stevie

They were bass guitar drivers, although I believe they worked with guitar too. If they sound anything like the later K140, to which they are closely related, I'm sure you'll like them. However, because of their vintage, power handling is a bit limited. I think they were (perhaps rather conservatively) rated at 75W rms. Give 'em a try. You too can build an original Sunn 2 x 15"! Some interesting info here: [url="http://bassoutpost.com/index.php?topic=2555.0"]http://bassoutpost.com/index.php?topic=2555.0[/url]

[quote name='mep' post='645250' date='Nov 4 2009, 01:58 PM']I have had my Trace Series 6 AH200 GP12 Head for years now. I usually use the 12 band graphic to get my sound, but have recently gone to the mid pre-shape which sounds the dogs dangly bits with my 2 band MM stingray 4. So, do you use the mid pre-shape or graphic? If the graphic (7 or 12 band) then what eq settings.[/quote] The pre-shape is too much for me: it gives me too much bass and too much top. I just set a slight smile on the graphic centred at 600 Hz (or thereabouts), which gives me something similar but not quite as extreme. It all depends on your speakers and your bass though - and the sound you're looking for.

[quote name='Musky' post='647118' date='Nov 6 2009, 12:05 PM']What was the exception you had in mind Stevie?[/quote] I was thinking of the LAB12 woofer that Eminence built (and still builds) for Tom Danley's Lab horn, which was more advanced in certain respects than the drivers Eminence was making at the time. It has an xmax of 13mm, for example.

[quote name='BOD2' post='646111' date='Nov 5 2009, 11:28 AM']Please do not remove the earth connection from a mains plug for any reason.[/quote] I'm typing this message from a bed in the A and E department of the local hospital. Fortunately, the ambulance arrived quickly and had a cardiopulmonary resuscitator on board. As I am finding it difficult to stop my typing fingers shaking, I might not be posting for a while. However, I will be happy to read and try out more of your ideas when I get back home.

[quote name='bill1988' post='645828' date='Nov 4 2009, 11:07 PM']Also what's the most you would pay for this in it's current condition?[/quote] About 5p. The saddle looks simple enough to have fabricated by a workshop.

OK, thanks guys, I appreciate the help. I looked at the Guitar Nuts site, 7 string, which is excellent, but doesn't give me the very specific answer I need. The two units are plugged into the same power socket, by the way, BOD. I moved the Behringer away from the Trace - no difference. I plugged my battery-powered compressor between the Behringer output and the Trace - no difference. However, if I plug the Behringer into the standard bass guitar input on the Trace (rather than the power amp section input), the buzzing is still there, but at a *much* lower level. With the master volume (power amp volume) at zero, I can turn the preamp volume up full and the the buzzing stays the same. It only increases when I turned the master volume up. When I get around to doing it, I'll be using the balanced out into a separate power amp anyway. I would like to know what the devil is going on here.

[quote name='Bill Fitzmaurice' post='644375' date='Nov 3 2009, 01:47 PM']There are no OEM 'super drivers' with specs that can't be very nearly duplicated with an off the shelf unit.[/quote] This goes to the heart of the matter. No bass cabinet manufacturer goes to his speaker supplier and says ' I want something that is better than your top of the range speaker'. They are all, to a large extent, box stuffers, and want to hide the fact that they are just sticking a very average driver in a box and charging a lot of money for it. They will, however, ask their speaker supplier if it's possible to reduce the price by a few dollars (hence the lack of push terminals mentioned earlier). I can think of one exception, but that probably proves the rule, as they say. The only cabinet manufacturer who seems to be open about what he fits is our own Alex, but he is one of the few bass cabinet builders fitting premium quality drivers. The smaller driver manufacturers are a lot more flexible as far as custom drivers are concerned, but even here, there are limits.

Received a Behringer V-Amp from James at the weekend. The whole transaction was as smooth as a baby's bottom. Thanks, James.

[quote name='BOD2' post='643850' date='Nov 2 2009, 08:53 PM']Oh ... I should add - check that the V-amp isn't picking up external noise. Try moving it to another location away from the amp and any power cables or power adaptors just to rule this out.[/quote] Good point. I'll try moving the V-Amp well away from the Trace later today. Funny that the TC Electronics preamp isn't affected though, using exactly the same instrument lead and mains cable and sitting right on top of the Trace. I'm using a 1-foot instrument cable into the Trace power amp input. Re your earlier post, BOD, the hum occurs on all the unbalanced outs from the Behringer, even when the Behringer is switched off (and the mains socket is switched off). The hum goes away if I disconnect the mains lead from the V-Amp or if I unplug the signal cable between the V-Amp and the Trace.

[quote name='danlea' post='643792' date='Nov 2 2009, 08:09 PM']Do you not have an earth lift on the Trace to try?[/quote] Yes, and I've tried it but it makes no difference. Isn't it designed to work with balanced connections? When I tried the earth lift, I still measured continuity between the earthing point on the IEC socket and all of the jackplug earths, although I've no idea how significant that is - if at all.

[quote name='BOD2' post='643490' date='Nov 2 2009, 03:41 PM']Which outputs on the V-amp are you using ? Is it an XLR output or a jack output ? And the input on the Trace - is it XLR or jack ?[/quote] I'm using the various unbalanced line outputs from the V-Amp into the unbalanced line in or power amp in on the Trace. Both mono jacks.

I plugged the Behringer in to my M-audio USB soundcard connected to my laptop and then my hi-fi. No problem. Sounds great through all outputs. The plot thickens. And no answer in sight. C'mon guys, somebody must know something.

Just bought a Behringer Bass V-Amp Pro. I plugged it in to the preamp/line in on my Trace head and it buzzes like crazy. It's unusable. I'm not exaggerating - it's dire. It sounds fine through headphones via the phones outlet. However, if I take a signal from the phones out into the Trace, I get the same awful buzzing. All the various unbalanced outs on the Behringer are the same (pre DSP, post DSP, line out, etc.) The buzz sounds just like the slight physical buzz that I can hear from the mains transformer on the Behringer if I listen very closely. The ground lift on the Behringer makes no difference, but I suspect that may not be working. Now, the odd thing is that I don't even have to switch the Behringer on for this to happen. As long as the the power lead is in the Behringer and plugged into the wall (the wall outlet can even be switched off), and the unbalanced out is plugged into the Trace, I get the buzz. This does not happen with my TC Electronics preamp, which is as quiet as a mouse when plugged into exactly the same mains sockets and amp. All right, sleuths, you have all the information you need. Enlighten me!

[quote name='RhysP' post='641823' date='Oct 31 2009, 12:41 PM']I wouldn't expect a standard set up to include anything to do with the electrics; it'd just be neck relief, bridge adjustment & a new set of strings.[/quote] I had a setup done by Hugh Manson, who cleaned the pots and replaced the battery as a matter of course. So, some luthiers do it.