SamIAm

PM'd

-ve ... no! It is from such input that we can work to improve things S'manth x

I've recently relieved @MungoBass of a PJB C4. Delivery was lightning fast and the cab was nicely packed. I was anxious about some chuffing I heard, but the lovely @Chimike welcomed me to his bass paridise and easily sorted it; David was super supportive, offering to accept it back or cover repair costs, Mike took no payment for the time nor the 6 screws that solved it all <hugs>. I had read the feedback for @MungoBass when buying the cab from him and my experience has shown they are, well, not glowing enough to reflect what a star BCer he is! A S'manth rating of 12/10 without question! I can say that you can buy/sell in total confidence and that he is the best of the best. S'manth x

I assume with a 20x40 extrusion one would not have to worry about a truss rod? S'manth x

Did you ever resolve the high noise floor/hiss? S'manth x

Neck looks printed, I see artifacts. S'manth x

Interesting approach of using an aluminium backbone ... hmmmm. S'manth x

Short scale? S'manth x

So ... The lovely @Chimike welcomed me to his Aladin's cave of most things bass yesterday and kindly shared his skill in trying to resolve the issue. After a listen, he described the sound as 'chuffing' rather than a rattle. Dissapeared into the treasure trove and when he emerged he popped 6 screws into the holes in the C4's back panel (Where the skids had lived). No more chuffing! Playing my bass/head, my bass his head, his bass his head ... all sounded OK, tho there was some power tool noise from adjacent workshops and we were outdoors (To avoid any resonance from all the gear he has ... it seemed to go on for miles, but in reality was probably just kilometers) so hard to guage, but a good sign. I arrived home to late yesterday too try it out, but late afternoon when I got home from work I hastened to get my rig setup ... and it sounds fab! A very happy camper! Thank you all for your suggestions. By the way, the seller (Top man and why BC is THE place to buy) totally lived up to his glowing feedback, despite not having experienced the chuffing himself he had offered to either refund me or cover the cost repair. @Chimike refused to let me pay for the screws (Or his expertise). I'm delighted that neither were required. I've fallen in love with the my dimunitive C4 and, whilst it is heavier than I had aimed for in a cab, a hand cart will easily sort that! S'manth x

On a more detailed note ... with (I imagine?) a light body, is neck dive an issue? S'manth x

Thank you kind sir! Gang of Four, Booch ... teeth cut on OOP (I even worked for a short time with Richard Helm in Auckland!) I suspect (STRONGLY!) that finding a suitable neck will be the biggest obstacle! (Build one S'manth ... shudder!) S'manth x

Awesome Rob! It is inspiring me to try similar (But a 5 string short scale headless). Woodworking ... daunts me, but Fusion 360 and 3D printing do not! I might have to steal reuse some of your design concepts S'manth x

Ta muchly! I'm also in the process (amongst far too many other things when I should actually be practicing bass playing!) of making my own pedalboard; 3D printed ... I've done it before (But it melted away in my fire) and like the built in handle of yours ... might have to incorporate something like it S'manth x

Cool! What is it sitting on? S'manth x

Hey kiwi dude (Having emigrated to NZ in the 90s I own this) I ain't no model ... tho I do try modelling in my FX rig! S'manth x

I'll check it out Ooooo ... defo a contender! After reading some posts by those who know more than I do, some heads (especially wee ones like gnome/elf /bam... tho these don't have fx circuit) seem to have a lower response from low notes ... the C4 I'm hoping to pair with claims 30H/z low . S'manth x

Sadness that the years/life can afflict us so! A back injury (Which ended my bedside nursing career) and pain in my fretting hand when playing a normal bass has meant that I now Play sub-short scale, which helps with both issues as they are short and light. Cannot stand for any length of time ... playing on a stool is still OK tho? S'manth x

My bass playing has to date been mostly using battery powered combos. My first was a Roland Micro Cube Bass RX and I loved it, but not a lightweight! I replaced it with a Boss Dual Cube Bass LX which suited my needs ... battery powered, under 6kg and appropriate volume for my playing. At the recent most excellent SE Bass Bash I realised I wanted ... more! Hearing the thunderous tones from the various setups that other BCers brought along kicked off a quest and my need for a mainless system has passed. I've a cab (PJB C4) that can handle 400W and I now need an amp head to match. I'd love to hear your suggestions for a head, I'm looking for one that: Is lightweight (<2Kg). Can drive 250-400W into 8 Ohms. Able to cope with low B (5 strings are my delight). Does not have a noisy fan. Has an FX send/return. Affordable! For me this is roughly £400 or less ... used from a BC member would work. The last item is because I use a multi F/X unit and would like to be able to send its signal (Replete with all the various fx including amp emulator) into the power amp section of the head. Thanks in advance S'manth x

Oh wow ... such great stories to be found here! I'm a relative toddler ... from a bass playing perspective 🤣 After years of trying to learn to play the acoustic guitar, I was successful learning the sax ... sadly some nerve damage ended that as I can no longer hold embrochure for more than a minute or two About 12 years ago I picked up my first ukulele at a friends BBQ and fell in love! When I moved down to Brighton area a few years later I joined a ukulele band and about 2016 fancied a change, so put down my tenor uke, picked up a bass uke and fell in love all over again; by the time we reconviened after covid, I'd started playing a sub short scale bass guitar (Intonation adjustment being much better) and ... that was it for me! Still playing sub-short scale bass and bass uke (My old fingers struggle with the fret span of long scale and my injured back likes their light weight). S'manth x

Thanks everyone for your suggestions! So this afternoon was another test to try to find the source of the sound ... all fired up and recording (Tho the wretched SD card won't appear on my laptop!) and try some of the suggestions. Sound still there with the cab on its side or upside down. Face down sound still there, but applying some pressure with my foot to the middle of the back panel and the sound reduced, perhaps even went when I weighed it down ... hmmm, this tends to steer my thinking away from an amp problem. I need to try the amp with headphones but I can't find the jack plug converter thingie, oh the joys of moving! OMG ... NO!!! The only bit on the back that slightly hints at being removable might be the panel with the speakon connectors on it (YELLOW ARROW) ... but this is 'above my pay grade'! And when one looks at their construction technique, there is nothing that makes me think removing anything more is even possible, they seem built like the proverbial brick out-house! The RED ARROW is pointing to one of the six holes left by the removal of the two rear skids (As was shown in the BC listing) and I discovered that, with low notes, if I put the back of my hand near any of these holes I can feel air puffing out; Might this be related to the sound. I could try covering them, but don't want to leave any sticky residue from gaffer tape which is the only thing I can think of that might be strong enough. Once I've been able to read the recordings off the SD card, I'm going to send off an email to PJB and seek their insight; also planning to see if GAK have a C4 in the shop I can try (They do sell them) and see how it sounds. I can get low notes without the sound when the amp master is set to 9 O'clock, but at that level the sound output is lower than I achieve comfortably with my Dual Cube Bass LX which is only 10 W (5 W+5 W), which totally defeats the point of having a 125W head driving a 400W C4! Oh mighty BCgods of all things cabs (Such as @stevie, @Phil Starr, @Chienmortbb) have you any ideas/suggestions? It's all taken the shine off what promised to be 'new cab day' S'manth x

Cool! I’d not thought of doing this. I’ve also a scope so could maybe wire up something to directly my monitor/analyse the amp output. S’manth x

An update. The previous owner of the TC amp shared that he’d had no such issues, so less of a suspicion of the amp. S’manth x

Brilliant! I’d thought about recording the DI output but then realised it would not show any issues with the power amp, but hopefully the headphones will 😊 S’manth x

I’m not sure. Amp is running at 50%. The higher strings sound lovely, perhaps I’m just asking too much low bass. GAK seem to stock the C4 so I can compare an Apple with a newer Apple lol S’manth x

It's recorded using a Zoom H1n placed about 2m away on a 15cm tripod on floor; This afternoon I'm going to see if I can find my H2n, use better settings and try another recording. S'manth x