Mediocre Polymath
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Mediocre Polymath's Achievements
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I suspect it was a combination of slightly iffy port tuning and the driver being potentially a bit of a wrongun. Like I said, I'm not particularly bothered – the 6FE200 works and while I'm not a independently wealthy gentleman of leisure I can eat the cost of a busted speaker without feeling bad.
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Slightly bigger box on my build, volume of about 13.5 litres, but it looks like it would work reasonably well with the 10 litre box with a ~8 cm long port tube, you'd just lose a bit of oomph from the low end. That said, I'm not anything like an expert on this sort of thing, so if you're considering making your own I'd suggest that you wait for Phil to get time to have a proper think.
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So the 6FE200 arrived today (along with the handle that I'd forgotten to get). I recut the tuning port and wired it all up. It sounds much better than the 6FE100, and is noticeably much louder for the same power. I think that might be a consequence of tweaking the port tuning. I had the gain on the markbass at noon, and all eq knobs flat. Got it up to about 12 o'clock on the master volume before my ears started to hurt. Speaker seemed fine, if a little farty in the low end, distorting a little, but not in an unmusical way. The speaker excursion wasn't visible to the naked eye at that volume. With the low end boosted (destruction testing, I suppose) and the low pass filter turned up it did a great impression of the "Ampeg fliptop running flat out" sound you get on Otis Redding live recordings.
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Ah, that's reassuring. From a more detailed look at the many variables (you spurred me to actually figure out more than the tiny fraction of WinISD's functionality I'd been using up to now) it looks like the Faital 6FE200 might work well. Requires a slightly bigger box, and its higher frequency drop off is more pronounced, but it otherwise looks to be reasonably solid. I'm making this cab for someone who uses an 1970s EB3 though, so high frequency response isn't particularly important for my purposes.
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Yeah, I think I probably over-reached with what I could reasonably get out of a 6-inch speaker. Interesting learning experience though, and it wasn't particularly expensive to learn. I'm mostly just pleased with how the cab itself has turned out. It was more a sewing exercise than a can building one. The speaker/wiring is the most straightforward part of the process. Look! built in cable pockets!
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I'm inclined to assume it was something I did, I've never had problems with Faital drivers in the past. Might try again with the 6FE200 and a port tuned to about 80hz.
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Mediocre Polymath started following Vigier Excess 9v Preamp - Original? , House Jam Micro Cab , House jam-inspired backpack-sized 1x6" cabinet experiment and 3 others
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So I've been tinkering away on a mini speaker project very similar to this one, something small enough that my dad could easily take it to open mics and house jam things. It was going to be a christmas present, hence me working on it today. Like CBD, my attempts to model a flat response curve with the Fane speaker were a bust – I'm guessing they've changed the specs since the original House Jam cabs were made. No matter how I played around with cabinet volume and port tuning, it always had a pronounced 4–5-dB spike around the tuning port frequency and then a drop in efficiency between 100–160 hz. WinISD twiddling suggested I'd have better results with a Faital 6FE100 and a slightly larger cab (about 13.5 litres) tuned to about 65 hz, so I went with that. I built the cab and finally wired it up this morning and while it sounded good for about two minutes, it quickly started distorting, then crackling, then cut out entirely. I was only driving it with a MarkBass 250-watt amp, running at 8 ohms and about 1/4 volume, but yeah, it dead. Any idea where I blundered here? Was my port tuning too low?
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House jam-inspired backpack-sized 1x6" cabinet experiment
Mediocre Polymath replied to cbd's topic in Build Diaries
Sorry. Wrong thread. -
I mostly play a fretless bass (headless even, for double points) and have very long hair, but yeah, no ponytail. In my experience the ponytail is the preserve of the heavy metal dudes and theatre technicians. I generally wind my hair up in a bun when I'm soldering or using power tools. Less flappy.
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I recently disassembled and reconditioned the original 3P4T rotary switch in a 1973 EB-3, and I can confirm that those old components can be taken apart relatively easily so long as you have the right tools (surgical hemostats are the answer to many things). However, I only did this because the switch is an unusual type and comparable modern replacements don't really exist (just cheap sealed plastic ones that in my experience break within a few weeks). I wouldn't bother with bog standard components like pots.
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Ooh, that's a nice thing. How's the stringing/tuning process? The major downside I'm seeing is that every time you played a gig with one of these, you'd have a bunch of curious nerds down at the front trying to figure out how it works. EDIT: I've also just noticed that there's a routed-in plug of wood under the bridge – did you have difficulty routing the (square?) through holes for the mechanism, or is that just an in-fill for the bridge that was there before
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I'm very tempted to have a look at tickets, even though I generally hate big shows with a passion. Showing my age (or perhaps lack thereof) but Travelling Without Moving was the first album I ever bought. I didn't play bass back then, and had no real interest in learning, but I remember being obsessed with the interplay between Stuart Zender and Derrick McKenzie on tracks like "Funktion". I recently stumbled across this fantastic recording, which caused me to totally reassess Jay Kay's role in the band. I'd always assumed that he was the lyricist and the charismatic man-up-front, but not particularly involved in the instrumental side of things. This loose rehearsal jam really shows him in band-leader mode, conducting what sounds like just the core group of McKenzie, Zender and Smith through a song that's already clearly fully formed in his head.
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Vigier Excess 9v Preamp - Original?
Mediocre Polymath replied to fergs40's topic in Repairs and Technical
It's a lovely preamp. It's not totally uncoloured, but I'm not sure if that's even a thing really. With everything left flat it subtly changes the sound compared to passive in a way I can only describe as "better". I'm currently playing my NTBT-equipped bass while half paying attention to a work teams meeting. -
Vigier Excess 9v Preamp - Original?
Mediocre Polymath replied to fergs40's topic in Repairs and Technical
Here's a pic of my bass's Bartolini gubbins from when I was transferring it all to a new body. The layout of the module is slightly different but the general look is the same, as is the colour coding on the wires. This particular module is more than 20 years old now (yikes) and I don't think they make it anymore, so visual differences wouldn't but surprising. -
Vigier Excess 9v Preamp - Original?
Mediocre Polymath replied to fergs40's topic in Repairs and Technical
I know nothing of Vigiers, but that module looks a lot like the Bartolini NTBT I have installed in one of my basses. Does it have any writing on the sides? The trim pot on my preamp is the overall output trimmer.