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Audio
Simple version. Full version located here
http://kazus.info/indexs/list_pages_categories/2/0/0.html
55W (Originally 75W) Power Amplifier
Sony (models: D-190, D-191, D-191SR, D-192CK, D-193) schematics
Sony CFS-B7SMK2 schematics
LG FFH-150 schematics
Sound Blaster Preamp - Fixes that well known problem and needs no batteries
Tape Head Demagnetizer Cassettes - Demagnetizer cassettes contain a battery powerd circuit
Dynamic Microphone Preamp - These are often found inside old 2way radio microphones
Audio Graphic Equaliser
Simple Surround Sound Decoder
Tone Control
Reverse RIAA Equaliser
Expandable Graphic Equaliser
Hi-Fi Preamplifier
Audio preamplifier circuits
Updated 60-100W Hi-Fi Power Amplifier
DPA 880 schematic
DPA 440 schematic
DPA 220 schematic
300W Subwoofer Power Amplifier
55W (Originally 75W) Power Amplifier
50 Watt Amplifier
25 Watt MosFet Audio Amplifier
Stereo Radio Cassette Recorder 350K
Stereo Radio Cassette Recorder CFS-W 430L
Stereo Radio Cassette Recorder ICF-C26 / ICF-C26A
Stereo Radio Cassette Recorder GF9090/GF9090X
Stereo Radio Cassette Recorder SH760
Stereo Radio Cassette Recorder SH202
Stereo Radio Cassette Recorder EK560
Stereo Radio Cassette Recorder EK460
Stereo Radio Cassette Recorder EK205
Stereo Radio Cassette Recorder EK105
Stereo Radio Cassette Recorder EC710K
Stereo Radio Cassette Recorder AT490
Stereo Radio Cassette Recorder AM1006
Stereo Radio Cassette Recorder AM1004
RIC. Power Amp, Preamp.
Rane. Real-Time spectrum analyzer, Compressor, Swiss army mixer, Active crossover, Crossover, Graphic equalizer, Headphone controller, Microphone amplifier, Microphone equalizer, Mixer.
Outline. SHD 5000
Marshall. JCM 2000 Super Lead Standard, JCM 900, JCM 800.
Ibanez. Sonic Distortion
Hughes & Kettner. Guitar Amps: Tube Factor, Tube Man II, Redbox Pro, Club Reverb, Tour Reverb. Bass Amps: Bass Force L.
Gibson. GA-15, 20, 25, 30b
Fender. Bandmaster mod., Bandmaster reverb mod., Bassman mod., 75w lead amp with reverb, Frontman reverb: schematic, layout
Epiphone. Electar Tube 10, 30.
Electro-Harmonix. Soul Preacher
DOD. 525 Compressor limiter. Death Metal
Crest. LT/ST Switching amplifier
Boss. Heavy Metal HM-2, Metalzone
Ampeq. Scrambler schematic, pcb, layout
2000 W - POWER AMPLIFIER
300W - MOS power amp
DC/DC - SMPS
70W-power amp (2)
QUAD - 405. QUAD power amplifier
QUAD - 34. QUAD power amplifier
QUAD - 306. QUAD power amplifier
70W-power amp
94W-power amp
150W-power amp
90W-power amp
200W-power amp
240W-power amp
265W-power amp
350W-power amp
400W-power amp
300W-power amp
Sound filters 45-90Hz
Dekoder-Subwoofer
Soft start for PA
200W - Power amp
300W - Subwoofer
600W - Power amp
HI-FI sistem (BG)
Sound control, volume, balance, treble and bass.
VU Meter 5 with UAA180
Mini audio spectrum analyzer
VU Meter 4 with LM3915 [10 Led] for Power Amp.
VU Meter 3 with LM3915 [10 Led]
VU Meter 2 with LM3915-LM3916 [19 Led]
VU Meter 1 with transistor. It is a simple circuit of optical index of level of sound signals, adapted in various needs of user.
Audio Peak Indicator
Tube power amplifier 8W with EL84
Tube Power amplifier 3W with 6BX7
Tube Power Amplifier Dynaco ST-70 with 2xEL34
Tube Power Amplifier 35W with EL34
The Audio Note Conquest 300B parallel single ended power amplifier
Tube Line Preamplifier Progect 1
Three Tube PHONO (RIAA) Preamplifiers with ECC83
Hampton Tube Preamplifier for moving coil pick-up cambrige with ECC88
Headphone amplifier in Class A [2]
Mini power amplifier for headphone in Class A
Headphone amplifier with TDA2004
Graphic Equalizer 10 Band [B]
Graphic Equalizer 10 Band [A]
Graphic Equalizer 6 Band
Graphic Equalizer 5 Band with tranzistor.
Graphic Equalizer 3 Band
Equalizer with Parametric Mid
PLL Stereo Decoder with LM1800 [4]
Stereo Multiplex Decoder with CA3090Q [2]
Multiplex decoder with TDA1578 [1]
Stereo Audio mini MIXER MIC-LINE for PC Audio Card
Bridge (Stereo to Mono), Power amplifier converter with electonic Balance input
DC Protection and Delay time for P.Amp. - Loudspeaker 1
Collection of little Bridge Power Amplifier
Power amplifier 12W with MOS FET transistor
Power Amplifier with STK40xx series module IC
Electrocompaniet - The 2 Channel Audio Power Amplifier
Power Amplifier 100W with V-MOSFET transistor [1]
HAFLER DH-200 - Power amplifier 100W with V-MOSFET
High Power amplifier 300W
Power Amplifier 60W / 8 Class AB
Power Amplifier 40W Class A By Nelson Pass
Power Amplifier 60W Class A
High Power amplifier 170W in 8 ohms
Protection 2 for Power Amplifier and Loudspeakers
Power amplifier for Loudspeaker 6.5W 8R
Power amplifier 2X5W in 4ohms with TDA1516Q
Power amplifier 2X18W in 4ohms with TDA1516Q
Power amplifier 35W with LM391
Power amplifier 45W with HEXFET
Power amplifier 60W /8ohm Class AB
Power amplifier 65W with HEXFET
Power amplifier 30W
2-Way Active Loudspeaker
3-Way Active Loudspeaker
Electronic Balance Input to Electronic Balance output
Electronic 3 Way Crossover -24dB/oct.
Auto Fade for Audio signals
Speetch filter- Band pass (300HZ to 3KHZ)
Module 1 Line amplifier in Class A
Audio Peak Indicator (overload)
Electronic Balance input with Gain and Volume
Mic-Line electronic balance input, with Gain -filter
Symmetrical class A Line amplifier 2
Symmetrical class A Line amplifier 1
Class A Buffer preamplifier module
Class A preamplifier module with IC
Remove common signal from Stereo sound
Audio modular MIXER with 6 and up channel
Variable High-Pass 20HZ to 200HZ Filter
Stereo Preamplifier with elect. adjustment Volume-Balance-Treble-Bass
Audio Preamplifier with Digital Volume
Surround Sound Decoder
Hi-Fi RIAA Phono Preamplifier for moving magnet cartridge. Part 2
Hi-Fi RIAA Phono Preamplifier for moving magnet cartridge. Part 1
Moving Coil Head pre-preamlifier
Audio SONY: A490, HCD_H450
Tubesaurus Rex, J.C.Morrison
Single-Ended vs Push-Pull. (Scott Francland) part 2
Single-Ended vs Push-Pull. (Scott Francland) part 1
Life in a Vacuum. (EL34, RB300)
TDA8199 ( Volume, Stereo )
TDA8196 ( Volume, Selector, Mono )
M51523L ( Volume, Balance, Stereo )
M51133P ( Volume, Balance, Stereo )
LA1362 ( Volume, Mono )
Silver Crown RX-22 (50 Kb) tapre recorder
Technics RS-AZ7 Schematics
Technics RS-AZ6 Schematics
Technics RS-TR575 Schematics
Technics RS-TR474 Schematics
Technics RS-TR373 Schematics
Amplifier TL 25+ (lamp)
Amplifier SDS EL84
Amplifier RCA 6082
Amplifier Rickenbacker M11
Amplifier Rickenbacker B9A
Amplifier Rickenbacker M8E
Amplifier Rickenbacker M8
Amplifier Quad II (lamp)
Amplifier Flutterman (lamp)
Amplifier 7242
Amplifier 6336A
Amplifier McIntosh C275
Amplifier McIntosh C240
Amplifier Marantz T1
Amplifier Marantz model 9
Amplifier Marantz model 8
Amplifier Marantz model 5
Amplifier Manley 35W
Amplifier Fairchild model 25
Amplifier Fender "Bandmaster" model AB763
Reverb Amplifier Fender "Bandmaster" model AA1069
Amplifier Fender "Bandmaster" model 6G7
Amplifier Fender "Bandmaster" model 5E7
Amplifier Fender "Bassman" model 5F6A
Amplifier Fender "Bassman" model 5F6
Amplifier Fender "Bassman" model 5E6A
Amplifier Fender "Bassman" model 5B6
Amplifier Fender "Bassman" model 135
Amplifier Esoteric RCA801A/RCA801A
Amplifier Esoteric 46/RCA801A
Amplifier Esoteric WE VT-52/45
Amplifier Esoteric RCA801A/RCA50
Amplifier Audio Note P4
Amplifier Audio Note Ankoru
Amplifier Audio Note 300B kit 1
Amplifier Audio Note Conquest
Electronic attenuator (simple)
Sound triggered flash. If you wish to take a picture of a fleeting event which generates a sound, you can do it with this sound activated trigger. (simple)
Low-Frequency Amplifier LA4558 (2x2,4W) amp
Low-Frequency Amplifier LA4555 (2x2,3W) amp
Low-Frequency Amplifier TA8215H-A (60W) amp
Low-Frequency Amplifier LA4183 (2x2,3W) amp
Low-Frequency Amplifier LA4182 (2x2,3W) amp
Low-Frequency Amplifier KA22061 (2x2,3W) amp
Low-Frequency Amplifier TA8210 (2x19W) amp
Low-Frequency Amplifier KA2206 (2x2,3W) amp
Low-Frequency Amplifier KIA6210 (2x18W) amp
Low-Frequency Amplifier LA4550 (2x2,1W) amp
Low-Frequency Amplifier TA8205 (2x15W) amp
Low-Frequency Amplifier LA4180 (2x1W) amp
Low-Frequency Amplifier KIA6205 (2x15W) amp
Low-Frequency Amplifier LM12 (150 W) amp
Audio-video switch. This is an 8-input x-output audio/video switch module to be controlled from a computer, for example from the parallel port.
Low impedance microphone amplifier
Ultrasonic receiver
High power 12v amplifier
80w 1 chip audio amp
Low level audio amp
RIAA phono amp
Ultrasonic generator
Wireless microphone
Telephone recording circuit
Electronic Whistle
Underwater microphone
Audible metronome
Three channel "snap"
Led flasher with audio
Two tone siren
Electronic siren
Mega phone circuit 9v
Parabolic dish mic amplifier
2-input mixer
2-transistor amplifier
Some BJT's suitable for power amplifiers
Symmetrical amplifier without differential first stage
Symmetrical amplifier
Discrete power amplifier with current-mirror
Yet some more schematics of power amps
Transistor power amplifier schematics
POWER AMPLIFIRS
HEADPHONE AMPLIFIERS
Simple transistor headphone amplifier
Simple headphone amplifier on OP amp
Pioneer KEH-1450 Audio Auto
Pioneer KEH-1400 Audio Auto
Pioneer KEH-1311 Audio Auto
Pioneer KEH-1300 Audio Auto
Pioneer KEH-1150 Audio Auto
Pioneer KEN-5400 Audio Auto
Pioneer KEH-1100 Audio Auto
Panasonic CQ-R30GLEE Audio Auto
Panasonic CQ-RD45LEN Audio Auto
Panasonic CQ-R35LEE Audio Auto
Panasonic CQ-R30LEE Audio Auto
Panasonic CQ-RD40LEN Audio Auto
LG-TCC2510 Audio Auto
LG-TCC2010 Audio Auto
LG-TCH70 Audio Auto
Panasonic CQ-J03LEE Audio Auto
Sony CDX-1150 Audio Auto
LG-TCC2515 Audio Auto
Aiwa CT-X418 Audio Auto
Aiwa CT-X218 Audio Auto
Aiwa CT-X208 Audio Auto
Panasonic CQ-R35VEG Audio Auto
Panasonic CQ-R30VEG Audio Auto
Aiwa CDC-X155 Audio Auto
Aiwa CDC-X175 Audio Auto
Aiwa CDC-X1750 Audio Auto
Aiwa CDC-R136 Audio Auto
Panasonic RC-X160 Audio
Panasonic RX-FT570 Audio
Panasonic RX-DT600 Audio
Panasonic RX-DT30 Audio
Panasonic RX-DS15 Audio
Panasonic RX-CT900 Audio
Panasonic RX-CT870 Audio
Panasonic RX-CT820 Audio
Panasonic RX-FS470 Audio
Aiwa CS-131 Audio
Aiwa CS-130 Audio
Technics SU-V620 Audio
Technics AZ7 Audio
Technics AZ6 Audio
Technics ST-GT350 Audio
Technics SU-A700MK2 Audio
Technics SL-PG480A Audio
Technics RS-575 Audio
Technics RS-474 Audio
Technics RS-373 Audio
Samsung MAX-960 Audio
Samsung MM16 Audio
Samsung MAX-980 Audio
Samsung MAX-805 Audio
Samsung MAX-920 Audio
Samsung MAX-900 Audio
Samsung MAX-445 Audio
Samsung MAX-800 Audio
Samsung MAX-555 Audio
Panasonic SA-CH32 Audio
50 Watt Audio Amplifier
25 Watt MosFet Audio Amplifier
DPA 880 schematic
DPA 440 schematic
DPA 220 schematic
Tone Control
Audio Graphic Equaliser
Audio preamplifier circuits
Hi-Fi Preamplifier
Perfect DAC
Silver DAC / V 3.5 DAC
Crystal DAC
Audio power amplifier TDA2025
Audio power amplifier STK40*
Service Manual. CD Mechanism 4ZG-1. Basic CD Mechanism KSM-2131FAM, 3ZG-2 E1/ E2/ E3. AIWA. 2138Kb
Radio Cassete Recorder FIRST ?556
Player FIRST
Vox Top Boost Preamp/ Tube Preamplifier
Vox Berkeley Preamp/ Tube Preamplifier
Mesa/Boogie Mark I Preamp/ Tube Preamplifier
David Hafler DH100 Transistor Preamplifier (part 2)
David Hafler DH100 Transistor Preamplifier (part 1)
Rane DA216a distribution amplifier/ Transistor Preamplifier
Marshall JCM 900 Preamp/ Tube Preamplifier
Rane VP 12 - VOICE PROCESSOR/ Transistor Preamplifier
Marshall Master Volume Preamp/ Tube Preamplifier
Rane PS 1 - PHONO Transistor PREAMPLIFIER
Rane MS 1 - MICROPHONE PREAMPLIFIER/ Transistor Preamplifier
Rane DMS 22 - 2-CHANNEL MICROPHONE Transistor PREAMPLIFIER
Vox (Thomas) Normal Channel Preamp. Transistor Preamplifier
Danelectro Silvertone 1484 Preamp. Tube Preamplifier
Vox (Thomas) Brilliant Channel Preamp. Transistor Preamplifier
AML+ Diagrams Tube Preamplifier
Vox (Thomas) Bass Channel Preamp. Transistor Preamplifier
Blaupunkt frankfurt rcm82
Blaupunkt granada sqr 49
Midi-keybord
Midi adapter for soundcard, with indicators. by george shepelev 2:461/124@fidonet
Upgrade player Panasonic rq-p45
Amplifier on the integral circuit TDA7294
Amplifier on three transistors
Audio power amplifier, Application Diagram: mPC1288v
Application Diagram: TDA1524
Audio power amplifier, Application Diagram: uPC1335
Audio power amplifier, Application Diagram: TA8215H-A ( 2x60 W )
Audio power amplifiers, Application Diagram: A2000V, A2005V, LM2005, TDA2004, TDA2005, MPC2005
Audio power amplifiers, Application Diagram: KA2206, KA22061, LA4180, LA4182, LA4183, LA4550, LA4555, LA4558
Stereo Car CD Receiver AIWA CDC-Z106- Service Manual (Schematic diagrams)
Telephone amplifier
Digital Volume Control
Speech Recorder
Auto Volume Control
CD-ROM Drive as Digital-audio CD-Player
AUTOMATIC SWITCH FOR AUDIO POWER AMPLIFIER
TELEPHONE AMPLIFIER
STEREO CASSETTE PLAYER
DIGITAL VOLUME CONTROL
Speaker Microphone Circuit- allows you to use a cheap loudspeaker as a microphone.
Audio Perimeter Monitor
12 Volt 30 Amp Power Supply
Doorphone Intercom
Peak Reading Audio Level Meter
Electronic Canary
Hi-Fi Preamplifier
6 Input Mixer 3 Mic inputs, 3 Line Inputs
Audio Notch Filter for audio frequencies 100Hz - 10KHz
TDA2030 8 Watt amplifier
Stereo Line Driver
Tone Controls
2 Watt low distortion amplifier using discrete components
Crystal Radio Amplifier (16k) An unusual amplifier that gives room-filling volume with a few parts.
Audio Amplifiers for Small Speaker Applications (32k) Two high gain amplifiers for adding audio to many projects.
Computer Speaker Amplifier (12k) This three-transistor amplifier delivers about 2 watts to an 8 ohm speaker.
Simple circuit to connect telephone equipment to audio mixer
20 Watt IC Power Amp- LM1875
Condenser microphone hookup
Microphone Preamp
Midi Passthrough Circuit
Paradoxical sound synthesizer
Simple Microphone Amplifier
Low Power Op-Amp - Audio Amp (Intercom)
3 Transistor Audio Amp (50 milliwatt)
Tone Control
Microphone Mixer
FET Audio Mixer
Directbox - "10 to one voltage divider" for direct input
tonnects - Equalizer
DOD Envelope Filter440 - Equalizer
brighten - Equalizer
3tone - Equalizer
3btoner - Equalizer
voxtbp - amplifier
Swiss army preamp
Rickenbacker B9A - amplifier
On Board Guitar Preamps
mu
Mic Preamp
Mic Preamp
Master Volume for Tube Amps
hpreg - amplifier
hpreb - amplifier
Gibson GA-30b - tube amplifier
Gibson GA-25 - tube amplifier
Gibson GA-20 - tube amplifier
Gibson GA-15 - tube amplifier
B16A, B16AD - tube amplifier
B16, B16D - tube amplifier
Dual Pre-Amp & A/B Box
8 watts amplifier
50 watts amplifier
90 watts audio power amplifier
68 watt audio power amplifier (LM3886) and bipolar power supply
Three Level Audio Power Indicator. Battery-operated 3 LED display
Self-powered Sine to Square wave Converter. Converts sine to square waves without a power-source
Precision Audio Millivoltmeter. Measures 10mV to 50Volt RMS in eight ranges
Phono Preamplifier. Simple circuitry for moving magnet cartridges
Decoding IR Remote Controls
Phone Line to Audio
IR Detector
100W RMS Amplifier
Op Amp Power supply- Dual +/- power supply.
Audio Tone Control- Shelving bass and treble tone controls.
Simple DAC
Op amp circuit #1- Basic inverting and non-inverting circuits.
Op amp circuit #2- Simple op amp differential amplifier ("balanced" input).
Op amp circuit #3- True balanced / instrumentation style input circuit.
Op amp circuit #4- Simple 4-input mixer stage.
Op amp circuit #5- Single supply op amp circuit.
Op amp circuit
Mic Preamp- Based on SSM-2017
JE-990 Discrete Op amp
Simple Discrete Op amp- made with common transistors
Audio Oscillator- Modified Wein Bridge
Audio Buffer
Sound Level Meter
Digital Volume Control
22 Watt Audio Amplifier
8 Note Tune Player
50 Watt Amplifier
Transistor Organ
8 Watt Audio Amp
Voltage controlled amplifier
Preamplifiers, audio
Microphone preamplifiers
Gyrator - used in graphic equaliser
Audio Signal Generator
Audio level LED meter
Audio amplifier, very low THD
Audio preamplifiers
555 Tone Generator (8 Ohm Speaker)
Simple microphone preamplifier
Speaker signals to line level inputs
Use amplifier phono input as line level input
Simple line mixer
Audio line isolator
300W Subwoofer Power Amplifier
Updated 60-100W Hi-Fi Power Amplifier
50 Watt Amplifier
Headphone distribution amp
1.5W Audio amplifier
Spatial Distortion Reduction Headphone Amp
50W Amplifier
Low-level audio amp
Headphone amplifier
10W amplifier
20W Amplifier
2W amplifier
Portable headphone amplifier
Single Ended Class A2 SV811-10 Stereo Amp
Bi-Directional 2.4 GHz One Watt Amplifier
80W amplifier
4W amplifier
2-Channel Power Amplifier
Personal stereo audio amp
Headphone amplifier
Two transistor audio amplifier
Low power RFID transponder
25W MOSFET amplifier
HeadBanger Headphone Amp
TDA2030 8 Watt amplifier
8 watt audio amp
Push-Pull Class A 2A3 Stereo Amp
Headphone monitor amp
Audio amplifier output relay delay
2W Amplifier
100W RMS Amplifier
LM383 12V Amplifier
Push-Pull Class A Amp using type 5687 dual triodes
Single Chip 50 Watt / 8 Ohm Power Amplifier
20 Watt GaAaFET Power on 2.3 GHz
300W Subwoofer Power Amplifier
Soft-Start Circuit For Power Amps
Audio Amp Output Power Limiter
El-Cheapo - A Really Simple Power Amplifier
Hi-Fi Headphone Amplifier
8 Watt amplifier
Death of Zen (DoZ) - A New Class-A Power Amp
Power amp schematic (PDF)
High quality exponential VCA
2304 and 3456 MHz Power Amplifiers
55W (Originally 75W) Power Amplifier
20 Watt Class-A Power Amplifier
Bi-Directional 900Mhz One Watt Amplifier
2.3 GHz Power Amplifiers
100W Guitar Amplifier
16 Watt amplifier
1 Watt 2.3 GHz RF Amplifier Using a MRF2001
Thermo-Fan To Keep Your Amp Cool
20 Watt / Channel Stereo Power Amplifier
Mini bench amplifier (LM386)
Multi-chip programmer
Electronic siren
Two-tone siren
Underwater microphone
Code practice oscillator
Noise generator
Electronic whistle
Twin-T Audio Sine Wave Oscillator
1.5V Audio Amplifier
Low Power Op-Amp - Audio Amp (Intercom)
555 Tone Generator (8 Ohm Speaker)
3 Transistor Audio Amp (50 milliwatt)
Low Frequency Sinewave Generator
Automatic Charger for Battery Operated Hi-Fi Preamps
Audio level indicator
Room noise detector
Amplifier timer
Bell ring generator
Amplified ear
Precision audio millivoltmeter
Six-channel Mixer and Amplifier
Audio Signal Source
Analog VU meter
Voltage controlled amplifier
Audio graphic equaliser
Intercom preamp
FET audio mixer
Microphone mixer
Tone control
Digital volume control
Sound level meter
CMOS IC audio oscillator
Three band Active Tone Control
Automatic gain control (AGC) circuits
Audio frequency meter
Bull Horn
Sound Mixer/Amplifier
Very loud beeper (PDF)
Digital noise generator (PDF)
Tone display system
Tube amplifier
Condenser microphone hookup
Phase shifter
Paradoxical Sound Syntheizer
Various tube crossover circuits
Bias circuits
Audio line isolator
Dynamic microphone to electret microphone input
Line level signal to microphone input adapter
Simple two line output combiner
Electret microphone powering circuits
Use amplifier phono input as line level input
Speaker signals to line level inputs
Spring reverb unit
Sine wave generator
Simple amplifier
3-Band equalizer
6-Input mixer
Doorphone intercom
Stereo line driver
Audio notch filer
Peak reading audio level meter
Tone control
Speaker Microphone Circuit
Electronic canary
Electronic siren
Microphone phantom power supply
Voltage Controlled Mixer w/Modulator
Dual Voltage Controlled Oscillator w/Modulator
Dual Voltage Controlled Filter w/Modulator
Stereo Ducker
MS Stereo Decoder
MS Stereo Microphone
RIAA Equalized Stereo Phono Preamp
Tube active crossover
Improved PL tone decoder
Magnetic cartridge amplifier
LM358 preamp
Sound detector
Tone detector
Tone generator
Warbler
Voltage Controlled Panner
Low Noise Microphone Preamplifier
Bridging Adapter For Power Amplifiers
Simple Surround Sound Decoder
Simplest Ever Amplifier Bridging
Stereo Width Controllers
Power Amplifier Clipping Indicator
Phono Preamps For All
Digital Delay Unit For Surround Sound
Parametric And Sub-Woofer Equaliser
High Quality Sound Mixer
Loudspeaker Protection and Muting
Direct Injection Box for Recording & PA Systems
Minimalist Discrete Hi-Fi Preamp
Signal Detecting Auto Power-On Unit
Load Sensing Automatic Switch
Amplifier thermal protection
Active Sub-Woofer and Controller
Balanced Line Driver & Receiver
VU And PPM Audio Metering
Variable Amplifier Impedance
Linkwitz Cosine Burst Generator
Low Noise Balanced Microphone Preamp
Fast Audio Peak Limiter
Subwoofer Equaliser
Surround Sound Decoder Mk2
Audio mixer
25 Watt MosFet Audio Amplifier
Audio Circuits
Audio Level Meter
Audio Notch Filter
Audio Voice-Over Circuit
Audio VU Meter
Peak Reading Audio Level Meter
Quadraphonic Amplifier
Soft Switching Amplifier with Tone Controls
TDA 2030 Amplifier
Computer Microphone
2 Watt Amplifier
Tone Controls
Dynamic Microphone Preamplifier
Doorphone Intercom
Stereo Line Driver
ECM Mic Preamplifier
Headphone Amplifier
Hi-Fi Preamplifier
6 Input Mixer
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