March 28, 2013

Fig 9 - Dayton RS180s Response

Dayton RS180s

Fig 9 is the in-room Frequency Response of the Dayton RS180s measured with Dayton's OmniMic v2.

The Black Trace is the Raw Response of the RS180s. Note the rising response from 500Hz to 1,500Hz (+3dB). This is due to the narrow front baffle of my box. If left uncorrected, the mids will be too bright, resulting in "listening fatigue".

The Blue Plot is the Baffle Step Compensation (1.5mH//4 ohms) with a Zobel (10uF+10 ohms). This network completely eliminates the rising reponse. It is now virtually flat from 500Hz to 1,500Hz.

The final step is the crossover. The Red Plot is with a 2nd order Network (0.95mH with 8uF). The cone breakup (at 9kHz) of the RS180s is attenuated -33dB. Reference to 82dB, the attenuation is -20dB.

An interesting outcome is eventhough the electrical crossover is 12dB/oct, the resulting acoustic slope is actually at 18dB. That's a bonus.


Fig 10 - Pyle PDS382 with Dayton HE07E

Pyle PDS382+Dayton HE07E

In Fig 10, the Blue Trace is the Raw response of the Pyle PDS382 coupled to a Dayton HE07E Elliptical Horn.

Surprisingly, the response is very smooth to 10kHz. As the frequency increases, there is some attenuation but fortunately, it's not too drastic.

The Red Trace is with an 18dB/oct crossover. No other network is required as the crossover is ajusted for flat response.

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