Over the course of the last month I've been building an Omni 15TB for use as a bass cab, I went with the recommended drivers, including the Compression driver.
Before this I was playing through either a Peavey BX 1x15 or a Trace Elliot 4X10, depending on whether I could be bothered to lug the dead weight of the Trace to gigs. I also do a few dep. gigs where a backlin is supplied, usually and ampeg 6x10 (sometimes 8x10 sometimes 4x10).
If you are interested you can view my build thread here:
http://basschat.co.uk/index.php?showtopic=11971
or here
http://www.finnbass.com/showthread.php?t=1906
So how does it sound?
Most peoples first response is loud and yes it is noticeably louder than either of my other cabs at similar settings, but that wasn't my overall impression, 3 words ... PUNCHY .... DEEP ... CLEAR ...
The clarity of the sound is amazing, all of my little mistakes it picks up - for example resting my thumb on the B string you can hear when I knock the string against the pickup.
The sound is really really HiFi and does come through as Bass, Middle, and Treble. When I turned up or down one of the controls on my bass the corresponding speaker got noticeably louder or quieter! I know it's designed to do this but it still blows me away, and spent ages with a stupid grin on my face doing exactly this.
The top end is crystal clear, and I have found myself backing off the treble more than I would in the past. When you slap at volume I'd advise you sit well back, the top end is truly eye popping
Midrange is really really punchy for a single 8" speaker, and not like many 4x10's with that kind of grunty sound but a much more clear and defined note that doesn't distort. I've always used solid states and relied on cabs to give me that little bit of grunt, however since I've been playing this I've had the 'warm' button (basically a valve emulator) on my amp permanently on, as is the grin on my face
The low end is just awesome, it is a really clear deep bass that doesn't boom, and projects well, and handled every low B I threw at it with ease. I found with this cab I didn't need the 'bass boost' on my amp turned on (I would normally have it on), as it already sounds sweet and deep and coupled with the other drivers sounds great.
Last night I had the chance to use this with my band at Rehersals, Without doubt it's the best sounding cab I've ever used. My main gig is with an 11 piece funk/hip hop band, hearing yourself in the mix can often be an issue (especially as our keyborad plyaer has a very busy right hand)
As all BFM builders will tell you it is noticeably louder, I had the volume at about two thirds of what it would normally be, couple that with the clarity and you;re onto a winner.
With my previous set up I find you have the choice between either deep bass or clear mids and definition, often finding that if you want a really fat bass sound you loose clarity and definition with some of the more subtle parts of your playing. Often I found myself 'over EQing' to try and compensate for this and further muddying my sound.
With the Omni15TB you have both, the deep low notes were really fat and subby, yet when I filled, played dead notes etc these were not lost and sat just as clearly in the mix. I set my EQ fairly flat, with the treble backed off slightly, and the bass boosted a little, sweet tonal heaven:)
A great added bonus is that I wasn't expecting just how much my pedals come to life with this, effects are just so much more transparent and audible, a lot of the 'effect' comes from the midrange speaker, with the 15" holding down the low end, meaning that (as is sometimes the case) you don't loose the bass or volume when you switch on your effects.
..simply awesome
and I made it !
A lot of people have asked me about size and portability, and it is a big cab comparble to the size of a 6x10, but way way lighter, it's lighter then either of my other cabs. IMHO it smacks an Ampeg 6x10 in every imaginable way - sound, portability, volume, looks, weight - although I do really dislike those Ampeg cabs (all image no content), they do that 'Grunty' Thing I mention above
Transporting the kit back to mine I realised one of the things that I like the best about the cab...
look at that fits perfectly in me boot. This is the first gig sized cab I have ever owned that I don't need to fold the seats down for!
Thanks
Rob
). Anyway, great looking build you did there. I've been teetering between an O12 (maybe a pair) or an OT15. The OT15 won't fit in my car (a bit too deep, but a pair of O12s would interestingly), but then again, since I haven't done much gigging in quite a while, it's probably more for getting my jollies at home. That'll give me an excuse to build more cabs that do fit in my car, just in case 
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