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Manley with 40.1

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  • Manley with 40.1

    Good day. I am considering the Manley NEO Classic 250 and possibly 300b pre with my 40.1s. I was looking for any comments / concerns? Thank you.

  • #2
    There are plenty of amplifiers that measure far better for less. Also, they will consume less electricty (save the planet).

    Comment


    • #3
      The Manley NEO Classic 250 is a valve power amplifier. Just like other valve power amplifiers, it's going to equalise the frequency response of your M40.1s. From an old review in Stereophile (here), the peak amount of equalisation can be up to 0.5 dB in magnitude at different points in the audio frequency range.

      Next, the distortion levels produced by the Manley NEO Classic 250 are quite high when compared to a typical 100200 WRMS solid state amplifier. If the colourations associated with those high distortion levels are euphonic in nature, then the higher levels of distortion may prove to be not much of a problem.

      When the frequency response variations and distortions introduced by the Manley NEO Classic 250 are taken into account, it seems apparent that it will have a bit of a sonic signature all its own, which will change with how loud you play music. From the published measurements, it's unlikely to come across as a high-fidelity "straight wire with gain".

      I suggest that you try and audition this amplifier at home with your speakers, ideally for a week or so, prior to making any final purchasing decisions. That will help to ensure that you are happy to live with its particular nonlinearities when connected up to your M40.1s.

      Comment


      • #4
        Originally posted by Brett11 View Post
        Good day. I am considering the Manley NEO Classic 250 and possibly 300b pre with my 40.1s. I was looking for any comments / concerns? Thank you.
        If you really want a tube amp, you might want to consider the Audio Research Reference 150 SE :
        http://www.audioresearch.com/en-us/p...ference-150-se

        The authors of both of these reviews state that the Reference 150 SE is their new reference amplifier.
        http://www.absolutesounds.com/pdf/ma...12-15_4web.pdf
        https://www.stereophile.com/content/...ower-amplifier

        Pair it up with a preamp, such as the LS27 :
        http://www.audioresearch.com/en-us/p...mplifiers/ls27

        Otherwise, if you'd be amenable to transistor amps (and given your apparent budget), consider the McIntosh C52 and MC452 :
        http://www.mcintoshlabs.com/us/produ...&ProductId=C52
        http://www.mcintoshlabs.com/us/Produ...roductId=MC452

        Comment


        • #5
          With a large budget, I would opt for the Benchmark AHB2 in bridged mode. It is the best measuring power amplifier on the market, and by a pretty wide margin. Will those superb measurements make a sonic difference compared to a good pro audio amplifier costing perhaps ten times less? I doubt it.

          Comment


          • #6
            Originally posted by willem View Post
            With a large budget, I would opt for the Benchmark AHB2 in bridged mode. It is the best measuring power amplifier on the market, and by a pretty wide margin. Will those superb measurements make a sonic difference compared to a good pro audio amplifier costing perhaps ten times less? I doubt it.
            Does the Benchmark amp include any circuitry to prevent clipping, or does it simply flash indicator lights when clipping is already occurring?

            Comment


            • #7
              The Benchmark AHB2 has flashing lights to warn that clipping is occurring. If clipping is dangerously severe, a protection circuit will shut down the amplifier to protect amplifier and speakers. In bridged mode the output per channel is 480 watt rms into 6 Ohm.

              Comment


              • #8
                Originally posted by willem View Post
                The Benchmark AHB2 has flashing lights to warn that clipping is occurring. If clipping is dangerously severe, a protection circuit will shut down the amplifier to protect amplifier and speakers. In bridged mode the output per channel is 480 watt rms into 6 Ohm.
                So, the only way the Benchmark amp can prevent clipping is by shutting down?

                The McIntosh amp can automatically reduce the input signal level to actually prevent clipping without having to turn itself off. Also, it's power output is over 580W.

                http://audio-components.de/assets/Up...ifirecords.pdf

                Comment


                • #9
                  Guys - Switching gears. Has anyone tried Sugden mono locks with the 40.1s.

                  Comment


                  • #10
                    Originally posted by Brett11 View Post
                    Guys - Switching gears. Has anyone tried Sugden mono locks with the 40.1s.
                    Might we inquire as to what you are seeking to achieve by "switching gears?"
                    How have you been steered in the direction of the Sugden product line?

                    Nevertheless, if it's a class A amp that you want, now, you should also consider one the amps from Pass Labs: https://passlabs.com/

                    Observe that a Pass Labs amp is shown, along with the Monitor 40 speakers, on the cover of the Harbeth brochure: http://www.harbeth.co.uk/library/halebro/halebro.pdf

                    Comment


                    • #11
                      They are class A which is a total waste of electricity. You can get a lot more power for less money, and a far lower electricity bill and less environmental impact. Your speakers need lots of power, and the simplest way to get that is by buying a pro audio amplifier. It will save you lots of money, for the same sonic quality.

                      Comment


                      • #12
                        Originally posted by willem View Post
                        With a large budget, I would opt for the Benchmark AHB2 in bridged mode. It is the best measuring power amplifier on the market, and by a pretty wide margin. Will those superb measurements make a sonic difference compared to a good pro audio amplifier costing perhaps ten times less? I doubt it.
                        In my experience "those superb measurements" DO make a sonic difference. I replaced a Plinius 9200 with the Benchmark AHB2. The Plinius is very well-regarded and an excellent amplifier. Nevertheless, the lower noise and distortion of the Benchmark amp made an audible difference. I would describe it as a step forward in clarity and resolution. I didn't know whether to expect to hear a difference between amps, but in this case the difference was not that subtle. Replacing the Plinius with the Benchmark was a no-brainer.

                        Comment

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