![]() ![]() Next I will play with stuffing to see how that effects the overall balance, then the last job is to make it battery powered! The plan is for this speaker to live in my workshop, take to parties (you know, those friends that don't have good speakers) or be used as my primary speaker(s) if I ever move to a place that is more space limited.Ī while ago a packing case appeared at work, and it was ok for me to nab the lid ( 5mm ply with soft wood battens stapled around the lip ), so I made these. ![]() I'm used to much more sophisticated 2-way speakers that I built so I'm a little spoilt But really, my overall goal was for this unit to sound better than the best "portable" speaker, and I think I've achieved that (just don't ask me if it was cheaper to build!) Imaging is limited due to how close together the drivers are but instrument separation is respectable. Sound is good - not incredible - but definitely good. The cabinet ended up being extremely stiff with the composite wrap, 25mm overall baffle thickness and oak bracing. It would be less efficient, less dynamic and have lower potential spl.Īs for imaging, don't full range drivers basically all image very well? I don't know what would make a full range driver image poorly, unless it would be poor performance in the treble.Here it is! I really wasn't sure what to expect for the final look but I'm very satisfied - the colour scheme has a retro vibe about it. I have not used the Fostex 167 myself, but I did study up on full range stuff at one point, and I think with that driver in a quarter wave transformer you would get lower bass, more linear response, less beaming, greater extension into the treble and possibly less distortion. ![]() The D131 uses the same motor for a 12" cone as the D130 uses for a 15", so it is like dropping a big Lincoln flathead V8 into a Ford chassis. Maybe Jim Lansing was experimenting with some hotrodding. I don't think it is a great candidate for full range hi fi, although it would definitely be fun to listen to for awhile. It and its successors (D120, 2130 and E120) have found use mostly in musical instrument amplification. That aside, it is a multo dynamic, articulate driver, although its frequency response is far from linear. For full range, the D131 would give more treble than the D130, but still not very good. It was supposedly meant to give nearly identical performance to the D130 in situations where there simply was not enough space for the enclosure size the D130 required, but in JBL literature the enclosure sizes recommended for the two drivers are mostly the same. The D131 is one of my favorite drivers (see my avatar), but I've never quite understood the reason for its existence. You probably should seek out the full range guys for an answer to this question. ![]()
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January 2023
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