class ab

  1. B

    Mackie SRM450v1 - Loud pop at turn on, followed by loud 120Hz Hum and no sound.

    The speaker worked before working on it. Initial problem was that the volume was cutting in and out when fiddling with the volume knob. okay, I started by also changing the filter caps as the old ones were bulging outwards and were ready to leak anytime soon. Nothing too complicated, for now...
  2. R

    Buckeye 1ET6525SA vs Soncoz SGP1

    Hi Friends! I have been reading this blog since the last 5 years. But this is my first thread. Im looking for a power amplifier for my Penaudio Sara S speakers (87 dB/1m - 4ohms ). I have a budget of maximum 1,500usd. So i have been able to narrow the option to two awesome options: 1)...
  3. Mike_Trueman

    Topping (class D and B) vs Arcam and Rotel (class A/B)

    I am wanting to upgrade my system but i am still not sure to go class A/B or class D. (or even class B it seems) The amp is going to be paired with PMC Prodigy 1 speakers and the SVS SB-1000 pro subwoofer. So i want to see your opinions and reasons. :cool: Which AMP/DAC combo would you prefer...
  4. DaniPucc

    Dayton Audio A400 new AB amplifier

    Hi guys, does anyone know this amp? https://www.daytonaudio.com/product/1967/a400-2x200-watts-stereo-power-amplifier
  5. Naja

    Question about class D

    So, I got a new class D amp (TPA3255) to replace my old AB amp, all in all I think it sounds much better than the AB amp, but I have one big gripe with it. I noticed this without listening for it, compared to the AB amp it makes music faster, like there is no space between one note and the...
  6. pma

    Class D A07 x class D UcD180 and class AB amp - there are measurable differences on acoustical side

    Following the assumptions on possible influence of ultrasonic noise and carrier frequency residuals to tweeter output I have prepared an experiment where the tweeter is driven by 2.82V sine tone of 6kHz from 2 different amplifiers. One of the is AIYIMA A07, see my review...
  7. St1n

    Vintage vs Modern; Class A vs A/B

    My journey so far... I've been on the hi-fi merry-go-round for a little while now, and having an engineering background, decided to go the vintage route as an attempt to save on costs. I've found that after re-capping these units from the 70's, these units generally perform quite well...
  8. anphex

    Weird phenomenon with Emotiva XPA Gen3

    Hi folks, greetings from Berlin! due to a pretty big upgrade in my hifi system I came to occupy myself with looking for a fitting power amp. The speakers are Nubert NuVero 170 which are said to be very power hungry with 85db/1W and mercilessly monitor like (they are). I was powering them with a...
  9. pma

    Measurements of vintage Kenwood KA-5010 amplifier clone - Now with SMPS!

    When I first saw schematics of vintage Kenwood KA-5010 amplifier, 2 years ago, I was immediately attracted and decided to build a circuit copy, better say a copy of the circuit topology with some newer solid state parts used. There were 2 points leading me to this decision - frequency...
  10. amirm

    Electronic Basics: Understanding Class B and Class AB Amplifiers

    In a recent thread on Benchmark AHP2 amplifier (http://www.audiosciencereview.com/forum/index.php?threads/benchmark-first-watt-abx-facepalm.766/#post-23784) I noted that their marketing page for that unit showed a class B amplifier but said that it was class AB. Even though this is a much...
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