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Re: Hornsub shootout RESULTS - Tuba 24 [message #28081 is a reply to message #28078]

Sat, 15 October 2005 13:20

Wayne Parham
Messages: 18786
Registered: January 2001

Illuminati (33rd Degree)

http://prosoundshootout.com/Photos/Tuba24.jpg

Tuba 24 basshorn sub

The Tuba 24 was the first to be tested. It weighs in at about 65 lbs and measures 24" x 24" x 24". It uses a single Eminence HL10A, although this one has a prototype HL10C driver. The difference is the C model is 4 ohms and has a smaller 0.75" cooling vent. Other than that, performance appears to be identical.

Specifications:

Weight: 65lbs
Dimensions: 24" x 24" x 24"
Power handling: 300wrms
Impedance: 6Ω or 12Ω (depending on driver)
Frequency range: 40Hz - 200Hz
Sensitivity: 102dB/W/M
Max Output: 128dB/M
Distortion at 100 watts: 5%

First, we measured impedance and found Zmin to be 6.0Ω. So 24.5v is required for 100 watts, 34.6v for 200 watts, 49v for 400 watts and 60v for 600 watts.

Next, we measured output at 28.28v. This is a little more than 100 watts. Since we measured 10 meters away, the values correspond to 2.83v/1M.

[align=center]

http://prosoundshootout.com/Measurements/Tuba24_28v.gif

[b]Tuba 24 response at 10 meters with 28.28v input (2.83v/1M)

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

http://prosoundshootout.com/Measurements/Tuba24_Impulse.gif

Tuba 24 Impulse Response

http://prosoundshootout.com/Measurements/Tuba24_Step.gif

Tuba 24 Step Response

Measurement at 100 watts:

http://prosoundshootout.com/Measurements/Tuba24_100watts.gif

Tuba 24 response at 10 meters with 24.5v (100w) input (1W/1M)

The blue line is SPL, and the violet line shows distortion. Average distortion is 25dB under the fundamental, which is about 5%. 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.

Measurement at 200 watts:

http://prosoundshootout.com/Measurements/Tuba24_200watts.gif

Tuba 24 response at 10 meters with 34.6v (200w) input

Output at 200 watts measured at 10 meters is about 105dB average between 70Hz and 170Hz, which is 125db at 1 meter.

Measurement at 400 watts:

http://prosoundshootout.com/Measurements/Tuba24_400watts.gif

Tuba 24 response at 10 meters with 49v (400w) input

Output at 400 watts measured at 10 meters is about 108dB average between 70Hz and 170Hz, which is 128db at 1 meter.

Measurement at 600 watts:

http://prosoundshootout.com/Measurements/Tuba24_600watts.gif

Tuba 24 response at 10 meters with 60v (600w) input

Increasing power from 400 watts to 600 watts results in little increased acoustic output.

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[Message index]

		Hornsub shootout By: Wayne Parham on Sun, 24 July 2005 20:22
		Ground Pounding Action, action, action! By: Wayne Parham on Tue, 02 August 2005 03:25
		General test plan By: Wayne Parham on Sat, 03 September 2005 23:45
		Re: General test plan By: Leland Crooks on Sun, 04 September 2005 19:19
		Re: General test plan By: Wayne Parham on Mon, 05 September 2005 03:14
		Re: General test plan By: Rory B. on Wed, 14 September 2005 07:51
		Re: General test plan By: Wayne Parham on Wed, 14 September 2005 22:00
		Re: General test plan By: Leland Crooks on Thu, 15 September 2005 07:21
		HL10 cooling plug and heat exchanger By: Wayne Parham on Fri, 16 September 2005 06:20
		Specific test plan By: Wayne Parham on Thu, 13 October 2005 17:56
		Re: Hornsub shootout By: PG on Thu, 08 September 2005 12:10
		Re: Hornsub shootout By: Wayne Parham on Fri, 09 September 2005 01:27
		Scheduled date and bad weather date By: Wayne Parham on Wed, 21 September 2005 13:21
		Re: Scheduled date and bad weather date By: jeffhtg on Tue, 27 September 2005 18:00
		Re: Scheduled date and bad weather date By: Wayne Parham on Tue, 27 September 2005 20:36
		Re: Scheduled date and bad weather date By: jeffhtg on Wed, 28 September 2005 01:43
		Re: Scheduled date and bad weather date By: Wayne Parham on Wed, 28 September 2005 11:57
		Hotels By: Wayne Parham on Wed, 21 September 2005 14:38
		Facilities and Photos By: Wayne Parham on Wed, 21 September 2005 16:17
		Re: Hornsub shootout RESULTS By: Wayne Parham on Sat, 15 October 2005 11:02
		Re: Hornsub shootout RESULTS - 12π By: Wayne Parham on Sat, 15 October 2005 13:20
		Re: Hornsub shootout RESULTS - 12π By: cred_audio on Mon, 17 October 2005 08:01
		Re: Hornsub shootout RESULTS - 12π By: Wayne Parham on Mon, 17 October 2005 09:14
		Re: Hornsub shootout RESULTS - 12π By: Josh Billings on Mon, 05 March 2007 12:32
		Re: Hornsub shootout RESULTS - 12π By: Wayne Parham on Mon, 05 March 2007 13:02
		Re: Hornsub shootout RESULTS - 12π By: Josh Billings on Mon, 09 April 2007 01:28
		Re: Hornsub shootout RESULTS - 12π By: Wayne Parham on Mon, 09 April 2007 02:06
		Re: Hornsub shootout RESULTS - Bassmaxx Z5 By: Wayne Parham on Sat, 15 October 2005 13:20
		Re: Hornsub shootout RESULTS - Bassmaxx Z5 By: Wayne Parham on Mon, 17 October 2005 10:10
		Re: Hornsub shootout RESULTS - Tuba 24 By: Wayne Parham on Sat, 15 October 2005 13:20
		Re: Hornsub shootout RESULTS - DR250 By: Wayne Parham on Sat, 15 October 2005 13:36
		Re: Hornsub shootout RESULTS - DR250 By: Leland Crooks on Sat, 15 October 2005 18:48
		Re: Hornsub shootout RESULTS - DR250 By: Wayne Parham on Sun, 16 October 2005 04:13
		Re: Hornsub shootout RESULTS - DR250 By: Timebomb on Sat, 29 October 2005 18:09
		Re: Hornsub shootout RESULTS - DR250 By: Wayne Parham on Sun, 30 October 2005 09:54
		Re: Hornsub shootout RESULTS - DR250 By: Leland Crooks on Mon, 31 October 2005 07:54
		Re: Hornsub shootout RESULTS - DR250 By: Timebomb on Tue, 08 November 2005 13:41
		Re: Hornsub shootout RESULTS - DR250 By: Leland Crooks on Tue, 08 November 2005 16:27
		Re: Hornsub shootout RESULTS - DR250 By: Timebomb on Tue, 08 November 2005 16:40
		Re: Hornsub shootout RESULTS - DR250 By: Leland Crooks on Tue, 08 November 2005 17:46
		Re: Hornsub shootout RESULTS - DR250 By: Timebomb on Tue, 08 November 2005 18:21
		Re: Hornsub shootout RESULTS By: Mike.e on Sat, 15 October 2005 22:50
		Re: Hornsub shootout RESULTS By: Wayne Parham on Sun, 16 October 2005 04:09
		My impressions By: akhilesh on Sun, 16 October 2005 13:14
		Re: My impressions By: Wayne Parham on Sun, 16 October 2005 15:46
		Re: My impressions By: akhilesh on Mon, 17 October 2005 08:35
		Re: My impressions By: Wayne Parham on Mon, 17 October 2005 09:10
		Re: My impressions By: freddyi on Mon, 17 October 2005 20:07
		Re: My impressions By: Wayne Parham on Mon, 17 October 2005 21:16
		Re: My impressions By: freddyi on Tue, 18 October 2005 07:44
		Re: My impressions By: Wayne Parham on Tue, 18 October 2005 09:06
		Re: My impressions By: freddyi on Tue, 18 October 2005 10:06
		Re: My impressions By: Wayne Parham on Tue, 18 October 2005 12:00
		Re: My impressions By: freddyi on Tue, 18 October 2005 12:30
		Re: My impressions By: Wayne Parham on Tue, 18 October 2005 12:46
		Usage of Zmin By: Mike.e on Wed, 19 October 2005 19:52
		Re: Usage of Zmin By: Wayne Parham on Thu, 20 October 2005 08:33
		Tuba30 By: PG on Tue, 18 October 2005 18:17

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