Bassman Rich

I had to change the output jack, thought I'd share these pictures of how it's aging. I think it's a 1983/4, s/n is an E31****

Thanks for that Phil, sadly, I don't have any focusrite type interface, but after retiring from being an electronic engineer for nearly 40 years, and having my kit provided, I have bought myself a Fluke 75, the Fender USA P bass of test meters.

Quick update. Thanks to the brilliant guys at Ashdown, I had a long chat about this with their chief designer, Dave Green. He has been trying to do this for quite some time too. Got some experiments to do with a bit of cardboard tube, so it just might work. BTW the speakers are not the Sica/Jensen ones we thought they were, and the parameters are not accurately known.

This pickup looks great. I have a Pink Paisley jap reissue tele bass, and the neck is as good as any of my 3 USA P basses. However, the stock pickup, plus the Seymore Duncan 1/4 pounder is not great, the pole pieces are such that the highest one ( one in from the left on your photo) is under the A string, so the D string is unusually quiet compared to the other 3. Think I need to get in touch with bare knuckle.

I cannot emphasise enough how much I appreciate all this effort you guys, Phil and Bill especially, have put into this quest of mine, but thanks again. As I have 3 other gigable cabs, I think I'm going to do the 'tuba tube port' experiment, will order a port today (blue aran do them cheap as chips) , try it out, and post the results. Can I post a video with sound on here, just so you can all giggle at my playing, and the tuba sounds ?? !! When all said and done, if I blow the speakers, I can then hunt for some new ones that will match my big deep bass trouser flappy desires in a shallow box that fits the boot of the car dreams !!

Oh yes, I love this too, I am the new Herbie Flowers, two instruments for the price of one session guy, available for rent, cheap prices, easy action baby....

But, just in case I get the fiddle about itch, what length single tube at 75 mm would I use, to possibly get sonic booms?? It sounded OK ish, but uneven, when trying it with no port attached, just the hole, but could just be my ears playing tricks, hearing what they want to hear...

Ps all, I did enjoy watching this guy, tuning his cab with rice, sounds like fun !!

My other half often complains about my rear port velocity, and sonic booms, better not upset the apple cart any more 😉

Great stuff Bill, however disappointing. Thanks so much to you and @Phil Starr, you guys really know your stuff. I guess thats why my ABM 1 x 15 speaker has two 75mm ports on the back.

The magnet is not quite the same size as on your Jenson spec sheet, about 130mm full width ot the outside of the magnet, as far as I can measure with a ruler..

Hey, fantastic response, they look almost the same.

Ooh thanks ever so much. I don't really want to hack the cab about, so can't really increase the port diameter from 7.5cm. I don't suppose you could advise on port length for that diameter could you?? Pics of cab added. Ps The upstairs loo has stopped flushing, and the bedroom TV broke on Monday (after absolutely years of service, it's a 23" one) new one arrives this afternoon, so might not get to experiment with cardboard tubes for a day or two....