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  1. Simple stereo gain stage
  2. Jadis JP-80MC power supply
  3. Mic, Line, EQ... Preamps
  4. Looking to build a phono stage
  5. Preamplifier Dispre 2 - JFET
  6. Active Crossover Using transistors.
  7. Op amp upgrade
  8. Phono Preamp Problem.
  9. Slight Hum From IC
  10. Lightspeed with a Tube Output Stage
  11. quick n dirty volume control
  12. passive preamp idea - will this work?
  13. 7.1 surround volume control
  14. LED VU metre - how to achieve inertia.. ?
  15. Expander
  16. Integrated Amp as a Pre-Amp
  17. Resistor mystery.
  18. PCB for source selection to go with lighter note
  19. Precision rectifier - gain ??
  20. Balanced input for JFet mic pre advice?
  21. price for opa 627. need help.
  22. DC Block for ADA
  23. hp filter ep2500
  24. Newb needs help eliminating hum/noise in simple mixer
  25. Help for Amplifier/buffer circuit design
  26. Mixing Centre channel into L & R
  27. using RG6QS cable for subwoofer line in
  28. Anyone running his ALeph P on battery power ?
  29. The Burr-Brown sound?
  30. My new Diy preamp, finally done.
  31. Newbie Preamp Question
  32. mono/stereo switch?
  33. Very long line level cables, what to use?
  34. First try on Preamp / NE5532
  35. The Synergy "Active" Crossover
  36. Constant Q parametric equalizers (SVF topology)
  37. Millet max as a preamp? schematics disclosed
  38. Building my own 10 Channel Preamp
  39. DIY Dodd Audio Buffer Kit
  40. SAE MK1B schematics??? anyone have them
  41. Simple and inexpensive Passive Balanced Attenuator possible?
  42. TEAC rx-9 dbx Unit
  43. problems with building a piezo preamp for undewater mic
  44. NJM4558L replacement
  45. Buffers in active xovers: opamps or tubes?
  46. ADI AD5292 as a log volume potentiometer
  47. Pre-Amp Fixed, Yet Not Sure Why
  48. Improving a "Disco mixer" to mid-fi performance
  49. Old analog desk EQ mod
  50. Wanted: Vestax PMC-17A Schematic
  51. Noise on unconnected preamp input
  52. Audio line DC offset
  53. Proper way to get mono?
  54. Valve pre amp/phono stage
  55. simple pre with offset problem
  56. Crown IC150A board layout
  57. Burr-Brown DRV134 AUDIO BALANCED LINE Receiver schematic PCB/Kit anybody?
  58. analogue VU-meter
  59. Quad 34 preamp tilt pot resistance ?
  60. What phono preamp circuit?
  61. Balance control R Values
  62. Help designing device to drain voltage?
  63. What Volume pot and selector?
  64. Pre Fader Listen Logic Switching
  65. linkwitz-riley 3way and 2way pcb kit??
  66. Which pre pcb build will suit me?
  67. Subsonic filter options
  68. Preamp Project
  69. Arcam AVP700 - turns off at random
  70. why there is a spike sound output from the speaker when turn off?
  71. Sowter-based TVC
  72. My unbalanced line mixer design needs something...
  73. Tube or SS Preamp?
  74. Marantz Consolette Schematic
  75. Is it possible to modify this mic preamp?
  76. LDR Switch?
  77. Tube preamp hum and noise.
  78. How to modify the preamp audio circuit ??
  79. Wiring Balanced Volume Pots?
  80. INA217 DRV134 Opamp bypass caps
  81. Capacitor Across Power Switch to Control Switch On Noise?
  82. Multi input (with phono) preamp kits?
  83. DIY Dancing Needle Box
  84. Phantom power INA217
  85. AV amps for use as crossovers and amps
  86. Basic Common Emitter Amp Help
  87. Minimalist Soft Start for 2sk170 Preamp
  88. INA217 Blocking capacitors
  89. Ina217-drv134
  90. The "Sound" of Electronics vs Transducers
  91. Ina217 drv134
  92. Mark Levinson No 28 capacitors
  93. Dummy load with output to power amp
  94. SRPP+ from Glass Ware needs some help please
  95. Guitar preamp envelope follower
  96. What's the Best input volage for TA2020?
  97. NOS user would appreciate review of PLLXO plans
  98. value of capacitors in signal path
  99. 15v dual power supply problem. need help
  100. Let's talk volume control alternatives?
  101. Lightspeed name change, any suggestions
  102. RJM Audio Gainbloc Preamplifier Mk. I
  103. Passive attenuation.
  104. Audio selector switch
  105. Adcom GFP-710 volume pot motor input voltage
  106. JDI Preamp Information Anyone?
  107. Mic preamp
  108. Electrocompaniet Preampliwire 1A Schematic
  109. P88 sound leakage
  110. How to DIY Attenuated Interconnects?
  111. Parasound P/LD-1500 schematics
  112. Passive preamp signal ground
  113. KENWOOD L-07 CII preamp
  114. PS for simple fet preamp
  115. My RF controled PGA2320 MiniVol and ch selector
  116. Meridian 501 Preamp Schematic
  117. LDR photoresistor attenuator preamp, in general
  118. JFET Mic Preamp Advice
  119. ACTIVE CROSSOVER: OPAM decision!
  120. LDR attenuator questions
  121. recommendations for commercial preamp
  122. Cheap Valve Preamp power supply?
  123. Difference Direct-, Normal- polarity
  124. ESP Project 94A, What am I doing wrong? (Simple Mixer)
  125. read out position of normal potentiometer
  126. Electrocompaniet Preampliwire 1
  127. Evaluate first preamp
  128. Kit Preamp for Sophia Electric Baby
  129. Pedja Rogic JFET or Nelson Pass B1?
  130. oAudio BASH 500w high-pass/boost filter schematics/sim here
  131. Yaquin MS12-B: sending signal to two amps?
  132. Carver Sonic Holography Schematic?
  133. LM1036 vs TDA1524 vs Other
  134. Cello Master Supply Parts Question
  135. Need a Baxandall 2way tonecontroll
  136. looking help to choice a preamp to build.
  137. Need volume control on active filter
  138. Seems like nobody is modding the Outlaw 990... true? why?
  139. Balanced line driver (DRV134) and noise
  140. Tube pre-amp for a vehicle?
  141. Can Someone help (Studiomaster mod)
  142. Hum with B&K MC-101 and Spectral MCR cartridge
  143. "...the best preamplifier ever made" says Mr. David Price, Hi-Fi- World
  144. The 2 Channel Audio Preamplifier - schematic
  145. Counterpoint SA-1000 buzzing problem
  146. Lightspeed Attenuator Sam Tellig Stereophile review
  147. AKAI PR-04A schematic
  148. Crossover PCBs?
  149. Which language for control software for pre
  150. B & O Penta Crossover Differences - experts required
  151. JFET mu follower phono or mic pre
  152. What is the best transformer type for TVC?
  153. impedance bridging problems
  154. Conrad Johnson PV-1 schematics
  155. 80 Watt class-b amp 'L6' Ver 5.0
  156. Adcom GFP-565 IC Part Numbers???
  157. "The Evil Sandman" Preamp
  158. NEUMANN 3-band equalizer
  159. Court Acoustics GE60 EQ wiring question
  160. Akikido LSA/HPA 9-Pin or Akikido Octal which one?
  161. Bypassing a 100uF output electroytic - which value?
  162. Preamp Noise
  163. Class AA Opamp Schematic
  164. 3-way active XO ... can amp input coupling caps be tailored for the frequency band?
  165. sound effects(echo,bass,repeat,trible)
  166. Aux send Circuit
  167. CD-4 (Quadro) LP-decoder/RIAA
  168. [PROJECT] 4 way crossover with signal detect
  169. Nad S100 pre-amp woes
  170. 50watt class-b amp mx50v6
  171. JLH Liniac Revisited
  172. Balanced mixer output?
  173. Digital XO vs Op-amp XO, which would be best to use in active speakers?
  174. DC powered active Xover w/ balanced outputs?
  175. Smartkit Preamp+psu
  176. DCX2496 into Quest 3004
  177. First ever DIYish Preamp/Remote Volume etc...
  178. NE5534AH pin out requested
  179. Crossover help
  180. Changing the std. opamp of active x-over
  181. Ca 640p
  182. Marchand Crossover Build Help
  183. Splitting Line Level Signal
  184. Multiple inputs for single output
  185. A-weighting
  186. Reckhorn F-1 and others; suggestions.
  187. Analog audio mixer Inkel pro mx-1200
  188. Sugden T48 tuner help
  189. 6ch. volume control + attenuator for DCX2496 on the cheap
  190. Star ground goes extreme
  191. High quality preamp
  192. Input Question
  193. Need Help From The Brainiacs :)
  194. Counterpoint SA5 Preamp Problem
  195. TUBEpre and Lightspeed LDR attenuator
  196. A treble boost line amp
  197. newbe need help with project
  198. Anyone built the phono pre from LM4562/LME49720 datasheet?
  199. pre amplifier build project
  200. Guitar - iPod - Heaqdphone amp
  201. samson s-3 way xover ?Anyone used?
  202. Need to make 3 line outs from 1
  203. Arduino based Input Selector for preamp
  204. Another Wrench In the Works... Inductive RIAA
  205. DIY Mobile Line Output Converter
  206. Trouble with roland ac-60!
  207. active vs passive time delay
  208. Dead Left Channel on my Kenwood CI Pre-amp
  209. Phono stage with NJM2068DD or TL071/072
  210. Trimmer pots for onboard guitar preamp tone controls?
  211. Passive Bandpass Filter
  212. Balanced "passive" crossover
  213. MAX5486- digi pot help!
  214. gain stages in dynacord mixer
  215. DRV134 pcb
  216. quick and dirty Mono Sum circuit
  217. Anybody interested in checking my PLLXO?
  218. Yet another Volume controlers and source selections
  219. Volume control
  220. low gain 12ax7 schematic
  221. Marantz HDAM Preamp DIY Kit on Ebay
  222. "Crazy" power for preamp
  223. ImPASSe -- transformer transplant
  224. Phono to Aux Conversion
  225. Easiest and fastest way to measure a crossover's transfer function?
  226. Help needed making an RCA Y cable
  227. Anyone heard a Leak 70 ss amp ?
  228. Meaning of an output's "load impedance"?
  229. Remove mid range boost EQ circuit?
  230. Oscilloscope BK precision 1477
  231. Help whit Ebay/diy zone regulator
  232. Stereoscope Leader
  233. HELP channel select on guitar amp
  234. Looking for service manual of mixer Aeq BC-2500
  235. DAC datasheet
  236. TL072 or NE5532 (or TL074) Which is best?
  237. Ready made graphs that can import data
  238. Rotel + BHC Aerovox 10000uF 63V... worthwhile change?
  239. ultra-low distortion audio oscillator
  240. Home made audio multiplexer (switch) using 4051 or 4052? (74HC...)???
  241. Cable lifts
  242. Question on passive preamplifier - transformer section.
  243. My very first PCB layout - INA217-based mic preamp was the victim
  244. Anyone using microphone cable in making their phono cable?
  245. About replacing the NJM-4559 by LM4562 in this circuit
  246. How to have a 48v+ on McCurdy preamp
  247. Repairing Class A/AB amp with Blown Fuse
  248. Accuphase C-27
  249. Dbx 146221 Ic
  250. Interconnects question.

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