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

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