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AR3a/AS103a speakers and the Heathkit AR1500 receiver
A previous poster stated that the Heathkit AR1500 and AR3a are a poor
combination. This is true if you listen at any level other than quiet. A couple of years after introduction, the AR1500's output amplifiers were updated and the AR1500A was born. The AR1500A has specific circuits that limit clipping and other distortion when it is driving low imperance speakers at high levels. It is possible to modify the AR1500's output amplifiers to include this improvement; you'd have to go to a Heathkit users groups to obtain that information. Driving AR3a's hard with an unmodified AR1500 produces a lot of "clipped sine waves" that will blow the mid-range driver. If you don't want to burnout the mid-range, but want to turn the volume up, add a 1 ohm resistor in series with each mid-range. This will change the mid-range balance, but that's better than burning out the driver. The AR3a was sold in kit form as the Heathkit AS103a. Let me know if you have any questions. |