Amp for inefficient speakers

Discussion in 'DIY Discussion' started by Farquad, Jul 25, 2018.

  1. Farquad

    Farquad

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    I plan on making my own 8 ohm speakers using a dayton audio dc160-8 which has a sensitivity of about 86dB. Accounting for baffle diffraction losses i estimate the speakers will have a sensitivity of about 82dB... pretty inefficient. I don't have a large budget but I'm looking for an amp that will drive these to a reasonable volume in a relatively small room.

    I've been looking at the smsl ad-18 which has a power output of 40w@8ohm because i would like to be able to use bluetooth to connect although it's not a deal breaker if the amp doesn't have bluetooth as an option
     
    Farquad, Jul 25, 2018
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  2. Farquad

    Sergeauckland

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    I use the Behringer A500 amp in my system, 120 watts into 8 ohms each channel and about £160 brand new.

    Excellent amplifier, even without reference to price.

    S
     
    Sergeauckland, Jul 25, 2018
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  3. Farquad

    Farquad

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    The A500 i found on their website says its a power amp with 600w into 8ohm speakers in a bridged mono configuration... Is this the same one?

    https://www.musictribe.com/Categories/Behringer/Power-Amplifiers/Studio-Monitoring/A500/p/P0217

    I've taken a look at the yamaha r-s202 as well which looks really good but it kinda pushes the limits of my budget
     
    Last edited: Jul 25, 2018
    Farquad, Jul 25, 2018
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  4. Farquad

    Sergeauckland

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    That's the one. It's a stereo amplifier giving out around 120-130 watts per channel into 8 ohms, but can also be bridged to give around 450-500 watts into 8 ohms mono. These power levels are what I've measured on three real units in my system, and are somewhat more conservative than Behringer claim. They rate their power at 1% distortion, i.e. into clipping, I measure mine at the onset of clipping, so will give a lower number for output power.

    Either way, it's quite sufficient for driving any sensible loudspeaker.

    S.
     
    Sergeauckland, Jul 26, 2018
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  5. Farquad

    Farquad

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    Sounds good... I’m always a little cautious when it’s not specced for it on their website
     
    Farquad, Jul 26, 2018
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