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  1. Need analog guru help on grounding
  2. iRig Pre Component Upgrade
  3. Calculating a TVC
  4. Balanced Microphone Preamplifier
  5. Electret Condenser Microphone preamp analysis
  6. LF Line Level Stage design to preceed class D amplifier
  7. Mic Preamp w transformer input: changing impedance
  8. Line level / unity gain vacuum tube circuits
  9. Interpret stereophile measurement data
  10. Diy passive pre and switch
  11. slow audio increase at turn on?
  12. Hammond Amplifier Modification Issue
  13. Would like some help with a "Crossover Isolator"
  14. Correct way to split line level inside dual headphone amp
  15. How can this work?
  16. Balanced input
  17. crossover / summer for "2.1" active or passive
  18. Need Advice for Bi-amping
  19. Too much DC at buffer's output
  20. passive pre-amp ?
  21. Salvaged Phono Preamp - Begginner Help
  22. Tape head amplification circuit
  23. Laptop to Guitar Amp cable. . . Resistor values?
  24. Hifi from german studio modules - help wanted
  25. Guard rings for op amps
  26. Tone control for Low bass selector and boost circuit
  27. "Lehmann" Buffer Output Transistors.
  28. Minuature Low Pass Filter
  29. Easy High-Pass Filter
  30. Analog signal control
  31. Buffer Stage
  32. Critique my first drawing / possible build [Active DI]
  33. Low pass filter for Bitstream DAC.
  34. Looking for 0-10V Analog Volume Control Circuit
  35. AVC
  36. looking for programmable eq chip / pcba module ??
  37. Another Modified PGA2311 kit with Arduino for volume control and input selection
  38. Kudies to/for the Tortuga Audio LDR3X.V2
  39. Parasound P/HP 850
  40. LECUA 1000 attenuator from Luxman ?
  41. Line Level Output to Guitar Amplifier Input
  42. is there an off the shelf preamp module that works with the apple remote?
  43. How about this sub crossover filter?
  44. help with 2 pole low pass filter/attenuator
  45. Zobel at the srpp input
  46. Preamp noise after PSU update
  47. Low level interconnect (RCA) measurements
  48. what are the blocks generally found in a pre-amp board?
  49. Carver ct-3 preamp
  50. Advice on a preamp/external volume control for use with active monitors
  51. Audiophile quality preamp
  52. Building a Line Level Mixer, Transformer advice needed
  53. Sowter type 3232
  54. Super tone controls-I need PCB
  55. L-pad attenuator on preamp output
  56. DI output protection from phantom power
  57. Getting Started on Preamp Design
  58. Balanced to unbalanced.
  59. Input device protection
  60. WTB LDR volume control PCB ?
  61. Adding Input Gain +/-
  62. Room correction using a modified Linkwitz Transform Circuit
  63. How to change active xover frecuencies
  64. non inverting opamp with gain
  65. Digital volume control for 7.1 preamp
  66. Current options for a budget active LLXO?
  67. low impedance high-pass filter
  68. AKG Perception 100 mic repair
  69. How do I configure a simple logic control
  70. PCB, Tone Control with Transistors and dual supply
  71. very very simple DJ mixer aka summing amp?
  72. Passive low pass filter for subwoofer
  73. Linn Exotik/S non DA version lock up problem
  74. Shine7 12au7 preamp builds?
  75. non-DSP delay - is it possible?
  76. Stevens & Billington TX102 Passive preamp Built
  77. Loading considerations in Filter design
  78. TEAD (Tom Evans Audio Design) Groove RIAA MC Phono Preamp - want simplified Schematic
  79. Diodes instead of input selector (insane newbie question)?
  80. Experience with anti-parallel electrolytic capacitors?
  81. Best wire for passive pre?
  82. Which Op Amp Supply Bypass Technique for Low Noise?
  83. Add MONO/DIM to DAC/Preamp
  84. Crackling from input cable (even when there is no input)
  85. Best sounding signal level relay?
  86. Mic preamp around transformer
  87. Questions on op amp settling time and quiescent current.
  88. question on crossover board layout
  89. Bugle 2 problem
  90. Rca Passive Summing Box
  91. RC Chain in a 3 Band Baxandall EQ Circuit?
  92. Parallel transformer output
  93. Modding Marantz PM-15S1
  94. Sony TA4300F Crossover
  95. Upgrading a commercial phono stage
  96. New Bonsai Preamp
  97. Help with line input switch
  98. Remember the thermal noise....
  99. Help with passive attenuator for headphone amp
  100. Do amp inputs interact with each other?
  101. 6n11 preamp hum
  102. need help with boombox pre-amp/tone control design
  103. Muses01 op amp mod for Rotel RSP-1098(+\-18v)?
  104. low pass filter for DAC output
  105. Driving headphone from speaker output - filtering layout
  106. Highpass mic filter
  107. suitable power supply for dozen opamps?
  108. Little sub preamp/phase circuit
  109. RCA Mixer/Combiner
  110. Offset Problem with Borbely JFET-Buffers
  111. op amp class a bias
  112. Effects of Opamp Loading?
  113. Alps RK27 Motorized Pot - Teardown
  114. TDA7439 tone control IC any good?
  115. 100HZ PLLXO
  116. Bourns PTD90 Series Potentiometer
  117. lowest load for line level equipment to not harm the output stage?
  118. Most important opamp?
  119. 5.1 decode in preamp?
  120. Preamp Recommendation For Millett "Engineer's Amplifier"
  121. Tone feedback loop- can you spot the problem?
  122. DIY turnable amplifier aka RIAA - newbie questions!
  123. Great Deal on RCA Interconnects (Canada)
  124. preamp for hlly tamp-90
  125. AD815ARB-24 availability in any online stores? couldnt find
  126. Super Chip Preamp v1.2 (LT1363)
  127. Opinion on differential low pass filter
  128. Active Low Pass
  129. Differential preamplifier
  130. trouble with varimu compressor design
  131. PGA2311 volume control.
  132. Active Crossover frequency response - help needed HH X300
  133. Suggestion For CFA Op-amp
  134. preamp/mixer combo
  135. 12 channel volume control unit?
  136. Documentation on designing preamps
  137. Clean Line Output? OPA627
  138. Active crossover with AD815?
  139. Carlos AD815 pre voltage supply recommendations
  140. Help with Sowter 1990 SUT wiring
  141. Line level rc lowpass clicking
  142. Attenuator for Passive pre amp, best sounding solution
  143. Source for custom-terminated interconnects ?
  144. Onboard JFET Instrument Low-Z Preamp Help?
  145. Why white noise is always present?
  146. How to implement a pop free/low distortion muting circuit?
  147. Suggestions Requested for Mini Buffer Preamp
  148. Mini-Me second edition tube phono preamp
  149. Balanced fixed H attenuator for line level
  150. impedance symptom
  151. How to link two cores with TRS connector?
  152. Turntable earthing woes
  153. tuac weight and tops preamp
  154. Suggestions for single bipolar input op amp?
  155. Pop/click free HW-based relay attenuator
  156. THAT 1646 PCB - help me review please
  157. new line-preamp
  158. Question on Rod Elliott's P088 op-amp based preamp
  159. Pot hum/external speakers
  160. Will this circuit work?
  161. wiring sub to tube stereo
  162. TI on Filter Noise
  163. Compressor design - Sedra/Smith book
  164. ultra low dist pre Sandman distortion null
  165. Grounding question in phono preamp with battery supply
  166. LME49990 in gain buffer - help please
  167. Khozomo MKII Attenuator review
  168. Which MM Phono Amp ?
  169. Transistors in Buffer Circuit Running Too Hot
  170. Building a complete Preamp with an Arduino, remote, volume and input control
  171. MOSFET's Rds in the signal path, when?
  172. Preferences for setting up an EQ
  173. One more volume control
  174. Shedding 2 awful junctions in the signal path
  175. Line level distribution
  176. INA217 gain calculation
  177. Does this circuit have gain?
  178. An interesting JFET-based active XO circuit from TNT Audio
  179. Peak detector reference voltage level
  180. Goldmund Mimesis 27 Preamp clone
  181. AKAI S3200XL unbal to balanced outputs with VT24499
  182. MooseFET preamplifier?
  183. 6ch(12ch) Volume Control for DSP/DAC/BUFFER/POWERAMP
  184. Parametric EQ after pre-amp
  185. TL072 VS NE5532
  186. Grounding question
  187. Need best tone control
  188. How to switch 2 Sources and 2 Amps
  189. Mic Preamp limitor/Automatic level controller
  190. Douglas Self PreAmp 2012
  191. Is this layout OK? Advice please :)
  192. Microphone Preamp balanced voltage levels
  193. PASSIVE PRE-AMPLIFIER BUILDER REQ
  194. active bass boost
  195. SSM2019 single chip preamplifier?
  196. Rane AC23B active crossover
  197. XD3 crossover?
  198. Muting Circuit
  199. Noticeable difference in low freqs between two channels on a Drawmer DL221 compressor
  200. The precise audio signal level control 5.1
  201. Yamaha a-320
  202. Why not Wye?
  203. Help with high DC at output of Forte clone
  204. Humming DRV134 balanced output.
  205. Problem with parametric equalizer
  206. HLLY AMK-II First (and last) Impressions
  207. Salas hotrodded DCB1 resistor tryouts
  208. NE5532 in quad TSSOP package or similar?
  209. Another low distortion buffer
  210. DBX-122 schematic
  211. Audible Illusions L1 background noise
  212. TDA1524A IC Pre-Amp
  213. Please confirm something basic for me
  214. Parasound P/PH-100 hum
  215. Sonographe SC22 schematics
  216. What makes Reference Line Preeminence so good?
  217. push switch pinout
  218. What is 'Good' Common Mode Rejection?
  219. mf x-p100 power supply
  220. Opamp Having Oscillation
  221. Yamaha MSP7 − 22pF between Op Amp inputs? Why?
  222. How to reduce measured noise floor in my DAC/opamp circuit
  223. Switch Types
  224. Simple MOSFET preamp
  225. The Kuartlotron - keantoken's simple error-correction superbuffer
  226. how much gain do i get on this preamp(ad797)?
  227. how to implement line level bsc on a full balanced setup?
  228. 3 channel quad mixer with front to rear pan
  229. Meridian 502 balanced output circuit
  230. kmtech 2 way, active x over, is it elliptical?
  231. Attenuator kit suggestions sought
  232. How do you create a low shelf with passives?
  233. harman opamp advice
  234. Help needed with a transamp mic preamp circuit.
  235. Kleos 2 Way JFET Crossover with EQ
  236. see this preamp circuit diagram
  237. pre-amp tune up
  238. Preamplifier with aux and mic inputs
  239. Schematic wanted for portable SONY Monaural Receiver ICF-6000L
  240. Need a high quality SS mic preamp kit
  241. Marantz 2270 Preamp
  242. Source selector without mechanical switch
  243. Imaging skewed to the left
  244. THD calc from spectrum analyzer help
  245. A question regarding "loudness"
  246. Did I put these back in the correct spots?
  247. Lookin for nice simple XLR out preamp?
  248. Boz preamp and PLLXO
  249. Sound City studios/Neve etc Documentary
  250. Adding a tube preamp to a solid state combo amp

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