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  1. Preamp improvements/suggestions
  2. Cascaded Notch filters
  3. Please help: building a notch filter
  4. Help me replacing a (they dont have that) op ic
  5. Improved LDR Volume Control
  6. Mods Xiang Sheng 728A
  7. Ultra-fine level setting
  8. line volume knob
  9. Behringer CX2310 Toroid wiring
  10. Richard Fordham 5.1 Volume Control
  11. INA217 mic preamp critique and questions
  12. Modular Balanced Preamp
  13. Primare i21 broken, no sound
  14. Jfet Preamp Calculator
  15. Use of ferrite beads / core on screened cables
  16. Tube Nube! Where to start,,
  17. [Help] Vintage preamp worth to buy ?
  18. HI-FI Magazine Pre-amp
  19. Basic attenuator question
  20. Jfet folded cascode with diamond buffer opamp
  21. Impedance matching LoZ source HiZ inputs
  22. Gain stage for SS phono
  23. Measuring platter speed.
  24. Budget "passive preamp"
  25. Sansui SP-220 Tube Preamp
  26. Preamp for Piezo cello bridge
  27. Mixer Section explanation help needed.
  28. What is a good 1st order Good Band pass?
  29. Preamp: Comparing LDR and buffered LDR
  30. BTL to Balanced Conversion
  31. REGA CURSA CIRCUIT
  32. Questios about designing with opamps
  33. Preamp from Velodyne HGS line
  34. Using PGA23XX with dac with dc offset
  35. Instrumentation Amp: Input Resistors?
  36. Mic pre amp Problem
  37. please help me
  38. Output transformer in reverse to drive a piezo disk
  39. add a volume control to a dac with dc offset
  40. How to switch phantom power?
  41. zoe tsang simple opamp preamp/buffer kit on ebay
  42. Impedance of parallel transformers
  43. External tunable X-Over
  44. sound of discrete opamps
  45. Big Dumb Input Selector
  46. DIY Line preamp sugestions, 10meter cables
  47. which tube preamp kit for newbie
  48. EQ Circuit before or after crossover circuit ??
  49. Schematic needed panasonic RX-1230 schematic
  50. Passive 16 channel summing mixer
  51. schematic needed: 3 band equaliser + gain stage
  52. Quick question on pots for guitar pre
  53. Counterpoint SA5 Phono Channel Out... Help!
  54. Help with Op Amp outamp
  55. Discrete dual-opamp DIP08 module (jcx topology)
  56. Preamp disappointment and passive mod???
  57. Need help with volume control
  58. Solid State Pre Amp with Tube Amp - Pointless?
  59. Touch-sense/remote active/passive preamp
  60. Summing Mixer and Headphone amp...
  61. Linkwitz-Riley low pass, strange distortion?
  62. Cauer / Elliptic Filter design program
  63. do I need vintage preamp?
  64. Optical Attenuator on the Cheap
  65. CDP output enough for line-level active crossover?
  66. Replacing Samson S 3-way Xover Op amps
  67. Any Semi Manufacturers Better Than Others?
  68. Help me to Build Tube Preamp with Phono
  69. Need audio input indicator
  70. Where do I put the subwoofer volume control potentiometer?
  71. XLR to RCA I/O with Aleph Pre, Acurs Amp, X-OVR and Nak Dragon
  72. microphone echo & delay fx circuit
  73. 3 band eq using jfet transistors
  74. compenstation cap for 2nd order allpass delay circuit
  75. Recommend a DIY pre-amp for use with Hypex UCD modules
  76. Just passing my PLXXO and trafo design by the experts :)
  77. Line stage cap recommendations
  78. AGC automatic gain controler
  79. High quality capacitors for crossovers?
  80. Organizing Components for Low Noise?
  81. fender tmb circuit
  82. 3 band eq
  83. Is This Preamp Okay?
  84. Need a preamp for my sub
  85. Cello Audio Palette
  86. Questions on xover and preamps.
  87. INA134, balanced an unbalanced, normal phase and inverted phase
  88. Help! needed a mic preamp for amplifier
  89. Passive Preamp - Grounding plan
  90. +/- 0.3V bumps on my ground
  91. Yet another preamp...
  92. Active Filter, Delay, and LT circuit board
  93. does anyone have a schematic and pcb layout for 3 band bass onboard eq?
  94. Carver C-1 Preamp Output Voltage Issue
  95. Adding bands to an equalizer circuit?
  96. transformer attenuator directly from v-out dac
  97. Looking for a better OP-Amp to replace a UTC TDA2822L
  98. Hafler DH-101 Pre-Amp
  99. Moog parametric EQ - proper pots?
  100. pga2310 output resistors
  101. HELP with Kaneda line stage PSU
  102. source/ speaker selector
  103. Stepped attenuator - getting the impedance right
  104. Volume control bent(slight) parasound PHP-850
  105. connect IR receiver
  106. High cap ceramic capacitors.... how they "sound"
  107. LED peak level indicator
  108. Balanced Matrix Mixer Question!
  109. Where shall I place the potentiometer?
  110. Preamp to go with an Arcam Delta290 power - do i need active, or will passive be ok?
  111. Is This Possible? Am I Crazy?
  112. Sony TA-E88b ?????
  113. coda pre-01 help fix?
  114. Need a 1 meg input pre stage-?!
  115. Balanced Line driver help.. noisy
  116. 6-band graphic eq project component substitutions / improvements
  117. 1176 compressor output transformer alternative
  118. Help-AC input connected directly to case!
  119. different gain levels and a PLLXO´s impedance
  120. Thorens restec V1 preamplifier
  121. Signal-Powered Compressor?
  122. simplest, purest mixer
  123. Ideas to improve this microphone preamp?
  124. Preamplifier from Lineup & Fotios for fun
  125. MM cartridge capacitance loading
  126. Volume Equilizer
  127. Wanted: Melos 110B schematics
  128. Can 555 circuit supply enough neg voltage
  129. amplifier works connected to PC .. but not when connected to car radio
  130. DIY a preamp
  131. Dynaco PAS Preamp - Complete Rebuild
  132. Subwoofer filter problem - Please help me
  133. Remote control receiver - help
  134. High end preamp kit
  135. Output tranny for 6080 tube
  136. Need to convert a Linar preamp from 220V to 120V
  137. help with interfacing microcontroller to pga volume chip
  138. Carbon pot vs digital pot
  139. Amplitude Errors in the Summed Response of Audio Crossover Filters
  140. Mixer/Amplifier
  141. Help upgrading opamps!
  142. EAD theatermaster 8800 problem
  143. Arduino controled PGA2310 Preamp
  144. Lightspeed clone, BOM
  145. Passive Line Splitter
  146. Resistor wattage for stepped attenuator
  147. Emitter bypass caps in a CE stage
  148. Wanted: Zero feedback 2-10x gain line stage...prefer symmetrical
  149. Cheap Valve Kits (such as this one)... Are they worth the effort?
  150. Need help with Adcom gcd-575
  151. Subwoofer channel mix + crossover
  152. Digital volume control from audiomodule
  153. audio mono preamplifier schematic needed
  154. 8 channel touch sense/remote volume controll
  155. Help with Hum - Hum Help - Aikido
  156. Denon 3808 Schematic
  157. 24 input/24 output mixer
  158. new idea (for me): dual first order building block PCB
  159. Op amps help! 3x3 12v matrix mixer
  160. Project: Stepped attenuator. 35 steps!
  161. Fixing a Kenwood 700c preamplifier - help please!
  162. Looking for help to put together Oracle tt and Graham arm
  163. Vintage Audire Diffet 2 preamp help
  164. This guy has a circuit tattoed on his arm
  165. DC servo and gain stage board with output zobel
  166. class A Line level buffer
  167. Blue tooth headset used for wireless
  168. Looking for: wireless remote control of volume/balanceH
  169. Very noisy pre-amp outputs.
  170. I need a line level splitter and don't want to spend $50+ on a transformer
  171. reusing a 3-way crossover
  172. Is this Design practicable?
  173. Mis-behaving crossover/preamp
  174. Low distortion & noise digitally controlled volume chip
  175. Passive (active) preamplifier with selector (motorized ALPS, IR)
  176. How to add an extra set of RCA outputs
  177. line level unbalanced to balanced converter
  178. Balanced output confusion
  179. Why do i need a preamp?
  180. Shelving 2nd order high-pass?
  181. Listening for the best attenuator load for direct out AKM and CS dac chips
  182. Sylonex and Arduino preamp
  183. ACTIVE loudness control
  184. CJ PV-15 Pre
  185. Schematic wanted/LINN KAIRN PRO
  186. Have I ruined my V&L systems EC3 -vintage- active crossover??
  187. Mic Preamp + Sunt Regulator a la E. Borbely
  188. +-70v and opamps
  189. NE5532 preamp works only in mono
  190. Velleman K8084 pre-amp kit question
  191. Quick mixer question
  192. Heybrook C3 & P3, power conversion, help/info.
  193. Problem - Line level splitter
  194. Schematic wanted
  195. JFET/MOSFET complementary-differential preamplifier
  196. Active Croosover PAss labs
  197. Class A op amp circuits with balanced i/o
  198. Offset Nulling for BUF03 Buffer
  199. Nakamichi CA-5 Stereo Pre and major hum
  200. Lcd bargraph
  201. help! Exploding diy remote control volume board!
  202. tilt eq schematic check
  203. AMB LABS A20 Discrete
  204. 10band equalizer
  205. Input selector, automatic
  206. Help making a circuit
  207. Looking for Krell KRC-3 preamp schematics
  208. Long cable query
  209. Newbie. What AM I trying to find/build?
  210. http://www.diyaudio.com/forums/analog-line-level/181105-mezmerize-build.html#post2432
  211. preamp - at the most basic level
  212. LED VU meter using existing bar graph
  213. MOX Active Crossover II Gain Adjustment
  214. Help with a JC2
  215. Hong Kong Fakes
  216. Does the cable impedance matter when making audio level measurements?
  217. rolling of bass before amp
  218. Cheap volume control chip
  219. HQ Preamp - Elector scheme or other suggestion
  220. Three Pair Cable
  221. tube preamp mod for bass bypass to ss power IN?
  222. Adcom GFP-715
  223. DIY line-level interconnects
  224. Measuring impedance of Pot/attenuator
  225. Question about shielded wire...
  226. Subwoofer filter
  227. Mono to Dual Channel convert
  228. Input selector (like Quad)
  229. Germanium transistors for a preamplifier
  230. the hat-trick volume control ;)
  231. Balanced LDR preamp
  232. Multichannel volume control
  233. The design of active crossovers- Douglas Self wants your opinions
  234. newb looking for preamp design and a few questions answered
  235. Voltage Controlled Switch
  236. osufishman stereo line level to mono
  237. Poor TV audio S/N
  238. Need help with mic preamp
  239. Ideas for a simple passive band-stop filter?
  240. Wiring a 10k fader pot?
  241. variable frequency tilt/shelf filter - bad idea?
  242. 47 Laboratory started selling kits
  243. Douglas Self's Active Crossovers book
  244. New Line Pre-Amp taking Shape
  245. Managing multiple inputs & master level...
  246. AR-XA woes...
  247. Help!! LM317T Filament Heater Problem
  248. Fully Balanced Input/Output
  249. mccormack micro phono drive
  250. Differential buffer without feedback?

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