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Everything posted by stevie
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Nice work! That Beyma driver is a classic and works well in that box. I agree about getting straight, square cuts - it's so important but not easy. If you're short of clamps, you can always use panel pins or self-drilling screws - remove and fill the the holes once the glue has dried.
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The bass needs to be more forward. The whole thing sounds like it's in mono. Otherwise, it sounds pretty good to me. I'm no expert though.
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I'd be very careful with this if I were you, @B.Flat. There's a very good chance that the lowpass circuit Bill has suggested will drop the impedance of your speaker to 2.5 ohms. Your Yamaha is 2-ohm stable - so you should be all right. However, you should be aware that the circuit will probably also induce a nasty peak at 2kHz, which won't be very nice. Just sayin'.
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The cheaper cabs in this list, @stewblack (the first four) all have ceramic magnet drivers. Barefaced also use ceramic magnets. The more expensive ones are fitted with neo drivers, which is what you'd expect. Those Harley Bentons are ridiculously cheap. As a DIY'er, it would be difficult to build a poplar ply cab for those prices - never mind buying the drivers.
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The Big Fat South-West Bass Bash - Now Sunday 19th September 2021
stevie replied to scrumpymike's topic in Events
I can't imagine that there is a more friendly, better organised bass bash than this. I'll be there! -
It looks like an interesting project. However, if you want to by bypass the passive crossover in the BC12 cab you'll need to be able to programme the crossover and DSP. I've no idea if that's possible. Simply bypassing the passive crossover with the Mackie one will not work properly and will definately sound worse (as Chienmortbb has already said). To adjust the active crossover, you'll have to time align the drivers by delaying the woofer. Then set the crossover (24dB L/R) to 2kHz and use the parametric function to equalise the response of the CD horn. If you're going to use the separate 50W amp for the HF, you'd need to adjust the sensitivity to compensate for the higher sensitivity of the HF driver. Even if you can do all this, chances are that the passive crossover will sound better anyway. So I'd agree that connecting a full range signal to the regular input on your cab is probably the best solution. Should be good.
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Graham bought a cab from me and drove all the way from Kent to collect it. It was nice to have a chat about basses. Lovely chap and a delight to deal with.
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Mark bought a cab from me. He was a delight to deal with and is a credit to Basschat.
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Bass Guitar Magazine - SOLD!
stevie replied to Mickeyboro's topic in Accessories & Other Musically Related Items For Sale
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There's a lesson in there somewhere.
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- shenzhen grand technology co.
- chinese
- (and 5 more)
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Harley Bentons new bass range! Heads, combos and cabs!
stevie replied to maidens97's topic in Amps and Cabs
Agreed. I looked at the 15" cab and the porting is the first thing I noticed. I don't think you can manufacture for those prices without cutting corners. I would imagine that being outside a customs union would make returning a faulty product quite complicated. -
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This is very probably the best 15" bass guitar driver on the market at the moment. 500W continuous power handling, long coil, triple demodulating rings, very low distortion and a killer sound. It works in a relatively small cabinet right up to about 90 litres internal volume. This one's 4 ohms. Weighs only 3.5kg. https://www.lean-business.co.uk/eshop/bms-15n620-15”-500-watt-neodymium-low-midrange-speaker-3-vc-98-db-8-ohm-p-2572.html?zenid=s6s9v6eis558l9kflc7tjf4fe7 I've photographed it in the Eden cabinet that I've used with it, which is also for sale. It's a lightweight construction (but not as light as poplar), braced and damped, and has a compartment for a 6" midrange driver, which I'll blank off leaving you with the option of fitting a midrange driver if you want to. If you'd like to see some photos of the driver on its own, please ask. I'd like £100 for the BMS and £25 for the Eden cab. Carriage at cost.
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I have two Eminence Kappalite drivers for sale. These are OEM models with no vendor’s name but the eagle-eyed amongst you will recognise them straight away. They have the same Eminence cone number as the Barefaced 12 driver (and the Mesa Boogie Subway 12 surprisingly). One has been used for testing and the other is unused. I have the T/S parameters if you’d like them. I’m happy to sell them individually. If you’d like me to install one of them in a cab, I still have the 12” cab used for the development of the Basschat 12” system. It’s lightweight, 15mm poplar ply, properly braced and damped and fitted with two Speakons, a quality handle and an Ashdown grille. £100 each for the drivers, please, and £50 for the cab (which just about covers the cost of the wood). Carriage at cost.
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I have two Eminence Kappalite 3012LF drivers for sale. They have had a small amount of use but only for testing. These currently sell for £200 each new and are hardly ever seen on the used market. They're used in a number of high-end bass cabs, particularly the Fearful/Fearless range and cabs from Quilter and other boutique makers. I’d like £100 for each one, please. I’m happy to sell them individually, but only if there are two buyers. (As you know, drivers are easier to sell in pairs). Delivery at cost or collect if you like from Dorchester in Dorset. Here’s the manufacturer’s link: https://www.eminence.com/speakers/speaker-detail/?model=Kappalite_3012LF
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It was used because it was well recorded. IGY in particular was a favourite of hi-fi shops because it made the gear sound good. Hell Freezes Over was another hi-fi shop favourite a decade later.
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I've found Madonna's Greatest Hits useful. It takes a well balanced system to get the voice right and you should be able to differentiate clearly between the different bass instruments used on the different tracks.
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Much as I enjoy my Ashdown RM500, the compressor isn't in the same class as the optical compressor I used to have. I sold it because the Ashdown had a built-in compressor, but I'll be getting another when the time is right. It would be interesting to know which head manufacturer fits a genuinely high quality compressor to their product.
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Or get a 300W amp that has a properly designed fan cooling system.☺️
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WinISD results suspect - can I have a second opinion please
stevie replied to Mottlefeeder's topic in Repairs and Technical
Two things on the vent. Thin ports are generally bad for turbulence. If you can't use a round port, try increasing the height of the port from 25mm. Say, 90 x 50mm. The 70Hz tuning frequency concerns me a bit. I'd ideally like to see it at 60Hz (or lower), as a low-E 42Hz signal could overwhelm the drivers. This is the big problem with porting small, high power cabs. The length of port you've specified is more or less ideal for the internal depth you're working with. My home-use-practice cab is a similar size to this and it has a 50mm vent. At home practice levels, it's not a problem. What I'd tentatively suggest is that you build as-is, then reduce the width of the vent by adding pieces of wood to it to lower the tuning frequency. Then see what it sounds like. As I'm sure you know, a lower tuning frequency will improve power handling at low frequencies but the smaller vent will make chuffing worse. This way, you get to choose which you prefer based on the volume levels you intend to play at.