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  1. Butterworth series to Linkwitz-Riley Calculation
  2. CS4398 - Output Stage
  3. Any Discrete CFA Opamp?
  4. Pre-amplifier circuit not working despite attempts to fix it
  5. Where are the DIY cables?
  6. Opamp survey
  7. Article - 2 New and Improved AVC Topologies + Full Pre-Amplifier
  8. Passive vs Direct
  9. Active Crossover... help me wrap my head around this.
  10. Help with VU meter amplification made of an Ampere Meter
  11. Multi-purpose dual op-amp PCB design
  12. Relay volume control and input kit?
  13. Need advise about active crossover routing
  14. Pot Noise
  15. balanced vs. unbalanced
  16. Defective PGA2311 preamp display screen
  17. which preamp kit ?
  18. Volume control - Pass Camp Amp
  19. Preamp between Boozhound phono and ACA amps
  20. A hum problem
  21. Advice on preamp+tone kit or IC for use with ClassD board?
  22. Advice PreAmp <$400
  23. OPA627 Preamp Dynamic Crosstalk Issue
  24. Audio Limiter with JFET Class-A
  25. Preamp problem
  26. Cheap IC-based remote volume control kit
  27. Notch filter in balanced configuration between Amp and Pre Amp
  28. Maya R2R connection advice
  29. Following a Technics SU-9070
  30. Willow II
  31. The THD+N of passive preamps
  32. Investment volume potentiometer
  33. Active filter for fullrange: where do you need op amp buffers?
  34. Advice on Attenuators
  35. effects loop insert for mixer
  36. Battery powered active x-o. To decouple or not to decouple?
  37. Pre-amp amplifier driving capacity
  38. DIY DJ Mixer
  39. 70s Pioneer SR202 spring reverb - power issues
  40. Verify my high pass filter wiring for me?
  41. DIYINHK AD1862 I/U stage suggestions.
  42. Simple remote volume control (controlled through arduino)
  43. Does this passive preamp exist?
  44. Peak to peak
  45. Recommandations for electrolytic capacitors / preamp recap
  46. Will a capacitor high pass filter interfere with BSC circuit?
  47. Anyone know anything about Analog Devices B100?
  48. Capacitors wired in Series vs. Parallel - Please verify my understanding
  49. Signal to chassis ground query
  50. Mark Kelly DC motor controller advice required please
  51. Transformers to buffer PLLXO??
  52. triangle buffer for unbalancing?
  53. where are decoupling capacitors required
  54. Preamplifier recap: voltage values
  55. Simple mixer project (one mic, one line inputs)
  56. Analog combiner vs digital summing?
  57. Balanced or Unbalanced
  58. AK4113 automatic inputs or?
  59. Mark Levinson 380s PreAmp Schematic needed
  60. Moscode Super IT - schematics? power supply?
  61. AES article on the ultimate active crossover
  62. Attachment identification
  63. MiniDSP 4x10 HD Measurements
  64. Volume pot roughness
  65. Distortion in a Tone Control
  66. Remote Control for the BPBP
  67. Looking for standalone VU meter
  68. Logitech Ultimate One Compatible Potentiometer
  69. Ways to sum stereo to mono before the power amplifier?
  70. What's the benefit of a balanced floating line driver anyhow?
  71. Capacitor and Resistor choice for OpAmp line tap
  72. Rotel rsp 976 memory capacitor problem
  73. Triaxial interconnects
  74. 2.1 Channel Preamplifier?
  75. Opamp on battery
  76. single supply buffers
  77. 10kohm series/shunt 23 position resistor attenuator.
  78. Low cost Arduino based total amp control
  79. need advise to optimise my OPamp preamplifier
  80. Filter design
  81. Convert stereo Speaker Level to mono Speaker Level?
  82. Hovland HP100 line pre amp
  83. Neurochrome Differential preamp build
  84. Ribbon cables and audio
  85. Volume pot value
  86. Stereo Coffie 3 Input LDR preamp setting up
  87. parallel opamp?
  88. Advice on troubleshooting TK Audio The Strip - Distorts after ~100sec
  89. Question about LM4562 preamp (SC 08-07)
  90. Chinese sub filter, any good?
  91. EZ1073 build
  92. Arduino CPU for the PGA2311 preamp
  93. how to build a butterworth filter
  94. mercury switched input selector
  95. Cheap Chinese active X-O
  96. Restek Fantasy
  97. Anyone knew this pre
  98. Unusual Balanced audio distribution Question
  99. Potentiometer value
  100. Transforms using Sallen and Key topology
  101. How useful is this DSO 138 scope kit?
  102. What to do with unused opamp pins?
  103. Creating Virtual +/- PSU for Subsonic Filter
  104. Retrofitting Old Preamp with Motorized Volume Control
  105. baxandall differences
  106. LM3914 input selector idea
  107. Need help with "my" Simple LF and HF Shelving Preamp
  108. Problem with low-level hum.
  109. Simple Passive 3 Band EQ with Sweepable Midrange
  110. Personus acp 88
  111. 2 Channel Mixer Circuit
  112. Passive Line Splitter question
  113. Attenuator pad question
  114. Advice on what to use for a proper line level preamp for use with active Xover and EQ
  115. 7193->6BX7 Push-Pull Aikido Preamp
  116. Looking for a schematic for a Presonus ACP88 Compresser limiter
  117. XLR to DIN adapters grounding
  118. Tone Controls (probably unnecessary long)
  119. +4Bu to -10dBv and vice-versa
  120. Dead OCM 55...
  121. Lite Audio MV-01 / MV-06 remote controlled volume/input selector
  122. Passive tone control
  123. Concrete listening review of "his master's noise" Phono Pre?
  124. Riaa expermentation....
  125. Unbalanced RCA > Balanced XLR Pre-Amp
  126. I was Inspired By this Forum
  127. VCA That2180
  128. Belles DMC Preamp Restoration
  129. Standalone Music Streamer / Receiver
  130. NE5534N limitations for balanced input
  131. Programable Active Analogue Crossover
  132. Sony EV-310 Videocorder schematics
  133. Lpad eq
  134. Cambridge audio Azur 840E Schematic, Service Manual
  135. Trying to make a Balanced line input on LM3886 chipamp using ina134. HELPPP!!!
  136. OPA2604 - oscillation problem
  137. breadboard ESD P06 Preamp not amplifying
  138. AD 797 Preamp
  139. Preamp/input frequency response
  140. Mixer inputs
  141. My Borbely All-Fet Preamp with Subbu
  142. inductor output power amp
  143. 2 Questions, Connecting Line Level only sub to Stereo, PC Audio Analyzer Software
  144. NE5532 Harmful oscillation
  145. Instrumentation amplifier
  146. low noise 748 op amp replacement
  147. high pass filter and transformer
  148. Design for balanced tone control
  149. 2 + 1, variable state bi-amping VS steep low pass subwoofer
  150. Is 5m rca lead death
  151. Low pass filter with very less settling time
  152. 2.1 preamp (Struggling)
  153. Help choosing a preamp for a Honey Badger
  154. My Aikido All-in-One octal preamp
  155. Best preamp kit/components?
  156. Another JFET phono preamplifier
  157. Can I make a passive preamp with these?
  158. Book : Small Signal Audio Design - Douglas Self
  159. Type of mic used for IoT voice recognition
  160. Nakamichi 500 as a rec. preamp
  161. Preamp or buffer advice needed
  162. SS analog warmth / tube sound circuit wanted
  163. Line Level Comp and Preamp
  164. Preamp suggestions
  165. Attenuation T-pad after minidsp help
  166. Baby first Opamp Buffer / Preamp
  167. an active LED-LDR volume control featuring in-situ LDR monitoring
  168. Headphone Cue Insert Box
  169. Balanced connection using 3.5mm
  170. Pre amp advice
  171. O2 grounding help
  172. Bridged T filter formulas. Q and bandwidth estimates and other basic formulas
  173. Wireless line level connection
  174. Buffer after 1k pot?
  175. MM/MC Switching
  176. What's wrong w/ my breadboard high pass??
  177. Digitaly controlled input selector advice
  178. Hybrid preamp / Cordell's LSK489 app note
  179. 4-channel gain stage with power supply
  180. Need help adding wireless to my FrankenStereo
  181. Replacement for JRC 4580D
  182. SMT ceramic cap found in critical audio path in high end AV amplifier, please advise?
  183. Suggestions sought for tube preamp
  184. L Pad problems with a B1
  185. Components change to swap opamp?
  186. NE5532,OPA2134 Class A biased.Worth to try?Your experience?
  187. Question on modifying a passive pre
  188. Intelix matrix mixer schematics anywhere?
  189. Naim Nait 2 - Phone Stage is out of Balance
  190. Idiot-proofing circuits
  191. Hafler DH-110 Switches
  192. Warm up the sound of my preamp
  193. Line stage preamp tube vs solid state???
  194. 3way LR24 crossover phase issue
  195. Welborne Remote Stepped Attenuator
  196. Cirrus CS3318 with balanced signals
  197. Unbalanced in-line attenuator
  198. Can you stack power supplies? And,
  199. Preamplifier (tda7313) to amplifier impedance matching and signal attenuation.
  200. PGA4311 8 channel preamp
  201. Overhaul of a Cabasse Grand Large PST 16 from the '70
  202. Circuit Compairison
  203. Faint static on one side of system with pot around half
  204. Yamaha 550u EQ opamp questions?
  205. Preamp Design - Novel or Silly?
  206. ARC LS2B took a hit tonight
  207. 9v power supply issue with tapehead preamp circuit
  208. Sound card Pinouts
  209. Help with Shunt attenuator selection
  210. How to use digital controlled volume ICs? (PGA4311)
  211. Questions about i2c volume control SQ for opamp 3/4 way 8channel xover + linedriver
  212. Opamp Output Stage Schematic - Is it class-A ?
  213. preamplifier Relay issue.
  214. Lookking for a BJT or JFET single supply inverting buffer
  215. Phase change/ stage smearing.
  216. Audio Design Model 1 Volume Pot Replacement
  217. What's a good Baxandall tone control implementation?
  218. JBL L300 - Crossover repair
  219. Sleep In Peace>>>>>>>>>
  220. help troubleshoot weak channel on preamp please
  221. Help understanding preamp designing
  222. How does an 11200 Reite preamp sound?
  223. Best shielded wire for preamp?
  224. LDR Attenuator Impressions
  225. KRK VTX4 - Replacing filter caps, still noisy
  226. SONY TA-E1 preamplifier clone
  227. Voltage Divider for Op Amp
  228. Any opinions or improvements suggestions about this balanced inout line amp circuit ?
  229. Phono preamp buzz
  230. Inverse Notch Filter Function to compensate narrowband Minimum at Speakers
  231. Long cable run question
  232. Picked up Reite line and power supply
  233. Output /input signal strength pad for live sound
  234. composite opamp benefit (audible)
  235. Blending Two Independent Preamps
  236. Mic preamp based on Cohen Double Balanced Microphone Amplifier
  237. Curcio PAS 3 vibration
  238. Stepped Attenuator Clarification
  239. Driving VU Meters
  240. KMTech Active Crossover + Burson SS V5 Discrete
  241. behringer/dbx 2 way crossovers battery power supply
  242. Multichannel remote volume control
  243. Noise even if the signal doesn't pass through a component?
  244. Substituting Toshiba Op-Amp Into Circuit
  245. Khozmo Passive Pre Remote Issues
  246. A quick question reguarding audio Amplifiers
  247. Tape Head Pre Amp
  248. Designing simple, educational DAC
  249. Attaching preamp in/out signal grounds at chassis vs. on PCB
  250. Building A Monitor Controller

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