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  1. High Performance Class A Current Feeback Headphone Amplifier
  2. Inverting CMOY with inverting DC servo for 5V USB
  3. Output Resistor on Bravo V2
  4. First build, needing a little direction
  5. cmoy tube amp... mic amp?
  6. Headphone insert
  7. Two stage opamp amplifier PCB 5x5cm
  8. Classic-50mW
  9. OPA2134 headphone amplifier or recommend something better
  10. Replacing power MOSFETs in SDS Labs headphone amplifier
  11. Headphone amplifier (Lavardin Follower)
  12. One Ohm Resistor Separating Grounds?
  13. Power handling value of headphone drivers?
  14. Turning stereo signal to two mono signals
  15. Hybrid Headphone Amplifier
  16. problem with my first lme49723 amp
  17. Theoretical Full Range Ribbon Headphones
  18. TPA6120 Resistor Question
  19. Cmoy voltage fluctuation problem
  20. High-voltage hybrid headphone amp
  21. Why such a large input series resistor?
  22. inductor+resistor network for headphone amp output?
  23. My Own Headphone Amp
  24. Diy headphone options for AKG k701's
  25. OPA2134 Input Stage...
  26. OPA2134+LM6172 composite amp ?
  27. dual purpose amp question.
  28. importance of output impedance for headphones?
  29. AKG 601 cable really BI-WIRE?
  30. OP-amp getting hot
  31. Headphone Amplifier project
  32. Modifying the SMSL SAP VI for low impedance headphones
  33. artwork on cans?
  34. My first Desktop HPA
  35. Volume control
  36. Best way to implement a voltage gain stage with opamp?
  37. DIY HEADPHONES
  38. Audeze LCD poor comfort – any mods?
  39. Headphone capsules: OEM stuff
  40. OPA2134/IRF510 Schematic...
  41. Need Headphone Amp Schematic for NJM4556
  42. Headphones for me, speakers for wife
  43. Headphone amp level = line level? (Maybe obvious question)
  44. My first HPA design...comments please!
  45. Transparent & Objective: My Objective 2 build
  46. My O2 Portable Amp
  47. O2 Front Panel
  48. My LM5532 Headphone Amplifier project
  49. CMOY with Common Collector Buffer
  50. CMoy Desktop with Buffers
  51. Objective o2 diy no sound
  52. Cmoy help please!
  53. µCmoy - My take on the portable CMoy amp
  54. My Headphone amp. Very diy...
  55. Opa2134 Max. Power dissipation
  56. 49600 single ended amp; I blew up the output caps!
  57. MultiLoop Amp Output impedance
  58. Need a small amplifier
  59. OPA2134 in parallel
  60. Desktop Cmoy with NJM4556 Buffers
  61. Portable headphone amp
  62. NJM4556 Output Impedance
  63. TPA6120A2 Input Bias Voltage Protection
  64. geek Wave DAP
  65. HPA-1 Class A Headphone Amplifier
  66. Very good Headphone Amplifier
  67. CMOY problem - any ideas welcome
  68. CMOY problem - any ideas welcome
  69. CMOY issues - all ideas welcome
  70. HELP: tuning for AKG601 + MJ mini tube amp
  71. Crosstalk issue with homebrew headphone amps
  72. A composite with LT1210 - another way of doing it
  73. CMoy Opa2134 minimum Gain
  74. Cmoy vs Chipamps
  75. DIY portable USB headphone AMP/DAC- recommended ICs?
  76. My first amp!
  77. Pot before a high pass filter
  78. CMoy Mod for drive speakers
  79. Old School tda2003 Headphone amp
  80. Noobie looking for a cheap heaphones amp
  81. Headphone amp from AN-272 Op Amp Booster Designs
  82. Elektor improved headphone preamp. Is it good quality?
  83. Cmoy with RA input?
  84. GAMECOM Headphone Cable
  85. Stereo crosstalk gets worse with frequency?
  86. Decware ZKIT3 Clipping
  87. WARNING hillyhifi
  88. 49600 Electrostatic Discharge Concerns
  89. So, your Grados are too bright?
  90. o2 flush gain switch?
  91. clip on heat sinks for TO-263
  92. Looking for a closed HP driver
  93. Headphone amp with RCA bypass grounding
  94. About Crossfeed concept
  95. Optimizing a TPA6120a2 layout
  96. Quality 6.35mm Stereo Headphone Socket?
  97. cmoy amp suggestions
  98. simple, high performance amp using DRV134?
  99. General Headphone Amplifier Survey
  100. O2 headamp PM latch PC board to stop O2 low battery buzzing
  101. Headphone system - volume pot placement.
  102. 2 wires for Return Terminal and 1 wire for (+) Terminal in EXPENSIVE Headphone cable
  103. Too simple MOSFET ESL amplifier
  104. summing to mono
  105. Inexpensive O2 faceplates on Ebay
  106. Headphone amp on perfboard: layout critics welcome
  107. *For Sale* objective 2 Failed to launch *For Sale*
  108. Producing Headphones
  109. Need help building a headphone relay
  110. Low cost Stax headphone amplifier
  111. Douglas self_Ground cancelling & 0-impedance ??
  112. 3,5 to RCA cable
  113. RJM Sapphire build thread:
  114. Mistakenly ordered a 100k pot for O2 amp.
  115. Broskie Headphone Amp - frequency response
  116. Brig, any thoughts?
  117. Help with volume independent humming...
  118. Benchmark headphone amp-white paper by John S.
  119. Simplest headphone amp circuit (something like you'd get in a walkman or MP3 player)?
  120. ATTN: Beyerdynamic owners
  121. new opamps break in
  122. 32 Ohm- actual impedance at diff. frequencies?
  123. Gilberd headphone amplifier
  124. Acoustics in closed vs. open design confusing - help needed!
  125. O2 amp troubleshooting - help a newbie!
  126. Headphones for music production
  127. Headphone Data Sheet Table with power, voltage & current
  128. Headphone amp also used as preamp for long cable
  129. ground question
  130. Adventures in Headamp Country
  131. GIBRID TELEFONE AMP.
  132. Grado SR60 and a near field sub
  133. SCHURTER - 4802.2330 - SOCKET, 3.5MM JACK, PCB, 3POLE
  134. Receiver Headphone output - modifications?
  135. Headphone amplifier that runs on 5V?
  136. Headphones that pick up FM transmitted stations?
  137. Components for KA2209 headphone amplifier?
  138. stereo jacks look dangerous!
  139. Minimal headphone circuit.
  140. +/- 8/10V from 5V USB power converter
  141. Help choosing replacement headphones
  142. Bluetooth Headphones - Bluedio's "R+"
  143. Need help understanding current loops...
  144. Little-Bear B1 modding..
  145. Headphone amplifier using SJ2520
  146. Wich Over-Ear Headphones and a Soundcard or DAC/AMP Combo?
  147. How to DIY headphones?
  148. 19J6 Millett amp
  149. Valuable dual opa for headphones amp
  150. Need travel headphones < 300 dollars
  151. Objective + ODAC modifications
  152. Help my cmoy is popping caps
  153. SOHA II amp tripping
  154. cisco power supply, grounding and the Millett starving student
  155. cisco power supply, grounding and the Millett starving student
  156. Help Summing Two Headphone Outputs
  157. question re crossfeed for low imped phones
  158. 6DJ8 headphone amp
  159. THD vs bias voltage for ESL headphones
  160. Just for fun
  161. Creek OBH-21 SE problem
  162. Current source in diamond buffer
  163. Where do I start? (re: need a DIY amp project)
  164. 6N OCC 24awg single strand for headphones ?
  165. From amp w/ "bare wire" output to headphones...
  166. My new headphone amp
  167. Why are external amplifiers superior?
  168. Headphones and Hearing aids
  169. Reacheargeable CMoy Amp??
  170. Testing headphones
  171. Discrete op amp headphone amplifier module, based on Marantz
  172. Koss ESP9 Headphones Low Volume Fixed!
  173. Please help with DIY headphone amp.
  174. Huginn, High performance, Class A, Lateral FET headphone amplifier
  175. MAT12 / MAT14 based headphone amp
  176. DC servo for Sijosae Buffer
  177. connect two inverting op amps together
  178. Yet Another Cmoy - PCB layout with Eagle and making PCB
  179. How to prevent unwanted volume adjustments on volume knob of a portable amp
  180. Project Ember ?
  181. O2 and power questions...
  182. Beyerdynamic A1 clone gold, opamp rolling
  183. Is there a better way to implement buf634 other than place in a a loop?
  184. An early look at my new HPA design
  185. O2 XLR, St/Mono swtich, etc Mod. ?'s
  186. A question regarding bass boost and output buffers
  187. O2 headamp output booster PCB
  188. cMoybb op amp rolling with AD797BRZ
  189. Millett Hybrid Starving Student (12AU7)
  190. Good capacitors for cmoy
  191. mysterious headphones
  192. New 4 layer LME49610 Headphone Amplifier D1
  193. Simple Headphone's Amp for beginner
  194. upgrading x-can V1? anyone?
  195. Headphone Amps DIY for beginners
  196. some question about headphone amp (possibly the o2)
  197. Unknown Stax Headphones for SRD-7
  198. Moskido Hybrid headphone amplifier! Help needed
  199. Lowest capacitance hum-rejecting 4-wire headphone cable configuration
  200. Best amp possible for the hd-650
  201. Looking for a Headphone Amplifier
  202. Shure Earphones SE846
  203. Headphone equalization hardware and software
  204. VSSA FOR HEADPHONE
  205. pcb layout for grado ra1 ?
  206. grado ra1 clone
  207. Szekeres vs. PRR-SOL amplifier
  208. Optimal grounding
  209. 4 channel stereo mixer
  210. New PC setup.
  211. Class A Heaphone Amp
  212. DIY Headphone Tap + Passive Mixer
  213. Beats by Dr Dre headphones or alternative models/brands?
  214. In line sound limiter for headphones
  215. Adjustable Ear phone volume limiter
  216. MOSFET follower to my phone
  217. Crazy CMOY board
  218. starving student vs jonokuchi or hybrid vs tubes for hd600 and sr80i ?
  219. Tube/SS OTL single tube recommendations
  220. Pseudo Bravo headphone amplifier
  221. PUSH-PULL HEADPHONE AMP
  222. Single valve amp
  223. My desktop Objective2 amp
  224. O2 loud turn on transient fix help...
  225. Help wanted to find an old schematic
  226. Dual TPA6120A2 headphone design to eliminate crosstalk
  227. Need an AMP recommendation, and have a couple questions.
  228. Pot value in cmoy
  229. YAHA HELP
  230. OPA827 + Diamond Buffer
  231. newbie qustion
  232. Advice on USB Soundcard / USB DAC + Amplifier
  233. 6n2 + fu32 vacuum tube tube headphone amplifier
  234. Headphone amp recommendation required?
  235. Tube Headphone amplifier suggestions 2x(1:40) transformers
  236. Different grounding, different sound quality or what can be the problem?
  237. Radio Shack Digital to Analog Converter
  238. 2SC1815 alternative for Mini Zen
  239. Two-Way Headset Wiring
  240. whats worng with this circut
  241. Phono amp top slot board for O2 amplfier in B3 case
  242. Szekeres VE protection diodes?
  243. Headphone Amp Feels 'Electrified'
  244. Design Issue: Cascaded passive filer stages
  245. Headphone amp between source & amplifier - how to passthrough?
  246. Open Source Headphone Amplifier
  247. OPA2132/4 for headphones
  248. O2 LiPo Daughterboard
  249. Class AB with op-amp input, audible noise
  250. PCB check for a simple amp

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