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  1. 3,5 to RCA cable
  2. RJM Sapphire build thread:
  3. Mistakenly ordered a 100k pot for O2 amp.
  4. Broskie Headphone Amp - frequency response
  5. Brig, any thoughts?
  6. Help with volume independent humming...
  7. Benchmark headphone amp-white paper by John S.
  8. Simplest headphone amp circuit (something like you'd get in a walkman or MP3 player)?
  9. ATTN: Beyerdynamic owners
  10. new opamps break in
  11. 32 Ohm- actual impedance at diff. frequencies?
  12. Gilberd headphone amplifier
  13. Acoustics in closed vs. open design confusing - help needed!
  14. O2 amp troubleshooting - help a newbie!
  15. Headphones for music production
  16. Headphone Data Sheet Table with power, voltage & current
  17. Headphone amp also used as preamp for long cable
  18. ground question
  19. Adventures in Headamp Country
  20. GIBRID TELEFONE AMP.
  21. Grado SR60 and a near field sub
  22. SCHURTER - 4802.2330 - SOCKET, 3.5MM JACK, PCB, 3POLE
  23. Receiver Headphone output - modifications?
  24. Headphone amplifier that runs on 5V?
  25. Headphones that pick up FM transmitted stations?
  26. Components for KA2209 headphone amplifier?
  27. stereo jacks look dangerous!
  28. Minimal headphone circuit.
  29. +/- 8/10V from 5V USB power converter
  30. Help choosing replacement headphones
  31. Bluetooth Headphones - Bluedio's "R+"
  32. Need help understanding current loops...
  33. Little-Bear B1 modding..
  34. Headphone amplifier using SJ2520
  35. Wich Over-Ear Headphones and a Soundcard or DAC/AMP Combo?
  36. How to DIY headphones?
  37. 19J6 Millett amp
  38. Valuable dual opa for headphones amp
  39. Need travel headphones < 300 dollars
  40. Objective + ODAC modifications
  41. Help my cmoy is popping caps
  42. SOHA II amp tripping
  43. cisco power supply, grounding and the Millett starving student
  44. cisco power supply, grounding and the Millett starving student
  45. Help Summing Two Headphone Outputs
  46. question re crossfeed for low imped phones
  47. 6DJ8 headphone amp
  48. THD vs bias voltage for ESL headphones
  49. Just for fun
  50. Creek OBH-21 SE problem
  51. Current source in diamond buffer
  52. Where do I start? (re: need a DIY amp project)
  53. 6N OCC 24awg single strand for headphones ?
  54. From amp w/ "bare wire" output to headphones...
  55. My new headphone amp
  56. Why are external amplifiers superior?
  57. Headphones and Hearing aids
  58. Reacheargeable CMoy Amp??
  59. Testing headphones
  60. Discrete op amp headphone amplifier module, based on Marantz
  61. Koss ESP9 Headphones Low Volume Fixed!
  62. Please help with DIY headphone amp.
  63. Huginn, High performance, Class A, Lateral FET headphone amplifier
  64. MAT12 / MAT14 based headphone amp
  65. DC servo for Sijosae Buffer
  66. connect two inverting op amps together
  67. Yet Another Cmoy - PCB layout with Eagle and making PCB
  68. How to prevent unwanted volume adjustments on volume knob of a portable amp
  69. Project Ember ?
  70. O2 and power questions...
  71. Beyerdynamic A1 clone gold, opamp rolling
  72. Is there a better way to implement buf634 other than place in a a loop?
  73. An early look at my new HPA design
  74. O2 XLR, St/Mono swtich, etc Mod. ?'s
  75. A question regarding bass boost and output buffers
  76. O2 headamp output booster PCB
  77. cMoybb op amp rolling with AD797BRZ
  78. Millett Hybrid Starving Student (12AU7)
  79. Good capacitors for cmoy
  80. mysterious headphones
  81. New 4 layer LME49610 Headphone Amplifier D1
  82. Simple Headphone's Amp for beginner
  83. upgrading x-can V1? anyone?
  84. Headphone Amps DIY for beginners
  85. some question about headphone amp (possibly the o2)
  86. Unknown Stax Headphones for SRD-7
  87. Moskido Hybrid headphone amplifier! Help needed
  88. Lowest capacitance hum-rejecting 4-wire headphone cable configuration
  89. Best amp possible for the hd-650
  90. Looking for a Headphone Amplifier
  91. Shure Earphones SE846
  92. Headphone equalization hardware and software
  93. VSSA FOR HEADPHONE
  94. pcb layout for grado ra1 ?
  95. grado ra1 clone
  96. Szekeres vs. PRR-SOL amplifier
  97. Optimal grounding
  98. 4 channel stereo mixer
  99. New PC setup.
  100. Class A Heaphone Amp
  101. DIY Headphone Tap + Passive Mixer
  102. Beats by Dr Dre headphones or alternative models/brands?
  103. In line sound limiter for headphones
  104. Adjustable Ear phone volume limiter
  105. MOSFET follower to my phone
  106. Crazy CMOY board
  107. starving student vs jonokuchi or hybrid vs tubes for hd600 and sr80i ?
  108. Tube/SS OTL single tube recommendations
  109. Pseudo Bravo headphone amplifier
  110. PUSH-PULL HEADPHONE AMP
  111. Single valve amp
  112. My desktop Objective2 amp
  113. O2 loud turn on transient fix help...
  114. Help wanted to find an old schematic
  115. Dual TPA6120A2 headphone design to eliminate crosstalk
  116. Need an AMP recommendation, and have a couple questions.
  117. Pot value in cmoy
  118. YAHA HELP
  119. OPA827 + Diamond Buffer
  120. newbie qustion
  121. Advice on USB Soundcard / USB DAC + Amplifier
  122. 6n2 + fu32 vacuum tube tube headphone amplifier
  123. Headphone amp recommendation required?
  124. Tube Headphone amplifier suggestions 2x(1:40) transformers
  125. Different grounding, different sound quality or what can be the problem?
  126. Radio Shack Digital to Analog Converter
  127. 2SC1815 alternative for Mini Zen
  128. Two-Way Headset Wiring
  129. whats worng with this circut
  130. Phono amp top slot board for O2 amplfier in B3 case
  131. Szekeres VE protection diodes?
  132. Headphone Amp Feels 'Electrified'
  133. Design Issue: Cascaded passive filer stages
  134. Headphone amp between source & amplifier - how to passthrough?
  135. Open Source Headphone Amplifier
  136. OPA2132/4 for headphones
  137. O2 LiPo Daughterboard
  138. Class AB with op-amp input, audible noise
  139. PCB check for a simple amp
  140. Home meade design AMP prob's
  141. Noise - how much is too much?
  142. Massively parallel LME49990 headamp
  143. Building the O2 - A novices build experience
  144. A Through-hole "Wire" Amp
  145. Adding a headphone output to CD PLAYER?
  146. Rod Elliot 113 - Headphone amp TOO MUCH GAIN
  147. Dual O2-Inspired, SMD Headphone Amp
  148. Low impedance phones, Please suggest amp design?
  149. Huge change in audio quality simply by changing the pads on headphones?
  150. what next, help please
  151. DIY isodynamic headphones?
  152. DIY replace jack plug: strange colors
  153. Canjam 2013 ?
  154. Can you disable DAC on O2 ODAC?
  155. Can i connect my sony pulse wireless heaset to a TV ?
  156. Audio controlled voltage mod.
  157. AKG K518
  158. Composite amplifier in class A
  159. A great Fostex T50RP amp?
  160. helmet speakers
  161. Ambisonics, and listening to binaural via speakers
  162. Cheap but linear headamp
  163. Thin Durable Flexible Wire to Fix Headphones
  164. If headphones are out-of-phase, can you hear it?
  165. Oatley K272 DC power options.
  166. A curious Inquiry involving internal headphone amp/powering multiple earbuds?
  167. recommend me a valve headphone amp - Beyer T1 & AKG Q701 etc
  168. HP amp out impedance vs. HP impedance
  169. O2 help with bass boost and 1/4 jack mods
  170. Anyone ever used LM4780 for headphones?
  171. Stax Type 1 headphone, anyone know what these are?
  172. DIY balanced headphone amp?
  173. Simple headphone amp from spare parts
  174. SENNHEISER HD800 Source Impedance
  175. TDA1308 - changing gain resistors
  176. Headphone Amp Selection?
  177. Classic v1 headphone amplifier
  178. RFI problems on diy headphone amp.
  179. power flickering on tube cmoy amp
  180. question about a circuit
  181. hello all is a dac worth buying
  182. Passive bell shaped EQ for headphones
  183. GLASS-SAND CLASS A TUBE MOSFET HYBRID HEADPHONE AMP
  184. HD650 can I fix this?
  185. Headphones Amplifier HIFI
  186. An "O3" - 35% smaller SMD RS O2 headphone amp version
  187. need help with headphones
  188. Moe'stevens O2
  189. Need help - using J A Burgess 45 SE amp for headphones
  190. Akai EIE Pro or Lexicon I-O|22 for AKGQ 701 [Specs inside]
  191. Power switch driver board(Momentary switch) + output relay board(delayed ON/fast OFF)
  192. OpAmps to drive HD650 from AK4399 Vout DAC
  193. Where to place current limit output resistor?
  194. Headphone amp noise. Help!
  195. USB DAC & headphone Amp with 3D Printed Enclosure
  196. DIY amp/DAC with better measurements than O2/ODAC?
  197. Battery powered 4W amp
  198. stuffing cotton balls in headphones?
  199. Measuring headphone FR?
  200. LM1875 based amp by Sijose
  201. A version of an O2 Desktop Amp (ODA)
  202. ESP P113 voltage gain of 1, will it work?
  203. The No Headphone Amp!
  204. Help Needed - Push Pull Transformer replacement
  205. Improving Bass Response On A Popular Hybrid Design
  206. Koss Esp-9 to ESP-9b Conversion... Help needed with grounding scheme
  207. High power headphone amp
  208. New Modular Headphone Amplifier
  209. full range planar headphones using neodynium magnets
  210. JLH Chiarra or Hifisonix Class A buffer?
  211. Sennhesier HD424
  212. 2-channel regular ground, dual mono or "balanced"/bridged?
  213. Jack Plug Wiring Help
  214. New Portable Amplifier Project started
  215. Pimeta V2 or O2?
  216. JLH Class A headphone amp from ETI not WW
  217. Left/Right Channel balancer
  218. Choosing a DC storage/rail cap for cmoy like amp
  219. Feedback resistor size - opamps
  220. Can I add a Potentiometer to these Headphones?
  221. Headphone distribution schematics
  222. Stax upgrade recomendations please.
  223. tube amp designs for low impedance headphones?
  224. headphone buffer/output for usb/dac
  225. Personal EQ & AMP for Hearing loss
  226. Grado RS1 headphones
  227. MOSFET Headphone Amplifier
  228. Lehmann clones
  229. which amplifier kit on ebay?
  230. Koss HV/1LC - specifications
  231. Headphone maximum power
  232. Output device for SE Hybrid Headphone Amp
  233. Output impedance as compensation?
  234. New Headphone Amp kit supplier in OZ
  235. suggestion for a 200$ headamp
  236. Replace Blackbox m10 3-prong jack
  237. Sony MDR-V6 changed?
  238. New portable amplifier
  239. New portable amplifier
  240. Stax SRM-212 repair?
  241. Audiophile Gear vs. ODAC/O2 (DAC’s and Amp’s)
  242. Sennheiser HD650 vs AKG Q701 QJ
  243. Split-supply portable headphone amp / DAC
  244. A47 / Crystal CMoy
  245. Electrostatic Headphones
  246. akg k140 earpads
  247. Which design is better for portable linear amplification?
  248. Midgård, compact, low distortion, high quality, Class A Lateral FET headamp
  249. Copper for Headphone Amp Chassis
  250. The DAO SE all-FET Class-A ZGF Headphone Amplifier

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