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  1. Classic-50mW
  2. OPA2134 headphone amplifier or recommend something better
  3. Replacing power MOSFETs in SDS Labs headphone amplifier
  4. Headphone amplifier (Lavardin Follower)
  5. One Ohm Resistor Separating Grounds?
  6. Power handling value of headphone drivers?
  7. Turning stereo signal to two mono signals
  8. Hybrid Headphone Amplifier
  9. problem with my first lme49723 amp
  10. Theoretical Full Range Ribbon Headphones
  11. TPA6120 Resistor Question
  12. Cmoy voltage fluctuation problem
  13. High-voltage hybrid headphone amp
  14. Why such a large input series resistor?
  15. inductor+resistor network for headphone amp output?
  16. My Own Headphone Amp
  17. Diy headphone options for AKG k701's
  18. OPA2134 Input Stage...
  19. OPA2134+LM6172 composite amp ?
  20. dual purpose amp question.
  21. importance of output impedance for headphones?
  22. AKG 601 cable really BI-WIRE?
  23. OP-amp getting hot
  24. Headphone Amplifier project
  25. Modifying the SMSL SAP VI for low impedance headphones
  26. artwork on cans?
  27. My first Desktop HPA
  28. Volume control
  29. Best way to implement a voltage gain stage with opamp?
  30. DIY HEADPHONES
  31. Audeze LCD poor comfort – any mods?
  32. Headphone capsules: OEM stuff
  33. OPA2134/IRF510 Schematic...
  34. Need Headphone Amp Schematic for NJM4556
  35. Headphones for me, speakers for wife
  36. Headphone amp level = line level? (Maybe obvious question)
  37. My first HPA design...comments please!
  38. Transparent & Objective: My Objective 2 build
  39. My O2 Portable Amp
  40. O2 Front Panel
  41. My LM5532 Headphone Amplifier project
  42. CMOY with Common Collector Buffer
  43. CMoy Desktop with Buffers
  44. Objective o2 diy no sound
  45. Cmoy help please!
  46. µCmoy - My take on the portable CMoy amp
  47. My Headphone amp. Very diy...
  48. Opa2134 Max. Power dissipation
  49. 49600 single ended amp; I blew up the output caps!
  50. MultiLoop Amp Output impedance
  51. Need a small amplifier
  52. OPA2134 in parallel
  53. Desktop Cmoy with NJM4556 Buffers
  54. Portable headphone amp
  55. NJM4556 Output Impedance
  56. TPA6120A2 Input Bias Voltage Protection
  57. geek Wave DAP
  58. HPA-1 Class A Headphone Amplifier
  59. Very good Headphone Amplifier
  60. CMOY problem - any ideas welcome
  61. CMOY problem - any ideas welcome
  62. CMOY issues - all ideas welcome
  63. HELP: tuning for AKG601 + MJ mini tube amp
  64. Crosstalk issue with homebrew headphone amps
  65. A composite with LT1210 - another way of doing it
  66. CMoy Opa2134 minimum Gain
  67. Cmoy vs Chipamps
  68. DIY portable USB headphone AMP/DAC- recommended ICs?
  69. My first amp!
  70. Pot before a high pass filter
  71. CMoy Mod for drive speakers
  72. Old School tda2003 Headphone amp
  73. Noobie looking for a cheap heaphones amp
  74. Headphone amp from AN-272 Op Amp Booster Designs
  75. Elektor improved headphone preamp. Is it good quality?
  76. Cmoy with RA input?
  77. GAMECOM Headphone Cable
  78. Stereo crosstalk gets worse with frequency?
  79. Decware ZKIT3 Clipping
  80. WARNING hillyhifi
  81. 49600 Electrostatic Discharge Concerns
  82. So, your Grados are too bright?
  83. o2 flush gain switch?
  84. clip on heat sinks for TO-263
  85. Looking for a closed HP driver
  86. Headphone amp with RCA bypass grounding
  87. About Crossfeed concept
  88. Optimizing a TPA6120a2 layout
  89. Quality 6.35mm Stereo Headphone Socket?
  90. cmoy amp suggestions
  91. simple, high performance amp using DRV134?
  92. General Headphone Amplifier Survey
  93. O2 headamp PM latch PC board to stop O2 low battery buzzing
  94. Headphone system - volume pot placement.
  95. 2 wires for Return Terminal and 1 wire for (+) Terminal in EXPENSIVE Headphone cable
  96. Too simple MOSFET ESL amplifier
  97. summing to mono
  98. Inexpensive O2 faceplates on Ebay
  99. Headphone amp on perfboard: layout critics welcome
  100. *For Sale* objective 2 Failed to launch *For Sale*
  101. Producing Headphones
  102. Need help building a headphone relay
  103. Low cost Stax headphone amplifier
  104. Douglas self_Ground cancelling & 0-impedance ??
  105. 3,5 to RCA cable
  106. RJM Sapphire build thread:
  107. Mistakenly ordered a 100k pot for O2 amp.
  108. Broskie Headphone Amp - frequency response
  109. Brig, any thoughts?
  110. Help with volume independent humming...
  111. Benchmark headphone amp-white paper by John S.
  112. Simplest headphone amp circuit (something like you'd get in a walkman or MP3 player)?
  113. ATTN: Beyerdynamic owners
  114. new opamps break in
  115. 32 Ohm- actual impedance at diff. frequencies?
  116. Gilberd headphone amplifier
  117. Acoustics in closed vs. open design confusing - help needed!
  118. O2 amp troubleshooting - help a newbie!
  119. Headphones for music production
  120. Headphone Data Sheet Table with power, voltage & current
  121. Headphone amp also used as preamp for long cable
  122. ground question
  123. Adventures in Headamp Country
  124. GIBRID TELEFONE AMP.
  125. Grado SR60 and a near field sub
  126. SCHURTER - 4802.2330 - SOCKET, 3.5MM JACK, PCB, 3POLE
  127. Receiver Headphone output - modifications?
  128. Headphone amplifier that runs on 5V?
  129. Headphones that pick up FM transmitted stations?
  130. Components for KA2209 headphone amplifier?
  131. stereo jacks look dangerous!
  132. Minimal headphone circuit.
  133. +/- 8/10V from 5V USB power converter
  134. Help choosing replacement headphones
  135. Bluetooth Headphones - Bluedio's "R+"
  136. Need help understanding current loops...
  137. Little-Bear B1 modding..
  138. Headphone amplifier using SJ2520
  139. Wich Over-Ear Headphones and a Soundcard or DAC/AMP Combo?
  140. How to DIY headphones?
  141. 19J6 Millett amp
  142. Valuable dual opa for headphones amp
  143. Need travel headphones < 300 dollars
  144. Objective + ODAC modifications
  145. Help my cmoy is popping caps
  146. SOHA II amp tripping
  147. cisco power supply, grounding and the Millett starving student
  148. cisco power supply, grounding and the Millett starving student
  149. Help Summing Two Headphone Outputs
  150. question re crossfeed for low imped phones
  151. 6DJ8 headphone amp
  152. THD vs bias voltage for ESL headphones
  153. Just for fun
  154. Creek OBH-21 SE problem
  155. Current source in diamond buffer
  156. Where do I start? (re: need a DIY amp project)
  157. 6N OCC 24awg single strand for headphones ?
  158. From amp w/ "bare wire" output to headphones...
  159. My new headphone amp
  160. Why are external amplifiers superior?
  161. Headphones and Hearing aids
  162. Reacheargeable CMoy Amp??
  163. Testing headphones
  164. Discrete op amp headphone amplifier module, based on Marantz
  165. Koss ESP9 Headphones Low Volume Fixed!
  166. Please help with DIY headphone amp.
  167. Huginn, High performance, Class A, Lateral FET headphone amplifier
  168. MAT12 / MAT14 based headphone amp
  169. DC servo for Sijosae Buffer
  170. connect two inverting op amps together
  171. Yet Another Cmoy - PCB layout with Eagle and making PCB
  172. How to prevent unwanted volume adjustments on volume knob of a portable amp
  173. Project Ember ?
  174. O2 and power questions...
  175. Beyerdynamic A1 clone gold, opamp rolling
  176. Is there a better way to implement buf634 other than place in a a loop?
  177. An early look at my new HPA design
  178. O2 XLR, St/Mono swtich, etc Mod. ?'s
  179. A question regarding bass boost and output buffers
  180. O2 headamp output booster PCB
  181. cMoybb op amp rolling with AD797BRZ
  182. Millett Hybrid Starving Student (12AU7)
  183. Good capacitors for cmoy
  184. mysterious headphones
  185. New 4 layer LME49610 Headphone Amplifier D1
  186. Simple Headphone's Amp for beginner
  187. upgrading x-can V1? anyone?
  188. Headphone Amps DIY for beginners
  189. some question about headphone amp (possibly the o2)
  190. Unknown Stax Headphones for SRD-7
  191. Moskido Hybrid headphone amplifier! Help needed
  192. Lowest capacitance hum-rejecting 4-wire headphone cable configuration
  193. Best amp possible for the hd-650
  194. Looking for a Headphone Amplifier
  195. Shure Earphones SE846
  196. Headphone equalization hardware and software
  197. VSSA FOR HEADPHONE
  198. pcb layout for grado ra1 ?
  199. grado ra1 clone
  200. Szekeres vs. PRR-SOL amplifier
  201. Optimal grounding
  202. 4 channel stereo mixer
  203. New PC setup.
  204. Class A Heaphone Amp
  205. DIY Headphone Tap + Passive Mixer
  206. Beats by Dr Dre headphones or alternative models/brands?
  207. In line sound limiter for headphones
  208. Adjustable Ear phone volume limiter
  209. MOSFET follower to my phone
  210. Crazy CMOY board
  211. starving student vs jonokuchi or hybrid vs tubes for hd600 and sr80i ?
  212. Tube/SS OTL single tube recommendations
  213. Pseudo Bravo headphone amplifier
  214. PUSH-PULL HEADPHONE AMP
  215. Single valve amp
  216. My desktop Objective2 amp
  217. O2 loud turn on transient fix help...
  218. Help wanted to find an old schematic
  219. Dual TPA6120A2 headphone design to eliminate crosstalk
  220. Need an AMP recommendation, and have a couple questions.
  221. Pot value in cmoy
  222. YAHA HELP
  223. OPA827 + Diamond Buffer
  224. newbie qustion
  225. Advice on USB Soundcard / USB DAC + Amplifier
  226. 6n2 + fu32 vacuum tube tube headphone amplifier
  227. Headphone amp recommendation required?
  228. Tube Headphone amplifier suggestions 2x(1:40) transformers
  229. Different grounding, different sound quality or what can be the problem?
  230. Radio Shack Digital to Analog Converter
  231. 2SC1815 alternative for Mini Zen
  232. Two-Way Headset Wiring
  233. whats worng with this circut
  234. Phono amp top slot board for O2 amplfier in B3 case
  235. Szekeres VE protection diodes?
  236. Headphone Amp Feels 'Electrified'
  237. Design Issue: Cascaded passive filer stages
  238. Headphone amp between source & amplifier - how to passthrough?
  239. Open Source Headphone Amplifier
  240. OPA2132/4 for headphones
  241. O2 LiPo Daughterboard
  242. Class AB with op-amp input, audible noise
  243. PCB check for a simple amp
  244. Home meade design AMP prob's
  245. Noise - how much is too much?
  246. Massively parallel LME49990 headamp
  247. Building the O2 - A novices build experience
  248. A Through-hole "Wire" Amp
  249. Adding a headphone output to CD PLAYER?
  250. Rod Elliot 113 - Headphone amp TOO MUCH GAIN

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