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  1. Help wanted checking vero layout for active 4 channel mixer
  2. Simple non-digital input selector
  3. dc on only one primary of the line trafo
  4. Volume potmeter Technics Su 8600
  5. Servo on non-inverting opamp ?
  6. Any suggestions to improve these output and input filters?
  7. simple solution for VU-Meter
  8. Combined Speaker-Amplifier Project
  9. Teac AN-60 Alignment
  10. 2.5v achieves lower distortion on LDR NSL32SR2
  11. Help Gain clone supply PCB design
  12. HOW TO MEASURE interference between e.g. 20kHz and 21kHz tones?
  13. 3-way signal splitter
  14. implimenting linkwitz's notch/dip filter for room eq
  15. Anyone seen this EQ before?
  16. ReCapping marantz av-9000 16v 13000uf
  17. Audio Processing
  18. Anyone know what these caps are for?
  19. Is coax needed to wire a microphone?
  20. How do I choose a preamplifier that would be compatible with this microphone?
  21. W06M – Bridge Rectifier, equivalent substitute
  22. Preamplifier kit information
  23. Handling +4dBu/-10dBv and un/balanced
  24. Line receiver and driver pcb?
  25. 2 conductor shielded cable
  26. HIGHLEVEL INPUT IN PLATE AMP!
  27. 20hz high pass on Ashly XR2000 - removable?
  28. Transformer Based Balanced Output & Impedance
  29. Poll for the participants of "John Curl's Blowtorch preamplifier part II"
  30. John Bowers Active Control Unit preamp: Info sought
  31. Looking for pointers on first DIY preamp please.
  32. Simple analog vu-meter driver ?
  33. Please pardon the noob question. need guidance
  34. Build a high pass filter for amplifier
  35. Critique on success of this subwoofer cutoff project?
  36. Need gain AMOUNT for mobile phone/pc sources
  37. re-replacing 2sk213/j76 transistors help
  38. Preventing crossover between mixers
  39. RCA LMI- 32215 A - for recording studio.
  40. Rane pot help please...
  41. Simple low voltage tube preamp stage
  42. HELP me design a discrete current sinking positive V regulator
  43. True Biamping and Active crossovers info request
  44. Question about hypex balanced vs unbalanced
  45. Soundcraftsmen
  46. very small noob question project 88
  47. Help with cable conundrum!
  48. P7 Pre amp Trouble
  49. Party-line / Full-duplex intercom - mixing audio signals
  50. ZSP1 preamp gain
  51. Acurus L10 Powersupply
  52. Building an Analog to Digital Converter Unit...
  53. DIY pre amp board
  54. Opamp power bypass
  55. Tone Control - Volatage range for TL072/LF252-N
  56. Stereo volume attenuation
  57. Quad channel volume control
  58. Work? L, R RCA inputs -> 1 XLR out?
  59. Impedance matching pre -> power.
  60. LME49740 vs TL074, design considerations and stability
  61. Solid state R2R attenuator using analog switches or multiplying DAC
  62. MF nuvista source selector problem again
  63. What do we think about solid-state potentiometers?
  64. TubeCAD's ACF2 as a active crossover
  65. Phaseca--My new diy pre amp
  66. looking for bass treble pcb pattern
  67. Mobile recording using linein
  68. [Need] simple preamp and LPF based on 5532 for digital sources
  69. wall-based trasformer volume control as passive pre?
  70. noob stab in the dark - riaa preamp
  71. Oscillating Op-Amp
  72. Preamp for shotgun mic
  73. Mark Levinson No 38, Need Help
  74. Help! Kenwood Basic C-2 left channel out (phono only)
  75. Signal delay schematic
  76. Adding 4 channels to a 2 channel input on HT amp
  77. vumeter (stereo, mono)
  78. Acquired Some Elan Components, What are They?
  79. Pre-mix for boombox
  80. Reed Switch Audio Attenuator
  81. "Balanced" PGA2311?
  82. 2 way crossover on Chinese pcbs
  83. SE to Balanced pre question
  84. Interconnect Ground Cable Ground Loops
  85. PGA2310 - PGA2311 - CS3310: version without OPAMP for outdoor OPAmp connection wanted
  86. Any AIKIDO-philes who know why Broskie has changed the formula
  87. One More Overcomplicated Mic Preamp
  88. Problems with subwoofer phase control picking up noise
  89. IC's get hammered
  90. Left/Right channel balance control
  91. Potentiometer Selection
  92. All-In-One Preamp Circuit
  93. Line level mixing
  94. Booze Hounds Labs Phono any good?
  95. PLLXO - Am I doing this right?
  96. Need an Active 2nd Order Low Shelf Filter aka Low Shelving Filter
  97. Switching Noise Between Preamps
  98. Bluetooth Lightspeed attenuator
  99. Help getting 5.1 preamp from Ebay repaired please!
  100. Should using balanced cables to amplified monitors improve sound ?
  101. Apox Audio preamp reborn with the power of Arduino
  102. Does an Op Amp Voltage Follower Operate in Class A?
  103. My boozehound phono stage build
  104. Pre amp kit
  105. balanced preamplifier based on LME49990
  106. Merging two channels with passive low passes
  107. Old Colony Sound Lab T-2D Line Amp - Any Info?
  108. Impedance Bridging and Isolation Tranformer
  109. TDA7315 chip parameters interpretation
  110. MFP-102 N fet compatibility
  111. What is the effect of a 22K res in series with a 25K volume pot?
  112. Senior Project: Bandpass Equalizer pedal
  113. [WANTED] Mark Levinson No 26S Service Manual/Schematic
  114. ORTF is best for stereo recording
  115. A zero impedance preamp and CMRR
  116. good preamp
  117. calculate crossover with Re or impedance ?
  118. Op-Amp Preamp Circuit for Electret Mic
  119. Simple Router (then bass management)
  120. Second order shelving filter
  121. Help with component selection.
  122. passive to tame 8khz peak
  123. Hafler SE100 Preamplifier / Symmetric B1 buffer hybrid
  124. Adcom GFP-750 -Needs Repair
  125. Variable gain op-amp for volume control (vs normal voltage divider pot)
  126. Germanium Transistor and FET opamp
  127. 5 zone preamp based on Arduino controlled optocoupler
  128. How to select the right impedance for volume control
  129. In vehicle Pre-amp for mic (12+ VDC)
  130. Resistor-Diode-Relay Logic Source Selector
  131. 3 into 1 input the other way round
  132. Nagging Ground Issue
  133. Looking for Princeton Applied Research 115 MANUAL
  134. Active Band Pass Filter with +/- Gain
  135. Components source
  136. Guitar ABY or Headphone Amplifier?
  137. rod elliot p88 preamp knob arrangment
  138. C-Mos opamps in audio preamplifiers
  139. Cheap, balanced XLR passive pre?
  140. DIY crossover - Sallen-Key?
  141. Hafler 915 preamp cap question
  142. analog 3.5mm to digital usb possible?
  143. Mixer Pre-amp
  144. DIY tube preamp - help with choosing the right kit
  145. opamp channels mysteriously mixing ¿quantum thing or me too dumb?
  146. MC-22 schematic question
  147. unbalanced/balanced to balanced converter
  148. My line buffer preamp
  149. Attenuating Preamp Filter Question
  150. biamping with one DAC
  151. Audiophile active crossover
  152. adding EQ without screwing up sound; few questions...
  153. SSTART Pcb and power supply project
  154. Help with a simple envelop detector filter. (averaging the signal)
  155. audio output switch? Monitor Controller
  156. Very simple volume control with IR remote
  157. JFETs and MOSFETs biasing questions
  158. I need advise on audio mixing boards?
  159. pre amp output
  160. OPA134 Amp Help
  161. OPA134
  162. Capacitors voltage rating
  163. Capacitors voltage rating
  164. attenuation on dac output with U-pad
  165. passive preamp
  166. preamp necessary?
  167. Will phono pre > passive pre > amp work well enough?
  168. 60Hz hum problem, please help
  169. distortion cancellation for diode limiter
  170. electret mic preamp for micro ADC
  171. Understanding "Voltage - Input Offset" Parameter
  172. Schade MOSFET + Feedback Line Amp
  173. Preamp or receiver?
  174. Sony BX-270 Datasheet Wanted
  175. Classe Audio DR6 Bias
  176. Dual gang potentiometer for 'mixer'
  177. Aikido Preamp Bass & Treble Controls
  178. Tried active crossover, mean hum...
  179. How to use TDA7439 for center and subwoofer
  180. Active notch filter
  181. simple pre amp volume control with seperate mono out
  182. Help me wire up my SUT correctly (Tamura TKS-27)
  183. How can I split a mixer bus?
  184. Beau's Bias Circuit Schematic
  185. What should be included in a subwoofer lowpass filter?
  186. Potentiometer volume control treble loss bleed
  187. Adcom GFP 815 Pre Amp-Any users?
  188. speaker out to preamp out while driving speaker
  189. 6dB Active crossover
  190. Replacing volume pot from 100K to 50K reduces gain?
  191. Dual Ganged Stereo Volume Control
  192. McIntosh/Conrad Johnson pairing
  193. Input Impedance Question
  194. Active studio monitors/ crossovers
  195. new discrete opamp for line preamplifier
  196. Music Angel Pre Amp
  197. Tilt Equalizer Filter
  198. Parametric EQ based bass boost circuit
  199. Power On Delay/Loss of AC Detector Relay
  200. Balanced Line Driver with DRV134
  201. PGA3211 6.1 assembling
  202. PGA2311 code
  203. SMD High-Voltage Discrete Diamond Buffer
  204. How best to implement image mode controls
  205. Preamp has unwanted delay (and hum)
  206. Pot values in LM1036 preamp circuit
  207. simple three steps attenuator
  208. Behringer Eurorack UB1622fx PRO schematic
  209. Need help with Coustic XM-5e Crossover
  210. Small Fader + Volume control for Car
  211. PGA2311 Evaluation
  212. Are these pots what I need for my preamp?
  213. IR Remote Control
  214. That Corporation 1200 , 1203 , 1206 circuits
  215. portable set field mixer/ mic pre
  216. Compact simple EQ
  217. Digitally controlled pot distortion?
  218. Help me Choose Between A and B
  219. Quad Eight Electronics EQ712
  220. Adding a line level output to PGA2311 preamp
  221. Using Joachim Gerhard Filter Buffers as balanced crossover
  222. Impedance measuring jig and iSEMcon kit
  223. LM1036N Potentiometer Type
  224. 4558d
  225. 10M45 as simple preamp...
  226. Kenwood c-2 balance pot
  227. Attenuator Impedance for Adcom GFA-535?
  228. McIntosh C712 Preamplifier - Schematic wanted
  229. Speaker Combination in Custom Installation, please help
  230. 5 band equalizer, need help!!
  231. Parasound P/HP-850 Preamp Problem
  232. Crossover between pre and power amp for sub
  233. miniDSP pre-amp & volume control idea
  234. Klark Teknik Upgrae for 2ch
  235. signal level
  236. THAT 1200 Balaced Receiver IC?
  237. Patch Bay With Buffered Splitter/Channel Inputs Ideas
  238. Can't seem to get OpAmps to work
  239. Yamaha Equalizer 1027 service manual wanted
  240. Yamaha RX-V480 Tuner / FM Bands Wacky
  241. Discrete MOSFET 12db High Pass Filter
  242. ESP Proyect97 PCB
  243. Christmas Project - Audio Analyser
  244. HELP : what wattage for resistor ?
  245. x'over for a sub?
  246. Overlay stereo with mono, without losing stereo?
  247. Hi Level Amp output connect to RCA input
  248. Uneven Hafler 110 output
  249. Preamp-Buffers - simple idea
  250. OPA1612 compared to OPA2228(and a lil question about caps)

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