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  1. [Help] Headamp design & layout
  2. OPA1688 Super CMOY, 2x 9V with real ground and headphone relay - PCBs
  3. Good class A headphone amp to build?
  4. Full noob, but would like to learn more and build
  5. Advice on finding a Power Supply for the O2 amp in Japan/100v
  6. Simple head-amp with high linearity
  7. Help for some issues regarding amp internal rewiring
  8. XEN SHPP -- Simple Headphone Protection
  9. Ultra-Hi-Res headamp
  10. a diy portable headphone amp system.
  11. Damping factor, could someone refresh my mind?
  12. Rudistor NX-03 clone
  13. Op-amp for headphones
  14. OP AMP rolling, in the HA or PRE?
  15. Amp for Fostex T50rp Mk3 - Objective2 or other?
  16. 3.5 mm to rca
  17. Amp design help needed.
  18. DC servo high offset on startup?
  19. Koss warranty
  20. Universal buffer/headamp based on OPA1622
  21. Millett Butte Headphone Amp Problem
  22. 3-Transistor Headphone Amplifier
  23. DIY "Bullet Headphones"
  24. splitting ground planes
  25. Psychosis
  26. No-gain diamond buffer headphone amplifier advice
  27. Changing Cap Value for Frequency Change
  28. Old phono pre amp as headphone buffer?
  29. Diamond buffer as portable amplifier
  30. JFET-only Headphone Amp "Circlotron КП903B".
  31. zenkit1 with akg714pro or sennheiser hd650
  32. Need a Shure earphone kludge
  33. Unity gain buffer for Sennheiser HD600
  34. Stabilizing difference amplifiers for headphone applications
  35. Mu-stage with mosfet on top
  36. Audio to headphone amp via USB
  37. Linkwitz low impedance xfeed board
  38. How to measure volume output for pot selection?
  39. Faulty Headphones?
  40. Need help for TPA6120 Headphone Amplifier
  41. Hybrid tube/MOSFET headphone amp
  42. Noob Building a α20 Headphone Amp
  43. AM I CRAZY? DIY nearfield nude driver desktop headphone concept
  44. will it work?
  45. HPA design - bipolar supplies, transformers, etc
  46. Problems intigrating headphone preamp with phono amp, fm transmitter...
  47. Balanced vs unbalanced 4 wire connection
  48. my probably new cross-feed
  49. Help appreciated!
  50. Headphone amp/dac combo for 200 (o2/oDac vs Schiit Stack vs ???)
  51. Avoid Harsh Noises From Regulator Spikes
  52. HD598 and OPA2134
  53. Noob Building an F5-HA
  54. Advice Selecting ebay Headphone DIY Board
  55. Gilmore Headphone Amp
  56. SMSL Sap II too loud
  57. Diamond Buffer with DC Servo
  58. headphone amplifier
  59. Ear bud connector
  60. Tube amp kit ideas for Ultrasone Pro 500 cans
  61. Triode as double triode
  62. Headphone Amp to Pi and Dac + Pro
  63. Little-Bear p1 questions
  64. XEN ZGF Portable Headphone Amplifier
  65. audio amp recommendation
  66. Stax SRD-X input
  67. RCA input Headphone Amp, Any Exist?
  68. Simply direct coupled class a headphone amp
  69. Beyerdynamic A1 clone, need some help
  70. Looking for Bluetooth, synchronous headphone/mic transmitter
  71. Need help pre CMOY build
  72. Help choose between two kits
  73. the amplifier on the tantalic triode 3C24 for all types of earphones and acoustics.
  74. Preparing for first opamp build
  75. Dual mono LME49600
  76. How to wire up a mic for an iphone
  77. Indeed G2 12AU7 Amp - circuit repair help
  78. Crossfeed for HD600
  79. [Headamp] upgrading a Lehmann BCL clone
  80. Class-A Mosfet Headphone Amplifier
  81. Case Layout for Headphone Amp and RPi
  82. Pioneer SE-M290 headphone broken headband repair
  83. Objective 2 amp issues
  84. Yet another headamp..a few questions
  85. Headphones unbalanced after driver replacment
  86. hifisonix small signal class a?
  87. Upgrading the Aune X1 SE/Pro HeadAmp/DAC/Pre-amp
  88. I/V stage running hot
  89. bandpass filter
  90. "My" first design headamp, DC-servo question
  91. Recommend a kit for newbie
  92. My Headphone AMP w. OPA134 & BUF634
  93. $500+/- headphone for movies/casual gaming
  94. Walker Amp Wireless World 1971
  95. ATH-M40x
  96. mains hum
  97. QRV04 Headphone Amp. + Red Baron v5 DAC
  98. Southwest Technical Products Corp. (SWTPC) Headphone Amp 202-C
  99. Adapting my Cmoy to TRRS headphones
  100. Cmoy input resistor value?
  101. Toxic Fraud
  102. BUF634 Open Loop with Single Supply
  103. what is standart smartphone headphone audio output power (mW) at 32 ohms?
  104. Amp for connecting ATH-R70X to PC
  105. Starving Student (20EZ7)
  106. Ebay amp..
  107. Stereo passive somation
  108. Focal Spirit One mod
  109. This is what happens...
  110. Stax pro SRD-7 hum
  111. Cmoy, Charge Pump Inverter, Regulated
  112. TPA6120 Output Impedace
  113. Opa2134 + Buf634 output impedance
  114. 8-pin 6.5mm headphone connector pinouts are needed
  115. TPA6120 Single Supply
  116. Biasing OPAMP to class A [Hi Current type]
  117. cmoy with a 2 x 12v psu
  118. DIY Headphone Amp - Comments and advice appreciated
  119. HRTFs and the AES69-2015
  120. Terry Gesualdo Headphone Adapter
  121. About HA5000 Design
  122. Chassis mount jack socket help
  123. Simple Diy headphone amp
  124. Headphone amp with 2SK1058
  125. Headphone output on push-pull amplifier?
  126. Since the njm4556 are so cheap... class a biasing
  127. An inverting version of the NwAvGuy O2 headphone amp vs. the original: THD+N
  128. How to add Headphone amplifier to Silicon Chip 2009 DAC?
  129. Hissing problem of a hybrid amp
  130. Amp matching to headphones
  131. I need new headphones
  132. my great sounding tube hpa
  133. Sennheiser headband repair
  134. Help with bass amp for headphones for study purposes
  135. cmoy op amp virtual ground question
  136. parallel opamp amplifier
  137. Isolate 2 headphone amps with one source - HELP!
  138. TPA6120 Breakout - Free Design Files
  139. PCM2707 and TPA6120 Amp - Boards and Design Files
  140. Recommendations for Closed-Back Headphones
  141. Headphones with dual jack, reduced volume
  142. Fault finding, BCL Clone, help needed.
  143. Low Impedance Headphone/Earphone Amp
  144. Do you use your O2 as desktop, portable, or both?
  145. Passive Bass Boost circuit?
  146. Looking for a schematic..
  147. Noise, too much noise.
  148. Pono in Balanced Mode
  149. Gaming Headphones mod ideas
  150. Material for Headphone cushion and fabric?
  151. Good low impedance headphone amp project
  152. Suggestion for headphone
  153. Anyone ID these headphones?
  154. My first headamp project
  155. Xfeed network
  156. Amp suggestion
  157. single-ended (hope:) ) headphone amplifier with minimal NFB and low THD
  158. Cavalli's EHHA r1 kit question
  159. Headphone amp series current limiter resistor
  160. HD600 recabling
  161. Tube amp with usb
  162. A little compilation Erwin's Amp
  163. Help with faulty Pioneer Headphones please?
  164. Sound Magic Hp200 Premium Audiophile headphones!
  165. Using sApii Pro TPA6120a2 at lower voltage?
  166. Grasshopper
  167. My mobile Headphone AMP w. OPA134 & BUF634
  168. Trying to convert a pre amp to an headphone amp I could use some help..
  169. what's up with Headwize website ?
  170. Digital potentiometer. Distortion and line level
  171. MOSFET amp instability
  172. Is the O2/ODAC combo right for me? Are there better alternatives for me?
  173. limited soundstage with headphones
  174. headset to microphone
  175. Does anyone know how to use the digital potentiometer DS1882
  176. High Fidelity Ear Protection: "Protect your ears from bad sounding HiFi systems!"
  177. Need Help With DIY Switch Box
  178. Looking for a simple high quality amp to drive 600 ohm load
  179. Load output resistors in parallel opamps amplifier
  180. Bone conduction headphones
  181. headphone cable choice
  182. Headphones on TA2024 Single powered D Class amp
  183. Help with volume control on a headphone amplifier?
  184. SIT Headphone amplifier (VFET S.F. buffer)
  185. Headphone impedance matching with tube head amp
  186. My O2 & Subbu DAC build
  187. Monster headphone rebuild - need help please
  188. Amplifier for akg k340 (400ohms)
  189. Single NE5532 driving 38ohms?
  190. class A Buffer
  191. Headphones invention challenge with Harman Audio
  192. DIY 12AU7 Hybrid Amp voltage variances
  193. O2 amp only playing sound through one channel
  194. Tone control
  195. Another site noob needing help with his O2!!
  196. Portable LME49720 Headphone Amp
  197. schematic request for tpa6120/ne5534 ebay amp
  198. Cable Dongle ? What is it?
  199. Are these ICs legitimate?
  200. single NE5532P headphone amp ?!
  201. How does op amp introduce power supply noise to output?
  202. CFA Headphones amplifier
  203. Which resistor value for Gain
  204. lme49600 pcb for discrete jensen 918
  205. Headphone Buffer With Power Supply
  206. How to calculate Zobel/Boucherot Circuit
  207. MSA 30X Sound Amplifier
  208. Headphone Power Buffer
  209. 100Hz Hum in Lehmann Linear clone
  210. What you guys think of this Headphone amp?
  211. Personal Monitor System
  212. OBH-11 passive preamp mod
  213. "The Crocodile"
  214. PCM2407 DAC click & pop issue.
  215. Balanced Headphone amplifier for HiRes Bluray
  216. Shorted Channels w/o apparent effect on SQ
  217. ESL headphones and amp.
  218. Which Amp best suited for Earphone
  219. OUTONE Pseudobridge system
  220. Which amplifier for Sennheiser HD 598?
  221. Headphone Amp IC
  222. HIGH performance HeadPhone amplifier OUTONE
  223. Another take on the Diamond Buffer
  224. First Headphone Amp Build
  225. Another implementation of Class A buffer for headphone
  226. Schematic help for wierd problem.
  227. CMoy with other Chips
  228. HiFi Headphone Amp for Recording Studio
  229. special tool for 3.5mm strain relief?
  230. IEM Amp Design Help
  231. Converting the Bugle2 to a headphone amp?
  232. A High-Quality, High-Power Headphone Amplifier
  233. Stereo intercom for my experimental airplane
  234. [ask] Is there a way to mod a CMOY amp to have more power?
  235. Opa551 getting very hot in inverting configuration
  236. low impedence buffer
  237. A simple 2-Ch mixer, suggestions, ideas?
  238. O2 Amp Build - Resistor Question
  239. How to bypass volume potentiometer Sennheiser PC360
  240. DC protection for headphones
  241. Should replacement headphone cable telescope the shield?
  242. Headphone Attenuator, Or do I need an amp
  243. starting diy with a cmoy
  244. Neodymium Magnets - Strength/Weight
  245. Which Class-A Build?
  246. Headphone Mic Wiring
  247. Portabel Headphone Amplifier
  248. Precission EQ of Headphones
  249. Ribbon Microphones for Noise Canceling
  250. adding 18 watt valve amp on pc

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