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  1. Arduino controlled Volume, bass, treble, input select
  2. Looking for op amp to boost line level signal
  3. Choosing connections methods between preamp and poweramp
  4. Multiple Butterworth filter question
  5. Phono stage noise when cartridge connected
  6. balanced line out driver
  7. Schematic to pcb Simple preamp LM358
  8. HT Bypass Circuit
  9. Can I use a Darlington Pair for an Input Buffer
  10. Calculating Voltage Divider (pot) Impedance...
  11. TGMC - a modular control pre-amplifier
  12. Index for: Arduino based LDR volume and source selection controller
  13. Pass through preamp.. mod an Irig?
  14. Marantz SR5400 as preamp?
  15. Low Gain Preamp Kit
  16. Audio coupling: 100nF in parallel with 100uF
  17. Deriving subwoofer channel from Lt & Rt
  18. Baxandall gain control according TI tidu34 certified design
  19. Any Good Chinese Built 3 Way Active
  20. Choosing resistor / capacitor values
  21. Op Amp Advice
  22. Best way to split RCA
  23. In general, the audio volume can be controlled by a simple VR (Variable Resistor)?
  24. Active all-pass filter design questions
  25. adding balanced output capability to my unbalanced 4-ch gain stage circuit
  26. Strange spikes on sine, square and triangle?
  27. Audio transformers
  28. Low Pass Filter consideration
  29. OPA627 and possible ESD damage
  30. Wright WLA12 / WLA12A Line Stage Topology
  31. Remote Volume AND Balance control
  32. Very Simple Single Stage Op Amp Preamp
  33. phase correction filter
  34. Clone Note LDR Attenuator
  35. Balanced PGA2311 volume control
  36. Passive preamp introduces hum
  37. Preamp, active
  38. Passive/active preamp (transformers, resitors)
  39. Monitoring B1 volume pot value
  40. Reverse log multi-position switch with 6 dB gain steps
  41. Ferrite bead between input and circuit ground
  42. New LDR for Rapberry PI
  43. db gain vs input sensitivity
  44. Broskie Enhanced-PSRR Hybrid Phono MM Stage
  45. Which way - trimmer resistor?
  46. Adding a buffer to Self's zero-impedance balanced output
  47. RCA Attenuator
  48. Analog way to Highpass my LS3/5a
  49. tube preamp buffer with distorted sound
  50. How to get started, looking a "Bruce Moore" sound.
  51. Recommendations for volume control and source selection?
  52. Source for Reel Motors (for Rewind and Fast Forward in 2-Motor Tape Decks)
  53. Buffered Preamp or Passive Volume Control?
  54. 3.5mm jack to rca - what conductors?
  55. THD and noise in audio circuits
  56. boosting output level
  57. Type of Switch
  58. service manual for Cambridge Azur 840E preamp
  59. Transformer source and load impedance question
  60. Line-Level Cable Alternatives
  61. Pioneer C-91 Preamplifier recap
  62. What 'sounds' worse, noise or distortion?
  63. How to determine what value Pot (attenuator)???
  64. Flea Market Score: NAD 116 Preamp
  65. Confusing problem with diy phono stage. Ground loop?
  66. Z-2300 Generic Logitech Control Pod Newbie Help
  67. Active or passive subwoofers filter for vintage JBL?
  68. Preamp 240v out socket
  69. Help with converting unbalanced to balanced using transformers (1:1)
  70. Not the BPBP Phonoclone - fully balanced MC RIAA
  71. Stereo to mono with switch: Do my circuits work?
  72. Wall mount line level volume control
  73. mono summing into monitor line in
  74. isotope Preamp
  75. Digital switcher for analog audio signal (e. g. electronic input selector for an amp)
  76. RIAA Phono filter.
  77. PLLXO WiringQuestion
  78. Lundahl Transformers for balancing output
  79. Impedance matching question.
  80. SSM2019 Mic Pre Lows Rolloff at 120 Hz - Why?
  81. Subwoofer filter help?
  82. Hafler DH101 film caps
  83. Preamp with NE5532
  84. Question about using a JT11P1 to convert unbalanced to balanced.
  85. virtual earth mixer NE5534 problem
  86. NAD S100 output impedance
  87. Fully-Featured Fono Faceplate ( Phono Preamp )
  88. Correcting offset through DC servo
  89. Bluetooth noise through input
  90. miniAVC - miniaturized Analog Volume Control
  91. PGA2311 and CS3310 Performance vs Input Impedance
  92. confusing symbol in fader send diagram
  93. Best Selector Switch? ..Advice plz!
  94. *HELP* NE5532P Tone Control Circuit
  95. Running 3+ way speaker setup with only two AMPs & a multi-channel computer sound card
  96. INA217 $5 preamp questions
  97. Single Rail Active Xover
  98. Help connecting microphone to preamplifier to speaker
  99. dbx 286s with hum/hiss when turning on phantom power
  100. Line level power-GND and signal-GND?
  101. Need PreAmp to match new amp
  102. Coupling Caps at Phono Input
  103. Behringer Pot Replacement
  104. Which lm3916 circuit to build?
  105. ESI gigaport soundcard output buffer question
  106. Help with DIY pre amp recommendations
  107. Modification/upgrade posibilities RCA input board tube line stage
  108. Audiolab pre amp advice needed. Any good?
  109. Volume Potentiometer Sizing and setup
  110. Balanced Cable Capacitance -- Conductor to Conductor or shield to conductor?
  111. Crossover hints
  112. H1ot signal into mic input?
  113. DIY interconnect with LP filter built-in?
  114. Can someone help to explain this op amp balanced output?
  115. Any Interest in BJT and FET DOAs (Discrete Op Amps) in 2520 format?
  116. Euridice line preamp
  117. Simulation programs
  118. Simplest 1st order high pass and low pass filter
  119. Help with designing an active, balanced input mixer with crossfader
  120. Volume control signal level
  121. Where to adjust regulator voltage?
  122. DC blocking cap
  123. Channel unbalance in active crossover
  124. line level attenuator calculation
  125. Simplest Passive Preamp design
  126. Changing a pot's value with parallel resistors
  127. Preamplifier for Rotel RHB 10
  128. High DC offset on preamp
  129. passive line level high pass crossover
  130. High pass filter for line level info needed
  131. Problem with Opera CY222 line preamp
  132. broskie triangle buffer not working
  133. BGW model 203
  134. Phone Mic Input Bias voltage effect
  135. Apex P30+ A class PSU...questions?
  136. Circuit for subwoofer crossover 25Hz to 250Hz
  137. Cascode buffer
  138. Can Someone please verify this circuit ?
  139. Signal/power path questions
  140. Linkwitz Transform... lowpass?
  141. how to design very stable, DC accurate LP filter with lots of gain?
  142. Relays in the volume control, reed or not reed (and other things)
  143. Technical Question 420ohm output preamp to 600ohm tube amp
  144. Building a Douglas Self design preamp
  145. Crossovers for beginners
  146. Pre-amplifier for electret mic and Line-in audio sources
  147. Current feedback amplifier circuit (preamp/headphone amp)
  148. tda7439 filter design
  149. Bridging Amps using a balanced line driver
  150. OPA2134 current consumption: more advice needed
  151. Can someone help a rookie with a DIY monitor controller?
  152. alps pot for passive volume control
  153. Yamaha c2 pre transformer question
  154. Opamp buffer @ active crossover input?
  155. opamp inversion?
  156. D-12 Hybrid LV Preamp!
  157. simplest discrete really-unity gain buffer
  158. MM28 phono preamplifier
  159. 600ohm passive xover for multiamp
  160. H-bridge killing transistors
  161. DAC balanced & Unbalanced output to bridged amp input
  162. Subsonic Filter Troubleshooting
  163. Which Graphic Equalizer Circuit Topology provides best Sonic Quality ? "Constant-Q" ?
  164. Recommend me a good quad soic opamp ?
  165. The boring but essential line stage
  166. Tresham DR3 pre amp Servicing
  167. Adding Remote Volume Control
  168. Line Level Crossover needed: to DIY or not
  169. +/- DC instead of +/- AC?
  170. CFP Unity Gain Buffer
  171. Preamp recommendation for Millett DCPP amp
  172. A/D Converter Driver - Active bandpass filter
  173. How to connect 3 mixers to 1 DSP
  174. Help with Millennia PRE AMP
  175. Balanced to unbalanced wiring help
  176. Forte 2 preamplifier power supply
  177. Promitheus TVC rebuilding
  178. Tone control schematic
  179. Active (Baxandall) Volume Control for Single Supply
  180. Pin Confirmation
  181. Cut out in one channel on Yamaha preamps CX-800
  182. PS 4.5 schematic
  183. An unusual preamplifier with multiple outputs
  184. Split signal
  185. Decoupling a quad opamp
  186. Help calculating low pass filter frequency
  187. Hybrid transformer-pot volume control
  188. B1 Buffer with a bad channel - need help!
  189. My new preamp design: Arduino, 6 input selector, MDAC attenuator, IR etc
  190. pre-amp problem!
  191. Active subwoofer filter
  192. Crazy distortion problem with transformer and active filter (opamp / Sallen Key)
  193. Passive pre-amp
  194. Universal Integrated Preamplifier
  195. Does Muses 72320 have OPAMP inside chip or not?
  196. Hybrid Borbely Follower/Buffer - Please Critique
  197. Line stage chassis layout
  198. Sanity check: input grounding scheme
  199. Graphic Equaliser SUPER QUIET
  200. Passive crossover design
  201. Suggestions for remote volume control
  202. Yamaha C65 - Repair: Burnt Board
  203. Audio/MIC 3.5mm to 3.5mm TRRS (mic wiring?)
  204. solid state buffer
  205. Best DIY tube preamp question
  206. Advice On Gain/Loading Switch Implementation Phono
  207. LPF on signal path
  208. Two chases preamp configuration question
  209. Muses 72320 dual mono unbalanced configuration question
  210. OPA2134 preamp
  211. Passive Sum two signals - Resistor Value Help
  212. Subwoofer phase shift
  213. PrimaLuna; Phonologue board subst.
  214. What is equalizer in practice ?
  215. X-over help - Will this setup work?
  216. Preamp board suggestions for Hypex UCD3XMP module
  217. Jfet buffers online.
  218. Musical Fidelity "The Preamp" - any good ?
  219. 1 PRE-OUT splitter to 2 AMPS
  220. Joining RCA inputs or splitters and quality
  221. Possible tube (almost) phono preamp design
  222. Chromecast Audio + Airplay as analog source: Can I use a Y-splitter?
  223. Preamp + headphone amp total gain
  224. Help with mixer using MCP6271 op amp
  225. Opinions on this passive pre schematic
  226. How to Wire Selector Switch & Vol Control
  227. Volume control: altering gain instead of attenuator? Good or bad?
  228. My first OPamp preamp PCB - few questions.
  229. Buffer the buffered filter?
  230. Op-Amp Circuit Components: Any Ideas About This Circuit Section's Function?
  231. preamp question/buffer scematic with muses 72320
  232. Horrible Freq Resp from my MX110
  233. Input/pass-through switch
  234. Salas DCG3 preamp (line & headphone)
  235. Phase Linear 2000 Pre-amp overhaul
  236. Rotel RTC 850 Problem
  237. Cabre AS45 active crossover
  238. Preamp causing distortion
  239. discrete preamp/gain module recommendation
  240. 1 transistor 3 band tone circuit, will it work?
  241. BPBP starter help
  242. Hi Freq rolloff with ne5532 based unbalancer
  243. Crossover Rebuild Advise
  244. Perreaux SM-2 need help with output transistors
  245. Crossover conversion
  246. Need finding simple high impedance pre-amp to boost signal to Schmitt Trigger circuit
  247. remote volume control
  248. 2SK932 Buffer
  249. Please help with cap orientation.
  250. Single Supply 2-way active XO

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