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Unity horn build |
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snowflake 
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Joined: 29 December 2004 Location: Bristol Status: Offline Points: 3097 |
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 Topic: Unity horn buildPosted: 04 February 2013 at 5:10pm |
    haven't made any noise with it yet as I am rushing to leave on holiday. will post more next week... |
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Lee In Montreal
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Joined: 09 March 2011 Location: Montreal Status: Offline Points: 345 |
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Posted: 04 February 2013 at 5:22pm |
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Very interesting. Useable frequency range?
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Teunos
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Joined: 23 November 2008 Location: The Netherlands Status: Offline Points: 1793 |
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Posted: 04 February 2013 at 5:42pm |
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Celestion mids and beyma cd10fe highs?
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Best regards,
Teun. |
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snowflake
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Posted: 04 February 2013 at 5:48pm |
yep celestions and the 1.4" version of the beyma. predicted to do 280Hz to 16kHz |
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Phil B
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Joined: 21 November 2004 Location: Melbourne Status: Offline Points: 2313 |
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Posted: 06 February 2013 at 11:21am |
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What size ports are you using with those Celestions? And what size are the Celestions?
They don`t look like the TF0410MR`s we`re using in our Unities?? Also are you going to add an extra tap to get the box down lower? .p. |
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snowflake
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Posted: 06 February 2013 at 12:26pm |
the ports are 1" and the mids are 6". sims say the port speed should be ok. I've left room in the design for two 10" drivers but haven't worked out how to get wide bandwidth from them yet. as the sensitivity of the bottom section won't be great am thinking I might cover 70-280Hz with a separate front-loaded horn or ported horn.
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Phil B
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Posted: 06 February 2013 at 8:59pm |
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I`d personally stick with keeping the 10"s in the Unity and get full range coverage from one source. You are using a sealed box already so have a rear volume to start with?
Our Mkii horns will have 2 x 10" per box and will be slightly bigger than the Mki`s to allow the horn to work down to 100hz. It`s looking like the P-Audio SN 10 MB is the cheapest , best simming driver at the moment.... we`re still trying to get T/S parameters on all the weird and wonderful car audio drivers available here in Aus! Might be a contender hidden in there... .p. |
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snowflake
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Posted: 06 February 2013 at 10:05pm |
i've managed to get sims with response down to about 100Hz but I thought it should be possible to get lower than this? would like to get to 80Hz or 70Hz so they could be used as monitors. some of danley's designs claim to get response down to 50Hz with two 12" drivers. he seems to port the volume in front of the cone and the rear volume into the horn so I guess this is a 6th order bandpass. my boxes will have a sealed volume above and below the horn module and another volume to the sides and rear which could be connected if I make some holes through the vertical flare pieces. the photos don't show the back panel glued in yet. have you looked at faital pro 10hp1020"? - that's what I've been using in my sims have you got a link to your mkii horn?
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Phil B
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Posted: 06 February 2013 at 10:21pm |
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We looked at the Danley porting method as well, it uses the rear volume then short tube ports back into the horn mouth so possibly a 6th order. We`ve done sims with simple ports under the front of the driver and rear not ported and ported on short tubes.
Here`s unported 10" Ande and P-Audio in Mkii horn  And same drivers in ported  So 80hz is possible quite easily...getting the rear ported in phase and with good port velocity...that`s the trick! Mkii hasn`t been built yet but will be a 1m horn loaded with: 1 x RCF ND 2530 ( just bought these...super nice drivers!) 4 x Celestion TF0410MR (sealed back 4") 2 x 10" ( P-Audio or something else with low qts and high qms which seems to sim best) Hopefully in the next two weeks we`ll get a prototype done! .p. |
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snowflake
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Posted: 07 February 2013 at 2:09pm |
what voltage is your input for those graphs? is it parallel drivers into 4Pi? cheers Phil?
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Phil B
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Posted: 08 February 2013 at 9:42am |
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Hi
2.83v and parallel into 2 pi ( I think as my mate Richie has the info on his laptop!). Those are just rough sims as we haven`t decided on the final rear volume or how we will port it back in ... .p. |
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CoblosBrengose
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Posted: 09 February 2013 at 8:31am |
Hi Phil Have you actually seen inside dsl box? From iso wire frame images on the dsl website there aren't tube ports..only simple holes Edited by CoblosBrengose - 09 February 2013 at 8:37am |
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Teunos wrote: