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boots-hifi View Drop Down
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    Posted: 07 November 2018 at 9:20pm
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.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bee Quote  Post ReplyReply Direct Link To This Post Posted: 07 November 2018 at 10:17pm
the maths look solid, sounds like a good plan.
https://www.elements-audio.com
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Post Options Post Options   Thanks (0) Thanks(0)   Quote boots-hifi Quote  Post ReplyReply Direct Link To This Post Posted: 07 November 2018 at 10:46pm
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.
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Greg32 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Greg32 Quote  Post ReplyReply Direct Link To This Post Posted: 11 November 2018 at 10:31am
have a look at the tham12 taped horn for the 2206. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote freddymendez Quote  Post ReplyReply Direct Link To This Post 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
120-140 bpm, pianos and bass.
diesel, the fuel of professionals.
mendez/manchester
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Post Options Post Options   Thanks (0) Thanks(0)   Quote boots-hifi Quote  Post ReplyReply Direct Link To This Post Posted: 12 November 2018 at 4:47pm
Cheers. Ill look at those supplies. Ive ordered all the bits now, just waiting on delivery.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote boots-hifi Quote  Post ReplyReply Direct Link To This Post 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!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote boots-hifi Quote  Post ReplyReply Direct Link To This Post 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.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cravings Quote  Post ReplyReply Direct Link To This Post Posted: 05 December 2018 at 11:33pm
an lpad really is just a resistor though.. and another to maintain impedence.

https://www.speakerplans.com/rvalues.jpg
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Post Options Post Options   Thanks (0) Thanks(0)   Quote boots-hifi Quote  Post ReplyReply Direct Link To This Post Posted: 06 December 2018 at 7:09am
Cheers Cravings. I did do a search, wasnt being lazy-just not very well it would seem!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote boots-hifi Quote  Post ReplyReply Direct Link To This Post 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 mineLOL

Edited by boots-hifi - 06 December 2018 at 10:37pm
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