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  1. Headphones and Hearing aids
  2. Reacheargeable CMoy Amp??
  3. Testing headphones
  4. Discrete op amp headphone amplifier module, based on Marantz
  5. Koss ESP9 Headphones Low Volume Fixed!
  6. Please help with DIY headphone amp.
  7. Huginn, High performance, Class A, Lateral FET headphone amplifier
  8. MAT12 / MAT14 based headphone amp
  9. DC servo for Sijosae Buffer
  10. connect two inverting op amps together
  11. Yet Another Cmoy - PCB layout with Eagle and making PCB
  12. How to prevent unwanted volume adjustments on volume knob of a portable amp
  13. Project Ember ?
  14. O2 and power questions...
  15. Beyerdynamic A1 clone gold, opamp rolling
  16. Is there a better way to implement buf634 other than place in a a loop?
  17. An early look at my new HPA design
  18. O2 XLR, St/Mono swtich, etc Mod. ?'s
  19. A question regarding bass boost and output buffers
  20. O2 headamp output booster PCB
  21. cMoybb op amp rolling with AD797BRZ
  22. Millett Hybrid Starving Student (12AU7)
  23. Good capacitors for cmoy
  24. mysterious headphones
  25. New 4 layer LME49610 Headphone Amplifier D1
  26. Simple Headphone's Amp for beginner
  27. upgrading x-can V1? anyone?
  28. Headphone Amps DIY for beginners
  29. some question about headphone amp (possibly the o2)
  30. Unknown Stax Headphones for SRD-7
  31. Moskido Hybrid headphone amplifier! Help needed
  32. Lowest capacitance hum-rejecting 4-wire headphone cable configuration
  33. Best amp possible for the hd-650
  34. Looking for a Headphone Amplifier
  35. Shure Earphones SE846
  36. Headphone equalization hardware and software
  37. VSSA FOR HEADPHONE
  38. pcb layout for grado ra1 ?
  39. grado ra1 clone
  40. Szekeres vs. PRR-SOL amplifier
  41. Optimal grounding
  42. 4 channel stereo mixer
  43. New PC setup.
  44. Class A Heaphone Amp
  45. DIY Headphone Tap + Passive Mixer
  46. Beats by Dr Dre headphones or alternative models/brands?
  47. In line sound limiter for headphones
  48. Adjustable Ear phone volume limiter
  49. MOSFET follower to my phone
  50. Crazy CMOY board
  51. starving student vs jonokuchi or hybrid vs tubes for hd600 and sr80i ?
  52. Tube/SS OTL single tube recommendations
  53. Pseudo Bravo headphone amplifier
  54. PUSH-PULL HEADPHONE AMP
  55. Single valve amp
  56. My desktop Objective2 amp
  57. O2 loud turn on transient fix help...
  58. Help wanted to find an old schematic
  59. Dual TPA6120A2 headphone design to eliminate crosstalk
  60. Need an AMP recommendation, and have a couple questions.
  61. Pot value in cmoy
  62. YAHA HELP
  63. OPA827 + Diamond Buffer
  64. newbie qustion
  65. Advice on USB Soundcard / USB DAC + Amplifier
  66. 6n2 + fu32 vacuum tube tube headphone amplifier
  67. Headphone amp recommendation required?
  68. Tube Headphone amplifier suggestions 2x(1:40) transformers
  69. Different grounding, different sound quality or what can be the problem?
  70. Radio Shack Digital to Analog Converter
  71. 2SC1815 alternative for Mini Zen
  72. Two-Way Headset Wiring
  73. whats worng with this circut
  74. Phono amp top slot board for O2 amplfier in B3 case
  75. Szekeres VE protection diodes?
  76. Headphone Amp Feels 'Electrified'
  77. Design Issue: Cascaded passive filer stages
  78. Headphone amp between source & amplifier - how to passthrough?
  79. Open Source Headphone Amplifier
  80. OPA2132/4 for headphones
  81. O2 LiPo Daughterboard
  82. Class AB with op-amp input, audible noise
  83. PCB check for a simple amp
  84. Home meade design AMP prob's
  85. Noise - how much is too much?
  86. Massively parallel LME49990 headamp
  87. Building the O2 - A novices build experience
  88. A Through-hole "Wire" Amp
  89. Adding a headphone output to CD PLAYER?
  90. Rod Elliot 113 - Headphone amp TOO MUCH GAIN
  91. Dual O2-Inspired, SMD Headphone Amp
  92. Low impedance phones, Please suggest amp design?
  93. Huge change in audio quality simply by changing the pads on headphones?
  94. what next, help please
  95. DIY isodynamic headphones?
  96. DIY replace jack plug: strange colors
  97. Canjam 2013 ?
  98. Can you disable DAC on O2 ODAC?
  99. Can i connect my sony pulse wireless heaset to a TV ?
  100. Audio controlled voltage mod.
  101. AKG K518
  102. Composite amplifier in class A
  103. A great Fostex T50RP amp?
  104. helmet speakers
  105. Ambisonics, and listening to binaural via speakers
  106. Cheap but linear headamp
  107. Thin Durable Flexible Wire to Fix Headphones
  108. If headphones are out-of-phase, can you hear it?
  109. Oatley K272 DC power options.
  110. A curious Inquiry involving internal headphone amp/powering multiple earbuds?
  111. recommend me a valve headphone amp - Beyer T1 & AKG Q701 etc
  112. HP amp out impedance vs. HP impedance
  113. O2 help with bass boost and 1/4 jack mods
  114. Anyone ever used LM4780 for headphones?
  115. Stax Type 1 headphone, anyone know what these are?
  116. DIY balanced headphone amp?
  117. Simple headphone amp from spare parts
  118. SENNHEISER HD800 Source Impedance
  119. TDA1308 - changing gain resistors
  120. Headphone Amp Selection?
  121. Classic v1 headphone amplifier
  122. RFI problems on diy headphone amp.
  123. power flickering on tube cmoy amp
  124. question about a circuit
  125. hello all is a dac worth buying
  126. Passive bell shaped EQ for headphones
  127. GLASS-SAND CLASS A TUBE MOSFET HYBRID HEADPHONE AMP
  128. HD650 can I fix this?
  129. Headphones Amplifier HIFI
  130. An "O3" - 35% smaller SMD RS O2 headphone amp version
  131. need help with headphones
  132. Moe'stevens O2
  133. Need help - using J A Burgess 45 SE amp for headphones
  134. Akai EIE Pro or Lexicon I-O|22 for AKGQ 701 [Specs inside]
  135. Power switch driver board(Momentary switch) + output relay board(delayed ON/fast OFF)
  136. OpAmps to drive HD650 from AK4399 Vout DAC
  137. Where to place current limit output resistor?
  138. Headphone amp noise. Help!
  139. USB DAC & headphone Amp with 3D Printed Enclosure
  140. DIY amp/DAC with better measurements than O2/ODAC?
  141. Battery powered 4W amp
  142. stuffing cotton balls in headphones?
  143. Measuring headphone FR?
  144. LM1875 based amp by Sijose
  145. A version of an O2 Desktop Amp (ODA)
  146. ESP P113 voltage gain of 1, will it work?
  147. The No Headphone Amp!
  148. Help Needed - Push Pull Transformer replacement
  149. Improving Bass Response On A Popular Hybrid Design
  150. Koss Esp-9 to ESP-9b Conversion... Help needed with grounding scheme
  151. High power headphone amp
  152. New Modular Headphone Amplifier
  153. full range planar headphones using neodynium magnets
  154. JLH Chiarra or Hifisonix Class A buffer?
  155. Sennhesier HD424
  156. 2-channel regular ground, dual mono or "balanced"/bridged?
  157. Jack Plug Wiring Help
  158. New Portable Amplifier Project started
  159. Pimeta V2 or O2?
  160. JLH Class A headphone amp from ETI not WW
  161. Left/Right Channel balancer
  162. Choosing a DC storage/rail cap for cmoy like amp
  163. Feedback resistor size - opamps
  164. Can I add a Potentiometer to these Headphones?
  165. Headphone distribution schematics
  166. Stax upgrade recomendations please.
  167. tube amp designs for low impedance headphones?
  168. headphone buffer/output for usb/dac
  169. Personal EQ & AMP for Hearing loss
  170. Grado RS1 headphones
  171. MOSFET Headphone Amplifier
  172. Lehmann clones
  173. which amplifier kit on ebay?
  174. Koss HV/1LC - specifications
  175. Headphone maximum power
  176. Output device for SE Hybrid Headphone Amp
  177. Output impedance as compensation?
  178. New Headphone Amp kit supplier in OZ
  179. suggestion for a 200$ headamp
  180. Replace Blackbox m10 3-prong jack
  181. Sony MDR-V6 changed?
  182. New portable amplifier
  183. New portable amplifier
  184. Stax SRM-212 repair?
  185. Audiophile Gear vs. ODAC/O2 (DAC’s and Amp’s)
  186. Sennheiser HD650 vs AKG Q701 QJ
  187. Split-supply portable headphone amp / DAC
  188. A47 / Crystal CMoy
  189. Electrostatic Headphones
  190. akg k140 earpads
  191. Which design is better for portable linear amplification?
  192. Midgård, compact, low distortion, high quality, Class A Lateral FET headamp
  193. Copper for Headphone Amp Chassis
  194. The DAO SE all-FET Class-A ZGF Headphone Amplifier
  195. What is this?!
  196. Background noise - tube amp
  197. Am the only one who's not deaf....?
  198. Grado GS1000 died
  199. lme49600 buffering the output of a generic soundcard
  200. LMH6643 amplifier
  201. Balanced input headphone amp
  202. Rigs test
  203. Kevin Gilmore KGSSHV boards
  204. Universal Headphone Amp - fits different headphones
  205. Headphone distribution block (passive)
  206. Calculating audio transformer losses?
  207. O2 headphone amp with 4x 8.4V cells
  208. how to mix sound from notebook and external sound card and get headphones output
  209. Koss HV/1LC foam Ear Pads
  210. Any DIY/Upgrade Components Ideas for Bravo Audio V2 12AU7 HeadAmp?
  211. Class A mosfet headphone amplifier. How does it look?
  212. Headphone Connections
  213. Headphones
  214. my new MING DA MC300-EAR headphone. Would like your suggestions.
  215. Best Sounding AMP for IMOD ( Modded ipod ) LOD
  216. Any point in adding a audio transformer for more power?
  217. Convert Low V Aikido line stage to headphone use?
  218. Balder, OPA2134+BUF634 Headphone Amplifier
  219. A good Headphone Amp for AKG K240DF anybody? It's 88dB and 600ohm, Thank you.
  220. Converting an Amp to Balanced XLR
  221. Calculating output impedance of Morgan-Jones headphone amp?
  222. norrisr
  223. modulation-like distortion of music at low volumes
  224. My E5 Class A hifi headphone amp
  225. Midgard, a low distortion Lateral FET output Headphone Amplifier
  226. can someone look this over?
  227. STAX Earspeaker part
  228. noise cancelation
  229. Best headamp for Hifiman planars?
  230. Headphone Passthrough Techniques
  231. I need Amplifier.
  232. Tone Stack with 2 knobs and switches
  233. Another 6922/6AS7 OTL Project
  234. Can anyone help me, repairing my DACPort
  235. Upgrading ICs in headphone amps
  236. Creating headphone jack from speaker out
  237. resistors in cmoy
  238. Electret Mic -> Headphones
  239. akg 240M ear pads
  240. "Balanced" vs single ended headphone drive
  241. Source for these Aluminum headphone cases/chassis?
  242. How do I Improve bass handling in a headphone amp?
  243. Little help please
  244. Objective2 as preamp (Help Needed)
  245. Best Earbud (not earplug) headphones to buy?
  246. help with caps and resisters
  247. A small, low-voltage, battery operated amplifier
  248. O2 Headphone amp gerber files problem
  249. Audez'e LCD-2 - help needed for a DIY cable build
  250. My Objective 2 having weird issues

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