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  1. MARK LEVINSON ML-10
  2. "Reverse" Linkwitz Transform
  3. Active crossover for subwoofer
  4. 2 way crossover build (diy first timer)
  5. The joys of Transformer Volume Control maintenance - 23 pole switch replacement
  6. Current feedback composite amplifiers
  7. Ovation Line Pre-Amp
  8. Amplifier XO simulation in WinISD
  9. Phase inverting / not inverting preamplifier
  10. Help a Newb add preamps to his receiver.
  11. DS1802 and CD4052 mux problems
  12. Preamp kit $150-$300
  13. help modifying my Phono-stage
  14. what are you thoughts on zstage from decware?
  15. Help needed with Paul Hynes VCCS
  16. Diy line mixer
  17. help pls...about crossover watts
  18. Problem with DS1802 digital volume control IC
  19. How much overhead is required
  20. multiple feedback low pass filter question
  21. Pre-amp transistor based for dynamic mic
  22. Basic pre-amp for DMX controller
  23. Recapping Linn Linto
  24. Lightspeed Attenuator needs a buffer??? Try these.
  25. anyone modded their musical fidelity V-LPS?
  26. Low audio frequency cutoff filter
  27. Not thrilled with sound of 4562 in active xovers
  28. Tube preamp diy kit
  29. Can somebody please check over my crossover
  30. No Name Pre
  31. Can I do that subs 12ax7 with 12at7
  32. Notch Filter
  33. Swapping Op-Amps... you have checked to see it's stable haven't you ?
  34. wiring input for 4 ch 41hz amp9b
  35. Q_Dispre
  36. Volume & selector controller with 5x7 dotmatrix display for tube/transistor amplifier
  37. why would +ve regulator output -ve voltage? ?
  38. suhr preamp
  39. DIY mixer first project
  40. what is R and C in series to ground?
  41. E.C Audio Finestra Preamp
  42. converting passive xo to line level passive OR salen key? any advice?
  43. Slow ramp up/fast ramp down 48V phantom power (circuit design)
  44. Mic Preamp Buffer
  45. Rotel RC 970 BX MK II - Service Manual
  46. Help needed for tone control circuit
  47. Descrete jFET versus IC op-amp quality
  48. A New approach of Volume Control: AAVA (Accuphase Analog Vari-gain Amplifier)
  49. 8-way (remote) volume control
  50. Remote Controlled (RC) Volume Control Kits - Overview wanted
  51. what causes a big soundstage (audio research)
  52. Passive low-pass passive for line input - 2nd part
  53. Alpine ERE-G180 and G190 schematics
  54. Riaa capacitor voltage ratings
  55. THAT 1510/1512 op-amps
  56. Quality line attenuator?
  57. Passive low-pass passive for line input
  58. Yamaha C-65
  59. Preamp A - 15 : Mark Levinson No. 20.5 Derived
  60. 12az7a phono stage-12ay7a line stage
  61. Relays for ESP P125 (4-way LR crossover board)
  62. 3 band eq with paramertic
  63. tetra phono stage values
  64. Preamp improvements/suggestions
  65. Cascaded Notch filters
  66. Please help: building a notch filter
  67. Help me replacing a (they dont have that) op ic
  68. Improved LDR Volume Control
  69. Mods Xiang Sheng 728A
  70. Ultra-fine level setting
  71. line volume knob
  72. Behringer CX2310 Toroid wiring
  73. Richard Fordham 5.1 Volume Control
  74. INA217 mic preamp critique and questions
  75. Modular Balanced Preamp
  76. Primare i21 broken, no sound
  77. Jfet Preamp Calculator
  78. Use of ferrite beads / core on screened cables
  79. Tube Nube! Where to start,,
  80. [Help] Vintage preamp worth to buy ?
  81. HI-FI Magazine Pre-amp
  82. Basic attenuator question
  83. Jfet folded cascode with diamond buffer opamp
  84. Impedance matching LoZ source HiZ inputs
  85. Gain stage for SS phono
  86. Measuring platter speed.
  87. Budget "passive preamp"
  88. Sansui SP-220 Tube Preamp
  89. Preamp for Piezo cello bridge
  90. Mixer Section explanation help needed.
  91. What is a good 1st order Good Band pass?
  92. Preamp: Comparing LDR and buffered LDR
  93. BTL to Balanced Conversion
  94. REGA CURSA CIRCUIT
  95. Questios about designing with opamps
  96. Preamp from Velodyne HGS line
  97. Using PGA23XX with dac with dc offset
  98. Instrumentation Amp: Input Resistors?
  99. Mic pre amp Problem
  100. please help me
  101. Output transformer in reverse to drive a piezo disk
  102. add a volume control to a dac with dc offset
  103. How to switch phantom power?
  104. zoe tsang simple opamp preamp/buffer kit on ebay
  105. Impedance of parallel transformers
  106. External tunable X-Over
  107. sound of discrete opamps
  108. Big Dumb Input Selector
  109. DIY Line preamp sugestions, 10meter cables
  110. which tube preamp kit for newbie
  111. EQ Circuit before or after crossover circuit ??
  112. Schematic needed panasonic RX-1230 schematic
  113. Passive 16 channel summing mixer
  114. schematic needed: 3 band equaliser + gain stage
  115. Quick question on pots for guitar pre
  116. Counterpoint SA5 Phono Channel Out... Help!
  117. Help with Op Amp outamp
  118. Discrete dual-opamp DIP08 module (jcx topology)
  119. Preamp disappointment and passive mod???
  120. Need help with volume control
  121. Solid State Pre Amp with Tube Amp - Pointless?
  122. Touch-sense/remote active/passive preamp
  123. Summing Mixer and Headphone amp...
  124. Linkwitz-Riley low pass, strange distortion?
  125. Cauer / Elliptic Filter design program
  126. do I need vintage preamp?
  127. Optical Attenuator on the Cheap
  128. CDP output enough for line-level active crossover?
  129. Replacing Samson S 3-way Xover Op amps
  130. Any Semi Manufacturers Better Than Others?
  131. Help me to Build Tube Preamp with Phono
  132. Need audio input indicator
  133. Where do I put the subwoofer volume control potentiometer?
  134. XLR to RCA I/O with Aleph Pre, Acurs Amp, X-OVR and Nak Dragon
  135. microphone echo & delay fx circuit
  136. 3 band eq using jfet transistors
  137. compenstation cap for 2nd order allpass delay circuit
  138. Recommend a DIY pre-amp for use with Hypex UCD modules
  139. Just passing my PLXXO and trafo design by the experts :)
  140. Line stage cap recommendations
  141. AGC automatic gain controler
  142. High quality capacitors for crossovers?
  143. Organizing Components for Low Noise?
  144. fender tmb circuit
  145. 3 band eq
  146. Is This Preamp Okay?
  147. Need a preamp for my sub
  148. Cello Audio Palette
  149. Questions on xover and preamps.
  150. INA134, balanced an unbalanced, normal phase and inverted phase
  151. Help! needed a mic preamp for amplifier
  152. Passive Preamp - Grounding plan
  153. +/- 0.3V bumps on my ground
  154. Yet another preamp...
  155. Active Filter, Delay, and LT circuit board
  156. does anyone have a schematic and pcb layout for 3 band bass onboard eq?
  157. Carver C-1 Preamp Output Voltage Issue
  158. Adding bands to an equalizer circuit?
  159. transformer attenuator directly from v-out dac
  160. Looking for a better OP-Amp to replace a UTC TDA2822L
  161. Hafler DH-101 Pre-Amp
  162. Moog parametric EQ - proper pots?
  163. pga2310 output resistors
  164. HELP with Kaneda line stage PSU
  165. source/ speaker selector
  166. Stepped attenuator - getting the impedance right
  167. Volume control bent(slight) parasound PHP-850
  168. connect IR receiver
  169. High cap ceramic capacitors.... how they "sound"
  170. LED peak level indicator
  171. Balanced Matrix Mixer Question!
  172. Where shall I place the potentiometer?
  173. Preamp to go with an Arcam Delta290 power - do i need active, or will passive be ok?
  174. Is This Possible? Am I Crazy?
  175. Sony TA-E88b ?????
  176. coda pre-01 help fix?
  177. Need a 1 meg input pre stage-?!
  178. Balanced Line driver help.. noisy
  179. 6-band graphic eq project component substitutions / improvements
  180. 1176 compressor output transformer alternative
  181. Help-AC input connected directly to case!
  182. different gain levels and a PLLXO´s impedance
  183. Thorens restec V1 preamplifier
  184. Signal-Powered Compressor?
  185. simplest, purest mixer
  186. Ideas to improve this microphone preamp?
  187. Preamplifier from Lineup & Fotios for fun
  188. MM cartridge capacitance loading
  189. Volume Equilizer
  190. Wanted: Melos 110B schematics
  191. Can 555 circuit supply enough neg voltage
  192. amplifier works connected to PC .. but not when connected to car radio
  193. DIY a preamp
  194. Dynaco PAS Preamp - Complete Rebuild
  195. Subwoofer filter problem - Please help me
  196. Remote control receiver - help
  197. High end preamp kit
  198. Output tranny for 6080 tube
  199. Need to convert a Linar preamp from 220V to 120V
  200. help with interfacing microcontroller to pga volume chip
  201. Carbon pot vs digital pot
  202. Amplitude Errors in the Summed Response of Audio Crossover Filters
  203. Mixer/Amplifier
  204. Help upgrading opamps!
  205. EAD theatermaster 8800 problem
  206. Arduino controled PGA2310 Preamp
  207. Lightspeed clone, BOM
  208. Passive Line Splitter
  209. Resistor wattage for stepped attenuator
  210. Emitter bypass caps in a CE stage
  211. Wanted: Zero feedback 2-10x gain line stage...prefer symmetrical
  212. Cheap Valve Kits (such as this one)... Are they worth the effort?
  213. Need help with Adcom gcd-575
  214. Subwoofer channel mix + crossover
  215. Digital volume control from audiomodule
  216. audio mono preamplifier schematic needed
  217. 8 channel touch sense/remote volume controll
  218. Help with Hum - Hum Help - Aikido
  219. Denon 3808 Schematic
  220. 24 input/24 output mixer
  221. new idea (for me): dual first order building block PCB
  222. Op amps help! 3x3 12v matrix mixer
  223. Project: Stepped attenuator. 35 steps!
  224. Fixing a Kenwood 700c preamplifier - help please!
  225. Looking for help to put together Oracle tt and Graham arm
  226. Vintage Audire Diffet 2 preamp help
  227. This guy has a circuit tattoed on his arm
  228. DC servo and gain stage board with output zobel
  229. class A Line level buffer
  230. Blue tooth headset used for wireless
  231. Looking for: wireless remote control of volume/balanceH
  232. Very noisy pre-amp outputs.
  233. I need a line level splitter and don't want to spend $50+ on a transformer
  234. reusing a 3-way crossover
  235. Is this Design practicable?
  236. Mis-behaving crossover/preamp
  237. Low distortion & noise digitally controlled volume chip
  238. Passive (active) preamplifier with selector (motorized ALPS, IR)
  239. How to add an extra set of RCA outputs
  240. line level unbalanced to balanced converter
  241. Balanced output confusion
  242. Why do i need a preamp?
  243. Shelving 2nd order high-pass?
  244. Listening for the best attenuator load for direct out AKM and CS dac chips
  245. Sylonex and Arduino preamp
  246. ACTIVE loudness control
  247. CJ PV-15 Pre
  248. Schematic wanted/LINN KAIRN PRO
  249. Have I ruined my V&L systems EC3 -vintage- active crossover??
  250. Mic Preamp + Sunt Regulator a la E. Borbely

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