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  1. how to add protection circuits (swith circuit)
  2. resistor(s) in ground paths to reduce hum, etc.
  3. My (quick and dirty) take at a PLLXO for OB, help is welcome
  4. Lundahl LL1530 - audio application?
  5. SP-6 Light with ECC801S
  6. Active crossover help
  7. Line Level Preamp, Using JFETs, in a can.
  8. Replacement push buttons for hafler?
  9. My fuzz pedal project is behaving badly
  10. My fuzz pedal project is behaving badly
  11. Op-amp Upgrade
  12. Output transformers for Line-level signal.
  13. PGA2310 control module
  14. Shields in internally balanced equipment
  15. First effort: MM/MC phono preamp with DC servo
  16. How to figure gyrator treble boost gain
  17. AirTight ATC-2 Preamp Pictures
  18. Need help with the NE5543N opamp
  19. help building a crossover/lowpass filter
  20. Poles and throws?
  21. DC buildup in Linkwitz Transform
  22. BOZ (bride of Zen) advices asked - things to do/avoid
  23. DIY STEREO MIC-PREAMP for DSLR-Video
  24. Adjustable Linkwitz-Riley filter: Help needed with SPICE
  25. Variable active high pass filter .
  26. What advantage to use OP to summing signal ?
  27. Transformer malfunction??'
  28. Fader Penny Giles and Active Level control
  29. Is this filtering really needed ?
  30. Need help with ebay PHONO TURNTABLE PREAMP PREAMPLIFIER PCB DIY KIT
  31. Balanced vs Unbalanced -Basics
  32. Humorous mistake in Douglas Self Active Crossovers book
  33. preamp and tone control circuit with pcb
  34. Noisy 'clickless' analogue switches
  35. Preamp needed, or am I missing something?
  36. Volume Control Clicks
  37. Audio Research SP-10 Clone HELP please
  38. Selector switch
  39. repairing/recycling RCA cable
  40. Klimo Merlin rebuilding
  41. Analog Signal to fire Contact Closure
  42. Cello Palette Style EQ Design (was High End Tone Control)...
  43. LDR attenuators - Better balance with DC bias
  44. Acoustic Guitar Pre/Comp/EQ/Blender/DI
  45. Where is the point of diminishing returns with caps in passive crossovers?
  46. Preamp output protection
  47. Lexicon Master Re-boot?
  48. Grounding in balanced passive pre?
  49. Preamp knob where to buy...
  50. Transcendent Sound GG help
  51. Signal level
  52. Advice on a simple preamp
  53. Balanced and Unbalanced signals in a Control Room Monitor
  54. Audio Delay Circuit
  55. Shielded Umbilical Question
  56. TEAC 80-8 head spec
  57. DC on Lightspeed-attenuator possible
  58. DC on Lightspeed-attenuator possible
  59. Light Dependant Resistor Current Control
  60. Broskie Unbalancer - manual query?
  61. Op-amp Guilt feel.
  62. simple active crossover
  63. Attenuation Versus Gain
  64. fake signal to bypassed inserts
  65. How to Mult (aka split) a line signal into 8 identical buffered outputs... properly!
  66. Mic preamp
  67. Silicon Chip Pre-amp not switching inputs
  68. Making a very simple volume control
  69. consumer --- > commercial
  70. Need advice isolating subwoofer channel from main L/R channels.
  71. What type of diode should i use in this circuit?
  72. Plz advise on balanced pot wiring
  73. Protecting my amp during circuit tests
  74. Pre amp output shorted?
  75. 4 channel mixer circuit?
  76. Wiring a Pot
  77. How to make a phase inverter?
  78. line level volume control
  79. Equalizer
  80. RL passive high pass line level filter
  81. Denon D-75 & diy plinth
  82. Many questions on mhennessy's Hi-Fi preamp (mainly about power-fail detect circuit)
  83. LF03 discrete opamp
  84. passive line level filter question
  85. DIC Integrated amplifier - seventies
  86. Sound Quality on Unity gain opamp
  87. PGA2310 Line Preamplifier + Free Software
  88. Remotely Controlled Motorized Volume Pot.
  89. Preamp Kit - New DIY'er
  90. Pre-Amp Mods - Suggestions
  91. why not use quarter inch stereo jacks for connecting hifi
  92. BSG Technologies QOL "Signal Completion Stage"
  93. What is the best use of 12AT7?
  94. Popping noise on input selector switch
  95. 3 TRS in, 3 TRS out, 1 knob volume.
  96. Fostex Volume Control "PC1EX" - Schematic wanted
  97. Schematic Focusrite Octopre??
  98. multichannel volume control
  99. JC-80 eBay PCBs & Power Train
  100. Parametric EQ values?
  101. Recommend a first diy phono pre-amp?
  102. Phono problems one side working
  103. TL071 question
  104. Forte F44 preamp, DC Voltage leak
  105. To build a high pass RL line level filter
  106. If You Don't Have a SIT, Fake It...
  107. 3 core audio cable
  108. Another Remote Alps
  109. matching sine wave wave file / expert opinion
  110. Can a delay circuit be beneficial between bass and mids?
  111. Exponential programmable resistor
  112. Balanced interconnect with 2 x 75 ohm coax cables?
  113. Volume Control Kit/Controller to work with WMCE-remotes
  114. cs3318 and arduino
  115. Anyone knows if Khozmo guy is still around
  116. What kind of connector is this and how can it be fixed?
  117. "8 ohm 3 way x-over" mod for 4ohm woofer ?
  118. 6SN7 Tube pre
  119. 2 channel to 7.1
  120. Pass Aleph L1.2
  121. Chinese mini VU Meters
  122. Three opamp 24db/oct crossover?
  123. Parametric EQ for subwoofer?
  124. Kit or Behringer ?
  125. Redesigning a cheap obsolete 8-track pre-amp.
  126. Help with circuit for preamp with eq and balanced output powered by phantom power
  127. Inexspensive volume control chips
  128. Linkwitz ASP Custom Build
  129. Shielded cable or faraday cage or both?
  130. Upgraded opamp in preamp and now there is a hum/buzz
  131. GFP-555
  132. mic tube preamp as line stage
  133. AV / HT Preamp
  134. audio matrix
  135. mic pre application buffer op-amp question
  136. Does this preamp look any good?
  137. Replacement for LM833 in active crossover
  138. Not another project yet
  139. RJM Audio B-Board Project
  140. Cause of weak Preamp channel
  141. Schematic Boston PV700
  142. discrete op amp
  143. Resistor between line out and GND: what for?
  144. Recap Rotel RC1070
  145. Speaker selector / level equalizer?
  146. Voltage Readings Following Soldering Error
  147. Selector switch - replacement - shielded wire?
  148. Frequency Response of WW Pots?
  149. Passive pre, adding buffers
  150. AI Modulus preamp...heat damage?
  151. auto level control for input
  152. Which opamp in this preamp circuit?
  153. Audio Pre Amplifier
  154. Cotton OCC 5N Silver Interconnect Cables
  155. Mic Preamp output protection
  156. Krell KAV-250cd Output stage drawn
  157. Stereo to Mono Circuit: need help with capacitor
  158. AD797 Preamp based on MBL 6010D
  159. Solderless RCA plugs for DIY interconnects
  160. options for source selector/volume control <£100/$150
  161. Pre Amp with pre-out for Arjen Helder Ta2020
  162. Cables: different YES - better ???
  163. Arcam AV9 processor
  164. Looking for unbalanced to balanced transformer
  165. Frequency cut out switches. Graphic EQ.
  166. Stepped attenuator ?
  167. active tri line splitter using BJT transistor
  168. Neotech UPOCC Silver vs HGA Silver
  169. All In One Mixer/PC Project
  170. Sweep Eq
  171. Methods of Handling Various Devices and Grounding - Ground Loop Issues
  172. In-depth analysis of effect of high-quality interconnects
  173. Universal FET buffer / preamplifier
  174. Simple Pre-Amp with Variable High-Pass - This right?
  175. How to derermine the optimum bias resistor value ?
  176. output inductor?
  177. RGB LEDs amp audio level
  178. installing an analog audio output jack on a television?
  179. Help needed for Krell krs-1a preamp
  180. power conditioner project anyone ??
  181. DQ-LP1 Help
  182. upgrading active xover with LM4562
  183. 48VDC Phantom Power switch - seeking advice
  184. Rotel RTC-970 - Remote Controller RR970
  185. bi-amp'd, with passive mid/high ??
  186. Interesting Interconnect Cables
  187. Hum in RC cable
  188. Help for upgrading Pioneer receiver
  189. My attempt at a Monitor Volume Control with headphone outs
  190. Pumpkin Problems
  191. Rod Elliot - Audio Mixing Console (HELP!!)
  192. looking for a 3 way active crossover for diy powered speaker
  193. RFI woes
  194. need info on preamps for use on baf1
  195. Mixer Channel for observation
  196. Help With Existing Crossover Points
  197. stepped aattenuator - stop pops
  198. Adcom GFP-565 Input Selector
  199. Subsonic Filters & Film Caps
  200. DIY build of the Pioneer C-21 preamplifier
  201. Preamplifier with integrated circuits
  202. mixer circuits (looking for simple, but very high quality)...
  203. Subwoofer circuit: Going from speaker level to line level
  204. Adding Phantom Power to old board?
  205. Designing a versatile pre with balanced and unbalanced in/out
  206. Help Pls - Coupling Capacitor
  207. How to pick a good audio transistor?
  208. Volume control question
  209. Loudness stage
  210. Electret microphone Pre-amp
  211. Gold pin tube : does it really matters ?
  212. Mic preamp and high/low impedance technical question
  213. Studiomaster 16 x 4 Console
  214. Portable EQ? - Battery Power & SMALL
  215. DIY Tube Equalizer
  216. Using INA217 for Microphone Pre-amp
  217. Here's my DIY passive attenuator / pre / integrated DAC
  218. Basic questions on passive line-level XOs and with bi-amping
  219. Perreaux SM2 Custom
  220. Luxman A522 tonearm?
  221. passive switcher/splitter for monitor controller
  222. XO Components
  223. balanced to unbalanced convertor
  224. CD vs LP
  225. Stan Curtis site
  226. Counterpoint 5.1 Issue
  227. Ebay preamp FET
  228. Some help with high end input selector.
  229. Crossover help!!
  230. Help With Crossover 3-Way Seas 9.1 Home Theater
  231. Simple, good quality equalizer?
  232. Passive Balanced switching and Relay questions!!
  233. Preout mod
  234. remote control unit
  235. Schematic For Vendetta Xover
  236. One of best sounded Line Pre-/RIAA Head Amp from PureAudio-who have heard ?
  237. LDR att. L+R imbalance?
  238. Schematics needed for 3V 1KHz Sine wave generator
  239. is this a balanced input preamp? help m please?
  240. Copland CTA305 schematic
  241. just got a B&K CS-117, lets take a look inside...
  242. Diamond buffer kits any good for preamp?
  243. Analog Multichannel like ProLogic and ProLogic 2 (II) which professional Models
  244. JC-80 eBay PCBs
  245. Connecting many audio output devices to one input device
  246. BBE FJB-200X
  247. Help needed -Electrocompaniet EC4.7 preamp
  248. Improving rejection ratio of subtraction circuit
  249. Delay line for front channel
  250. Wireless analog connection TV -> amp?