Accuphase A-70 enough to drive Magnepan 20.7 or 30.7?
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  1. #1
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    Accuphase A-70 enough to drive Magnepan 20.7 or 30.7?

    hi,

    Wonder if anyone has experience with Magnepan driven by Accuphase A-70 class-A amp?

    More specifically, wondering if A-70 has enough power to drive large panels such as the 20.7 or 30.7. By the way, I saw in an online 30.7 User's Manual that it apparently has the same sensitivity rating as that of 20.7, which is rated 4 Ohms load and 86dB/500Hz /2.83v sensitivity.

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    Re: Accuphase A-70 enough to drive Magnepan 20.7 or 30.7?

    Quote Originally Posted by Charles Lin View Post
    hi,

    Wonder if anyone has experience with Magnepan driven by Accuphase A-70 class-A amp?

    More specifically, wondering if A-70 has enough power to drive large panels such as the 20.7 or 30.7. By the way, I saw in an online 30.7 User's Manual that it apparently has the same sensitivity rating as that of 20.7, which is rated 4 Ohms load and 86dB/500Hz /2.83v sensitivity.
    Hi Charles and welcome to AudioShark! While the inherent quality of a pure Class A amp like the Accuphase A-70 would be apparent at moderate volume levels with the large Magnepans, such speakers really thrive on high power and current and in my experience only really 'come to life' when driven with amps rated at a couple of hundred watts and above. Even when not being driven towards the amplifier's limits matching high powered amps with the large Maggies seems to energize and control the panels much more successfully than lower powered amps and as a result they sound more effortless and relaxed in their presentation. Hope this helps!

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  4. #3
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    Re: Accuphase A-70 enough to drive Magnepan 20.7 or 30.7?

    The A-70 is a beefy amp but, with Maggies, it would not have enough power for me. I've never tried that combo tho.
    Jock

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    Re: Accuphase A-70 enough to drive Magnepan 20.7 or 30.7?

    That's such a sweet amp..would probably sound amazing on 20.7s, but, I'd bet that on those occasions where ya want to play hard (loud) you'd be wanting more power.
    Magnepan 20.7 - CJ ART 300s - CJ GATV2 - Meitner MA-1 V2 -Dedicated JRMC + Synology NAS

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    Re: Accuphase A-70 enough to drive Magnepan 20.7 or 30.7?

    Quote Originally Posted by Charles Lin View Post
    hi,

    Wonder if anyone has experience with Magnepan driven by Accuphase A-70 class-A amp?

    More specifically, wondering if A-70 has enough power to drive large panels such as the 20.7 or 30.7. By the way, I saw in an online 30.7 User's Manual that it apparently has the same sensitivity rating as that of 20.7, which is rated 4 Ohms load and 86dB/500Hz /2.83v sensitivity.
    I own the 1.6's and they really appreciate the 500wpc of my Pass amp. You lose depth, musicality and dynamics with lower powered amps.
    My Gear- Mains System-Pass X250 amp, BAT VK-51se preamp, Luxman DA-06 DAC, Magnepan 1.6's, Thorens TD-145 TT, Dual Martin Logan Subs, Vintage Luxman T-110 Tuner, Other systems- Parasound A21 amp,Van Alstine Ultra Plus Hybrid tube DAC and Preamp, Magnepan MMG's, Monitor Audio S1's, PSB B6's, Def Tech Pro Monitor 1000's, Velodyne sub, Adcom GFR-700 AVR, Music Hall 25.2 modified CDP, Cables by Cardas Parsec, AQ Columbia DBS 72v, Wire World.

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  8. #6
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    Re: Accuphase A-70 enough to drive Magnepan 20.7 or 30.7?

    When I had my 20.7's I tried as many amps on them as I could but even the Sanders stereo/mono amps struggled at times for me .... ymmv.

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    Re: Accuphase A-70 enough to drive Magnepan 20.7 or 30.7?

    The A-70 is a high current amplifier and it won't have any problems driving the Magnepans; only things you need to consider are your listening distance from the speakers and your desired SPL at the listening position; based on these two factors calculate if the A-70 has enough power to give you the SPL you want.

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    Re: Accuphase A-70 enough to drive Magnepan 20.7 or 30.7?

    Quote Originally Posted by Anatta View Post
    The A-70 is a high current amplifier and it won't have any problems driving the Magnepans; only things you need to consider are your listening distance from the speakers and your desired SPL at the listening position; based on these two factors calculate if the A-70 has enough power to give you the SPL you want.
    60 watts and high current will give you music at lower volumes but at louder volumes, the sound will suffer from lack of peak power especially with huge panels like the 20.7's and 30.7's.
    My Gear- Mains System-Pass X250 amp, BAT VK-51se preamp, Luxman DA-06 DAC, Magnepan 1.6's, Thorens TD-145 TT, Dual Martin Logan Subs, Vintage Luxman T-110 Tuner, Other systems- Parasound A21 amp,Van Alstine Ultra Plus Hybrid tube DAC and Preamp, Magnepan MMG's, Monitor Audio S1's, PSB B6's, Def Tech Pro Monitor 1000's, Velodyne sub, Adcom GFR-700 AVR, Music Hall 25.2 modified CDP, Cables by Cardas Parsec, AQ Columbia DBS 72v, Wire World.

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    Re: Accuphase A-70 enough to drive Magnepan 20.7 or 30.7?

    Quote Originally Posted by Mechnutt View Post
    60 watts and high current will give you music at lower volumes but at louder volumes, the sound will suffer from lack of peak power especially with huge panels like the 20.7's and 30.7's.
    60W is the rated class A power, the actual power available is 130W@8Ohm and 230W@4Ohm; just like the Pass XA60.8 for example is not a 60W amplifier but a 120W one.

    http://www.accuphase.com/cat/a-70_e.pdf

    I don't know how loud the OP likes to listen but the A-70 will give him 100dB peaks at a 3m listening distance without problems with the 86dB sensitive Magnepans.

    http://myhometheater.homestead.com/splcalculator.html

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    Re: Accuphase A-70 enough to drive Magnepan 20.7 or 30.7?

    Quote Originally Posted by bzr View Post
    When I had my 20.7's I tried as many amps on them as I could but even the Sanders stereo/mono amps struggled at times for me .... ymmv.
    This sounds about right

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