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The problem is that IME most "monster" players that I see being heralded on here and similar music forums, are musically boring and wouldn't recognise a decent tune/song if it slapped them around the face. As I've said before, parts that are technically challenging to play but repetitive and ultimately not very exciting for the people playing it are and have been essential components of a lot genres for the last 40 years. Maybe if my band were famous enough we could employ people to play these parts exactly as we have composed them, as well as tell them how to look and dress and STFU the rest of the time, then we'd replace the machine that does this job without complaining.

Alright I have probed again and there is no audio coming from pin 7 on the breadboard. 🤯 Must have made a mistake in my notes the last time. Audio is only coming from the pin 6 output as expected. I'll review the PCB again and compare the 2.

While it's all been good advice I don't think this has moved you forwards too much, though it may have refined your thinking. What you are really asking for is a small'ish/portable single speaker that matches your Elf nicely and you have a bigger system when you need it. The Elf is voiced differently from your Streamliner so you want something with a bit more 'oomff' at the bottom end. Have I got that about right? I've got a Warwick Gnome in my bass case I use mainly the same way, but also as a backup if my main amp goes down. I pair my Gnome with variously a 6" cab, an 8", 10" and an LFSys Monza, also a 10" cab. I've got 12" cabs also but I've never felt the need to use one with the Gnome. If I need that much volume I take a bigger system. I'm going to be a heretic and say 2db is worth having if you don't have to sacrifice anything else so 4ohms isn't a bad thing but Bill is right in warning you that you won't be able to mix or pair cabs with this. However you can buy cabs that are louder than others so you could buy something 8ohms and efficient so more than 2db louder than some 4 ohm cabs. Since there aren't many 4ohm cabs out there it makes more sense to me to look at any cab, have a listen and then decide on how it sounds and simply don't worry about the impedance. I'd suggest you stop worrying about using a 12 too all other things being equal you can get better bass out of the same size cab by using a smaller driver rather than squeezing a 12 into something portable. Look at 10's anbd 12's. My experience with the 6" speaker it that it is way louder and more capable than I expected. I designed it for open mics to match up with amplified vocals and acoustic guitar and at most open mics it can be the loudest thing in the room. As a joke I took it to a rehearsal and set it up next to the drummer who was always too loud. Actually it was loud enough and I didn't bother swapping it out for a proper speaker. Small rehearsal room and I backed it into a corner to give as much extra help as I could, I also rolled off the bass a little and boosted the mids to give a little more volume and protect the speaker but I surprised myself. I've used it at dozens of open mics and it always causes a stir. The 8 has an equally sensitive driver and what you get extra is all at the bottom end below 80Hz. It sounds great. You aren't going to use it at an open air gig or a room with 100 people in the audience and probably not with a full on rock band but it'll do a decent job in a smaller venue or with something relatively laid back even if you have a drummer in the band. My regular 10 has a horn as well and a really clean sound. I've regularly used it with a pop covers band, without PA support in most pubs will work and with PA support it is easily good enough for the whole band as a stage monitor. I'd use this mainly with my 300W amp but I've tried it with the Gnome and I've still had a little headroom. All these speakers are home built and I've published the designs on BassChat but they obey the laws of physics, there's nothing special about them. Nobody commercially makes one anything like the 6" cab but there are plenty of cabs you can buy like the others. Only you can decide what limitations you are happy with based upon simple practicality. My experience says we often take far more kit than we need. In the 60's and 70's 100W was considered to be a decent amp and 200W a monster. Amps are so cheap relatively now that we all run much bigger stuff and the standard 300/500W amp is probably rarely actually needed to work flat out. As a practical suggestion how about something designed to have an old school warm bass sound like the Barefaces One-10, Mark Bass also make some warm and loud sounding cabs but so do many manufacturers, go and try a few and see what you think.

Shut Up - Madness

The only "issue" I've had with the standard pickups/preamp in the Space 5 is a general lack of output. I'm used to very powerful pre's and the Space 5 seems to have about the same output as a passive Jazz bass. This is, of course no problem when you give the amp some extra input gain. It is a very polite sounding bass, but also capable of sounding very full and gritty. You need to run just a slither of extra treble and a gobful of bass to make the Mark Bass pre sing. I like the Bartolinis personally. They are a very smooth sounding pickup, and you hear more transmission from the body and fingerboard than the preamp. I prefer this, as when you hear too much preamp, things can get harsh very quickly. Simply put, the Space 5 is a nice instrument that needs some EQ-ing. It's not a nice sounding instrument when run flat, and you do have to spend some time dialing in your sound. Having heard mine played live by others, I can report it's a great sounding bass.

They're great pedals! I use one of these with my upright - it handles the impedance matching between my amp and the piezo pickup, functions as a pre-amp, and winding down the '50' slider removes most feedback.

I think you are going to need to draw a diagram showing how everything is currently connected up and what protocols each device uses to talk to another. What you want should be do-able as I do something similar using an AirTurn Pedal, Helix Floor and MacBook. However I suspect that you might need to get a MIDI interface for the iPad. Also does OnSong support MIDI program change messages either to select the next page/song or send them when a page/song is selected?

Thanks - yes, I've really grown very fond of it. I hesitated for a while, as I had one of the Custom Shop designed Rascals about ten years ago and it didn't fit, which put me off short scales, but the Mustang has that just right feeling. And as Nick Campbell Destroys said in the promo video for Guitar Center, it really does sound like an angry Jazz bass when everything is dimed. Happy Mustang-ing!

I’ve got a basically new TRBX305 for sale at £299 here. I found the Yamaha’s pickups and electronics were flexible enough to provide me with a broad range of sounds. As an active bass of course you get a massive output! More than welcome to come and give it a try:

Thank you

Yeah, T-Dog amazing work

No, it has it's own "Fender designed" alnico pickup which is the smaller than Japanese vintage size (40mm across each side rather than 44mm). It sounds great as long as I dial the tone pot back about 60%. That's where 'that tone' lives. I find it a bit too harsh sounding wide open, but maybe that's just me. Congrats on your Performer! Mustangs are great aren't they? I wish I'd tried one earlier, such fun to play. I love the strong fundamental and lack of overtones. Suits me just fine.

Rabbit -Chas n Dave

Rabid Child - They Might Be Giants

Again, I'm equally confused by this, but the properly working breadboard version of this same circuit (which I have linked a couple comments ago) also has audio on pin 7. I get that pin 7 should be only connected to the power rail... To clarify, I also swapped the OP07 between the breadboard and the PCB one to make sure it's not an IC issue, and there were no changes. Breaboard continued to work, PCB continued to weirdly distort.

Remember that strings make a difference. If you don't get the sound you want in the first phase, prepare to spend some money on different sets.

If you're feeling particularly self loathing, there's Pirate Studios in Earlsfield. Depends how much you like getting passively stoned.

You should not have any audio at all on pin 7. If you have then there is a big problem. Photos of the pcb your working on would help more than voltages

Bloodstone Guitar Works did a great rewind on a pickup for me https://www.bloodstoneguitarworks.com/