Chienmortbb

Stevie is right, the driver only arrived last week and we have yet to get the driver and cabinet together. For me there are two goals, two must into my car boot and they must be as light as possible. Of course having said that I realise that I need to measure my boot. I have just gone from a Freelander to a littl Suzuki and space is tight. As Stevie says the revised driver still works well in the original design and if you need one soon, build that one. I suspect it will be some time before any revisions are done to the design, if there are any. Finally thanks to Stevie and Phil. They have so much knowledge and they give us so much of their time.

Nice Charlie. I think you are OK with Basschat's rules as you are not making any money from it.

[quote name='Dan Dare' timestamp='1478174679' post='3167255'] Nice, but the Magellan has the influence of the main ex-Genz engineer and is £400 cheaper... [/quote]That is much nicer looking than the D800 and if you buy an HPF for about £100 you are sorted.

I have just bought one of the new spec SM212 speakers. Phil has. Modelled a good response in a 30 litre box and also that is works well in a sealed box. I confirmed the results of Phil's modelling and have briefly tried out sealed and mis-tuned cabinets. The mistimed cab had a 4db peak at 120Hz and sounded surprisingly good. The sealed cab was good too but I missed the syrupy sound of the ported cab. It is too early to be sure but it looks like a tiny cab can be produced with this driver. My table saw and jigsaw are at my daughter's house at the moment so I cannot build trial cabs at the moment. However if Stevie reads this, you can have the driver for 10-14 days for testing if you would like. PM me!

And it has the most important control of all, a High Pass Filter

[quote name='tauzero' timestamp='1477920614' post='3165247'] Like me, you are obviously not a good bass player. [/quote]In the "other forum" there is Mediocre bassist club. Are we in danger of forming one here? Sadly I think I would be eligible for membership.

[quote name='mcnach' timestamp='1477992955' post='3165725'] 22lbs = 10Kg. [/quote]My point is that lbs are only used by Americans and proud parents in the UK. I apologise for being a pedant.

[quote name='Kevin Dean' timestamp='1475658891' post='3147652'] Weight is 22lbs [/quote]No it is 10Kg

[quote name='MarkG3' timestamp='1477840075' post='3164751'] Looks like that is what I need but I have no idea how to fit one lol I'll try to do a mic'd recording, I can't really crank it at home but I'll see what I can do. How would I then share it here? I played more with them this morning and do sound good. Seems to have a ton of low end which is nice, even with the bass and low mids backed off to 10o clock there's still lots [/quote]Firstly I looked at the 2x10s and they seem enormous. Your 15s lookl just the job. Secondly, where re you in Bucks? i am sometimes in the Slough/Beacosfield area and if you are close I would happily fit tweeter switches for you.

[quote name='NancyJohnson' timestamp='1477480721' post='3162473'] Sorry about weighing in late here. My signal path is (in the main) a Sansamp RBI into a stereo 2U Matrix GT1000. I've been playing for years and years and bar none this is the best poweramp I've ever used. It's loud, transparent, lightweight and runs very cool with little or no fan noise. It comfortably fits into a shallow Gator rack. I spoke to the Matrix guys and they said the 1U version is a bit noisier, but performance is similar. Take a bit of advice from an old soldier; spend a little more and buy a 2U Matrix. It's a wonderful bit of kit. [/quote][i] looked at at Matrix when I\ considered going rack mounted. The designs are target at modelling preamps. They are almost unique in that the use a SMPS power supply and a mosfet Class AB output power amp. The other amps mentioned are fine amplifiers but the Matrix power amps are designed for MI use.[/i]

A vactrol is an opto coupler. It does have better than a home made one though. Many prefer a good VCA ( voltage controlled amplifier ) design and several good designs are available from THAT electronics.

[quote name='itsmedunc' timestamp='1464086603' post='3056387'] Westone Thunder 3. Had a few since but they weren't the same. Have a Thunder 2 MK2 now, which is exactly the same as a 3. Although, it's a great bass it still wanes in comparison. [/quote]Mine was a Thunder 1A. Heavy as hell and I probably could not play it now but I loved that bass. Had a one out, one in, policy from SWMBO at the time so.....

[quote name='Dan Dare' timestamp='1474019918' post='3134958'] A guitar playing pal of mine had a harness made, that sits on both shoulders and spreads the weight. He swears by it. They are available commercially, for example, [url="http://www.slingerstraps.com/harness-strap-guitar-strap.html."]http://www.slingerst...tar-strap.html.[/url] There's a Planet Waves version that's available in this country. May be worth a try. [/quote]I tried the Planet waves one but it seemed to put the bass on your hip not on your gut, meaning I was turning around to play. More stress on the back Sold it after 2 weeks. However I had a light weight soft leather (Rotosound) strap on my acoustic and I tried it on my bass. So much more comfortable that the Levys stop I had been using. I'm now considering ordering some leather and making a wider version.

There is an XLR jack combo that used the standard D size cut out. I also have a Q max cutter if anyone needs help.

As a moderator you are entitled to your opinion like anyone else but should not make unsubstantiated claims. ICEPower amps are designed for many purposes and the ICE part refers to the cool running not In Car Entertainment. There are many great Class D power sections out there from Companies such as Hypex, Pascal, Powersoft, Abletec and yes ICEPower. Of course it won't make it any better but you could put an output transformer on one of those to get the weight and Heft if you want. The SWR, Ampeg, Mesa heavy amps sound great because there are well designed not because they have a big old transformer at both ends. The TH500, in my opinion, is not well designed and it uses an underpowered module and poor heat management. If there is such a thing as heft, Aquiler have designed it out of the Tonehammer amps. Yes I am tetchy, I have the flu!

I agree with Phil. The best purchase you can buy is a High Pass Filter( Thumpinator or similar) if your amp does not have one. There is nothing useful below 30Hz and little below 60Hz. Stay away from Sub bass exiters and octavers. They destroy time and speakers!

[quote name='pete.young' timestamp='1477044139' post='3159410'] I understand this: I have an honours degree in mechanical engineering and was a member of I.Mech.E, before jobs in manufacturing industry disappeared during the Thatcher years and I retrained as a computer scientist. Galling it may be, but that's still not the way it works in practice, 30 years later. It depends. The pinnacle of sound recording courses in the UK is widely acknowledged to be the Tonmeister course at the University of Surrey. The entry requirements are maths and physics at A level and the syllabus includes a lot of moderately difficult audio engineering maths. People graduate with a B.Mus from the Faculty of Music. Not that you will find too many Tonmeisters mixing the house PA down at the Dog and Duck. If your point is that one can't be an engineer unless one has a B.Sc. I disagree. Cambridge has a fine engineering department and doesn't award any science degrees. [/quote]Oxford award BAs in Science, I suspect Cambridge do the same.

[quote name='LayDownThaFunk' timestamp='1476647070' post='3155987'] Spot on. [/quote]Could you explain why your comment seemed more relevant to what Donald Trump has between his ears, than a sensible discussion on bass electronics?

If my previous post seems pedantic, it comes from 10 years plus hard graft, to achieve a coveted professional status. Sadly I could not even claim technician status on bass.

[quote name='pete.young' timestamp='1476782071' post='3157109'] In the UK, this is wishful thinking, usually on the part of people with engineering degrees. In other parts of Europe maybe, but here an engineer is someone w. ho fixes washing machines. The term [i]Engineering[/i] is derived from the Latin ingenium, meaning "cleverness" and ingeniare, meaning "to contrive, devise". [/quote] The person that fixes things is a technician and the one that designs it is an engineer. In the U.K. there are Chartered Engineers (CEng), and Incorporated Engineers (IEng). The IEng was formerly an Engineering Technologist, a term still used in some countries. Tbe person that mixes live sound would surely go through the arts route at college/uni finally achieving a BA. rather than a BSc. So not an Engineer. John Anderson former IEng.

Defiinately in Eb and the story I heard us that it was played partly on a bass and part on a synth, which is why it is a bit odd to play.

[quote name='Woodinblack' timestamp='1476630261' post='3155768'] No it isn't, the whole point of an active bass is to provide a buffered low impedance output to the bass so that the capacitance of the lead doesn't cause high frequency attenuation in the cable. Having active tone is just a by product of it being powered [/quote]Spot on.

Most people use the terms active and powered to mean the same thing. Stevie is adding electronic crossover to the mix. I am not going to open that can of worms but if you use an active crossover you need an amp per driver. Whereas if you use a single amp and passive crossover it can be cheaper. In reality a good active crossover (linkwitz-Riley) with suitable amps and speakers will outperfirm a passive crossover system using the same drivers/speakers. The original Grrenboy fearLess 12/6 was designed for bi-ampimg ( another name for active crossover). Even the "low cost " passive crossovers for Grrenboy designs are expensive but usually lower cost than an active/bi-amped system. Active/ Bi-amped is best but a good passive crossover bests a " cheap and nasty" active system.

Guy should there is nothing wrong with ICEPower modules except when manufacturers "overstate" the spec. For example GK quite 200W for the MB150. ICEPower quote 170 at 1% distortion into 4R.As the combo used a 4R speaker 170W is reasonable. Others use the same module and quote 200W. As a 100W amp it is great, ca It 200W and it sucks. It outputs 100W into 8R with 1% distortion. That is the ICEPower spec.

The best allround driver as determined by the 1x12 Cab Design diary, is the Beyma SM212. However, I am not sure anyone would now need a 4x12. I suggest you try a 2x12 initially. According to Phil Starr, the new iteration of the SM212 looks good for a sealed cab (if you are happy with the reduced ultra low end response). You are looking at an internal volume of 60 litres or even smaller. Although if you go smaller you might not fit the speakers in. If you tell us exactly what you want, someone, maybe me, can give you even more exact advice.