power amplifer

  1. pma

    DIY 250W/4ohm amplifier based on "blameless" topology, and measurements

    DIY 250W/4ohm power amplifier based on “blameless” topology Hello all, the thread posted here by @sabristol https://www.audiosciencereview.com/forum/index.php?threads/luxman-l-85v-integrated-amplifier.20657/ inspired me to build a new DIY amplifier functional sample. The circuit posted in the...
  2. pma

    AIYIMA A07 TPA3255 Amplifier Measurements and Review - LM4562 (and OPA2134) option

    AIYIMA A07 TPA3255 Amplifier Measurements LM4562 option I received my A07 yesterday, on January 6, 2021, shipped from Italy. Purchased at Amazon.de and as stated on their website, it arrived without a power supply. I am testing the A07 with 2 different power supplies. One of them is a linear...
  3. VintageFlanker

    BoXem Audio Arthur 2408/N2 Review (Stereo Power Amplifier)

    Disclaimer: This review sample was kindly loaned to me by @boXem | audio. I have no financial relationship with the brand whatsoever, nor had got paid to say anything good or bad about this amplifier. Also, my English still sucks even after being there for two years, so please be easy on that.;)...
  4. P

    DAC/PreAmp + PowerAmp or integrated amp for Amphion Helium 520

    Hi! I bought few months ago Amphion Helium 520 speakers: Amphion Helium 520 Specs: Sensitivity: 90dB Power recommendation: 10-150w (4Ohm) I currently have my old Denon AVR-1611 integrated amp and now I want to get stereo amplifier for Amphions. I dont need 5.1 or 7.1 surround anymore. Budget...
  5. R

    Matching headphone impedance against OEM specs

    So I use http:// www. digizoid. com/ power .php to calculate the mW needed to power headphones. My HiFiMan HE400i impedance is 35ohms and my bayerdynamics custom studios are 80ohms. Most manufacturer specs state for 16/32/300 ohms like for example: - My fiio k3 specs on unbalanced output...
  6. R

    McIntosh MC252 Power Amplifier

    McIntosh MC252 Power Amplifier $3200 I'm offering MC252 in very good working condition. Voltage: 120V Cosmetic Description: 9/10 Excellent condition with no notable blemishes. What is Included: Amplifier, Remote, Manual, Factory packaging Functional Notes: Operational condition of this item is...
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