pragmasi
Responses from pragmasi
| testing a crossover between mid pos and neg 2.7 ohmsOkay... before you said that you were getting 0Ω across the MF +/- outputs with the driver disconnected. Is this the same measurement? If it is then it's close enough not to worry about for this exercise. As imhifi... | |
| Thoughts on Active/Passive Speakers? Looking for pros and cons. Most, if not all active speakers have active crossovers...what does that mean? It means the signal passes through the crossover, followed by the power amp and then reaches the speaker. Passive goes power amp -> crossover -> speaker. The main... | |
| testing a crossover mid speaker cable going to driver,dead short.no driver connectedActually looking again you should be getting around 2.2Ω across the Mid driver outputs. I'd look at the photos again, but they're not there any more. The area to inspect is the bottom... | |
| testing a crossover resistance between IP POS And IP neg -OL Okay, so that checks out... as long as when you put the whole lot back together you still get open circuit at DC across the HF/Mid posts all is as it should be and there's no DC load on your amp. | |
| testing a crossover I can guess, but that would be uncalled for and prematureIs that in response to me?.. don't know what you mean. Only point I was trying to make is if you change lots of things at the same time sometimes it's difficult to know what the original pro... | |
| testing a crossover Yup, I don't disagree and that's good advice. I'm mainly interested to see what the cause is... it's a weird one. | |
| testing a crossover fiesta75 and imhififan are on the money with their advice... but I'd hold fire with the soldering iron until you've got a little more to go on.IP+ and IP- should be open circuit at DC (OL), although you may need to leave the probes in place a few ... | |
| testing a crossover Are you measuring the resistance across IP- and IP+ on the PCB? It looks to me like IP+ routes to two resistors (2.2Ω and 3.3Ω), there's lots of clearance between the tracks and no obvious short. So even if there were a problem further down the li... | |
| Single vs. Dual Subs Just for the record, I do this regularly with a single sub, traps and careful use of an EQ.I guess the advantage to doing it this way is that there is less trial and error involved. If we ignore the EQ for a minute then room treatment only attenua... | |
| Single vs. Dual Subs xcool - Our ears aren't good at locating low frequencies so subwoofers don't contribute to the stereo image. In fact you will probably find that the best locations are not near your speakers or symmetrical.What you're looking for is for each sub t... | |
| Single vs. Dual Subs The technical theory behind multiple subs stacks up and there’s a lot of support for it. The only caveat I can see is that to make the most of it you need to be pretty flexible about where those subs go, if they just go right behind the L/R speake... | |
| Right angle wall plug on power cables All wall plugs in the UK have the cord coming out pointing towards the ground... it's just a safety device so that you don't pull the plugs out by using the cord. I've just realised that very few people in the US will have had the experience of ac... | |
| What’s the relationship between gain (dB) and power (watts)? Is it true then that the output stage of the amp 'transforms' the amplified signal from the gain stage (in voltage) to current (in amps)?That is literally true for Valve amps in that they have an output transformer and similarly a key feature of t... | |
| What’s the relationship between gain (dB) and power (watts)? I think the OP has been answered but I've been trying to come up with a simple way of talking about gain structure for a while. I don't know if this will add much but here goes...The maximum output voltage of an amplifier can be calculated from th... | |
| Why don't more recordings have soundstage outside of speakers Mijostus - You ability to determine where a sound is coming from depends mostly on where the loudest sound in coming from and the delay between getting to one ear to the other.You then go on to talk about relative amplitude and don't mention the d... |