LawrenceH

[quote name='wotnwhy' post='645588' date='Nov 4 2009, 07:06 PM']a finer first post i think you will never see... welcome to the forum Lawrence! i think you'll be made very welcome here incidently, i assume from the lack of mention that you haven't had the hiss problem?[/quote] Thanks! I am amazed at the helpfulness of people out there amongst the bass community, so I feel it's only fair to contribute something back that I wasn't able to find, since there's so much useful info out there for free. Actually, there is some hiss. But whether it's a problem or not I can't yet say as I've not played at volume. However I noticed the hiss was additive between the two volume controls (pre and master). Since this was only noticeable from the pre when past 12 o clock I suspect that it will be more a problem with lower-output instruments as is usual in these cases. When mine arrived it was set to 12 both on pre and master. At this level the hiss is very noticeable, however I could not play at anything like that volume in my house! But if you turned it on at that level you'd definitely think something was amiss till you realised how hard you'd be driving it. I also think the accentuated midrange and extended top-end response make this noise far more noticeable than would otherwise be the case - but that's fine in reality since the musical output will be correspondingly higher - after all it's the ratio that matters. I'm sure many more amps suffer from this than is apparent simply due to running without mid/hi drivers. At least this hiss is very uniform, and I can't hear any mains hum whatsoever. I am curious about switching amp/speaker combinations with my cheap-o Ashdown EB12-150 but that's all on 1/4" jacks and I don't have the right stuff to convert at the mo. The Ashdown doesn't hiss at all (though there is a bit of hum) but then again if you run programme music through it, well there's bugger all happening above about 2k anyway!

Hi guys, Excellent forum! I found it after noticing the amazing tecamp deals at guitarguitar last Sunday, and trying to find out more about the brand, and work out if the deal was real! So I thought I'd come on here and post a little more info on the Tecamp stuff since there's not much available tech details online. This is all from the smallest combo, 110. First up, the loudspeaker is manufacturered by SICA (same as Jensen?) and appears to use the identical [s]cast alu[/s] [b]steel[/b] frame that they use in their [s]Premium Lite[/s] [b]Standard Lite[/b] range, of which there are several variants. Since Tecamp claim to use custom-designed loudspeakers then I assume it's tweaked a little bit (eg 300w Tecamp versus 250w standard power handling) but the Tecamp's own speaker designation LE10-65 indicates that it's a 65mm voicecoil, most likely based on this: [s][url="http://www.sica.it/pdf_ftp/Z005910.pdf"]http://www.sica.it/pdf_ftp/Z005910.pdf[/url][/s] [b] [url="http://www.sica.it/pdf_ftp/Z007811.pdf"]http://www.sica.it/pdf_ftp/Z007811.pdf[/url] [/b] With an Fs of 57Hz and a sensitivity of 95dB I think we can take the claimed 99dB sensitivity and 38Hz frequency response of the combo with a pinch of salt, however note that there is a hi-bass/low-mid hump around 200Hz which, given the separate mid-range driver and large ports, could make the sensitivity claim at least plausible depending on crossover frequency. A brief look at the loudspeaker specs shows an Xmax of [s]5mm[/s] [b]4mm[/b] which is [b]reasonably(!)[/b] promising. I thought that info might be useful to anyone on here who wants a matching cab to their Tecamp gear but, thanks to the excellent guitarguitar, have now acquired a piece of kit way beyond their normal budget range! Like me There are 12" and 15" drivers available in the same range and in 4 and 8 ohms. I also thought it'd be handy/informative as a comparison with the excellent info I've seen on here by Alexclaber in reference to his own cabs versus the fantasy claimed specs by larger manufacturers. When I get the chance I'll have a rough measure of the internal cab dimensions and run it through WinISD with that speaker to get an idea of what the cab is really capable of. Next up the amp. In my case the 350. It is built upon the same chassis as the standalone model, and even the backplate contains the appropriate holes for (2x) speakon out, power input, FX send etc. Moving the sockets across would be therefore be very straightforward and the only thing required to convert to standalone would be a new top plate. I'm tempted to do this! Overall cab design/build: Good-faced ply which I guess is a good indicator of it being reasonable quality. The amp is in a separate sealed cavity as is the midrange driver so no gross mistakes there although this will obviously cut down on internal volume significantly. For this reason, since the external dimensions exactly match those of the 110 standalone cab, I think the claimed 'meticulously calibrated enclosures to deliver expanded low end' could be somewhat hyperbolic. In the absence of a decent test space I'll see what WinISD says! In front of the amp cavity, the back wall is lined with acoustic 'egg-box' type foam that looks to be the proper stuff. There is no other acoustic wadding. A ply divider separating the ports doubles as cab bracing and is matched by another along the top. It sounds reasonably dead when given a rap with the knuckles, if that means anything. I don't yet know what the mid-range driver is nor the crossover frequency (couldn't see the crossover, was just poking a torch/dig cam through the generously-sized ports). Playing music through the cab reveals quite a strong mid-range (1-3k I'd guess) which to my ears sounded a little harsh but it seems to extend quite high. I think some attenuation would have been a useful feature for some apps. I hope this info is useful to someone! I'll post more when I have explored more thoroughly, including a pic or two of some innards if anyone cares. FWIW I'd be fascinated to know some of the specs on the B&C drivers Markbass use, to see how they match up to the claimed responses of their implausibly tiny cabs - especially those 15"-ers, and also on the cab bracing. Not enough of that type of info is out there IMO. [b] *EDITED as I realised I was wrong about the driver and I don't want people getting mislead if they do a quick search - poking around with a torch and a mirror I'd seen the magnet housing clearly which appears identical. Sorry! I've made the edits so you can see where I went wrong [/b]

Hi Tony, I once bought a secondhand SB320 and as I recall had a similar issue, it was solved by adjusting the little pot inside the cavity - I needed it all the way at one extreme to get a good balance I think. Hope you sort it, they're nice basses!