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  1. +/- 8/10V from 5V USB power converter
  2. Help choosing replacement headphones
  3. Bluetooth Headphones - Bluedio's "R+"
  4. Need help understanding current loops...
  5. Little-Bear B1 modding..
  6. Headphone amplifier using SJ2520
  7. Wich Over-Ear Headphones and a Soundcard or DAC/AMP Combo?
  8. How to DIY headphones?
  9. 19J6 Millett amp
  10. Valuable dual opa for headphones amp
  11. Need travel headphones < 300 dollars
  12. Objective + ODAC modifications
  13. Help my cmoy is popping caps
  14. SOHA II amp tripping
  15. cisco power supply, grounding and the Millett starving student
  16. cisco power supply, grounding and the Millett starving student
  17. Help Summing Two Headphone Outputs
  18. question re crossfeed for low imped phones
  19. 6DJ8 headphone amp
  20. THD vs bias voltage for ESL headphones
  21. Just for fun
  22. Creek OBH-21 SE problem
  23. Current source in diamond buffer
  24. Where do I start? (re: need a DIY amp project)
  25. 6N OCC 24awg single strand for headphones ?
  26. From amp w/ "bare wire" output to headphones...
  27. My new headphone amp
  28. Why are external amplifiers superior?
  29. Headphones and Hearing aids
  30. Reacheargeable CMoy Amp??
  31. Testing headphones
  32. Discrete op amp headphone amplifier module, based on Marantz
  33. Koss ESP9 Headphones Low Volume Fixed!
  34. Please help with DIY headphone amp.
  35. Huginn, High performance, Class A, Lateral FET headphone amplifier
  36. MAT12 / MAT14 based headphone amp
  37. DC servo for Sijosae Buffer
  38. connect two inverting op amps together
  39. Yet Another Cmoy - PCB layout with Eagle and making PCB
  40. How to prevent unwanted volume adjustments on volume knob of a portable amp
  41. Project Ember ?
  42. O2 and power questions...
  43. Beyerdynamic A1 clone gold, opamp rolling
  44. Is there a better way to implement buf634 other than place in a a loop?
  45. An early look at my new HPA design
  46. O2 XLR, St/Mono swtich, etc Mod. ?'s
  47. A question regarding bass boost and output buffers
  48. O2 headamp output booster PCB
  49. cMoybb op amp rolling with AD797BRZ
  50. Millett Hybrid Starving Student (12AU7)
  51. Good capacitors for cmoy
  52. mysterious headphones
  53. New 4 layer LME49610 Headphone Amplifier D1
  54. Simple Headphone's Amp for beginner
  55. upgrading x-can V1? anyone?
  56. Headphone Amps DIY for beginners
  57. some question about headphone amp (possibly the o2)
  58. Unknown Stax Headphones for SRD-7
  59. Moskido Hybrid headphone amplifier! Help needed
  60. Lowest capacitance hum-rejecting 4-wire headphone cable configuration
  61. Best amp possible for the hd-650
  62. Looking for a Headphone Amplifier
  63. Shure Earphones SE846
  64. Headphone equalization hardware and software
  65. VSSA FOR HEADPHONE
  66. pcb layout for grado ra1 ?
  67. grado ra1 clone
  68. Szekeres vs. PRR-SOL amplifier
  69. Optimal grounding
  70. 4 channel stereo mixer
  71. New PC setup.
  72. Class A Heaphone Amp
  73. DIY Headphone Tap + Passive Mixer
  74. Beats by Dr Dre headphones or alternative models/brands?
  75. In line sound limiter for headphones
  76. Adjustable Ear phone volume limiter
  77. MOSFET follower to my phone
  78. Crazy CMOY board
  79. starving student vs jonokuchi or hybrid vs tubes for hd600 and sr80i ?
  80. Tube/SS OTL single tube recommendations
  81. Pseudo Bravo headphone amplifier
  82. PUSH-PULL HEADPHONE AMP
  83. Single valve amp
  84. My desktop Objective2 amp
  85. O2 loud turn on transient fix help...
  86. Help wanted to find an old schematic
  87. Dual TPA6120A2 headphone design to eliminate crosstalk
  88. Need an AMP recommendation, and have a couple questions.
  89. Pot value in cmoy
  90. YAHA HELP
  91. OPA827 + Diamond Buffer
  92. newbie qustion
  93. Advice on USB Soundcard / USB DAC + Amplifier
  94. 6n2 + fu32 vacuum tube tube headphone amplifier
  95. Headphone amp recommendation required?
  96. Tube Headphone amplifier suggestions 2x(1:40) transformers
  97. Different grounding, different sound quality or what can be the problem?
  98. Radio Shack Digital to Analog Converter
  99. 2SC1815 alternative for Mini Zen
  100. Two-Way Headset Wiring
  101. whats worng with this circut
  102. Phono amp top slot board for O2 amplfier in B3 case
  103. Szekeres VE protection diodes?
  104. Headphone Amp Feels 'Electrified'
  105. Design Issue: Cascaded passive filer stages
  106. Headphone amp between source & amplifier - how to passthrough?
  107. Open Source Headphone Amplifier
  108. OPA2132/4 for headphones
  109. O2 LiPo Daughterboard
  110. Class AB with op-amp input, audible noise
  111. PCB check for a simple amp
  112. Home meade design AMP prob's
  113. Noise - how much is too much?
  114. Massively parallel LME49990 headamp
  115. Building the O2 - A novices build experience
  116. A Through-hole "Wire" Amp
  117. Adding a headphone output to CD PLAYER?
  118. Rod Elliot 113 - Headphone amp TOO MUCH GAIN
  119. Dual O2-Inspired, SMD Headphone Amp
  120. Low impedance phones, Please suggest amp design?
  121. Huge change in audio quality simply by changing the pads on headphones?
  122. what next, help please
  123. DIY isodynamic headphones?
  124. DIY replace jack plug: strange colors
  125. Canjam 2013 ?
  126. Can you disable DAC on O2 ODAC?
  127. Can i connect my sony pulse wireless heaset to a TV ?
  128. Audio controlled voltage mod.
  129. AKG K518
  130. Composite amplifier in class A
  131. A great Fostex T50RP amp?
  132. helmet speakers
  133. Ambisonics, and listening to binaural via speakers
  134. Cheap but linear headamp
  135. Thin Durable Flexible Wire to Fix Headphones
  136. If headphones are out-of-phase, can you hear it?
  137. Oatley K272 DC power options.
  138. A curious Inquiry involving internal headphone amp/powering multiple earbuds?
  139. recommend me a valve headphone amp - Beyer T1 & AKG Q701 etc
  140. HP amp out impedance vs. HP impedance
  141. O2 help with bass boost and 1/4 jack mods
  142. Anyone ever used LM4780 for headphones?
  143. Stax Type 1 headphone, anyone know what these are?
  144. DIY balanced headphone amp?
  145. Simple headphone amp from spare parts
  146. SENNHEISER HD800 Source Impedance
  147. TDA1308 - changing gain resistors
  148. Headphone Amp Selection?
  149. Classic v1 headphone amplifier
  150. RFI problems on diy headphone amp.
  151. power flickering on tube cmoy amp
  152. question about a circuit
  153. hello all is a dac worth buying
  154. Passive bell shaped EQ for headphones
  155. GLASS-SAND CLASS A TUBE MOSFET HYBRID HEADPHONE AMP
  156. HD650 can I fix this?
  157. Headphones Amplifier HIFI
  158. An "O3" - 35% smaller SMD RS O2 headphone amp version
  159. need help with headphones
  160. Moe'stevens O2
  161. Need help - using J A Burgess 45 SE amp for headphones
  162. Akai EIE Pro or Lexicon I-O|22 for AKGQ 701 [Specs inside]
  163. Power switch driver board(Momentary switch) + output relay board(delayed ON/fast OFF)
  164. OpAmps to drive HD650 from AK4399 Vout DAC
  165. Where to place current limit output resistor?
  166. Headphone amp noise. Help!
  167. USB DAC & headphone Amp with 3D Printed Enclosure
  168. DIY amp/DAC with better measurements than O2/ODAC?
  169. Battery powered 4W amp
  170. stuffing cotton balls in headphones?
  171. Measuring headphone FR?
  172. LM1875 based amp by Sijose
  173. A version of an O2 Desktop Amp (ODA)
  174. ESP P113 voltage gain of 1, will it work?
  175. The No Headphone Amp!
  176. Help Needed - Push Pull Transformer replacement
  177. Improving Bass Response On A Popular Hybrid Design
  178. Koss Esp-9 to ESP-9b Conversion... Help needed with grounding scheme
  179. High power headphone amp
  180. New Modular Headphone Amplifier
  181. full range planar headphones using neodynium magnets
  182. JLH Chiarra or Hifisonix Class A buffer?
  183. Sennhesier HD424
  184. 2-channel regular ground, dual mono or "balanced"/bridged?
  185. Jack Plug Wiring Help
  186. New Portable Amplifier Project started
  187. Pimeta V2 or O2?
  188. JLH Class A headphone amp from ETI not WW
  189. Left/Right Channel balancer
  190. Choosing a DC storage/rail cap for cmoy like amp
  191. Feedback resistor size - opamps
  192. Can I add a Potentiometer to these Headphones?
  193. Headphone distribution schematics
  194. Stax upgrade recomendations please.
  195. tube amp designs for low impedance headphones?
  196. headphone buffer/output for usb/dac
  197. Personal EQ & AMP for Hearing loss
  198. Grado RS1 headphones
  199. MOSFET Headphone Amplifier
  200. Lehmann clones
  201. which amplifier kit on ebay?
  202. Koss HV/1LC - specifications
  203. Headphone maximum power
  204. Output device for SE Hybrid Headphone Amp
  205. Output impedance as compensation?
  206. New Headphone Amp kit supplier in OZ
  207. suggestion for a 200$ headamp
  208. Replace Blackbox m10 3-prong jack
  209. Sony MDR-V6 changed?
  210. New portable amplifier
  211. New portable amplifier
  212. Stax SRM-212 repair?
  213. Audiophile Gear vs. ODAC/O2 (DAC’s and Amp’s)
  214. Sennheiser HD650 vs AKG Q701 QJ
  215. Split-supply portable headphone amp / DAC
  216. A47 / Crystal CMoy
  217. Electrostatic Headphones
  218. akg k140 earpads
  219. Which design is better for portable linear amplification?
  220. Midgård, compact, low distortion, high quality, Class A Lateral FET headamp
  221. Copper for Headphone Amp Chassis
  222. The DAO SE all-FET Class-A ZGF Headphone Amplifier
  223. What is this?!
  224. Background noise - tube amp
  225. Am the only one who's not deaf....?
  226. Grado GS1000 died
  227. lme49600 buffering the output of a generic soundcard
  228. LMH6643 amplifier
  229. Balanced input headphone amp
  230. Rigs test
  231. Kevin Gilmore KGSSHV boards
  232. Universal Headphone Amp - fits different headphones
  233. Headphone distribution block (passive)
  234. Calculating audio transformer losses?
  235. O2 headphone amp with 4x 8.4V cells
  236. how to mix sound from notebook and external sound card and get headphones output
  237. Koss HV/1LC foam Ear Pads
  238. Any DIY/Upgrade Components Ideas for Bravo Audio V2 12AU7 HeadAmp?
  239. Class A mosfet headphone amplifier. How does it look?
  240. Headphone Connections
  241. Headphones
  242. my new MING DA MC300-EAR headphone. Would like your suggestions.
  243. Best Sounding AMP for IMOD ( Modded ipod ) LOD
  244. Any point in adding a audio transformer for more power?
  245. Convert Low V Aikido line stage to headphone use?
  246. Balder, OPA2134+BUF634 Headphone Amplifier
  247. A good Headphone Amp for AKG K240DF anybody? It's 88dB and 600ohm, Thank you.
  248. Converting an Amp to Balanced XLR
  249. Calculating output impedance of Morgan-Jones headphone amp?
  250. norrisr

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