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  1. my great sounding tube hpa
  2. Sennheiser headband repair
  3. Help with bass amp for headphones for study purposes
  4. cmoy op amp virtual ground question
  5. parallel opamp amplifier
  6. Isolate 2 headphone amps with one source - HELP!
  7. TPA6120 Breakout - Free Design Files
  8. PCM2707 and TPA6120 Amp - Boards and Design Files
  9. Recommendations for Closed-Back Headphones
  10. Headphones with dual jack, reduced volume
  11. Fault finding, BCL Clone, help needed.
  12. Low Impedance Headphone/Earphone Amp
  13. Do you use your O2 as desktop, portable, or both?
  14. Passive Bass Boost circuit?
  15. Looking for a schematic..
  16. Noise, too much noise.
  17. Pono in Balanced Mode
  18. Gaming Headphones mod ideas
  19. Material for Headphone cushion and fabric?
  20. Good low impedance headphone amp project
  21. Suggestion for headphone
  22. Anyone ID these headphones?
  23. My first headamp project
  24. Xfeed network
  25. Amp suggestion
  26. single-ended (hope:) ) headphone amplifier with minimal NFB and low THD
  27. Cavalli's EHHA r1 kit question
  28. Headphone amp series current limiter resistor
  29. HD600 recabling
  30. Tube amp with usb
  31. A little compilation Erwin's Amp
  32. Help with faulty Pioneer Headphones please?
  33. Sound Magic Hp200 Premium Audiophile headphones!
  34. Using sApii Pro TPA6120a2 at lower voltage?
  35. Grasshopper
  36. My mobile Headphone AMP w. OPA134 & BUF634
  37. Trying to convert a pre amp to an headphone amp I could use some help..
  38. what's up with Headwize website ?
  39. Digital potentiometer. Distortion and line level
  40. MOSFET amp instability
  41. Is the O2/ODAC combo right for me? Are there better alternatives for me?
  42. limited soundstage with headphones
  43. headset to microphone
  44. Does anyone know how to use the digital potentiometer DS1882
  45. High Fidelity Ear Protection: "Protect your ears from bad sounding HiFi systems!"
  46. Need Help With DIY Switch Box
  47. Looking for a simple high quality amp to drive 600 ohm load
  48. Load output resistors in parallel opamps amplifier
  49. Bone conduction headphones
  50. headphone cable choice
  51. Headphones on TA2024 Single powered D Class amp
  52. Help with volume control on a headphone amplifier?
  53. SIT Headphone amplifier (VFET S.F. buffer)
  54. Headphone impedance matching with tube head amp
  55. My O2 & Subbu DAC build
  56. Monster headphone rebuild - need help please
  57. Amplifier for akg k340 (400ohms)
  58. Single NE5532 driving 38ohms?
  59. class A Buffer
  60. Headphones invention challenge with Harman Audio
  61. DIY 12AU7 Hybrid Amp voltage variances
  62. O2 amp only playing sound through one channel
  63. Tone control
  64. Another site noob needing help with his O2!!
  65. Portable LME49720 Headphone Amp
  66. schematic request for tpa6120/ne5534 ebay amp
  67. Cable Dongle ? What is it?
  68. Are these ICs legitimate?
  69. single NE5532P headphone amp ?!
  70. How does op amp introduce power supply noise to output?
  71. CFA Headphones amplifier
  72. Which resistor value for Gain
  73. lme49600 pcb for discrete jensen 918
  74. Headphone Buffer With Power Supply
  75. How to calculate Zobel/Boucherot Circuit
  76. MSA 30X Sound Amplifier
  77. Headphone Power Buffer
  78. 100Hz Hum in Lehmann Linear clone
  79. What you guys think of this Headphone amp?
  80. Personal Monitor System
  81. OBH-11 passive preamp mod
  82. "The Crocodile"
  83. PCM2407 DAC click & pop issue.
  84. Balanced Headphone amplifier for HiRes Bluray
  85. Shorted Channels w/o apparent effect on SQ
  86. ESL headphones and amp.
  87. Which Amp best suited for Earphone
  88. OUTONE Pseudobridge system
  89. Which amplifier for Sennheiser HD 598?
  90. Headphone Amp IC
  91. HIGH performance HeadPhone amplifier OUTONE
  92. Another take on the Diamond Buffer
  93. First Headphone Amp Build
  94. Another implementation of Class A buffer for headphone
  95. Schematic help for wierd problem.
  96. CMoy with other Chips
  97. HiFi Headphone Amp for Recording Studio
  98. special tool for 3.5mm strain relief?
  99. IEM Amp Design Help
  100. Converting the Bugle2 to a headphone amp?
  101. A High-Quality, High-Power Headphone Amplifier
  102. Stereo intercom for my experimental airplane
  103. [ask] Is there a way to mod a CMOY amp to have more power?
  104. Opa551 getting very hot in inverting configuration
  105. low impedence buffer
  106. A simple 2-Ch mixer, suggestions, ideas?
  107. O2 Amp Build - Resistor Question
  108. How to bypass volume potentiometer Sennheiser PC360
  109. DC protection for headphones
  110. Should replacement headphone cable telescope the shield?
  111. Headphone Attenuator, Or do I need an amp
  112. starting diy with a cmoy
  113. Neodymium Magnets - Strength/Weight
  114. Which Class-A Build?
  115. Headphone Mic Wiring
  116. Portabel Headphone Amplifier
  117. Precission EQ of Headphones
  118. Ribbon Microphones for Noise Canceling
  119. adding 18 watt valve amp on pc
  120. 5x5 Headphone amplifier/Preamplifer
  121. Headphone amp?
  122. Isodynamic Planar Magnetic Headphones
  123. ATH-DN1000USB Audio Technica DNote Digital USB Headphone
  124. Simple SE buffer, any better idea ?
  125. Ribbon Drivers in Headphones
  126. 600 Ohm headphones that are not Beyerdynamic
  127. First time building CMOY - Need some help
  128. specification of headphone
  129. Differences in headphones and speaker amps
  130. Head 'n' HiFi - Walter: O2 Headphone Amp Kit
  131. head amp for AKG K-2xx serie(600 Ohm)
  132. High Performance Class A Current Feeback Headphone Amplifier
  133. Inverting CMOY with inverting DC servo for 5V USB
  134. Output Resistor on Bravo V2
  135. First build, needing a little direction
  136. cmoy tube amp... mic amp?
  137. Headphone insert
  138. Two stage opamp amplifier PCB 5x5cm
  139. Classic-50mW
  140. OPA2134 headphone amplifier or recommend something better
  141. Replacing power MOSFETs in SDS Labs headphone amplifier
  142. Headphone amplifier (Lavardin Follower)
  143. One Ohm Resistor Separating Grounds?
  144. Power handling value of headphone drivers?
  145. Turning stereo signal to two mono signals
  146. Hybrid Headphone Amplifier
  147. problem with my first lme49723 amp
  148. Theoretical Full Range Ribbon Headphones
  149. TPA6120 Resistor Question
  150. Cmoy voltage fluctuation problem
  151. High-voltage hybrid headphone amp
  152. Why such a large input series resistor?
  153. inductor+resistor network for headphone amp output?
  154. My Own Headphone Amp
  155. Diy headphone options for AKG k701's
  156. OPA2134 Input Stage...
  157. OPA2134+LM6172 composite amp ?
  158. dual purpose amp question.
  159. importance of output impedance for headphones?
  160. AKG 601 cable really BI-WIRE?
  161. OP-amp getting hot
  162. Headphone Amplifier project
  163. Modifying the SMSL SAP VI for low impedance headphones
  164. artwork on cans?
  165. My first Desktop HPA
  166. Volume control
  167. Best way to implement a voltage gain stage with opamp?
  168. DIY HEADPHONES
  169. Audeze LCD poor comfort – any mods?
  170. Headphone capsules: OEM stuff
  171. OPA2134/IRF510 Schematic...
  172. Need Headphone Amp Schematic for NJM4556
  173. Headphones for me, speakers for wife
  174. Headphone amp level = line level? (Maybe obvious question)
  175. My first HPA design...comments please!
  176. Transparent & Objective: My Objective 2 build
  177. My O2 Portable Amp
  178. O2 Front Panel
  179. My LM5532 Headphone Amplifier project
  180. CMOY with Common Collector Buffer
  181. CMoy Desktop with Buffers
  182. Objective o2 diy no sound
  183. Cmoy help please!
  184. µCmoy - My take on the portable CMoy amp
  185. My Headphone amp. Very diy...
  186. Opa2134 Max. Power dissipation
  187. 49600 single ended amp; I blew up the output caps!
  188. MultiLoop Amp Output impedance
  189. Need a small amplifier
  190. OPA2134 in parallel
  191. Desktop Cmoy with NJM4556 Buffers
  192. Portable headphone amp
  193. NJM4556 Output Impedance
  194. TPA6120A2 Input Bias Voltage Protection
  195. geek Wave DAP
  196. HPA-1 Class A Headphone Amplifier
  197. Very good Headphone Amplifier
  198. CMOY problem - any ideas welcome
  199. CMOY problem - any ideas welcome
  200. CMOY issues - all ideas welcome
  201. HELP: tuning for AKG601 + MJ mini tube amp
  202. Crosstalk issue with homebrew headphone amps
  203. A composite with LT1210 - another way of doing it
  204. CMoy Opa2134 minimum Gain
  205. Cmoy vs Chipamps
  206. DIY portable USB headphone AMP/DAC- recommended ICs?
  207. My first amp!
  208. Pot before a high pass filter
  209. CMoy Mod for drive speakers
  210. Old School tda2003 Headphone amp
  211. Noobie looking for a cheap heaphones amp
  212. Headphone amp from AN-272 Op Amp Booster Designs
  213. Elektor improved headphone preamp. Is it good quality?
  214. Cmoy with RA input?
  215. GAMECOM Headphone Cable
  216. Stereo crosstalk gets worse with frequency?
  217. Decware ZKIT3 Clipping
  218. WARNING hillyhifi
  219. 49600 Electrostatic Discharge Concerns
  220. So, your Grados are too bright?
  221. o2 flush gain switch?
  222. clip on heat sinks for TO-263
  223. Looking for a closed HP driver
  224. Headphone amp with RCA bypass grounding
  225. About Crossfeed concept
  226. Optimizing a TPA6120a2 layout
  227. Quality 6.35mm Stereo Headphone Socket?
  228. cmoy amp suggestions
  229. simple, high performance amp using DRV134?
  230. General Headphone Amplifier Survey
  231. O2 headamp PM latch PC board to stop O2 low battery buzzing
  232. Headphone system - volume pot placement.
  233. 2 wires for Return Terminal and 1 wire for (+) Terminal in EXPENSIVE Headphone cable
  234. Too simple MOSFET ESL amplifier
  235. summing to mono
  236. Inexpensive O2 faceplates on Ebay
  237. Headphone amp on perfboard: layout critics welcome
  238. *For Sale* objective 2 Failed to launch *For Sale*
  239. Producing Headphones
  240. Need help building a headphone relay
  241. Low cost Stax headphone amplifier
  242. Douglas self_Ground cancelling & 0-impedance ??
  243. 3,5 to RCA cable
  244. RJM Sapphire build thread:
  245. Mistakenly ordered a 100k pot for O2 amp.
  246. Broskie Headphone Amp - frequency response
  247. Brig, any thoughts?
  248. Help with volume independent humming...
  249. Benchmark headphone amp-white paper by John S.
  250. Simplest headphone amp circuit (something like you'd get in a walkman or MP3 player)?

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