sub-sat system
Printed From: Speakerplans.com
Category: General
Forum Name: 12v Powered Systems
Forum Description: From Mini-rigs to ICE, all your low voltage audio needs here...
URL: https://forum.speakerplans.com/forum_posts.asp?TID=102829
Printed Date: 16 April 2024 at 11:51pm
Software Version: Web Wiz Forums 12.06 - https://www.webwizforums.com
Topic: sub-sat system
Posted By: boots-hifi
Subject: sub-sat system
Date Posted: 07 November 2018 at 9:20pm
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A very good freind of mine was looking for some cheapish speakers to use in his garage and at the occasional house party. With a budget of £300 I decided it would be better (probably) and much more fun to build something for him. Ive settled at the moment on using an 8" Peerless SLS-P830667 bass driver mounted in 60L box tuned to 30hz. Covering the upper frequencies two Dayton RS100-4 4" crossing over around 180-200hz in a single sealed 0.10 litre box. Using win ISD ive came to the enclosure volumes. This will be my first time building anything from scratch so its all a bit of an experiment at the moment! At the rear of the bass enclosure a sure 2~300w TAS5630 amplifier, Sure bluetooth unit, Digitally controlled volume pot and mini DSP to tune the unit using R.E.W. I need to source a decent PSU, Sure's published ratings are 48v. As he can get his hands on BB Grade birch ply for nothing (he works on film sets) I was going to knock up a dummy box and take some measurements once ive figured out everything. Any thoughts or advice would be greatly apriciated. |
Replies:
Posted By: bee
Date Posted: 07 November 2018 at 10:17pm
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the maths look solid, sounds like a good plan. ------------- https://www.elements-audio.com |
Posted By: boots-hifi
Date Posted: 07 November 2018 at 10:46pm
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The other option which ive been playing with is 90l box tunes to 45hz using a JBL 2206h driverI have spare. This will save money, but there not exactly the most effecient of drivers so ill probably end up needing bigger amp moduals/power supplys etc thus costing more eventually. |
Posted By: Greg32
Date Posted: 11 November 2018 at 10:31am
| have a look at the tham12 taped horn for the 2206. |
Posted By: Guests
Date Posted: 11 November 2018 at 11:19am
| Have a look at meanwell for the PSU, they do PFC and non PFC supplies, and in my usage have been reliable |
Posted By: boots-hifi
Date Posted: 12 November 2018 at 4:47pm
| Cheers. Ill look at those supplies. Ive ordered all the bits now, just waiting on delivery. |
Posted By: boots-hifi
Date Posted: 16 November 2018 at 10:50am
| All the bits from Soundimports arrived yesterday so im going to try and start the build this weekend-weather permitting! |
Posted By: boots-hifi
Date Posted: 05 December 2018 at 10:13pm
| I’ve now built both tops and sub, and overall I’m very happy with the sound of the system. Only niggle I have is the the hf is a bit much. If I introduce EQ above 5k to counter act I seem to loose to much in quality, so can I use a resistor to reduce the output of the HF? I don’t really want to use an l-pad attenuators. The 5” and dome tweeter run passive through a passive 2k crossover as the 5” starts to tail off there and the tweeter starts. I’ve used REW to measure this. I’ll get some build pics up soon. |
Posted By: cravings
Date Posted: 05 December 2018 at 11:33pm
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an lpad really is just a resistor though.. and another to maintain impedence. https://www.speakerplans.com/rvalues.jpg" rel="nofollow - https://www.speakerplans.com/rvalues.jpg |
Posted By: boots-hifi
Date Posted: 06 December 2018 at 7:09am
| Cheers Cravings. I did do a search, wasnt being lazy-just not very well it would seem! |
Posted By: boots-hifi
Date Posted: 06 December 2018 at 10:36pm
Ordered a few different resisters, ended up taking -7db of the Hf . Pretty happy with the outcome. My mates coming over for a demo tomorrow to see if I’ve wasted his money or not! I’ve got a feeling he’ll want another set built but he can jog on till after Christmas the wife’s already got the hump with me “sticking my dick in speakers” her words-not mine
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Posted By: boots-hifi
Date Posted: 19 December 2018 at 7:59pm
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Posted By: boots-hifi
Date Posted: 19 December 2018 at 8:02pm
| Build completed. What to do next! |
Posted By: I-shen Soundboy
Date Posted: 19 December 2018 at 8:08pm
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Rag them at a party in your mates garage? Laying on a bucket of beers is the least he should do, after all your hard work.
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Posted By: boots-hifi
Date Posted: 19 December 2018 at 9:19pm
| The build will be off to a Apre Ski party Friday night and then who knows! Not quite 12V but there isn’t a mini rig section (I haven’t seen it) Would be quite easy to hook up some batteries if required. |
Posted By: mini-mad
Date Posted: 19 December 2018 at 11:39pm
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I hope they got a good sand down before painting! Looks like a pretty little system there. A pair would be more then enough for a little house party (at a conservative level)... or some smooth jazz in the corner of a modern bar. Lovely little build that. Well done sir! ------------- If it sounds like a gorilla is trying to escape, turn it down. |
Posted By: JonB67
Date Posted: 20 December 2018 at 7:40am
| Tidy work boots! Nice job. Always nice to see people making sawdust! |
Posted By: boots-hifi
Date Posted: 20 December 2018 at 7:54am
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Well sanded/painted with Tuff Cab (F1 purple as it adds 3db ). I’d usually spray them with Warnex or a pre-cat but my compressor had died so I opted for Tuff-Cab. Despite everyone’s opinions about its ‘Tuff’ness I’m happy with the results. Probably ideal for this scenario. My plan is to build another identical pair in the new year. These will be passive , I’ve got room for another amp module in the back and the PSU was purchased with this in mind. A mini DSP unit was used, which are great value and I’ve used a passive 2k on the tops it gives me two more dsp channels to play with. For its size this little system packs a punch. My kitchens around 9m by 5m and it’s plenty loud enough for that. Markiee has sold me some 8” Volt drivers which are my next project combined with a pair of scanspeak silk dome tweeters for the living room. I’ll keep this post up to date once the second mini rig is built and hopefully with some action photos on Friday night.
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Posted By: concept-10
Date Posted: 20 December 2018 at 10:09am
Nice build bud like it a lot, I'm a big Volt fan, if they are the older 8 inch model that Markie had then they are stonking drivers, keep up the good work 
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