with chrome plated tube base cover rings and heavy duty cabinet feet.

Features

  • 4 quality KT88 tubes in push-pull combination

  • gold plated heavy duty speaker and RCA connectors

  • easy bias adjustment with LED readout

  • standby mode stretches tube life

  • soft start circuit prevents mains fuse tripping at power-up

  • no-compromise quality components

  • custom made oversized toroid output and power transformers

  • one single PCB ensures hassle free assembly and wiring

  • removable cabinet bottom for hassle free servicing

Specifications

  • tubes: 4 x KT88, 1 x ECC81, 1 x ECC82

  • output power: 65Wrms class A in 4 or 8ohm

  • bandwidth: 8Hz to 80kHz (-3dB/1W)

  • harmonic distortion: 0,1% at 1W/1kHz

  • signal/noise ratio: >110dB (A-weighted)

  • input sensitivity: 1V rms minimum (adjustable)

  • supply voltage: 100, 120, 230 or 245V AC

  • max. power consumption: 300VA

  • dimensions: 14.2" x 14.2" x 6.3"

 

MONO 90Wrms TUBE POWER AMPLIFIER MODULE-K8011

Price: $717.00


 

Upgrade your guitar amp, jukebox or construct your own audio system with this superb tube amplifier module. Plenty of power, very low distortion, excellent bass response, this amp will satisfy even the most critical listener. It comes complete with PCB, toroidal custom made power and output transformers, all necessary tubes and an extensive manual.

Features

  • 4 quality EL34 tubes in push-pull combination

  • easy bias adjustment with LED readout

  • standby mode stretches tube life

  • soft start circuit prevents mains fuse tripping at power-up

  • no-compromise quality components

  • custom made oversized toroid output and power transformers

  • one single PCB ensures hassle free assembly and wiring

Specifications

  • tubes: 4 x EL34, 1 x ECC81, 1x ECC82

  • output power: 90Wrms at 4 or 8ohm

  • bandwidth: 2Hz to 125kHz (-3dB/1W)

  • harmonic distortion: 0,1% at 1W/1kHz

  • signal/noise ratio: 104dB (A-weighted)

  • input sensitivity: 1Vrms minimum (adjustable)

  • stand-by power consumption: 60W

  • max. power consumption: 230W

  • assembled module dimensions: 12.6" x 13.6" x 5.0"

TUBE CONTROL AMPLIFIER-K8020



Features

  • no compromise high-end design

  • 4 inputs

  • exclusive, high finish, solid aluminum enclosure

  • high quality ALPS volume potentiometer

  • full tube design

  • auto muting (warm up) at power on

  • highly reliable reed relay input selection

  • separate left and right input section

  • programmable level adjustment: +6dB for each input

  • regulated DC filament supply

  • output mute function

  • switchable monitor output (for tape, CDR, MD,...)

Specifications

  • input sensitivity for 0dB (0.775Vrms) out: approx. 200mV / 50Kohm

  • maximum output level: 35Vpp

  • output load impedance: 10K or higher

  • signal to noise ratio (A-weighted ref. 0dB out): 100dB

  • total harmonic distortion: <0.04% @1kHz / 47K load

  • gain: x2 or x4(+ 6dB on)

  • frequency response:

    • 7Hz to 150kHz (-3dB) @ x2 gain

    • 18Hz to 55kHz within 0.3dB

  • channel separation: 85dB @ 0dB in

  • input cross talk: < -100dB @ 0dB in

  • AC power: 115V AC (100V to 120V)

  • consumption: 16W max.

  • dimensions: 11.4" x 6.5" x 2.7"

  • weight (net): 6lb

Price: $478.65


 

HIGH-END CONTROL AMPLIFIER-K8021


Price: $ 306.30


 

Features

  • no compromise high-end design

  • 4 inputs

  • exclusive, high finish, solid aluminum enclosure

  • high quality ALPS volume potentiometer

  • audio grade selected op-amps

  • capacitor-less output coupling

  • highly reliable reed relay input selection

  • separate left and right input section

  • programmable level adjustment: +6dB for each input

  • headphones output

  • output mute function (except phones)

  • phono RIAA input section

  • phono input can be configured as line input

  • switchable monitor output (for tape, CDR, MD,...)

Specifications

  • input sensitivity for 0dB (0.775Vrms) out:

    • PHONO: 3mV / 47Kohm

    • LINE: 200mV / 50Kohm

  • maximum output level: 26Vpp

  • signal to noise ratio (A-weighted ref. 0dB out):

    • LINE: >105dB

    • PHONO: 83dB

  • total harmonic distortion: 0.003% @1kHz

  • gain: x2 or x4 (+ 6dB on)

  • frequency response:

    • 4Hz to 500kHz (-3dB) @ x2 gain

    • 10Hz to 100kHz within 0.3dB

  • channel separation: 90dB @ 0dB in

  • input cross talk: < -100dB @ 0dB in

  • headphones output: 250mW max. @ 32ohms

  • AC power: 115V AC (100V to 120V) or 230V AC (220V to 240V)

  • consumption: 6W max.

  • dimensions: 11.4" x 6.5" x 2.7"

  • weight (net): 4.8Lbs

 

INTEGRATED MONO MOSFET AMPLIFIER-K8040


Features

  • no compromise high-end design

  • ideal to place next to the speaker (short wires to the speaker)

  • auto-power on possibility when input signal is sensed

  • auto-standby function when no input signal is sensed

  • exclusive, high finish, solid aluminum enclosure

  • high quality D-MOS IC output stage

  • total of 40.000F power supply capacitors

  • relay-less speaker DC protection

  • Real Clipping distortion indication

  • power output level indication with backlight

  • bypass output to drive bi-wired speakers using separate amplifiers

  • double overheating protection with LED indication

  • high grade speaker and input connections

  • overload protection

Specifications

  • input:

    • input sensitivity for maximum output: 0dBm (= 0.775Vrms)

    • input impedance: 15Kohm

    • minimum auto switch on voltage: 5mVrms

  • output:

    • maximum RMS output power 4ohm: 90W

    • maximum RMS output power 8ohm: 70W

    • dynamic RMS output power in 4ohm: 125W

    • minimum load impedance: 4 ohm

    • damping factor (ref. 8ohm 100Hz): > 1000

  • audio:

    • signal-to-noise ratio (A-weighted ref. max. out): >105dB

    • total harmonic distortion: 0.003% @ 1kHz ref 1W

    • frequency response: 9Hz to 120kHz (-3dB) in 50W

  • power requirements:

    • AC power: 115V AC (110V to 120V) or 230V AC (220V to 240V)

    • consumption: 100W max.

  • dimensions: 11.4" x 6.5" x 2.7"

  • weight (net): 7.5 Lbs

Price: $333.75

Back to Kit Index