Abstract: Has all loudspeakers equal need for DRC?
My first DRCÂ attempt was with my laptops built in speakers (perhaps a 2$ installation however labelled “Bang & Olufsen” đ ) and the improvement was huge!
But how good was it in absolute terms? Not all that good, the bass was VERY limited and weak, as was the power to play loud.
My next try was my new Klipsch Palladiums.
As my normal listening room was occupied with my old speakers (modified Altec Valencia´s with Tangerine phase plugs and JBL-075s). I opted for our guest room, much too small and not with good acoustic properties. Something had to give? The decision was to set up the listening position near field, to minimize the influence of the less than optimal room. The speakers were set 130 cm apart and the listening position 100 cm in front of them, where the toe in axis of the speakers met.
The amp used was an old spare, a Sony DA50ES of about twenty years of age, however the Sony ES line was always well constructed, so no problems expected there.
The measurements before filters are listed below in white and with filters in green.
As You can see the average mesurements in 8 microphone points some 15 cm apart is about +- 5dB from 30 to 22k Hz and the ringing of the impulse, is not much different after the initial “down spike” wich ideally should be zero of course. So not so much correction made by DRC here.
When compared to my first tests – my Laptop built-in speakers, with its huge filter corrections – You would expect a much lesser improvement of the Palladiums by the DRC, than with the laptop.
The listening tests confirmed that. The impulse response of the laptop, points to severe phase problems apart from the ringing. That the DRC filters took good care of. Whereas the impulse response from the Palladiums, reveals a well-behaved system, with both phase and ringing. Actually so good that the difference hardly could be heard. The stereo imaging was the exception, with noticeable sharper placement of voices and instruments, with the DRC filters.
Conclusion: Better loudspeakers benefits less from DRC than worse ones.
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Excellent article! If You think about it, worse technology has more to gain on improvements than already refined.
Amazing! Why spend small fortunes on HiFi eqp? When the effect quickly gets very marginal. Are we looking for better sound or just status?
I will be following this blog closely to see how I can get big improvements for small money on my cheaper eqp in the kids rooms, the kitchen and the summer cottage using DRC, rather than marginal improvements for big money, without it.