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  1. lpf calculator
  2. impedance matching question
  3. Custom 6H30 linestage
  4. DIY microphone preamp for Monacor MCE-404U capsule
  5. AD815 or THS6012 pros and cons
  6. What is the impedance out of a voltage divider?
  7. Phono Preamp Question...
  8. Analogue Parametric EQ - Calrec Polar...
  9. Sony pcm 7010 - XLR to RCA input
  10. TDA1524A preamp
  11. Wishlist: Op Amp Characterization Curves in Datasheets
  12. Parametric Mid EQ Pot Wiring
  13. Need PS Audio PS IV schematic
  14. Adding Balanced Outputs Psuedo or Real?
  15. Sending an A/V multi channel pre out into another A/V line in?
  16. Copper purity of Cat-5e cable ?
  17. Balance control?
  18. Input/output transformer question
  19. Equalizing the midrange out of a small Radio Shack driver
  20. what ohmage potentiometer for line out volume control?
  21. preamp signal powered down amp
  22. Passive Balanced Attenuator (between Pre & Power)
  23. Best way to add stereo subwoofer pre-outs to existing DAC/preamp?
  24. iPhone Line Out to Car Amp
  25. Is LR4 phase shift audible
  26. line preamp /buffer /module
  27. Please evaluate this RIAA schematic (njm4580)
  28. Praamp crackling
  29. Buffer Jfet
  30. Onkyo SC-901 crossover rebuild(upgrade)
  31. Art Tube MP Help!
  32. How is the sound of the Radford ZD22 preamp compared to modern high-end preamps ?
  33. from stereo to mono (subwoofer) passive adder ?
  34. Newbie Question: Troubleshooting Simple Line Mixer
  35. About preamp circuits improvements
  36. Noob Question: Electros in signal path
  37. Passive or feedback RIAA network tube phono pre?
  38. THAT1606 based line buffer for balanced guitar - Vero design okay?
  39. Attenuating line level signal with buffer vs. resistor...
  40. New Guy Needs Help With Optimus 31-2025 Graphic Equalizer
  41. Preamp: opamp low pass filter for PS noise
  42. I could use some help on a PS Audio Preamp
  43. another opamp based preamp
  44. Comment on Grounding Scheme?
  45. Radio Shack experimenter kits
  46. Crossover for Scan Speak 6000 tweeter.
  47. Neutrik nte 10/3 help
  48. RCA to XLR
  49. BBE XR-5383 chip
  50. Balanced level preamp
  51. cinemag CMLI-15/15B, unbal--> bal
  52. Pin 1: Multiple XLRs between two amplifiers
  53. Connecting Mp3 player
  54. DIY Tone + Volume control
  55. volume control
  56. Linkwitz-Riley Electronic Crossover PCB
  57. Balanced Microphone Preamp
  58. How Much Voltage Do I Need For a Standard Headphone
  59. Yet another passive volume control
  60. Distortion and Source Impedance in JFET Input Op Amps
  61. Analog switches
  62. Yuan Jing 6n3 tube preamp power requirements and options
  63. PGA2310 frequency response
  64. Smoking Preamplifier
  65. Carver C1 preamp
  66. Meridian 201 help
  67. Active speaker- adding amp/xo
  68. basic power supply questions
  69. McIntosh C26 hum after recaping
  70. Old Volvo Tape Deck Line Level to Tape Head
  71. I Need A New Audio Input Indicator
  72. Handy Non Inverting Active Volume Control
  73. Active volume control - Be quiet please.
  74. Complementary MOS Preamp
  75. BUFFER /LINE STAGE/ BEST POSSIBLE SPEC and SOUND
  76. Simple Symmetrical Preamplifier
  77. EMT-240, EMT 262
  78. Looking for that person who can analyze and upgrade.
  79. TKD stereo attenuator 10k
  80. Douglas self four-band baxandall eq
  81. Input Noise Cancelation - LME 49990 - LT1028
  82. Baxandall Variations
  83. HELP! Electret mic - Powering from Focusrite mic preamp with 48v
  84. Output Transformer for INA217 Mic Preamp?
  85. Advise please on EQ restore...
  86. Recommendations for pre/mixer/thing boards or etc.?
  87. Daisy chain components
  88. Unidirectional Electert Mic and Preamp help.
  89. Rotary stepped attenuator (series) instructions?
  90. High Quality Splitters and Mixers
  91. Which transformations inside this Django?
  92. Balanced stepped attenuator with constant input impedance
  93. 4-ch unbalanced as stereo balanced?
  94. zobel network at driver Fs?
  95. another relay input/volume controller
  96. Basic Inverting Opamp HUM
  97. Recommendations for a simple, opamp-based low-gain stage?
  98. Art Project needs advise, wall of boomboxes
  99. Attenuator design for a modular synth?
  100. Pot values for tone control - from 25k to 10k
  101. Needing Stereo to Mono Summing help...
  102. 2.1 preamp
  103. A little advice, re capping
  104. 8 ohm volume pot
  105. Naim NAC 32.5 Gain board lower gain
  106. P7 Mini Preamp Possible Improvements
  107. Hum issue in hpf circuit
  108. CS3318 Volume Control board with IR?
  109. Balanced line behaviour on Mixer's output
  110. Akitika PR101 Preamp by Dan Joffe
  111. Which one of these wiring schemes will have lower noise?
  112. Need help identifying preamp internals. Conrad Johnson PV-1?
  113. New edition D. Self Small Signal Audio Design
  114. Subwoofer preamplifier with low frequency boost below 30Hz?
  115. Spectrum analyser using LM3915
  116. 9V opamp suggestions
  117. Circlotron LINE and RIAA Pre-Amplifiers wanted
  118. JFET choice for transformer coupled mic preamp
  119. understanding source+return current flow on PCBs
  120. Why are JRC MUSE01 and MUSE02 opamps so expensive?
  121. can use la3161 as a simple solution in a car ?
  122. crossover commission/kit
  123. Switch both sides of input connections?
  124. Hammond 140QEX
  125. Current Amplifyer
  126. An Old Nikko power-supply section question
  127. THAT 202XT VCA + ?
  128. Need analog guru help on grounding
  129. iRig Pre Component Upgrade
  130. Calculating a TVC
  131. Balanced Microphone Preamplifier
  132. Electret Condenser Microphone preamp analysis
  133. LF Line Level Stage design to preceed class D amplifier
  134. Mic Preamp w transformer input: changing impedance
  135. Line level / unity gain vacuum tube circuits
  136. Interpret stereophile measurement data
  137. Diy passive pre and switch
  138. slow audio increase at turn on?
  139. Hammond Amplifier Modification Issue
  140. Would like some help with a "Crossover Isolator"
  141. Correct way to split line level inside dual headphone amp
  142. How can this work?
  143. Balanced input
  144. crossover / summer for "2.1" active or passive
  145. Need Advice for Bi-amping
  146. Too much DC at buffer's output
  147. passive pre-amp ?
  148. Salvaged Phono Preamp - Begginner Help
  149. Tape head amplification circuit
  150. Laptop to Guitar Amp cable. . . Resistor values?
  151. Hifi from german studio modules - help wanted
  152. Guard rings for op amps
  153. Tone control for Low bass selector and boost circuit
  154. "Lehmann" Buffer Output Transistors.
  155. Minuature Low Pass Filter
  156. Easy High-Pass Filter
  157. Analog signal control
  158. Buffer Stage
  159. Critique my first drawing / possible build [Active DI]
  160. Low pass filter for Bitstream DAC.
  161. Looking for 0-10V Analog Volume Control Circuit
  162. AVC
  163. looking for programmable eq chip / pcba module ??
  164. Another Modified PGA2311 kit with Arduino for volume control and input selection
  165. Kudies to/for the Tortuga Audio LDR3X.V2
  166. Parasound P/HP 850
  167. LECUA 1000 attenuator from Luxman ?
  168. Line Level Output to Guitar Amplifier Input
  169. is there an off the shelf preamp module that works with the apple remote?
  170. How about this sub crossover filter?
  171. help with 2 pole low pass filter/attenuator
  172. Zobel at the srpp input
  173. Preamp noise after PSU update
  174. Low level interconnect (RCA) measurements
  175. what are the blocks generally found in a pre-amp board?
  176. Carver ct-3 preamp
  177. Advice on a preamp/external volume control for use with active monitors
  178. Audiophile quality preamp
  179. Building a Line Level Mixer, Transformer advice needed
  180. Sowter type 3232
  181. Super tone controls-I need PCB
  182. L-pad attenuator on preamp output
  183. DI output protection from phantom power
  184. Getting Started on Preamp Design
  185. Balanced to unbalanced.
  186. Input device protection
  187. WTB LDR volume control PCB ?
  188. Adding Input Gain +/-
  189. Room correction using a modified Linkwitz Transform Circuit
  190. How to change active xover frecuencies
  191. non inverting opamp with gain
  192. Digital volume control for 7.1 preamp
  193. Current options for a budget active LLXO?
  194. low impedance high-pass filter
  195. AKG Perception 100 mic repair
  196. How do I configure a simple logic control
  197. PCB, Tone Control with Transistors and dual supply
  198. very very simple DJ mixer aka summing amp?
  199. Passive low pass filter for subwoofer
  200. Linn Exotik/S non DA version lock up problem
  201. Shine7 12au7 preamp builds?
  202. non-DSP delay - is it possible?
  203. Stevens & Billington TX102 Passive preamp Built
  204. Loading considerations in Filter design
  205. TEAD (Tom Evans Audio Design) Groove RIAA MC Phono Preamp - want simplified Schematic
  206. Diodes instead of input selector (insane newbie question)?
  207. Experience with anti-parallel electrolytic capacitors?
  208. Best wire for passive pre?
  209. Which Op Amp Supply Bypass Technique for Low Noise?
  210. Add MONO/DIM to DAC/Preamp
  211. Crackling from input cable (even when there is no input)
  212. Best sounding signal level relay?
  213. Mic preamp around transformer
  214. Questions on op amp settling time and quiescent current.
  215. question on crossover board layout
  216. Bugle 2 problem
  217. Rca Passive Summing Box
  218. RC Chain in a 3 Band Baxandall EQ Circuit?
  219. Parallel transformer output
  220. Modding Marantz PM-15S1
  221. Sony TA4300F Crossover
  222. Upgrading a commercial phono stage
  223. New Bonsai Preamp
  224. Help with line input switch
  225. Remember the thermal noise....
  226. Help with passive attenuator for headphone amp
  227. Do amp inputs interact with each other?
  228. 6n11 preamp hum
  229. need help with boombox pre-amp/tone control design
  230. Muses01 op amp mod for Rotel RSP-1098(+\-18v)?
  231. low pass filter for DAC output
  232. Driving headphone from speaker output - filtering layout
  233. Highpass mic filter
  234. suitable power supply for dozen opamps?
  235. Little sub preamp/phase circuit
  236. RCA Mixer/Combiner
  237. Offset Problem with Borbely JFET-Buffers
  238. op amp class a bias
  239. Effects of Opamp Loading?
  240. Alps RK27 Motorized Pot - Teardown
  241. TDA7439 tone control IC any good?
  242. 100HZ PLLXO
  243. Bourns PTD90 Series Potentiometer
  244. lowest load for line level equipment to not harm the output stage?
  245. Most important opamp?
  246. 5.1 decode in preamp?
  247. Preamp Recommendation For Millett "Engineer's Amplifier"
  248. Tone feedback loop- can you spot the problem?
  249. DIY turnable amplifier aka RIAA - newbie questions!
  250. Great Deal on RCA Interconnects (Canada)

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