Chienmortbb

MOSFETS have as number of advantages over bi-polar transistors especially as they act more like thermionic valves in mnay ways. They are also inherently safe. That is as temperature increases, the MOSFET will become more resistive, reducing the output current and hence dissipation and heat. Bi-Polar transistors allow more current to pass as they get hotter and can suffer from thermal runaway until they go pop. The downside is that the power supply voltage for a MOSFET amp needs needs to be higher for a given output. So you need a beefier power supply but if there is enough available it might have a bit more real ,p[ower available at volume but as I always say, a watt is a watt so if they were louder then there must be some way to measure it.

Many of their amps were designed around MOSFET output stages and these were easy to scale up to higher powers. The BLX130 that I had spaces for extra output MOSFETs suggesting that the same PCB was used for a number of models. As electronics engineer I must say they well engineered, maybe over engineered, by the standards of the time.

The thing is that when discussing many things with religious zealots you get the same mantra over and over again. There are good amps and bad amps . Some people like bad amps. some like bad backs. The point is that it is the design than counts NOT the technology. Oh and having worked on a few. Trace amps were really well designed.

Phil my point was that it was designed for pole top mounting and would not perform as designed. It will have more bottom end and that may or may not be a good thing.

Not PC these days but absolutely brilliant.

The original PP3 had six 1.5V calls so 6 x 1.5V = 9V nominal With rechargeables the cell voltage is 1.2V As each cell is 1.2V so 6 x 1.2 = 7.2V ( i have never seem a 7.2V 9V battrery. BUT most manufacturers out in 7 cells to give 8.4V. Some now put in 8 cells making 9.6V hence the title of the thread. Most pre-amps use a rail splitting technique that effectively gives either 3.6V, 4.1V or 4.8V to each side of the circuit. 3.6V is close to the lower limit for many op-amps (op-amps are the basic building blocks for most onboard pre-amps). So basically the are covering their backsides. EBL are rated at 8.4 but quickly fall as can be seen by the chart below.

How are you getting on with them? What voltage do they put out?

I bought some cheap ones from Thomann tagged on to a larger order. They were OK but the winds were big and the strings seemed rougher. I bought some Picatos from Absolute Music for £12,99 and they were a different class. Funny though all the low cost strings are in lighter gauges. However I am about to treat myself to som hand wound strings from Newtone.

Bill is right that a passive cab wit that response is a PA top. The problem is when you put it on the floor, the low end becomes unpredictable (unless you designed it, then yopu could predict it.

I have always liked the look of this https://www.axminster.co.uk/axminster-drill-guide-500458

The thing is that those are all digital devices and in my experience add 2-3ms each minimum. The Ramsa WRDA7 digital mixer , for which I was Technical Manager, had a 2mS delay although Yamaha suggests that 4mS is the norm for digital mixers. I suspect that Smoothound are being truthful with their figures while many others choose a best case scenario. I have used my Smoothhound through a Zoom B1on and then FOH through a Behringer X Air and had no problems. Others have used my setup and never reported a problem. Incidently on the latency video above, although I can hear some difference at around 5mS, there does not seem to be a real issue with a double beat until close to 30 for me. The biggest issue we have had is that with some of the lower priced units, there is interference with the X-Air mixer's wireless signal causing remote operation to fail. This does not happen with the Smoothound. In my opinion, IEMs should not add any delay as they are monitoring systems. They should faithfully reproduce the signal they are given including timing

For black machine screws try https://www.westfieldfasteners.co.uk/ScrewBolt_M.html

Phil Jones puts drivers in two columns, to my mind that is not a line array. As I understand it, the point of a line array is that it focuses the sound. With the focus being more defined as more vertical* drivers are added. Put drivers side by side and the focussing effect of a line array is lost. Putting multiple 5” drivers together will help the low end but * Assumes the aim is to restrict the sound in a vertical direction.

I tried a thumpinator and saw considerable cone movement that suggests to me that the -3db point is set too low. I have only modelled it but to me 35 Hz and up works best. As for built in HPF, ant manufacturer should disclose the frequency and slope of the HPF.

I agree, I would plump for around 40/45 Hz. I also agree that the kick must be heard but not over-power the other instruments, I suspect some of the problems with the kick though PAs is also over use of dynamics on digital mixers.

Wrong thread I know but I have been to gigs where it seems the kick is set up first (. Close to using up all the headroom) on its own it sounds great. Once the band plays is obliterates not only the bass guitar but everything else. Are they taught this, are their ears shot ( soon will be) or is it that they have never been trained. I agree that an HPF is a very useful addition to a bassists arsenal. In my opinion many can be set too low. If you model a speaker in WINisd then put a forth order filter on, based around 35HZ it makes almost no difference to the output but reduces the work the speaker ( amp amp of course) does considerably.

I would agree Phil although some of the Chinese stuff at B&Q I have seen recently is poor quality.

Our guitarist used a cheap wireless system the keeps knocking our the signal for the Behringe Air mixer. It is quite happy with my Smoothound.

The RM112 is very light. Around 13Kg if i remember rightly.

The delay will be due to the Dorset’s not being connected for a few seconds while the power supply settles down. I am not familiar with the model but can you take some hi res pictures of the inside and paste them on here?

To be honest power in the UK is fairly clean. Your DI should be able to reject any power noise.

No dimmers use a technique similar to PWM as used in Class D Amplifiers.

The first answer is correct it’s a number of nominally 8 ohm abs are closer to 6 ohm, the 2 ohm setting might be better.

Chris Squire for me. First bassist that made the bass more than a rhythm instrument.

It can be done but both add complication. Pedal supply would be a 9V regulator and the aux supplies on the 125ASX2 has a limited current draw, 350mA if I remember rightly. This is not even enough to power a Zoom B1 ON or B1 Four let alone a Helix. The HX Stomp needs 3A at 9V. I could run the pre-amp supplies at +/-9V to simplify matters but that would reduce the headroom in the preamp. I have assembled a fixed voltage +/- 15VPSU for the preamps Phantom Power could be put in the final unit but for the prototype I want to prove the concept soI am keeping it simple. Personal natters are keeping me from the project at the moment but it is progressing if more slowly than I had hoped.