binky_bass

Yet another deal done with Tony! I have honestly lost count of the number of deals we've done! 😂 Always a great transaction, smooth and easy! The amp arrived very well packaged and bang on time! Thanks Tony for another easy transaction! No doubt there will be more soon! Russ.

Curious indeed... Not sure of the logic behind that! But the pick ups are circa £50-£70 second hand. Closer to £110 new if you can find them.

If you get a GK3-B pickup, they are actually still very useable. Without the pickup it's a bit pointless IMO.

Might be of use to someone! £112 but-it-now or you can make an offer, reckon if you got it at £80 it'd be a bit of a steal! https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F292970306344

Looks like it's been converter from a right to a left and back to a right again... the current knob placement is correct, the filled holes are not... who ever did the original right to left conversion did a crap job!

I'm a Phil Jones man myself. I've used many a MarkBass cab as well as a reasonable cross section of other cabs out there. For me a PJB 8b is the best for low end clarity with a fantastic transparency to let your bass/amp really speak. I can't see myself ever using anything else at least for the considerable future.

Just completed a trade with Johann, absolutely no issues at all! A good all round guy to deal with, a nice smooth trade and a good chat about bass too! Deal with confidence when dealing with Johann.

I tried to stack my two Phil Jones 8B cabs, utterly impossible due to the placement of the castors and the chrome nature of the corner protectors, they literally slide off each other. The single only design flaw on an otherwise impeccable cab! These looks super sturdy by comparison!

Can't you stack those MB cabs vertically too? Looks like the corner protectors are grooved specifically to allow for that...

Before I ran this rig I actually did send both MarkBass and Phil Jones and email asking if it was safe to run both cabs into the Markbass... No response from either. As such I did it anyway, in hindsight a potentially foolish manoeuvre, but hey, now I know!

I still don't feel quite at Ohm with all of this, but I'm learning! (awful I know...)

I used one 8B cab for a good year or so, no volume issues there to be honest. I recently got the other 8B from eBay as it was silly cheap hence the second cab. There is no real benfit to using both for the purposes in which I use them other than having two looks better than having one! Purest self-indulgence I know, for which I could easily have been punished with the blowing up of the MarkBass... So knocking up a series box from about £15 in parts would allow me to continue my (somewhat pointless) amp vanity. Either that, or get a second head for the second cab, or god fobid, SELL the second cab...

So 3 Speakon connectors and 4 bits of wire, wired in series, housed in a non conductive box would essentially do the trick? Weekend project...

So similarly, it would be equally unwise to run four Aguilar DB112 cabs (300w 8 ohm) into a TH 500 (500w @ 4 ohm, 250w @ 8 ohm) as that would also be a 2 ohm load? If the amp has two dedicated inputs for speakers, I assume daisy chaining two DB112 cabs into each input (4 cabs in total) would then be running a 2 ohm load? (I dont have 4 DB112s, I'm just getting my head around safe loads etc.)

Right, yeah I've had a read of that and you are indeed correct. So with these cabs being wired in parallel at 4 ohm each, because of the nature of parellel wiring the load becomes 2 ohm... so if one cab blows the other is still alive. Is it possible to re-wire them as series? This then would see them function at a joint 8 ohm right? ...But with the drawback of them both cutting out if one dies? My brain is trying to absorb everything here!

I've run the rig as in the picture for a good 3 weeks now, probably a total of 10 hours use, running the gain at circa 1/3 and the volume and about 1/2 with no issues at all. No overheating, no stuttering, nowt... The amp definitely says 500w @ 4 Ohm on the rear, and these cabs are definitely 4 Ohm a piece. Running these cabs together, supposedly at 2 Ohm into a 500w @ 4 Ohm head, should I expect derterioration over time or more of an instant death? As I certainly havent experianced the latter. Obviously I don't want to kill the amp, but as yet (in my blissful apparent ignorance!) I have had no problems whatsoever running the rig as is.

Am I right in saying running these cabs at 2 ohms pushes the head beyond it's limit by a factor of 2? So would the head need to be run at a max of half power before hitting the danger zone?

I'm after an education here, so any thoughts would be happily received... What's the potential damage to the amp? From a logical point of view I would see the amp as feeding the cabs, so where does damage to the head come into the equation? And yes, I understand the slightly condecending statement of "The amp doesnt magically double in power to 1200w", I was more inferring to the potential load being recieved by the cabs if functioning at 2 ohm the the resitance is halved. So, with two 4 ohm cabs coming into the amp at 2 ohm, whats the risk of damage if the amp is rated at 600w on the rear panel with the handbook rated power being 500w into 4 ohm?

I'm not great with the wattage/ohm equation. Does daisy-chaining two 8B 4 Ohm cabs then present half that load to the amp? With potentially a 2 Ohm resistance would I be right in saying that the cabs are then much more vulnerable to damage as with half the ohmage it essentially doubles the recieved wattage into the speakers? With each cab being 400w and the head being 600w would it then stand to reason that I could in theory push the 600w to say 2/3 power (say 400w equiviance) based on the 2 ohm resistance effectively halving the joint cab wattage to a combined 400w instead of 800w? So really, I suppose the question is, am I safe enough with running the Markbass at no more that 2/3 volume into both these cabs if they present a joint load of 2 ohm? Techy stuff!

MarkBass Multiamp Mono.

They are both 8B cabs. I've had no issues running the head with both cabs. The cabs are daisy chained with only one being directly linked to the head.