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  1. Headphone amp on perfboard: layout critics welcome
  2. *For Sale* objective 2 Failed to launch *For Sale*
  3. Producing Headphones
  4. Need help building a headphone relay
  5. Low cost Stax headphone amplifier
  6. Douglas self_Ground cancelling & 0-impedance ??
  7. 3,5 to RCA cable
  8. RJM Sapphire build thread:
  9. Mistakenly ordered a 100k pot for O2 amp.
  10. Broskie Headphone Amp - frequency response
  11. Brig, any thoughts?
  12. Help with volume independent humming...
  13. Benchmark headphone amp-white paper by John S.
  14. Simplest headphone amp circuit (something like you'd get in a walkman or MP3 player)?
  15. ATTN: Beyerdynamic owners
  16. new opamps break in
  17. 32 Ohm- actual impedance at diff. frequencies?
  18. Gilberd headphone amplifier
  19. Acoustics in closed vs. open design confusing - help needed!
  20. O2 amp troubleshooting - help a newbie!
  21. Headphones for music production
  22. Headphone Data Sheet Table with power, voltage & current
  23. Headphone amp also used as preamp for long cable
  24. ground question
  25. Adventures in Headamp Country
  26. GIBRID TELEFONE AMP.
  27. Grado SR60 and a near field sub
  28. SCHURTER - 4802.2330 - SOCKET, 3.5MM JACK, PCB, 3POLE
  29. Receiver Headphone output - modifications?
  30. Headphone amplifier that runs on 5V?
  31. Headphones that pick up FM transmitted stations?
  32. Components for KA2209 headphone amplifier?
  33. stereo jacks look dangerous!
  34. Minimal headphone circuit.
  35. +/- 8/10V from 5V USB power converter
  36. Help choosing replacement headphones
  37. Bluetooth Headphones - Bluedio's "R+"
  38. Need help understanding current loops...
  39. Little-Bear B1 modding..
  40. Headphone amplifier using SJ2520
  41. Wich Over-Ear Headphones and a Soundcard or DAC/AMP Combo?
  42. How to DIY headphones?
  43. 19J6 Millett amp
  44. Valuable dual opa for headphones amp
  45. Need travel headphones < 300 dollars
  46. Objective + ODAC modifications
  47. Help my cmoy is popping caps
  48. SOHA II amp tripping
  49. cisco power supply, grounding and the Millett starving student
  50. cisco power supply, grounding and the Millett starving student
  51. Help Summing Two Headphone Outputs
  52. question re crossfeed for low imped phones
  53. 6DJ8 headphone amp
  54. THD vs bias voltage for ESL headphones
  55. Just for fun
  56. Creek OBH-21 SE problem
  57. Current source in diamond buffer
  58. Where do I start? (re: need a DIY amp project)
  59. 6N OCC 24awg single strand for headphones ?
  60. From amp w/ "bare wire" output to headphones...
  61. My new headphone amp
  62. Why are external amplifiers superior?
  63. Headphones and Hearing aids
  64. Reacheargeable CMoy Amp??
  65. Testing headphones
  66. Discrete op amp headphone amplifier module, based on Marantz
  67. Koss ESP9 Headphones Low Volume Fixed!
  68. Please help with DIY headphone amp.
  69. Huginn, High performance, Class A, Lateral FET headphone amplifier
  70. MAT12 / MAT14 based headphone amp
  71. DC servo for Sijosae Buffer
  72. connect two inverting op amps together
  73. Yet Another Cmoy - PCB layout with Eagle and making PCB
  74. How to prevent unwanted volume adjustments on volume knob of a portable amp
  75. Project Ember ?
  76. O2 and power questions...
  77. Beyerdynamic A1 clone gold, opamp rolling
  78. Is there a better way to implement buf634 other than place in a a loop?
  79. An early look at my new HPA design
  80. O2 XLR, St/Mono swtich, etc Mod. ?'s
  81. A question regarding bass boost and output buffers
  82. O2 headamp output booster PCB
  83. cMoybb op amp rolling with AD797BRZ
  84. Millett Hybrid Starving Student (12AU7)
  85. Good capacitors for cmoy
  86. mysterious headphones
  87. New 4 layer LME49610 Headphone Amplifier D1
  88. Simple Headphone's Amp for beginner
  89. upgrading x-can V1? anyone?
  90. Headphone Amps DIY for beginners
  91. some question about headphone amp (possibly the o2)
  92. Unknown Stax Headphones for SRD-7
  93. Moskido Hybrid headphone amplifier! Help needed
  94. Lowest capacitance hum-rejecting 4-wire headphone cable configuration
  95. Best amp possible for the hd-650
  96. Looking for a Headphone Amplifier
  97. Shure Earphones SE846
  98. Headphone equalization hardware and software
  99. VSSA FOR HEADPHONE
  100. pcb layout for grado ra1 ?
  101. grado ra1 clone
  102. Szekeres vs. PRR-SOL amplifier
  103. Optimal grounding
  104. 4 channel stereo mixer
  105. New PC setup.
  106. Class A Heaphone Amp
  107. DIY Headphone Tap + Passive Mixer
  108. Beats by Dr Dre headphones or alternative models/brands?
  109. In line sound limiter for headphones
  110. Adjustable Ear phone volume limiter
  111. MOSFET follower to my phone
  112. Crazy CMOY board
  113. starving student vs jonokuchi or hybrid vs tubes for hd600 and sr80i ?
  114. Tube/SS OTL single tube recommendations
  115. Pseudo Bravo headphone amplifier
  116. PUSH-PULL HEADPHONE AMP
  117. Single valve amp
  118. My desktop Objective2 amp
  119. O2 loud turn on transient fix help...
  120. Help wanted to find an old schematic
  121. Dual TPA6120A2 headphone design to eliminate crosstalk
  122. Need an AMP recommendation, and have a couple questions.
  123. Pot value in cmoy
  124. YAHA HELP
  125. OPA827 + Diamond Buffer
  126. newbie qustion
  127. Advice on USB Soundcard / USB DAC + Amplifier
  128. 6n2 + fu32 vacuum tube tube headphone amplifier
  129. Headphone amp recommendation required?
  130. Tube Headphone amplifier suggestions 2x(1:40) transformers
  131. Different grounding, different sound quality or what can be the problem?
  132. Radio Shack Digital to Analog Converter
  133. 2SC1815 alternative for Mini Zen
  134. Two-Way Headset Wiring
  135. whats worng with this circut
  136. Phono amp top slot board for O2 amplfier in B3 case
  137. Szekeres VE protection diodes?
  138. Headphone Amp Feels 'Electrified'
  139. Design Issue: Cascaded passive filer stages
  140. Headphone amp between source & amplifier - how to passthrough?
  141. Open Source Headphone Amplifier
  142. OPA2132/4 for headphones
  143. O2 LiPo Daughterboard
  144. Class AB with op-amp input, audible noise
  145. PCB check for a simple amp
  146. Home meade design AMP prob's
  147. Noise - how much is too much?
  148. Massively parallel LME49990 headamp
  149. Building the O2 - A novices build experience
  150. A Through-hole "Wire" Amp
  151. Adding a headphone output to CD PLAYER?
  152. Rod Elliot 113 - Headphone amp TOO MUCH GAIN
  153. Dual O2-Inspired, SMD Headphone Amp
  154. Low impedance phones, Please suggest amp design?
  155. Huge change in audio quality simply by changing the pads on headphones?
  156. what next, help please
  157. DIY isodynamic headphones?
  158. DIY replace jack plug: strange colors
  159. Canjam 2013 ?
  160. Can you disable DAC on O2 ODAC?
  161. Can i connect my sony pulse wireless heaset to a TV ?
  162. Audio controlled voltage mod.
  163. AKG K518
  164. Composite amplifier in class A
  165. A great Fostex T50RP amp?
  166. helmet speakers
  167. Ambisonics, and listening to binaural via speakers
  168. Cheap but linear headamp
  169. Thin Durable Flexible Wire to Fix Headphones
  170. If headphones are out-of-phase, can you hear it?
  171. Oatley K272 DC power options.
  172. A curious Inquiry involving internal headphone amp/powering multiple earbuds?
  173. recommend me a valve headphone amp - Beyer T1 & AKG Q701 etc
  174. HP amp out impedance vs. HP impedance
  175. O2 help with bass boost and 1/4 jack mods
  176. Anyone ever used LM4780 for headphones?
  177. Stax Type 1 headphone, anyone know what these are?
  178. DIY balanced headphone amp?
  179. Simple headphone amp from spare parts
  180. SENNHEISER HD800 Source Impedance
  181. TDA1308 - changing gain resistors
  182. Headphone Amp Selection?
  183. Classic v1 headphone amplifier
  184. RFI problems on diy headphone amp.
  185. power flickering on tube cmoy amp
  186. question about a circuit
  187. hello all is a dac worth buying
  188. Passive bell shaped EQ for headphones
  189. GLASS-SAND CLASS A TUBE MOSFET HYBRID HEADPHONE AMP
  190. HD650 can I fix this?
  191. Headphones Amplifier HIFI
  192. An "O3" - 35% smaller SMD RS O2 headphone amp version
  193. need help with headphones
  194. Moe'stevens O2
  195. Need help - using J A Burgess 45 SE amp for headphones
  196. Akai EIE Pro or Lexicon I-O|22 for AKGQ 701 [Specs inside]
  197. Power switch driver board(Momentary switch) + output relay board(delayed ON/fast OFF)
  198. OpAmps to drive HD650 from AK4399 Vout DAC
  199. Where to place current limit output resistor?
  200. Headphone amp noise. Help!
  201. USB DAC & headphone Amp with 3D Printed Enclosure
  202. DIY amp/DAC with better measurements than O2/ODAC?
  203. Battery powered 4W amp
  204. stuffing cotton balls in headphones?
  205. Measuring headphone FR?
  206. LM1875 based amp by Sijose
  207. A version of an O2 Desktop Amp (ODA)
  208. ESP P113 voltage gain of 1, will it work?
  209. The No Headphone Amp!
  210. Help Needed - Push Pull Transformer replacement
  211. Improving Bass Response On A Popular Hybrid Design
  212. Koss Esp-9 to ESP-9b Conversion... Help needed with grounding scheme
  213. High power headphone amp
  214. New Modular Headphone Amplifier
  215. full range planar headphones using neodynium magnets
  216. JLH Chiarra or Hifisonix Class A buffer?
  217. Sennhesier HD424
  218. 2-channel regular ground, dual mono or "balanced"/bridged?
  219. Jack Plug Wiring Help
  220. New Portable Amplifier Project started
  221. Pimeta V2 or O2?
  222. JLH Class A headphone amp from ETI not WW
  223. Left/Right Channel balancer
  224. Choosing a DC storage/rail cap for cmoy like amp
  225. Feedback resistor size - opamps
  226. Can I add a Potentiometer to these Headphones?
  227. Headphone distribution schematics
  228. Stax upgrade recomendations please.
  229. tube amp designs for low impedance headphones?
  230. headphone buffer/output for usb/dac
  231. Personal EQ & AMP for Hearing loss
  232. Grado RS1 headphones
  233. MOSFET Headphone Amplifier
  234. Lehmann clones
  235. which amplifier kit on ebay?
  236. Koss HV/1LC - specifications
  237. Headphone maximum power
  238. Output device for SE Hybrid Headphone Amp
  239. Output impedance as compensation?
  240. New Headphone Amp kit supplier in OZ
  241. suggestion for a 200$ headamp
  242. Replace Blackbox m10 3-prong jack
  243. Sony MDR-V6 changed?
  244. New portable amplifier
  245. New portable amplifier
  246. Stax SRM-212 repair?
  247. Audiophile Gear vs. ODAC/O2 (DACís and Ampís)
  248. Sennheiser HD650 vs AKG Q701 QJ
  249. Split-supply portable headphone amp / DAC
  250. A47 / Crystal CMoy

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