Tapped horn for B&C 15TBX100 th115 style

Dref · 25th April 2011, 07:45 PM

Hi All

I have build a modified version of wood1y's horn, optimized for B&C 15TBX100.
Pictures can be found here:
Tapped horn for B&C 15TBX100 - Speakerplans.com Forums

Best Regards
Steffen

m R g S r · 26th April 2011, 05:49 AM

looks great very nice work! how does it sound?

Dref · 26th April 2011, 08:00 AM

Overall very nice. The only thing which it isn't superior to the little FLH i am comparing it to is its kick. The FLH has a faster and more direct kick.

It impresses me how well it is able to make prober bass outside even though it is a single cap.

weltersys · 07:23 PM

Quote:

Originally Posted by Dref

Overall very nice. The only thing which it isn't superior to the little FLH i am comparing it to is its kick. The FLH has a faster and more direct kick.

It impresses me how well it is able to make prober bass outside even though it is a single cap.

Your TH probably needs a top cabinet delayed by around 7ms to properly align with a top cabinet, without time alignment the TH will lag, sounding "slow".

Are you comparing each cabinet with proper time alignment and EQ with a top cabinet, or just the raw response of the two cabinets?

Noticed your test set up is fairly close to a brick "V" wall, which will reinforce low frequencies a bit over what they would be in actual half space.

I was surprised to measure an additional 4 dB in the octave around 40 Hz in a position about 15 feet from a pair of buildings compared to a position 45 feet from buildings.

Art

Djim · 27th April 2011, 03:46 AM

Maybe I'm wrong but didn't woody's cab had a +20ms group delay around its 1/3WL?

Djim · 04:31 AM

Was even worse (and I should use at least 10ms to align with your tops):

Dref · 27th April 2011, 10:51 AM

Quote:

Originally Posted by weltersys

Your TH probably needs a top cabinet delayed by around 7ms to properly align with a top cabinet, without time alignment the TH will lag, sounding "slow".

Are you comparing each cabinet with proper time alignment and EQ with a top cabinet, or just the raw response of the two cabinets?

Noticed your test set up is fairly close to a brick "V" wall, which will reinforce low frequencies a bit over what they would be in actual half space.

I was surprised to measure an additional 4 dB in the octave around 40 Hz in a position about 15 feet from a pair of buildings compared to a position 45 feet from buildings.

Art

I was only comparing the raw response i have not yet tried integrating it properly with some tops. I think the most useful information which can be drawn from my little measurement is the comparison between the two as they have had same measurement condition.

Here is my group delay sim:

I don't think it is only because of the group delay that i am not a fan of its kick. Here is plot of its simulated impulse response(black) compared to the FLH(red):

Djim · 27th April 2011, 12:11 PM

Dref, what is the Fs of the FLH system?

Dref · 27th April 2011, 12:28 PM

Actually the sim is done with a delta 10 as i couldn't find ts parameters for the EPS 10300L. The delta has an Fs of 66Hz.

Dref · 27th April 2011, 12:33 PM

The lowest impedance peak is at 44Hz with the delta in the FLH

25th April 2011, 07:45 PM	#1
Dref diyAudio Member Join Date: Dec 2009	Tapped horn for B&C 15TBX100 th115 style Hi All I have build a modified version of wood1y's horn, optimized for B&C 15TBX100. Pictures can be found here: Tapped horn for B&C 15TBX100 - Speakerplans.com Forums Best Regards Steffen

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26th April 2011, 05:49 AM	#2
m R g S r diyAudio Member Join Date: Jan 2011	looks great very nice work! how does it sound?

26th April 2011, 08:00 AM	#3
Dref diyAudio Member Join Date: Dec 2009	Overall very nice. The only thing which it isn't superior to the little FLH i am comparing it to is its kick. The FLH has a faster and more direct kick. It impresses me how well it is able to make prober bass outside even though it is a single cap.

27th April 2011, 03:46 AM	#5
Djim diyAudio Member Join Date: Dec 2009 Location: 'Ollanda	Maybe I'm wrong but didn't woody's cab had a +20ms group delay around its 1/3WL?

27th April 2011, 12:11 PM	#8
Djim diyAudio Member Join Date: Dec 2009 Location: 'Ollanda	Dref, what is the Fs of the FLH system?

27th April 2011, 12:28 PM	#9
Dref diyAudio Member Join Date: Dec 2009	Actually the sim is done with a delta 10 as i couldn't find ts parameters for the EPS 10300L. The delta has an Fs of 66Hz.

27th April 2011, 12:33 PM	#10
Dref diyAudio Member Join Date: Dec 2009	The lowest impedance peak is at 44Hz with the delta in the FLH

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