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The Harbeth User Group is the primary channel for public communication with Harbeth's HQ. If you have a 'scientific mind' and are curious about how the ear works, how it can lead us to make the right - and wrong - audio equipment decisions, and about the technical ins and outs of audio equipment, how it's designed and what choices the designer makes, then the factual Science of Audio sub-forum area of HUG is your place. The objective methods of comparing audio equipment under controlled conditions has been thoroughly examined here on HUG and elsewhere and should be accessible to non-experts and able to be tried-out at home without deep technical knowledge. From a design perspective, today's award winning Harbeths could not have been designed any other way.

Alternatively, if you just like chatting about audio and subjectivity rules for you, then the Subjective Soundings area is you. If you are quite set in your subjectivity, then HUG is likely to be a bit too fact based for you, as many of the contributors have maximised their pleasure in home music reproduction by allowing their head to rule their heart. If upon examination we think that Posts are better suited to one sub-forum than than the other, they will be redirected during Moderation, which is applied throughout the site.

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{Updated Oct. 2017}
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Bryston vs LFD, the problem of low power

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  • Bryston vs LFD, the problem of low power

    My story in a few words. Purchased a set of HL5 plus speakers and hooked them up to my NAD C 372 receiver. Nice nice sound.

    Got curious and purchased a Bryston 2.5B SST2 amp and a wow moment! Further curiosity led me to getting an LFD Mark V since I read so many positive reports on the synergy with Harbeth.

    What a disappointment it was for me. Didn't even sound as good as my NAD. The Bryston rated at 135w blew it out of the water. Sent it back very rapidly. The NAD at 150watts did not have the clarity transparency the Bryston has.

    IMHO the LFDs problem was its low power. Alan Shaw is correct. The more the better.
    Now I sorta wished I had gotten the 400 watter Bryston lol.

  • #2
    Big is always better

    Based on my own experience through the years, I assure You that generally speaking, the more the better: this jumped the first time at my ears while comparing two power amplifiers from the same maker and with identical circuitry (Perreaux PMF5150 - 500W/ch versus 2150 - 200W/ch).

    Even playing at low listening levels, the big brother sounded more refined and detailed, less grainy.

    Start considering that beefier amplifiers will normally operate with less stress of their power supply (which seriously influences the overall sound!!!!!) drivers and power devices.

    The above from the point of view of an humble electronic engineer, not an audinut.

    Try, if possible, the big Bryston and let me know!

    Cheers

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    • #3
      Adequate power to drive speakers

      Had a similar experience with C7ES3's and LFD MK V. While music was fantastic at lower listening volumes (<90db), the soundstage began collapsing above that level indicating (to me) LFD is better matched with higher sensitivity speakers. After returning to separates with higher output, music is fantastic again throughout all listening levels.

      The C7ES3's are remarkable.

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      • #4
        The benefits of more power

        I recently replaced my old but refurbished 2x45 watt QUAD 303 with a refurbished 2x140 watt Quad 606 mk2. Playing softly I do not think I could hear much difference, but playing more loudly I certainly could. But what was I hearing? The effect of actually playing louder than I would have done with the 303, or better sound quality at the same loudness? Without a volt meter there is no way of knowing. My hunch is that it is probably a bit of both.

        In the end, that does not bother me, because the room is big (60+ sq m), and I did need more power. Happily also, watts can be cheap. I bought my second hand Q606ii for 350 euro from a retired QUAD NL service engineer who had completely refurbished it. Ready for the next 25 years, as he put it. Admittedly it is a bit challenged cosmetically.

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        • #5
          My LFD

          Originally posted by macroaudio View Post
          Had a similar experience with C7ES3's and LFD MK V. While music was fantastic at lower listening volumes (<90db), the soundstage began collapsing above that level indicating (to me) LFD is better matched with higher sensitivity speakers. After returning to separates with higher output, music is fantastic again throughout all listening levels.

          The C7ES3's are remarkable.
          Here no problems at all with my LFD 0 LE III (min. 50W rms/ch) with C7es3 in my well damped 4x5m room

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