funkydoug

great to see Tech21 on BC It doesn't seem to be available here yet ... any idea when it'll arrive on these shores?

thanks @JohnDaBass , it is ordered!

Just noticed it this afternoon, very cool: https://www.tech21nyc.com/products/flyrig/bass-fly-rig-v2/

hi, a while back I put a Groove Tubes valve / tube in my ABM head and it is brilliant. Clean glassy tubeness without much breakup. If I want to go the other way and get a really thick dirt sound, can anyone recommend a tube? Cheers, Doug

Moving at a snail's pace here... This 10cm port seems to be ideal: https://www.bluearan.co.uk/index.php?id=MON126660&browsemode=category Only issue is it needs a 103mm cut-out. My hole saw has a 100mm 'blade' but don't think i'd want to try to squeeze the tube in there. Is there a 103mm hole-saw anyone recommends for it?

It works as an 'event' - like the long jump. You've set a record of 7hrs until we get a longer one!

Some serious staying power! Nice to see some extreme endurance champions to counterbalance this morning's sprint

Hi folks, A bit of pure basschat geekery here. Look away if you're expecting anything useful or even musical... Think @warwickhunt and I may have set a record for the fastest sale. From me posting the advert to the item arriving in his hand it took 32 mins according to the forum clock. It was a totally genuine sale with no prior contact or other shenanigans. I confess to getting a kick out of it ...and was relieved that there were no speed cameras on the way 🤣 Happy to take a drug test if the moderators insist 🤣... can anyone beat our time, or claim another Olympian feat?

Hi Phil, just a quick one to say thanks for the message above. I'm still in the planning rather than doing phase - this thread has been extremely helpful.

Hi Phil - any chance you could enlighten me on how you achieved this flat response down to about 55-60hz? And are these charts taking Xmax limitation into account? Thanks again, Doug.

That's my conclusion too. The power and eq flexibility in the amps mean that we don't notice until we open them up!

AFAIK it is the original driver and the piezo was also factory fitted. I studied the few photos of them online and came to the conclusion that despite Ashdown's blurb, this one never had a port or a posh tweeter. I also noted the deliberately ambiguous product description you spotted Stevie. Not the first time I've come across Ashdown being inaccurate when it comes to providing details of different amps / cabs across a given range. I'll let them off, the amps are great. Ok, I've got a few really good options here for adding a port which I'll think more about. I'm leaning towards a large rear facing port, as it'd avoid cutting more out of the baffle to the point where it starts to lose stiffness. Once I've got the design right I'll just need to avoid making a mess of the tolex. The piezo has a 77mm cutout. I'd need to find a same size upgrade I reckon, as expanding that cutout would be difficult (for me!). Off to re-read the easy build 10 thread ...

If the drivers are identical in the both cabs, do they also need to tuned identically?

This is looking like a great idea. Will very closely re-read the thread. Thanks

Morning all, Really appreciate your engagement and the time you've given. I measured the cab and the internal volume of the box is 42.3 litres. I'll need to deduct the driver itself from that but there are no handles or braces (unfortunately!) to deduct. I'll revisit the modelling given what's been said. Is there an alternative to WinISD that is less 'buggy'? One other consideration I have is that the cab/combo needs to be able to play nicely with an extension cab. The extension cab will be a vented 210. Do I need to tune this box the same as that one to avoid wierdness?? Maybe that's one reason to keep it sealed, so that it doesn't mess with what's happening with a vented extension? I'm open to all options, all speaker upgrades and even keeping it sealed and for now will keep experimenting in the modelling realm when I can. As I said in the OP, this is as much about learning as it is about the result, so although some might think I'm over thinking it, that's kind of the point! I clearly don't understand this stuff very well yet, but that's why I'm asking. That said, it's a busy family bank holiday weekend with young kids, so there's not a lot of scope for geekery today!

Totally unlined. Yep I'll add some. Did that to one of my other Ashdowns lately, easy job and quite satisfying. That one sounds great now. I put a new crossover in it and lined it, having learned a lot from you and a few others here. This one remains in factory condition and while the amp is great and the combo is ideal in lots of ways there are a few modifications in mind: lining it, maybe bracing it and working out what to do about the low end, hence this thread. I'll measure properly this weekend and report back. 👍