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  1. Valve pre amp/phono stage
  2. simple pre with offset problem
  3. Crown IC150A board layout
  4. Burr-Brown DRV134 AUDIO BALANCED LINE Receiver schematic PCB/Kit anybody?
  5. analogue VU-meter
  6. Quad 34 preamp tilt pot resistance ?
  7. What phono preamp circuit?
  8. Balance control R Values
  9. Help designing device to drain voltage?
  10. What Volume pot and selector?
  11. Pre Fader Listen Logic Switching
  12. linkwitz-riley 3way and 2way pcb kit??
  13. Which pre pcb build will suit me?
  14. Subsonic filter options
  15. Preamp Project
  16. Arcam AVP700 - turns off at random
  17. why there is a spike sound output from the speaker when turn off?
  18. Sowter-based TVC
  19. My unbalanced line mixer design needs something...
  20. Tube or SS Preamp?
  21. Marantz Consolette Schematic
  22. Is it possible to modify this mic preamp?
  23. LDR Switch?
  24. Tube preamp hum and noise.
  25. How to modify the preamp audio circuit ??
  26. Wiring Balanced Volume Pots?
  27. INA217 DRV134 Opamp bypass caps
  28. Capacitor Across Power Switch to Control Switch On Noise?
  29. Multi input (with phono) preamp kits?
  30. DIY Dancing Needle Box
  31. Phantom power INA217
  32. AV amps for use as crossovers and amps
  33. Basic Common Emitter Amp Help
  34. Minimalist Soft Start for 2sk170 Preamp
  35. INA217 Blocking capacitors
  36. Ina217-drv134
  37. The "Sound" of Electronics vs Transducers
  38. Ina217 drv134
  39. Mark Levinson No 28 capacitors
  40. Dummy load with output to power amp
  41. SRPP+ from Glass Ware needs some help please
  42. Guitar preamp envelope follower
  43. What's the Best input volage for TA2020?
  44. NOS user would appreciate review of PLLXO plans
  45. value of capacitors in signal path
  46. 15v dual power supply problem. need help
  47. Let's talk volume control alternatives?
  48. Lightspeed name change, any suggestions
  49. RJM Audio Gainbloc Preamplifier Mk. I
  50. Passive attenuation.
  51. Audio selector switch
  52. Adcom GFP-710 volume pot motor input voltage
  53. JDI Preamp Information Anyone?
  54. Mic preamp
  55. Electrocompaniet Preampliwire 1A Schematic
  56. P88 sound leakage
  57. How to DIY Attenuated Interconnects?
  58. Parasound P/LD-1500 schematics
  59. Passive preamp signal ground
  60. KENWOOD L-07 CII preamp
  61. PS for simple fet preamp
  62. My RF controled PGA2320 MiniVol and ch selector
  63. Meridian 501 Preamp Schematic
  64. LDR photoresistor attenuator preamp, in general
  65. JFET Mic Preamp Advice
  66. ACTIVE CROSSOVER: OPAM decision!
  67. LDR attenuator questions
  68. recommendations for commercial preamp
  69. Cheap Valve Preamp power supply?
  70. 2N2222A phono preamp
  71. Difference Direct-, Normal- polarity
  72. ESP Project 94A, What am I doing wrong? (Simple Mixer)
  73. read out position of normal potentiometer
  74. Electrocompaniet Preampliwire 1
  75. Evaluate first preamp
  76. Kit Preamp for Sophia Electric Baby
  77. Pedja Rogic JFET or Nelson Pass B1?
  78. oAudio BASH 500w high-pass/boost filter schematics/sim here
  79. Yaquin MS12-B: sending signal to two amps?
  80. Carver Sonic Holography Schematic?
  81. LM1036 vs TDA1524 vs Other
  82. Cello Master Supply Parts Question
  83. Need a Baxandall 2way tonecontroll
  84. looking help to choice a preamp to build.
  85. Need volume control on active filter
  86. Seems like nobody is modding the Outlaw 990... true? why?
  87. Balanced line driver (DRV134) and noise
  88. Tube pre-amp for a vehicle?
  89. Can Someone help (Studiomaster mod)
  90. Hum with B&K MC-101 and Spectral MCR cartridge
  91. "...the best preamplifier ever made" says Mr. David Price, Hi-Fi- World
  92. The 2 Channel Audio Preamplifier - schematic
  93. Counterpoint SA-1000 buzzing problem
  94. Lightspeed Attenuator Sam Tellig Stereophile review
  95. AKAI PR-04A schematic
  96. Crossover PCBs?
  97. Which language for control software for pre
  98. B & O Penta Crossover Differences - experts required
  99. JFET mu follower phono or mic pre
  100. What is the best transformer type for TVC?
  101. impedance bridging problems
  102. Conrad Johnson PV-1 schematics
  103. 80 Watt class-b amp 'L6' Ver 5.0
  104. Adcom GFP-565 IC Part Numbers???
  105. "The Evil Sandman" Preamp
  106. NEUMANN 3-band equalizer
  107. Court Acoustics GE60 EQ wiring question
  108. Akikido LSA/HPA 9-Pin or Akikido Octal which one?
  109. Bypassing a 100uF output electroytic - which value?
  110. Preamp Noise
  111. Class AA Opamp Schematic
  112. 3-way active XO ... can amp input coupling caps be tailored for the frequency band?
  113. sound effects(echo,bass,repeat,trible)
  114. Aux send Circuit
  115. CD-4 (Quadro) LP-decoder/RIAA
  116. [PROJECT] 4 way crossover with signal detect
  117. Nad S100 pre-amp woes
  118. 50watt class-b amp mx50v6
  119. JLH Liniac Revisited
  120. Balanced mixer output?
  121. Digital XO vs Op-amp XO, which would be best to use in active speakers?
  122. DC powered active Xover w/ balanced outputs?
  123. Smartkit Preamp+psu
  124. DCX2496 into Quest 3004
  125. First ever DIYish Preamp/Remote Volume etc...
  126. NE5534AH pin out requested
  127. Crossover help
  128. Changing the std. opamp of active x-over
  129. Ca 640p
  130. Marchand Crossover Build Help
  131. Splitting Line Level Signal
  132. Multiple inputs for single output
  133. A-weighting
  134. Reckhorn F-1 and others; suggestions.
  135. Analog audio mixer Inkel pro mx-1200
  136. Sugden T48 tuner help
  137. 6ch. volume control + attenuator for DCX2496 on the cheap
  138. Star ground goes extreme
  139. High quality preamp
  140. Behringer DCX - need to do something to it
  141. Input Question
  142. Need Help From The Brainiacs :)
  143. Counterpoint SA5 Preamp Problem
  144. TUBEpre and Lightspeed LDR attenuator
  145. A treble boost line amp
  146. newbe need help with project
  147. Anyone built the phono pre from LM4562/LME49720 datasheet?
  148. pre amplifier build project
  149. Guitar - iPod - Heaqdphone amp
  150. samson s-3 way xover ?Anyone used?
  151. Need to make 3 line outs from 1
  152. Arduino based Input Selector for preamp
  153. Another Wrench In the Works... Inductive RIAA
  154. DIY Mobile Line Output Converter
  155. Trouble with roland ac-60!
  156. active vs passive time delay
  157. Dead Left Channel on my Kenwood CI Pre-amp
  158. Phono stage with NJM2068DD or TL071/072
  159. Trimmer pots for onboard guitar preamp tone controls?
  160. Passive Bandpass Filter
  161. Balanced "passive" crossover
  162. MAX5486- digi pot help!
  163. gain stages in dynacord mixer
  164. DRV134 pcb
  165. quick and dirty Mono Sum circuit
  166. Anybody interested in checking my PLLXO?
  167. Yet another Volume controlers and source selections
  168. Volume control
  169. low gain 12ax7 schematic
  170. Marantz HDAM Preamp DIY Kit on Ebay
  171. "Crazy" power for preamp
  172. ImPASSe -- transformer transplant
  173. Phono to Aux Conversion
  174. Easiest and fastest way to measure a crossover's transfer function?
  175. Help needed making an RCA Y cable
  176. Anyone heard a Leak 70 ss amp ?
  177. John Curl's Blowtorch preamplifier part II
  178. Meaning of an output's "load impedance"?
  179. Remove mid range boost EQ circuit?
  180. Oscilloscope BK precision 1477
  181. Help whit Ebay/diy zone regulator
  182. Stereoscope Leader
  183. HELP channel select on guitar amp
  184. Looking for service manual of mixer Aeq BC-2500
  185. DAC datasheet
  186. TL072 or NE5532 (or TL074) Which is best?
  187. Ready made graphs that can import data
  188. Rotel + BHC Aerovox 10000uF 63V... worthwhile change?
  189. ultra-low distortion audio oscillator
  190. Home made audio multiplexer (switch) using 4051 or 4052? (74HC...)???
  191. Cable lifts
  192. Question on passive preamplifier - transformer section.
  193. My very first PCB layout - INA217-based mic preamp was the victim
  194. Anyone using microphone cable in making their phono cable?
  195. About replacing the NJM-4559 by LM4562 in this circuit
  196. How to have a 48v+ on McCurdy preamp
  197. Repairing Class A/AB amp with Blown Fuse
  198. Accuphase C-27
  199. Dbx 146221 Ic
  200. Interconnects question.
  201. switch noise
  202. Which Op-Amp? (Afraid to ask really...)
  203. Few questions about Linkwitz' mic amp circuit
  204. Rotel RC-850 Pre Amp + Rotel RB-870BX
  205. active filter 'without' opamps
  206. newbie non solder mods?
  207. Need suggestion for tube MC pre-pre
  208. Schematic needed for Pioneer PL880
  209. obbligato's with vitamin q as bypass
  210. My firtst tube amp
  211. Where to find RF remote stepped attenuator?
  212. Crashing Sound
  213. Exposure 2010 phono board OPamp?
  214. rc4558p replacements?
  215. help with passive line level crossover PLLXO for 33K impedance amps
  216. Jensen JT-11P-1 Line Input Transformer
  217. DIY phono to replace roksan phono stage
  218. Poor Serbian Man Optical Volume Control
  219. line level high pass filter
  220. Mechanic hum
  221. Filters - adjustable gain
  222. Power transformer design paper
  223. How to build a simple balanced mono line mixer
  224. Phono Stage...
  225. Importance of quality resistors ?????
  226. Low-V simple phono stage + tube buffer
  227. output standard?
  228. Suggestions on a VCA and amp
  229. Mains toroid as MC step up?
  230. Juicy Music Tercel
  231. IC wiring (ignoring the materials used and hopefully too long a thread)
  232. 2 sources into 1 Stereo
  233. tube box I service manual
  234. DIY tube phono preamp ?
  235. where do I begin to build an eq?
  236. how to? simple wow/flutter measurement
  237. Electrolityc Capacitors Footprints
  238. Choke, filter for white noise
  239. What type cable to use for double shielded driven guard?
  240. HQ Balanced Phono Preamplifier for MC Cartridges using OPA2604
  241. Linear voltage regulator: how to make good use of "sense" and "ground sense"?
  242. High frequency high voltage oscillator - help!
  243. Re-wiring to balanced (tonearm)
  244. Stepped Attenuator giving unexpected behavior
  245. Convert RCA box to XLR (phono)
  246. Simple phono stage (MC)
  247. simulating parallel netfilter
  248. AGC in FM tuners ?
  249. Balanced XLR source RIAA
  250. new phono stage or old preamp with phono?