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

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