sub-sat system |
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boots-hifi
Old Croc Joined: 15 August 2011 Status: Offline Points: 2460 |
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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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bee
Old Croc Joined: 14 June 2011 Location: Middlesex Status: Offline Points: 4553 |
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the maths look solid, sounds like a good plan.
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https://www.elements-audio.com
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boots-hifi
Old Croc Joined: 15 August 2011 Status: Offline Points: 2460 |
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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.
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Greg32
Registered User Joined: 14 December 2004 Location: Australia Status: Offline Points: 116 |
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have a look at the tham12 taped horn for the 2206.
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Guests
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Have a look at meanwell for the PSU, they do PFC and non PFC supplies, and in my usage have been reliable
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boots-hifi
Old Croc Joined: 15 August 2011 Status: Offline Points: 2460 |
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Cheers. Ill look at those supplies. Ive ordered all the bits now, just waiting on delivery.
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boots-hifi
Old Croc Joined: 15 August 2011 Status: Offline Points: 2460 |
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All the bits from Soundimports arrived yesterday so im going to try and start the build this weekend-weather permitting!
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boots-hifi
Old Croc Joined: 15 August 2011 Status: Offline Points: 2460 |
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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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cravings
Old Croc Joined: 30 January 2007 Location: Ireland Status: Offline Points: 7441 |
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an lpad really is just a resistor though.. and another to maintain impedence.
https://www.speakerplans.com/rvalues.jpg |
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boots-hifi
Old Croc Joined: 15 August 2011 Status: Offline Points: 2460 |
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Cheers Cravings. I did do a search, wasnt being lazy-just not very well it would seem!
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boots-hifi
Old Croc Joined: 15 August 2011 Status: Offline Points: 2460 |
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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
Edited by boots-hifi - 06 December 2018 at 10:37pm |
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boots-hifi
Old Croc Joined: 15 August 2011 Status: Offline Points: 2460 |
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