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Fitzmaurice Titan 48 [message #28302 is a reply to message #28299] Sun, 21 October 2007 13:31 Go to previous messageGo to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 18688
Registered: January 2001
Illuminati (33rd Degree)
http://prosoundshootout.com/Photos/2007/Titan48.jpg
Fitzmaurice Titan 48 basshorn sub

First, we measured impedance and found Zmin to be 6.25Ω. So 25v is required for 100 watts, 35.4v for 200 watts, 50v for 400 watts and 70.7v for 800 watts.

http://prosoundshootout.com/Measurements/2007/Titan_Impedance.jpg
Titan 48 impedance

Next, we measured output at 28.3v. Since we measured 10 meters away, the values correspond to 2.83v/1M.

The blue line is SPL, and the violet line shows distortion. Since measurement was taken at 10 meters, add 20dB to find SPL at 1 meter. With 100 watts input, the 10 meter measurement works out the same as 1 watt input measured at a distance of 1 meter.

http://prosoundshootout.com/Measurements/2007/Titan28v.jpg
Titan 48 response at 10 meters with 28.3v input (2.83v/1M)

From this, we perform an inverse FFT to obtain impulse and step response:

http://prosoundshootout.com/Measurements/2007/Titan_Impulse.jpg
Titan 48 Impulse Response

http://prosoundshootout.com/Measurements/2007/Titan_Step.jpg
Titan 48 Step Response

Measurement at 100 watts:
http://prosoundshootout.com/Measurements/2007/Titan100w.jpg
Titan 48 response at 10 meters with 25v (100w) input (1W/1M)

Measurement at 200 watts:
http://prosoundshootout.com/Measurements/2007/Titan200w.jpg
Titan 48 response at 10 meters with 35.4v (200w) input

Measurement at 400 watts:
http://prosoundshootout.com/Measurements/2007/Titan400w.jpg
Titan 48 response at 10 meters with 50v (400w) input

Measurement at 800 watts:
http://prosoundshootout.com/Measurements/2007/Titan800w.jpg
Titan 48 response at 10 meters with 70.71v (800w) input
 
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