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  1. New AMP4
  2. AMP4 queries
  3. Test AMP4?
  4. A question... (8 ohm)
  5. Any news?
  6. AMP4 first pictures
  7. AMP4 ready?
  8. AMP4 shipping aug 24th
  9. Stuffed Boards Available?
  10. Why TK2050 and not TK2051?
  11. Height of Capacitors
  12. C61 and C62
  13. Amp4 instead of amp-3
  14. AMP4 for 4 Ohms Speakers
  15. another coil?
  16. SMD newby about to begin an AMP4
  17. Ground problem
  18. toroid selection for 4 and 8 ohm
  19. Choosing the value of the Signal Input Caps
  20. 35W into 8ohms w. batteries - ideas?
  21. Altering AMP4 Kit -PIO Caps, Coils, Atten., Batts.
  22. Finished (almost)
  23. My second amp4 , rail voltage on J1 pin 1&2.
  24. On/Off switch may permanently close mute
  25. 9v test failed, got 24v
  26. R52 and R54/additional components confusion
  27. assembled AMP 4 pics
  28. AMP 4 Schematic and BOM download
  29. What size volume control (pot/attenuator)?
  30. Q2???
  31. 5v Section HELP!
  32. Testing with D1 installed
  33. Power connector
  34. R59 Value
  35. toasty regulators with low voltage
  36. Power supply for AMP4
  37. Input overload LED permanently ON
  38. 18VAC works. 30VAC doesn't...
  39. How do you tell P-chan and N-chan MOSFETs apart?
  40. Second AMP4, I am gutted now
  41. What material to wind cores? Silver or Copper?
  42. Some problems solved
  43. 4 Ohm usage?
  44. The dreaded "wrong" 5V...
  45. "voltage supervisor" 5 Vdc, question
  46. Bill of Materials?
  47. Max current rating of the output inductors
  48. Mute LED Issue/Possible fix
  49. R100 value
  50. Lm317 needs an heatsink
  51. 'Tank Caps' on the Amp4?
  52. My third AMP4 is working but...
  53. 'on-board power supply' when using SLA Batts...
  54. help 2,5dc offset !
  55. tweaking the power supply
  56. Sound quality
  57. Fuse value
  58. PSU Project
  59. Schematics of Amp4
  60. Best way to power amp4
  61. Lost C26 use 50V?
  62. +5V, +9V OK, but VREF~0V!Need Help~
  63. Another mute question
  64. EMI suppression
  65. input impedance??
  66. SMPS as the power supply "AND" SLA charger
  67. SLA vs Li-ion vs NiMH?
  68. Regulated or non-regulated SMPS
  69. Amp4 gone to heaven
  70. Just don't be too hasty...
  71. How Hot is too Hot?
  72. Parallel outputs of amp4 possible?
  73. Muting, U5, etc
  74. Progress at last!
  75. high ac current
  76. PCB Scan/Picture required for troubleshooting
  77. Dead amp4
  78. WANTED: Volenteer for A vs. B testing of my coils.
  79. Zobel network in the output section
  80. Tripath TA2050 alternatives
  81. A project with Amp4... Some questions, helps pls.
  82. I want to use a 36VDC, 150W SMPS... is it ok?
  83. Help! closing j10 causes tk2050 overheating!
  84. AMP4 Output Relay Problems
  85. I just bought an amp4 kit...
  86. cramping hands from winding toroids
  87. What VA transformer
  88. power supply consensus?
  89. Q10 hot, and 300ma?
  90. How hot do your 2050's get?
  91. Giving up on amp 4?
  92. how many Power
  93. Oh Amp4, why do you taunt me! (U5 fix for rev 1.1)
  94. u5
  95. Strange amp4 bass response
  96. half an Amp4 working!
  97. 3xAmp4 = T6, the 6 channels Tripath
  98. debugging amp4
  99. AMP4 overload led always on
  100. Status led for AMP4
  101. help me
  102. Will this transformer work? (I am a newbie)
  103. 5v is more like 6,2v...
  104. Bridge AMP4?
  105. Amp4: doesn't like grounded ins or outs
  106. Question about PSU/SMPS for AMP4
  107. Component values R52, 54 and 59
  108. Amp4 Killed Speaker
  109. Help mounting PCB/heatsinking
  110. Problems with Amp4
  111. More troubleshooting
  112. AMP4 Kit for sale / swap
  113. AMP4 PIN OUT
  114. Transformer connection
  115. AMP4 and 4 ohm speakers
  116. Anybody Willing to Build an Amp 4 Board for me?
  117. power up problem
  118. SOT 23 identification.
  119. A very nice amp afterall!!
  120. Forgotten Tunes - My Amp 4 Mod Complete - TBA
  121. Power supply
  122. Active open baffle speakers
  123. USB audio input
  124. Amp4 improvement over Amp9B?
  125. DC protection
  126. Poor Service \ Identifying Components?
  127. Bad sound on one channel
  128. Startup/Unmute "pop" remover
  129. A TC2000, a TC2000, my kingdom for a TC2000.
  130. checking TP2050
  131. Relay not closing.
  132. Sure-electronics
  133. AMP4 for JBL Control1 battery powered
  134. component confusion
  135. Amp4 Sketchup model
  136. Omitting the relay?
  137. AMP4 picture thread
  138. Paralleled Amp4? Same as Amp11?
  139. Recommended tools for SM?
  140. AMP4 Rev 1.1
  141. I connected a 24v dc power supply the wrong way!
  142. Amp4 diagnosis help
  143. Input capacitors
  144. Coupling caps
  145. AMP4 Setup help for 4ohm
  146. Ipod inupt versus line level
  147. Amp41 w/ STA517 at 4 Ohms?
  148. Amp4 battery customization ideas
  149. A question regarding amp4
  150. Amp4 turn on pop and led query
  151. Considering an AMP4
  152. AMP4 DAC Sub Mini Tube Hybrid Awesomeness
  153. BOM Questions re: C59, R55, R58
  154. measuring DC offset
  155. AMP4-HV, it's alive!!
  156. Rev 1.1 BOM/Schematic
  157. Reboxing an AMP4 #FAIL
  158. Amp4 finished
  159. amp-4-ps-hv
  160. STA517B at same power levels as normal TP2050?
  161. stuff like Other 5V section
  162. Bom
  163. Amp4-hv-ps
  164. URGENT: Amp needed
  165. Torodial transformer
  166. Amp4 > r13 ?
  167. AMP-4: cap C30? not present in the bom...
  168. AMP4 power supply
  169. Volume control
  170. Amp4 build details
  171. some amp4 questions
  172. Help on my amp 4
  173. The best ready steady go board for nuances and delicacy
  174. laptop power supplies
  175. Saying hello again!
  176. could I add this ESP circuit (project 57 - "clipping indicator")
  177. with the soldering wick I pulled a pad of the power chip
  178. started: hot rectifier when I try first 5V test
  179. AMP4 for 16 ohm speakers
  180. voltage converter for 12v to 32 v for amp 4
  181. Amp4 -HV build
  182. Amp4 Slim
  183. Amp4 output filter tweaked for 4 Ohm
  184. Just ordered a 200W 24V Mean Well HRPG-series
  185. Amp4: The green LED?
  186. Amp4 debugging ... no output chip, relay is shorting?
  187. Amp4: 4-ohm max voltage for STA517B: 29V+, STA516: 33V+
  188. 10V preregulator instead of 9V, OK?
  189. Capacitor Mystery
  190. Amp4 fried, need some tips
  191. 9V test DC power
  192. AMP4 into 4 ohms - supply voltage
  193. AMP 4 delayed start up on one channel
  194. Any idea if/when Amp4 will be back in stock?
  195. connecting active woofer to amp4