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New Push-Pull 15"

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Tony Wilkes View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tony Wilkes Quote  Post ReplyReply Direct Link To This Post Posted: 04 October 2011 at 12:34pm
Originally posted by mykey- mykey- wrote:

nice

similar to DJK's?


Exactly, he has convinced me to at least give it a go.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote soundchippy Quote  Post ReplyReply Direct Link To This Post Posted: 04 October 2011 at 6:54pm
any thought on whether this driver arrangement would yield any benefit to a double bp6?
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Tony Wilkes View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tony Wilkes Quote  Post ReplyReply Direct Link To This Post Posted: 04 October 2011 at 7:22pm
Different beast altogether, the sole purpose of a BP6 is to make use of the extra gain from the pass band loading. It results in a louder cab than a standard reflex but also comes with a downside.

The cab as shown is optimised for B6 loading which gives good extension in a compact enclosure but requires external processing to achieve this.

The so called Push-Pull loading gives the advantage of lower 2nd and 3rd harmonic distortion which results in very clean bass. Group delay is also very low in this design.

Tony
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Post Options Post Options   Thanks (0) Thanks(0)   Quote soundchippy Quote  Post ReplyReply Direct Link To This Post Posted: 04 October 2011 at 7:37pm
i understand that. what i am curious about is whether the push/pull loading and a bp6 design could be married to create the best of both worlds. low distortion/group delay and higher output thanks to bp6 design.

think of it as having the slot area ported making it the front chamber.

i'm not talking about using a b6 alignment.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve_B Quote  Post ReplyReply Direct Link To This Post Posted: 04 October 2011 at 11:19pm

Tony I just saw push pull and though of an isobaric type come movement rather than push push where the air in the cabinet and V slot is compressed even if one of the drive units is reversed.

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Tony Wilkes View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tony Wilkes Quote  Post ReplyReply Direct Link To This Post Posted: 05 October 2011 at 7:59am
It confused me at first but it does seem to have become a generic name for them.

Hope you are well mate,

Tony
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Post Options Post Options   Thanks (0) Thanks(0)   Quote geez Quote  Post ReplyReply Direct Link To This Post Posted: 08 January 2012 at 12:44pm
Tony, I've spent some time reading up on these and the B6 alignment for a potential experimental project of my own so this is a really interesting post for me.

How would you do the required processing using a DCX? from what i've read you need +6db of gain at Fb with Q=2. The DCX only gives a Q adjustment on it's bandpass filter. If a potential B6 cab had an Fb of say 35Hz how would you set the low crossover point and an additional filter to correct it to flat?

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Post Options Post Options   Thanks (0) Thanks(0)   Quote neonogin Quote  Post ReplyReply Direct Link To This Post Posted: 05 March 2012 at 4:45am
Looks very similar to the Ohm Pukk 212 / 215 / 218 box if you look inside.

http://www.ohm.co.uk/download/DATASHEET/PUKK-218%20Datasheet.pdf

I wonder if that is B6 loaded too ???
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Tony Wilkes View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tony Wilkes Quote  Post ReplyReply Direct Link To This Post Posted: 05 March 2012 at 7:24am
Originally posted by neonogin neonogin wrote:

Looks very similar to the Ohm Pukk 212 / 215 / 218 box if you look inside.

http://www.ohm.co.uk/download/DATASHEET/PUKK-218%20Datasheet.pdf

I wonder if that is B6 loaded too ???


Yes AFAIK the Ohms are B6 slot loaded like djk's, they use great drivers as well :)

Tony
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Disco Stu Quote  Post ReplyReply Direct Link To This Post Posted: 05 March 2012 at 9:05am
Tony did you say you managed to squeeze 2x15" into 95l? 

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Tony Wilkes View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tony Wilkes Quote  Post ReplyReply Direct Link To This Post Posted: 05 March 2012 at 2:09pm
Originally posted by Disco Stu Disco Stu wrote:

Tony did you say you managed to squeeze 2x15" into 95l? 

Stu


Yes mate but that's net volume, the total volume of the box is larger because of the chamber. Actual box sizes are 750w x 500h x 550d.

Tony
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Chaps Quote  Post ReplyReply Direct Link To This Post Posted: 16 April 2012 at 6:07pm
Did this box ever become reality? Smile
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