obbm

Before going any further I would want to see the wiring schematic of said amplifier. I suspect that getting one is a bit like "blood/stone".

[quote name='mart' post='1140917' date='Feb 25 2011, 10:27 AM']There was a similar question yesterday, but that was a general question about running heads without cabs. My question was more specifically about whether headphones change this: on an amp where the headphone socket cuts the speaker output, is a load necessary [i]when using headphones[/i]?[/quote] It's an all-valve amp and therefore should have a speaker load attached at all times. Page 4 of the user Manual - Warning states "before the unit is switched on, the loudspeaker should be connected as describedin the handbook....." Even if plugging in headphones does disable the speaker output, the reflected load of the speker through the output transformer will have an effect on the output valve. The manual is very unclear so I would pick up the phone and ask Blackstar directly.

[quote name='Grand Wazoo' post='1140642' date='Feb 24 2011, 11:22 PM'][/quote] This particular quote does not cover away from home because whoever filled it in opted for [i]none[/i] of it to be covered away from the home location. I use Musicguard and have 50% insured away from home.

[quote name='mart' post='1139896' date='Feb 24 2011, 01:07 PM']I've just bought myself a tiny valve head.[/quote] It would be really helpful if you could tell us the make and model of this tiny valve head.

Valve power amps must always have a load. Solid-state power amps can work perfectly well without a load, i.e. with [i]nothing[/i] connected to the speaker sockets. As for whether the pre-amp is valve or solid-state - it doesn't matter.

Against my better judgement I end up doing both at the local jams. The songs are ones that I've played and sung for years and tend to be 12-bar based. Firstly the bass parts are fairly straightforward walking lines or just roots. I can pretty much play them automatically allowing my brain to concentrate on the lyrics. Trying to learn some new numbers at the moment and you're right, it isn't easy. How Phil Lynott, Macca or Sting do/did it beats me. The more difficult thing is controlling the band, some of whom I may have never played with before, playing bass and singing. Sometimes it just crashes and burns but mostly it's a great feeling when it all works out.

[quote name='Martin E' post='1130065' date='Feb 16 2011, 07:00 PM']We're playing at a surprise 60th birthday party soon and have been asked to play............ a couple of Shadows numbers![/quote] Get your fingers into Nivram. Great Jet Harris walking bass line.

Just fitted an J-Retro01 into my Pink 62RI. Ideal for the Jam environment where you have no time to adjust the amp settings. For those interested here are a couple of things Johns made earlier.

ACG (Note to self - must take a better picture as it doesn't do the ebony top justice)

I'm not in a regular band these days but I still have 9 bass instruments, one of which I might sell. I do however play regularly at the local Jams. and am available to dep for one local band.

[quote name='fryer' post='1126359' date='Feb 13 2011, 08:09 PM']You say that ' The problem has nothing to do with maximum power handling capability '. But why not, 'cos if I put 700 watts out of the Firebass, surely the Epi would handle this, but the Peavey wouldn't ?? Sorry but I don't see why it isn't a problem.[/quote] What Alex said plus You are very unlikely, unless you are playing Wembley, to ever run the whole rig flat out and be able to stand in front of it.

[quote name='icastle' post='1126022' date='Feb 13 2011, 03:10 PM']It's not line level. EDIT: 'Low Output' in this case is related to the inbuilt crossover, not signal levels.[/quote] Read the spec and look at the block diagram. The High and Low Outputs from the crossover are 0dBV, which is line level. The only speaker outputs are the two jacks on the back panel marked "Outputs Speaker Jack Parallelled".

[quote name='icastle' post='1125868' date='Feb 13 2011, 12:35 PM']Forget trying to find 450W resistors and putting signals 'back into the power amp section' and so forth, this is just a rather unclear user manual. All you need to do is take a speaker lead from the Low Output socket, feed that into one cab and then daisy chain from that cab to the next one. Doesn't matter which way round you put them - one way round will sound different to the other, just pick the sound you prefer. On the front of the amp you have 'FREQ' and 'BALANCE' controls. Stick the 'FREQ' control to about halfway as a starting off point (you can tweak that later if you don't like the sound). Stick the 'BALANCE' control all the way round to the LF end.[/quote] Why would you want to send line-level to a speaker cabinet? It'll be very quiet. As for the original post I would imagine that the single Epi 4x10 will more than loud enough on its own. The problem has nothing to do with maximum power handling capability, it will be if the 2 cabs have different sensitivities i.e. dBs per watt. If it's all about image then stand the Epi on the top of the Peavey but don't connect it. By using two unmatched cabs on the single amp there will be no way to balance the perceived sound level. If you are intent on using these two very different cabs then you need a head with two separately adjustable power amp stages, or a rack pre-amp and stereo power amp or just get a separate power amp to drive the second cabinet and hang it onto the Firebass.

All this talk of preEBs has made me get mine out and play it. Mmmmm nice. I know what I'm taking to the Jam on Monday.

When I had a BBE BMAX-T pre-amp I changed to a 5751 in order to try and reduce the gain problems that I was having with active basses. Eventually the factory brought out a mod but I kept the 5751 as it sounded so much better than the supplied 12AX7. I then acquired an Alembic F1X and very swiftly swapped out the origninal valve for a 5751, and that was how it stayed through many gigs until I sold it. It was very deep and smooth. I also tried a pair of 5751s in an Orange Terror Bass but it didn't make so much difference, so I kept the valves and sold the amp. One day I'll try them in the AD200B and see what happens. They are currently installed in Electro Harmonix English Muffn which has a revoiced EQ. Although the 5751s have more gain than the stock 12AY7s I think it sounds better. I have some future valve projects and the 5751s will definitely figure in those.

I suppose I should post this here now it's all finished.

Yup. Had a Retro in a DJ4 and a DJ5. Exxxxxxcellent.

[quote name='gary mac' post='1112523' date='Feb 2 2011, 03:15 PM']Nice bass OBBM, that's a beaut. Looks very classy. What works have you done to it? Hope that's not a stupid question, but I'm not very up on Laklands. Love the look of it though.[/quote] Thanks. It started life as a simple Duck Dunn (P body, J-neck) with white pickguard. J bridge pick-up routing done by the Gallery Lindy Fralin split-coil J pick-up to match the Fralin P obtained from USA Stack-knob CTS pots modified. Hipshot D-Tuner Black pick-guard

Lakland Duck Dunn - modifications complete

Thanks to Rasta I have finally finished the transformation of my Duck Dunn.

Can I suggest an Epifani UL310. Great speaker cab.

+1 on Lindy Fralins.