Bobby's Dad's thread....

[pennysdad]

I don't get any reception at all in my building with ANY network.
It's not fair.

 

[derek92994]

I don't get any reception at all in my building with ANY network.
It's not fair.

I have never heard of that, now that's a black spot, or should I say black hole? Are you underground or something?

 

[pennysdad]

I have never heard of that, now that's a black spot, or should I say black hole? Are you underground or something?

yes, it's a black spot.
(my appt is the black hole....)
.... and it's ground floor on the opposite side of a hill to where the transmitter is.
but it's sort of all right as I don't want to talk to anyone anyway.

 

[Gibsonian]

Got some pics of those EC's ?? And do you have a setup to dial em in?? We could all use a lesson in tri-amping.

I've been triamping for years now Lee.

 

[derek92994]

I've been triamping for years now Lee.

What is tri-amping?

 

[laatsch55]

Derek, tri-amping is where you bypass the internal passive speaker crossover and go through an electronic crossover and have one amp for the woofers, one amp for the mids and one amp for the tweeter. In fact an Aussie named Rod Elliott has written a very good article on Bi, tri amping. I'll post a link here in a minute.

 

[laatsch55]

I've been triamping for years now Lee.

Yeah, that's right you have. How did you initially set it up??

 

[derek92994]

Derek, tri-amping is where you bypass the internal passive speaker crossover and go through an electronic crossover and have one amp for the woofers, one amp for the mids and one amp for the tweeter. In fact an Aussie named Rod Elliott has written a very good article on Bi, tri amping. I'll post a link here in a minute.

That sounds like hardcore audio. My guess is that it is more of an efficient method.

 

[laatsch55]

Here ya go Derek----http://sound.westhost.com/bi-amp.htm

 

[derek92994]

Here ya go Derek----http://sound.westhost.com/bi-amp.htm

Thank you, my brain just went Pop! I must rest shortly. I'll read as much as I can before I collapse =).

 

[laatsch55]

That is probably the definitive article on tr-amping. Skratch has also been tri-amping for years

 

[Gibsonian]

Yeah, that's right you have. How did you initially set it up??

First did it by ear when I started, as that was all I had.

Nowadays I use a 61 band RTA/mike to set crossover points, driver phase, balance output levels for the low, mids and highs, and adjust speaker position (within the tiny limits I have) and eq.

Still go back to ears for the final tweak. I am certain that the RTA for the first step is helping with a better sound in the end. I highly recommend a good one with enough bands to do the job properly.

 

[Gibsonian]

That is probably the definitive article on tr-amping. Skratch has also been tri-amping for years

This is the article that got me started.

 

[pennysdad]

hi all, just got home from messin' with the IMAX speaks again.
for Derek: it's a stereo 4-way active (quad-amped if you want to call it that) system running two BSS fds360 active crossovers.

that's a good article Lee. thanx for posting that link.

Derek, don't be scared off. it's a lot easier than it may seem at first. once you know what everything does, you soon get the hang of it.
I've bi-amped forever. rock'n'roll PA's are generally all bi-tri-quad-amped hence my own home systems have been also.
once you get into time alignment and phase of drivers, then it's a must way of doing things.
amps run cleaner with the only load presented to them is just the speaker and no other components (eg passive x-o's) to smother them. (a note to passive x-o designers around the world - give up, it's a lost cause guys.)
also amps don't have to bother reproducing a full bandwidth signal (20Hz to 20KHz) as they are designated to operate only over a limited bandwidth as dictated by the active x-o BEFORE the amp. that improves the clarity and efficiency of the mid and high amps exponentially. also, as it's only the bass that needs huge amounts of power it means you can run smaller amps for the mids/highs.
you could go on forever discussing the virtues of bi-amping, but until you do it, it's very difficult to really understand from just reading about it.
you'll just have to try it.
plus more importantly, it gives you more flashing lights and knobs to play with and that's gotta be worth somethin'.

 

[pennysdad]

Nowadays I use a 61 band RTA/mike.

61 Band?
wot is it? (make and model please, so I can look that one up.)

 

[Gibsonian]

Yes, active crossovers give you more amps, what guy doesn't like that? (ok there are some but they got me wondering, if you know what I mean)


For the RTA I have a Behringer DEQ2496 digital eq, and it has the RTA built into it. I also use their calibrated mike and a mike stand I got from work.

 

[pennysdad]

Yes, active crossovers give you more amps, what guy doesn't like that? (ok there are some but they got me wondering, if you know what I mean)


For the RTA I have a Behringer DEQ2496 digital eq, and it has the RTA built into it. I also use their calibrated mike and a mike stand I got from work.

I didn't know about that one.
I just gotta get myself one of those!!!!
I'll see if I can borrow one later this week.

fanx fer dat....

 

[pennysdad]

Meanwhile.....

.... wouldn't this give ya the sh*ts?
Just missed out.

http://www.gumtree.com.au/s-ad/weth...i-813-professional-studio-monitors/1019595076

$600 the pair!

Gone now, of course.....

..... and totally heartbroken.

.... damn, I haven't felt this bad since I missed out on the three pairs of Bryston 7B's for $300pr a couple of months back.

 

[Skratch]

A tri-amped system can sound really good, but improperly set it can sound like shit. Mine is all horn loaded speakers. I have to run the midrange down quite a bit because of the sensitivity of the mid-horn. After you play with it enough you will start to see what each knob does and how it changes the sound. Crossover frequency, output level and slope will change things completely. Just make sure your speakers are capable of the frequency range you are sending them, especially your midrange or you could easily take out the diaphrams from too low a crossover point and tweeters.

 

[derek92994]

I'll keep this bi-amp method in mind, thanks for the info guys, sounds very interesting, wont have the funds to set it up for some time, very tough times at the moment.