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  1. Diy headphone options for AKG k701's
  2. OPA2134 Input Stage...
  3. OPA2134+LM6172 composite amp ?
  4. dual purpose amp question.
  5. importance of output impedance for headphones?
  6. AKG 601 cable really BI-WIRE?
  7. OP-amp getting hot
  8. Headphone Amplifier project
  9. Modifying the SMSL SAP VI for low impedance headphones
  10. artwork on cans?
  11. My first Desktop HPA
  12. Volume control
  13. Best way to implement a voltage gain stage with opamp?
  14. DIY HEADPHONES
  15. Audeze LCD poor comfort – any mods?
  16. Headphone capsules: OEM stuff
  17. OPA2134/IRF510 Schematic...
  18. Need Headphone Amp Schematic for NJM4556
  19. Headphones for me, speakers for wife
  20. Headphone amp level = line level? (Maybe obvious question)
  21. My first HPA design...comments please!
  22. Transparent & Objective: My Objective 2 build
  23. My O2 Portable Amp
  24. O2 Front Panel
  25. My LM5532 Headphone Amplifier project
  26. CMOY with Common Collector Buffer
  27. CMoy Desktop with Buffers
  28. Objective o2 diy no sound
  29. Cmoy help please!
  30. µCmoy - My take on the portable CMoy amp
  31. My Headphone amp. Very diy...
  32. Opa2134 Max. Power dissipation
  33. 49600 single ended amp; I blew up the output caps!
  34. MultiLoop Amp Output impedance
  35. Need a small amplifier
  36. OPA2134 in parallel
  37. Desktop Cmoy with NJM4556 Buffers
  38. Portable headphone amp
  39. NJM4556 Output Impedance
  40. TPA6120A2 Input Bias Voltage Protection
  41. geek Wave DAP
  42. HPA-1 Class A Headphone Amplifier
  43. Very good Headphone Amplifier
  44. CMOY problem - any ideas welcome
  45. CMOY problem - any ideas welcome
  46. CMOY issues - all ideas welcome
  47. HELP: tuning for AKG601 + MJ mini tube amp
  48. Crosstalk issue with homebrew headphone amps
  49. A composite with LT1210 - another way of doing it
  50. CMoy Opa2134 minimum Gain
  51. Cmoy vs Chipamps
  52. DIY portable USB headphone AMP/DAC- recommended ICs?
  53. My first amp!
  54. Pot before a high pass filter
  55. CMoy Mod for drive speakers
  56. Old School tda2003 Headphone amp
  57. Noobie looking for a cheap heaphones amp
  58. Headphone amp from AN-272 Op Amp Booster Designs
  59. Elektor improved headphone preamp. Is it good quality?
  60. Cmoy with RA input?
  61. GAMECOM Headphone Cable
  62. Stereo crosstalk gets worse with frequency?
  63. Decware ZKIT3 Clipping
  64. WARNING hillyhifi
  65. 49600 Electrostatic Discharge Concerns
  66. So, your Grados are too bright?
  67. o2 flush gain switch?
  68. clip on heat sinks for TO-263
  69. Looking for a closed HP driver
  70. Headphone amp with RCA bypass grounding
  71. About Crossfeed concept
  72. Optimizing a TPA6120a2 layout
  73. Quality 6.35mm Stereo Headphone Socket?
  74. cmoy amp suggestions
  75. simple, high performance amp using DRV134?
  76. General Headphone Amplifier Survey
  77. O2 headamp PM latch PC board to stop O2 low battery buzzing
  78. Headphone system - volume pot placement.
  79. 2 wires for Return Terminal and 1 wire for (+) Terminal in EXPENSIVE Headphone cable
  80. Too simple MOSFET ESL amplifier
  81. summing to mono
  82. Inexpensive O2 faceplates on Ebay
  83. Headphone amp on perfboard: layout critics welcome
  84. *For Sale* objective 2 Failed to launch *For Sale*
  85. Producing Headphones
  86. Need help building a headphone relay
  87. Low cost Stax headphone amplifier
  88. Douglas self_Ground cancelling & 0-impedance ??
  89. 3,5 to RCA cable
  90. RJM Sapphire build thread:
  91. Mistakenly ordered a 100k pot for O2 amp.
  92. Broskie Headphone Amp - frequency response
  93. Brig, any thoughts?
  94. Help with volume independent humming...
  95. Benchmark headphone amp-white paper by John S.
  96. Simplest headphone amp circuit (something like you'd get in a walkman or MP3 player)?
  97. ATTN: Beyerdynamic owners
  98. new opamps break in
  99. 32 Ohm- actual impedance at diff. frequencies?
  100. Gilberd headphone amplifier
  101. Acoustics in closed vs. open design confusing - help needed!
  102. O2 amp troubleshooting - help a newbie!
  103. Headphones for music production
  104. Headphone Data Sheet Table with power, voltage & current
  105. Headphone amp also used as preamp for long cable
  106. ground question
  107. Adventures in Headamp Country
  108. GIBRID TELEFONE AMP.
  109. Grado SR60 and a near field sub
  110. SCHURTER - 4802.2330 - SOCKET, 3.5MM JACK, PCB, 3POLE
  111. Receiver Headphone output - modifications?
  112. Headphone amplifier that runs on 5V?
  113. Headphones that pick up FM transmitted stations?
  114. Components for KA2209 headphone amplifier?
  115. stereo jacks look dangerous!
  116. Minimal headphone circuit.
  117. +/- 8/10V from 5V USB power converter
  118. Help choosing replacement headphones
  119. Bluetooth Headphones - Bluedio's "R+"
  120. Need help understanding current loops...
  121. Little-Bear B1 modding..
  122. Headphone amplifier using SJ2520
  123. Wich Over-Ear Headphones and a Soundcard or DAC/AMP Combo?
  124. How to DIY headphones?
  125. 19J6 Millett amp
  126. Valuable dual opa for headphones amp
  127. Need travel headphones < 300 dollars
  128. Objective + ODAC modifications
  129. Help my cmoy is popping caps
  130. SOHA II amp tripping
  131. cisco power supply, grounding and the Millett starving student
  132. cisco power supply, grounding and the Millett starving student
  133. Help Summing Two Headphone Outputs
  134. question re crossfeed for low imped phones
  135. 6DJ8 headphone amp
  136. THD vs bias voltage for ESL headphones
  137. Just for fun
  138. Creek OBH-21 SE problem
  139. Current source in diamond buffer
  140. Where do I start? (re: need a DIY amp project)
  141. 6N OCC 24awg single strand for headphones ?
  142. From amp w/ "bare wire" output to headphones...
  143. My new headphone amp
  144. Why are external amplifiers superior?
  145. Headphones and Hearing aids
  146. Reacheargeable CMoy Amp??
  147. Testing headphones
  148. Discrete op amp headphone amplifier module, based on Marantz
  149. Koss ESP9 Headphones Low Volume Fixed!
  150. Please help with DIY headphone amp.
  151. Huginn, High performance, Class A, Lateral FET headphone amplifier
  152. MAT12 / MAT14 based headphone amp
  153. DC servo for Sijosae Buffer
  154. connect two inverting op amps together
  155. Yet Another Cmoy - PCB layout with Eagle and making PCB
  156. How to prevent unwanted volume adjustments on volume knob of a portable amp
  157. Project Ember ?
  158. O2 and power questions...
  159. Beyerdynamic A1 clone gold, opamp rolling
  160. Is there a better way to implement buf634 other than place in a a loop?
  161. An early look at my new HPA design
  162. O2 XLR, St/Mono swtich, etc Mod. ?'s
  163. A question regarding bass boost and output buffers
  164. O2 headamp output booster PCB
  165. cMoybb op amp rolling with AD797BRZ
  166. Millett Hybrid Starving Student (12AU7)
  167. Good capacitors for cmoy
  168. mysterious headphones
  169. New 4 layer LME49610 Headphone Amplifier D1
  170. Simple Headphone's Amp for beginner
  171. upgrading x-can V1? anyone?
  172. Headphone Amps DIY for beginners
  173. some question about headphone amp (possibly the o2)
  174. Unknown Stax Headphones for SRD-7
  175. Moskido Hybrid headphone amplifier! Help needed
  176. Lowest capacitance hum-rejecting 4-wire headphone cable configuration
  177. Best amp possible for the hd-650
  178. Looking for a Headphone Amplifier
  179. Shure Earphones SE846
  180. Headphone equalization hardware and software
  181. VSSA FOR HEADPHONE
  182. pcb layout for grado ra1 ?
  183. grado ra1 clone
  184. Szekeres vs. PRR-SOL amplifier
  185. Optimal grounding
  186. 4 channel stereo mixer
  187. New PC setup.
  188. Class A Heaphone Amp
  189. DIY Headphone Tap + Passive Mixer
  190. Beats by Dr Dre headphones or alternative models/brands?
  191. In line sound limiter for headphones
  192. Adjustable Ear phone volume limiter
  193. MOSFET follower to my phone
  194. Crazy CMOY board
  195. starving student vs jonokuchi or hybrid vs tubes for hd600 and sr80i ?
  196. Tube/SS OTL single tube recommendations
  197. Pseudo Bravo headphone amplifier
  198. PUSH-PULL HEADPHONE AMP
  199. Single valve amp
  200. My desktop Objective2 amp
  201. O2 loud turn on transient fix help...
  202. Help wanted to find an old schematic
  203. Dual TPA6120A2 headphone design to eliminate crosstalk
  204. Need an AMP recommendation, and have a couple questions.
  205. Pot value in cmoy
  206. YAHA HELP
  207. OPA827 + Diamond Buffer
  208. newbie qustion
  209. Advice on USB Soundcard / USB DAC + Amplifier
  210. 6n2 + fu32 vacuum tube tube headphone amplifier
  211. Headphone amp recommendation required?
  212. Tube Headphone amplifier suggestions 2x(1:40) transformers
  213. Different grounding, different sound quality or what can be the problem?
  214. Radio Shack Digital to Analog Converter
  215. 2SC1815 alternative for Mini Zen
  216. Two-Way Headset Wiring
  217. whats worng with this circut
  218. Phono amp top slot board for O2 amplfier in B3 case
  219. Szekeres VE protection diodes?
  220. Headphone Amp Feels 'Electrified'
  221. Design Issue: Cascaded passive filer stages
  222. Headphone amp between source & amplifier - how to passthrough?
  223. Open Source Headphone Amplifier
  224. OPA2132/4 for headphones
  225. O2 LiPo Daughterboard
  226. Class AB with op-amp input, audible noise
  227. PCB check for a simple amp
  228. Home meade design AMP prob's
  229. Noise - how much is too much?
  230. Massively parallel LME49990 headamp
  231. Building the O2 - A novices build experience
  232. A Through-hole "Wire" Amp
  233. Adding a headphone output to CD PLAYER?
  234. Rod Elliot 113 - Headphone amp TOO MUCH GAIN
  235. Dual O2-Inspired, SMD Headphone Amp
  236. Low impedance phones, Please suggest amp design?
  237. Huge change in audio quality simply by changing the pads on headphones?
  238. what next, help please
  239. DIY isodynamic headphones?
  240. DIY replace jack plug: strange colors
  241. Canjam 2013 ?
  242. Can you disable DAC on O2 ODAC?
  243. Can i connect my sony pulse wireless heaset to a TV ?
  244. Audio controlled voltage mod.
  245. AKG K518
  246. Composite amplifier in class A
  247. A great Fostex T50RP amp?
  248. helmet speakers
  249. Ambisonics, and listening to binaural via speakers
  250. Cheap but linear headamp

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