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Audio Pre/Power Amplifiers

How to understand Watt?

How to understand Watt?

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Preamplifier

A preamplifier to use with an electret or other microphone to boost the signal before feeding into an amplifier. Simple and easy to build. PCB Size: 1.75" x 1.25". Power supply: 6 to 12VDC (Electret microphone Included)

Quantity	Price
1 – 9	$13.68
10 – 99	$12.96
100 +	$11.88

Skill Level of Item:		Kit - Basic Soldering Required
Product #		CPS98
Quantity Available:		27

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UNIVERSAL MONO PRE-AMPLIFIER (Out of Stock)

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" options for power supply: K1823 (K1803)

Quantity	Price
1 – 9	$11.54
10 – 99	$10.94
100 +	$9.99

Skill Level of Item:		Kit - Basic Soldering Required
Product #		K1803
Quantity Available:		0

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UNIVERSAL 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"
recommended transformer: K1823

(K2572)

Quantity	Price
1 – 9	$17.01
10 – 99	$16.09
100 +	$14.75

Skill Level of Item:		Kit - Basic Soldering Required
Product #		K2572
Quantity Available:		9

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STEREO RIAA PRE-AMPLIFIER

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"
recommended transformer: K1823

Quantity	Price
1 – 9	$16.42
10 – 99	$15.55
100 +	$14.26

Skill Level of Item:		Kit - Basic Soldering Required
Product #		K2573
Quantity Available:		4

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Stereo Preamplifier - Tone Control Unit

This is a preamplifier and tone control unit
which will make a useful addition to any
of our power amplifier kits. It is extremely
easy to construct due to the use of a special IC,
the Philips TDA 1524A. This contains all the
circuitry required to provide up to 20 dB of
voltage gain, +/-15 dB of bass and treble
control, channel balance, and a switchable
loudness contour.
(CPS100)

Quantity	Price
1 – 9	$28.10
10 – 99	$26.10
100 +	$25.23

Skill Level of Item:		Kit - Basic Soldering Required
Product #		CPS100
Quantity Available:		12

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VOLUME AND TONE CONTROL - PREAMPLIFIER

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

Quantity	Price
1 – 9	$29.65
10 – 99	$27.54
100 +	$26.62

Skill Level of Item:		Kit - Basic Soldering Required
Product #		K8084
Quantity Available:		1

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SUPER STEREO EAR KIT (Out of Stock)

Stereo audio amplifier boosts sound 50 times. Great for the-hearing impaired (e.g. when watching TV), as a gadget, science project, … With volume control and on/off switch.

Specifications:

power supply: 3 1.5V AA battery (not included)
dimensions: 2.4" x 2.1" x 1.7"
(MK136)

Quantity	Price
1 – 9	$8.39
10 – 99	$7.95
100 – 999	$7.72
1000 +	$6.89

Skill Level of Item:		Kit - Basic Soldering Required
Product #		MK136
Quantity Available:		0

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TELEPHONE AMPLIFIER

This telephone amplifier may be used as a free-standing amplifier with speaker, e.g. to listen to a telephone conversation, or the output may be connected to an amplifier or mixing panel (e.g. radio stations).

Specifications:

input: isolation transformer interface
speaker output: 0.5W / 8ohm
line output: 0dB (0.775Vrms)
power supply: 7 - 9V AC or 9 - 12V DC / 150mA
PCB dimensions: 2.5" x 2.1"
recommended housing: G416
recommended transformer: -
recommended adapter:

(K4900)

Quantity	Price
1 – 9	$15.73
10 – 99	$14.89
100 +	$13.66

Skill Level of Item:		Kit - Basic Soldering Required
Product #		K4900
Quantity Available:		2

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1W Stereo Audio Amp Module KA2209 (ver 2

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. 2-9 volt operation. (CPS87) (version 2)

Quantity	Price
1 – 9	$15.96
10 – 99	$15.12
100 +	$13.86

Skill Level of Item:		Kit - Basic Soldering Required
Product #		CPS87
Quantity Available:		13

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audio amplifier 1W (LM386) kit

A kit module designed to be used as a building block in a larger project. The semiconductor LM386 is a general purpose power amplifier designed for use in low voltage applications. Gain may be set between 20 and 200. LM386 data sheet included. Supply voltage: 4 to 12V(CPS17)
PCB size: 1.5in x 1.25in (38mm x 31mm)

Quantity	Price
1 – 9	$13.68
10 – 99	$12.96
100 +	$11.88

Skill Level of Item:		Kit - Basic Soldering Required
Product #		CPS17
Quantity Available:		9

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TDA7052 Amplifier Module 1W

A 1W power amplifier building block designed to be part of a larger project. Ideal as a low power battery operated amplifier (from 3 to 15V) driving an 8 ohm speaker. The Philips TDA7052 is a general purpose amplifier. No heatsink needed. Short circuit protected. PCB size: 1.2" x 1.2" (30mm x 30mm)

Quantity	Price
1 – 9	$13.68
10 – 99	$12.96
100 +	$11.88

Skill Level of Item:		Kit - Basic Soldering Required
Product #		CPS27
Quantity Available:		114

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PCB only of the K27 (CPS27)

This is the PCB only of the CPS27 / K27 (TDA7052 Amplifier Module 1W)

Quantity	Price
1 – 9	$11.97
10 – 99	$11.34
100 +	$10.40

Skill Level of Item:		Component or Part
Product #		BB268
Quantity Available:		7

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1W Stereo Amplifier Module DC Volume con

This is a 1 watt stereo amplifier module Kit using the TDA 7053A from Philips. It uses a DC voltage to control gain, hence a single gang pot or switch can be used as a volume control with minimal tracking error. It will operate from 4.5 – 18 V DC and requires no heat-sink for normal use. TPCB size 1 1/2"x1 3/4" (CPS139)

Quantity	Price
1 – 9	$13.68
10 – 99	$12.96
100 +	$11.88

Skill Level of Item:		Kit - Basic Soldering Required
Product #		CPS139
Quantity Available:		39

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1W Stereo Amplifier Module

Uses 2 LM386N-1 for a stereo amplifier. Ideal for walkman and other battery powered items. 4V - 12V DC. Instructions PCB and components supplied.

This is a 1 watt per channel, stereo amplifier module Kit using two LM386N IC’s from National Semiconductor. It is basically two of our CPS17’s on a single PC board, with a dual gang pot. It will operate best from 6-12V DC and will work well from a battery since the quiescent current drain is only 10 mA. It requires no heat sinks for normal use. The input and output are both ground referenced. Maximum output will be obtained with a 12V power supply and 8 ohm speaker, however it is particularly suitable for driving headphones from a supply as low as 4V. Speakers are not supplied. They should be rated at 3W or over. PCB size 63mm x 40mm (2.5" x 1.5"). (CPS115)

Quantity	Price
1 – 9	$14.82
10 – 99	$14.04
100 +	$12.87

Skill Level of Item:		Kit - Basic Soldering Required
Product #		CPS115
Quantity Available:		20

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2W amplifier module LM380

This is a very simple amplifier built around the LM380 IC. It can deliver up to 2W into an 8 ohm speaker depending on the supply voltage. Instead of using a heatsink or heat fins the heat produced is dissipated through the center pins of the IC into the copper overlay left on the PCB. If you do require a sustained output of more than ½ watt, you will need to add a heatsink (not included). The IC solders directly to the PCB.
PCB size: 1.75in x 1.75in (45mm x 45mm)

Power output:
> 2 Watt max. (4-8 ohms, 20V)
> 1 Watt max. (4-8 ohms, 12V)
> 0.5 Watt RMS continuous

Quantity	Price
1 – 9	$14.25
10 – 99	$13.50
100 +	$12.38

Skill Level of Item:		Kit - Basic Soldering Required
Product #		CPS97
Quantity Available:		10

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3W Mono Amplifier

CLOSEOUT ITEM - WHILE STOCK LASTS.

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, etc.

Features:

compact size
low part count
no additional heatsink required
single supply
wide supply range
excellent protection

Quantity	Price
1 – 9	$14.36
10 – 99	$13.59
100 +	$12.47

Skill Level of Item:		Kit - Basic Soldering Required
Product #		K8066
Quantity Available:		12

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3W Stereo Amplifier Module BA5406

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. PCB size: 67mm x 38mm. (2.6" x 1.5") Requires heatsink (supplied.)(CPS90)

Quantity	Price
1 – 9	$19.38
10 – 99	$18.36
100 +	$16.83

Skill Level of Item:		Kit - Basic Soldering Required
Product #		CPS90
Quantity Available:		22

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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. Terminal strips are used for inputs and outputs. Use two 9 volt batteries. PCB Size: 2in (L) X 1.5in (W) (CPS48)

Quantity	Price
1 – 9	$17.10
10 – 99	$16.20
100 +	$14.85

Skill Level of Item:		Kit - Basic Soldering Required
Product #		CPS48
Quantity Available:		16

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2X5W AMPLIFIER FOR MP3 PLAYER

Features:

big sound from a small unit
low distortion
input: stereo 3.5mm jack
volume adjust complete with attractive knob
slide on/off switch
blue indicator led

Quantity	Price
1 – 9	$16.99
10 – 99	$16.12
100 +	$14.78

Skill Level of Item:		Kit - Basic Soldering Required
Product #		MK190
Quantity Available:		7

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7W MONO AUDIO AMPLIFIER- kit

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.
(K4001)

Quantity	Price
1 – 9	$15.29
10 – 99	$14.49
100 +	$13.29

Skill Level of Item:		Kit - Basic Soldering Required
Product #		K4001
Quantity Available:		4

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ASSEMBLED 7W AMPLIFIER

NEW - LOWER PRICE!
Price was: ~~$16.88~~

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. Features also available in kit version: K4001 Specifications music power output: 7W / 4ohm output: 3.5Wrms / 4ohm or 2Wrms / 8ohm total harmonic distortion: 0.05% (1W / 1kHz) frequency response: 20Hz to 20kHz (-3dB) signal-to-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" (VM114)

Quantity	Price
1 – 9	$15.92
10 – 99	$14.78
100 +	$14.29

Skill Level of Item:		Assembled and Tested
Product #		VM114
Quantity Available:		7

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6 - 10W Stereo Ampl Mod using TDA2005

Kit 143 is a class AB stereo audio power
amplifier designed for quality hi-fi
applications using a TDA2005 module. It is
easy to construct and has a minimum of
external components. The module has output
current protection and thermal protection. This
is the data book circuit which produces an
excellent sound. The supply voltage required
for this kit is 8 - 18V DC at 1 to 2 Amps.

PCB size 3"x1 3/4"(CPS143)

Quantity	Price
1 – 9	$21.66
10 – 99	$20.52
100 +	$18.81

Skill Level of Item:		Kit - Basic Soldering Required
Product #		CPS143
Quantity Available:		11

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10W Stereo amplifier module TDA2009A

The TDA2009 is a class AB dual hi-fi audio amplifier IC designed for quality stereo applications. This is a 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. PCB size: 3.58" x 1.81".
(CPS88)

Quantity	Price
1 – 9	$21.66
10 – 99	$20.52
100 +	$18.81

Skill Level of Item:		Kit - Basic Soldering Required
Product #		CPS88
Quantity Available:		22

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TDA2002 / TDA2003 Amplifier Module kit

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 for the LM383. (CPS47)

Quantity	Price
1 – 9	$19.38
10 – 99	$18.36
100 +	$16.83

Skill Level of Item:		Kit - Basic Soldering Required
Product #		CPS47
Quantity Available:		23

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PCB only of the K47 (CPS47)

This is the PCB only of the CPS47 / K47 (TDA2002 / TDA2003 Amplifier Module kit)

Quantity	Price
1 – 9	$5.70
10 – 99	$5.40
100 +	$4.95

Skill Level of Item:		Component or Part
Product #		BB287
Quantity Available:		10

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18W BTL Audio Power Amplifier

This kit contains the essential components to build a low voltage, high power mono 18W Bridge Tied Load (BTL) amplifier module using the Hitachi HA13118. The circuit is straight out of the data sheet. Only a few external passive components are required to make the module. The IC contains surge protection circuits and thermal shutdown circuits. The speaker and cables are not included. (CPS105)

Quantity	Price
1 – 9	$20.52
10 – 99	$19.44
100 +	$17.82

Skill Level of Item:		Kit - Basic Soldering Required
Product #		CPS105
Quantity Available:		7

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HA13118 18 W BTL Audio Power Amplifier Power IC

The HA13118 is power IC designed for component car stereo amplifiers. At 13.2 V to 4 Ω load, this power IC provides an output power of 18W with 10% distortion.

It is easy to design as this IC employs internal each protection circuit and the new small package.

(BB238)

Quantity	Price
1 – 9	$6.84
10 – 99	$6.48
100 +	$5.94

Skill Level of Item:		Component or Part
Product #		BB238
Quantity Available:		3

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25W amplifier module LM1875

Kit contains the essential components to build a HiFi amp module using the LM1875 IC. See the documentation for full specifications. Heatsink, speakers and cables are to be supplied by the user.

This kit contains the essential components needed to build a high fidelity amplifier module using the National Semiconductor LM1875 IC. With the addition of a handful of parts and a suitable power supply, this module will deliver 25W RMS into 8 ohms @ 1% THD. PCB dimensions are a tiny 53 x 50mm (2.1” x 2”). Heatsink, power transformer, speaker and cables are not included.(CPS50)

Quantity	Price
1 – 9	$19.38
10 – 99	$18.36
100 +	$16.83

Skill Level of Item:		Kit - Basic Soldering Required
Product #		CPS50
Quantity Available:		7

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CPS50/K50 PCB only

(BB098)

Quantity	Price
1 – 9	$7.41
10 – 99	$6.99
100 +	$6.44

Skill Level of Item:		Component or Part
Product #		BB098
Quantity Available:		11

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50W amplifier module TDA7294

The heart of this amplifier module is a monolithic integrated circuit from SGS-Thomson, TDA7294. It is intended for use as an audio class AB amplifier in hi-fi applications. Kit includes the TDA7294 IC. It has a wide voltage range and output current capability, enabling it to supply the highest power into both 4 Ohm and 8 Ohm loads. With the addition of a handful of parts and a suitable power supply, this module will deliver > 50W RMS into 8 Ohm @ 0.1% THD. HEATSINK NOT INCLUDED. User must supply a heatsink rated at 1.4 deg C/W.

Specifications:

(± 35V D.C. power supply)
Output power : > 50W RMS, 4-8 Ω load
~ 80W into 4Ω max.
~ 60W into 8Ω max.
Gain: 24 dB (30dB modification)
Input sensitivity : 1.3V for 50W, 8 ohm
0.9V for 50W, 4 ohm
(0.6V, 50W, 8Ω, G=30dB)
Input impedance : 10kΩ
Signal-to-Noise ratio : > 95 dB, (>105 dBA)
Frequency response : ~ 20Hz - 200kHz, –3 dB
Slew rate : > 10V/uS
THD : < 0.01%, 1W-40W,1kHz
< 0.1%, at 50W, 20-20kHz
IMD : < 0.01%, 1W (CPS106)

Quantity	Price
1 – 9	$34.88
10 – 99	$32.40
100 +	$31.32

Skill Level of Item:		Kit - Basic Soldering Required
Product #		CPS106
Quantity Available:		7

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2 X 30W AUDIO POWER AMPLIFIER

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. 8835/40 heat sink comes included.

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"

Quantity	Price
1 – 9	$26.45
10 – 99	$24.57
100 +	$23.75

Skill Level of Item:		Kit - Basic Soldering Required
Product #		K4003
Quantity Available:		2

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8835/40 HEAT SINK WITH SPECIAL DRILL FOR K4003

Specifications:
Dimensions 1 37/64" x 3 5/32"

Quantity	Price
1 – 9	$9.29
10 – 99	$8.83
100 +	$8.09

Skill Level of Item:		Component or Part
Product #		HS4003
Quantity Available:		3

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ANTI SPEAKER PLOP FOR K3503 CAR AUDIO AMPLIFIER

Closeout item. Limited Quantity Available.
Prevent any annoying plop occurring in speakers when switching the K3503 car booster on and off. In addition, it provides protection for the MOSFET transistors and the car battery (monitoring the voltage drop). The entire circuit can be built into the car booster housing.
(K3506)

Price: $13.95

Skill Level of Item:		Kit - Basic Soldering Required
Product #		K3506
Quantity Available:		3

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DISCRETE POWER AMPLIFIER 200W (kit)

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 sub-woofer, guitar amp, home theatre systems, instrument amp, etc.
comes complete with transistor isolators, spacers and bolts overload and short-circuit protection
OPTIONAL HEATSINK REQUIRED: HSVM100

Quantity	Price
1 – 9	$27.76
10 – 99	$25.76
100 +	$24.93

Skill Level of Item:		Kit - Complex Soldering Required
Product #		K8060
Quantity Available:		5

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HEATSINK FOR K8060

Specifications:

Pre-drilled holes for K8060
Dimensions: 75 x 175 x 28mm (approx.)
(HEAT SINK ONLY)

Quantity	Price
1 – 9	$24.95
10 – 99	$22.95
100 +	$21.95

Skill Level of Item:		Component or Part
Product #		HSVM100
Quantity Available:		2

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200W POWER AMPLIFIER MODULE (Assembled)

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 fully adjusted and tested
overload and short-circuit protection

(HSVM100 heatsink is included)

Quantity	Price
1 – 9	$79.89
10 – 99	$75.47
100 +	$72.95

Skill Level of Item:		Assembled and Tested
Product #		VM100
Quantity Available:		2

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200W MONO / STEREO AMPLIFIER

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.
(K4004B)

Quantity	Price
1 – 9	$101.45
10 – 99	$94.23
100 +	$91.09

Skill Level of Item:		Kit - Basic Soldering Required
Product #		K4004B
Quantity Available:		2

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STEREO TUBE AMPLIFIER / CHROME VERSION (Out of Stock)

Please note: This item is not carried ex-stock in our warehouse. This item will ship to you around 1 week after you submit your order.

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.
(K4040)

Quantity	Price
1 – 9	$1,434.22
10 – 99	$1,409.06
100 +	$1,358.73

Skill Level of Item:		Kit - Complex Soldering Required
Product #		K4040
Quantity Available:		0

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GUITAR HEADPHONE AND PREAMPLIFIER

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.
(K4102)

Quantity	Price
1 – 9	$30.96
10 – 99	$28.76
100 +	$27.80

Skill Level of Item:		Kit - Basic Soldering Required
Product #		K4102
Quantity Available:		3

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