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Thread ID: 78541	2007-04-19 11:53:00	Any PA system people here?	CYaBro (73)	PC World Chat

Post ID	Timestamp	Content	User
542417	2007-04-19 11:53:00	I have a client who has a conference room that they need a couple of wireless microphones for. There are already 4 speakers and a TOA PA amp which has 3 microphone inputs. They used to have a 2x TOA Wireless Tuners (WT-780	CYaBro (73)
542418	2007-04-19 12:06:00	PM Personthingy	zqwerty (97)
542419	2007-04-19 12:08:00	Let's try that post again! Don't know what happened there. I have a client who has a conference room that they need a couple of wireless microphones for. There are already 4 speakers and a TOA PA amp which has 3 microphone inputs. They used to have a 2x TOA Wireless Tuners (WT-780) and transmitters but these have gone missing as well as the microphones. I'm told that it is cheaper (or much the same) to just replace the wireless systems with new ones rather than try and get just the transmitters for the existing tuners. Also different brands of transmitters most likely wouldn't work with the TOA. Would that be correct? Another question: On the back of the amp there appears to be a few different configurations for connecting the speakers with each one having different voltages?? How would the 4 speakers need to be wired up or does it depend on the speakers? I have been given prices for: JTS 8000 series microphones for $368+ Audio Technica 2000 series for $800+ Audio Technica 3000 series for $1180+ Having no idea on pricing for these things, do these look OK? Any one had any experience with any of them?	CYaBro (73)
542420	2007-04-19 12:17:00	[quote=CYaBro;543587]Let's try that post again! Don't know what happened there. I have a client who has a conference room that they need a couple of wireless microphones for. There are already 4 speakers and a TOA PA amp which has 3 microphone inputs. They used to have a 2x TOA Wireless Tuners (WT-780) and transmitters but these have gone missing as well as the microphones. I'm told that it is cheaper (o	somebody (208)
542421	2007-04-19 20:27:00	Can't offer you nay help with the mics... other than suggest you dig up the website that lists stolen gear and list... Actually i lost the bookmark, so if you google it, can you let me know please :p As for the second question: "On the back of the amp there appears to be a few different configurations for connecting the speakers with each one having different voltages?? How would the 4 speakers need to be wired up or does it depend on the speakers?" Im going to assume that it says something like: "4 ohm = 300w 8ohm =200w 16ohm = 150w" * i pulled those figures out of a hat * What this means is the more speakers you add, the more power the amplifier will put out because the impedance drops. To make that easier to understand, lets call it resistance, basically the less resistance, the easier it is for the amplifier to pump that little bit more juice out, but of course, it is then shared equally by the speakers, assuming they are similar, and wired in parallel. However, it's generally a bad idea to go below the rating stated (less than 4 ohm in the example above) as this makes it too easy for the amplifier to move sufficient juice to fry itself. There are exceptions.. but i can't be bothered going there. :) Can you post the exact model number, or exactly what was written on the back? If you can, i can give more specific advice. Also, what impedance are your speakers? 8 ohm would be typical, but not something to be taken as given. More info please!	personthingy (1670)
542422	2007-04-20 06:14:00	What this means is the more speakers you add, the more power the amplifier will put out because the impedance drops . . . . . . . . . . are we talking series or parallel speaker connections here? I can run 8, 8ohm speakers on a system designed to run 1, 8ohm single speaker just by carefully figgering the ohms and making adjustments in series vs . parallel wiring connections . I do this all the time with my Peaveys (1-120 watt, 1-200 watt) and my Crate 1200 watt Full Stack guitar amps . I know they are a little more forgiving than most amps, but the Peaveys are PA units I use for my bass guitar, so I think it applies here . :rolleyes: Think this way . . . 2-8 ohm speakers, in parallel = 4 ohms add another 2-8 ohm speakers wired in the same parallel configuration and then add these 2 to the first 2 in a series configuration = 8 ohms again!	SurferJoe46 (51)
542423	2007-04-20 07:49:00	. . . . . . . . . are we talking series or parallel speaker connections here? I can run 8, 8ohm speakers on a system designed to run 1, 8ohm single speaker just by carefully figgering the ohms and making adjustments in series vs . parallel wiring connections . I do this all the time with my Peaveys (1-120 watt, 1-200 watt) and my Crate 1200 watt Full Stack guitar amps . I know they are a little more forgiving than most amps, but the Peaveys are PA units I use for my bass guitar, so I think it applies here . :rolleyes: Think this way . . . 2-8 ohm speakers, in parallel = 4 ohms add another 2-8 ohm speakers wired in the same parallel configuration and then add these 2 to the first 2 in a series configuration = 8 ohms again! I believe i did say "assuming they are similar, and wired in parallel . " generally one would just keep adding speakers, unless there was good reason not to, and the knowledge of why not to . Anyway, back to the specific problem . . more info please	personthingy (1670)
542424	2007-04-20 07:55:00	Thanks for the info personthing and surferjoe. I will have to go back on site and have another look at the amp and speakers. Will let you know.	CYaBro (73)
542425	2007-04-20 08:14:00	Most amplifiers made for sound reinforcement work seem to like 4 ohms or more. Some ratings lie. The "holden graphic" which was a classic kiwimade amplifier from a couple of decades back that many bass player once used, and some still do, had big unfriendly writing on the back saying 200watts - 8 ohm, but these were happy to deliver a clean 300watts into 4 ohm, which typically would have been 2 8 ohm15inch speakers. In my experience they were more reliable with a 4 ohm load than the rated 8! My lab.gruppens all deliver best into 2 ohm loads, although the are rated to do so... Honestly, they deliver 4 figures into each channel loaded down to 2 ohm with joy.... mmmmmmmmmm better than donuts,,, Trust me here!	personthingy (1670)
542426	2007-04-20 21:24:00	I don't like driving 15 inch speakers on my bass . The cone is still recovering from one wave when another is generated at the core and the cone gets all distorted . You can see it on a strobe light if you like . For me, I like the 10 inchers as they have a faster recovery time and run a lot cooler . The heat too is another factor in ohms . . . or impedance, really . More heat, ups the resistance and there go the specs out the window! I really like using PA's for a bass amp as they are very close to human response and that makes the bass all warm and friendly sounding . Add a little compression and you're clean and powerful with little false harmonics and distortion . . . unless that's what you want . QUESTION: In the song "Don't Worry About Me" by Marty Robbins, what's so special about the bass-line? (50 points for the correct answer)	SurferJoe46 (51)
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