121.7db! MONITORS
Gadget
Posts: 4,915
Well, I haven't got all the data together yet but I came up with another BIG benefit of the 260 over the DRPA... that the Auto EQ process can be done WAYYYY louder.. and as those of you that have been doing sound for a while know... musos are DEAF!!!! 
Using the auto EQ process and the mic where my head would be, with the aid of the RTA in real time, with a single pass... -0-(flat) response hi precision (took about 20 seconds after I set up the xover and set a basic monitor balance) and then with an SM58 held 1 foot or so (start higher and move in) watching the RTA, I then transferred the basic info to PEQ (even forgetting a boosted band within the PEQ area that was generally a cut...4 PEQ's and 2 GEQ bands (80 hz and 12K) I got monitors (did I say that I'd bi-amped the monitors? makes a HUGE HUGE HUGE difference) the sounded MONSTEROUS and I got 121.7 db of volume with a 15 \" Eminence cast frame (discontinued (WTF) coax with a 20 watt amp for the (2\" diaphragm, 1\" exit Selenium TI205 drivers with ferro fluid treatment)! THEN... I took the mic and held it (aimed it strait DOWN into the horn) 1 foot from the horn in the middle of the speaker and not a whimper! Thats the SPL of a jet plane taking off!
Well, when I was done, the club owner proclaimed, well no need for the mains.. the monitors are DEADLY!
Tomorrow...4 labsubs 25-50 hz, 2400 watts per cab, 8 single 18 turbo manifolds running 50-130 hz, with 4050 watts (2 ohms stereo), and 4, 12\" 2 way tops with a MAC 3600 running the 4 12's and 450 watts for each 4, 2" exit B&C 750 drivers, on 40x 60 horns...
Should be interesting.. the band...the opening act for the 2007 new years eve NYC show!
It should be interesting...
G
Using the auto EQ process and the mic where my head would be, with the aid of the RTA in real time, with a single pass... -0-(flat) response hi precision (took about 20 seconds after I set up the xover and set a basic monitor balance) and then with an SM58 held 1 foot or so (start higher and move in) watching the RTA, I then transferred the basic info to PEQ (even forgetting a boosted band within the PEQ area that was generally a cut...4 PEQ's and 2 GEQ bands (80 hz and 12K) I got monitors (did I say that I'd bi-amped the monitors? makes a HUGE HUGE HUGE difference) the sounded MONSTEROUS and I got 121.7 db of volume with a 15 \" Eminence cast frame (discontinued (WTF) coax with a 20 watt amp for the (2\" diaphragm, 1\" exit Selenium TI205 drivers with ferro fluid treatment)! THEN... I took the mic and held it (aimed it strait DOWN into the horn) 1 foot from the horn in the middle of the speaker and not a whimper! Thats the SPL of a jet plane taking off!
Well, when I was done, the club owner proclaimed, well no need for the mains.. the monitors are DEADLY!
Tomorrow...4 labsubs 25-50 hz, 2400 watts per cab, 8 single 18 turbo manifolds running 50-130 hz, with 4050 watts (2 ohms stereo), and 4, 12\" 2 way tops with a MAC 3600 running the 4 12's and 450 watts for each 4, 2" exit B&C 750 drivers, on 40x 60 horns...
Should be interesting.. the band...the opening act for the 2007 new years eve NYC show!
It should be interesting...
G
0
Comments
1) Run the Auto EQ and leave as is.
2) Connect the 58 to the system and induce feedback.
3) Use the PEQ's to tame the fb. (along with the 2 bands on the GEQ.
or did you transfer the auto EQ data to the PEQ's and just need the 2 filters on the GEQ to get that volume.
The live RTA is where you kind of lost me. Were you manually pinking?
DRA
PS - Have you use the \"Auto warmth\" feature on the 4800? That would be a really nice feature for background music situations were ambient noise is constantly changing.
It was like this....
1. Set up the speaker in the garage, ceiling height 17'6\" tons of stuff all around
2. set mic up in approximate head position (6'3)aimed at monitor (15'coax)
3. bi-amped and roughed in balance wise lo to hi
4. auto eq pass -0- response hi precision -10/-12db input (LOUD..REALLY...)
5. view EQ curv,e get a feel for the way it sounds...SM58 running through small mixer running dead flat EQ and gain structured properly...(remember the RTA mic runs through the 260, which runs into the amps, I simply had the mixer set up into the 260 so I could exit the Auto eq and go right to the mic...
6. took spl measurements with spl meter (not a radioshack one but a good one) 3 feet from the monitor as I sang really loudly into it... aimed same mic right into horn 1 foot away.. silence...
7. transferred Eq curves (roughly because in one case there was a boosted band within the pattern...could well have been a reflection though..) ( I almost always look at a fully cut bunch of bands with a good boost in the middle as a potential cancellation)
8 re-test feedback potential with 58 watching the RTA in real time as I sweep the mic over the speaker, and as feedback occurs insert further PEQ filters till blessed silenc is the only thing left...again mic in hand I do my sing thing with the meter ...sound is awesome! no feedback... 121.7 DB! install monitor for tonight...Tracey Blake.(opened for Outkast.. New years eve..)
Now on to the new system...WOW got it done last night.. it is AMAZING! 4 flown OAP T112 (12\" with B&C 750 2\" 40X60 horns), 8 proprietary (EV S181 type) 18\" turbo manifolds ..2 Labsubs ground stacked
Subs, powered by Mac 3600 stereo 31.5 HPF@ BW 18-51.1hz @ LR24 LPF
Lo mids 54.1hz LR24 to 148.7hz LR 24 RMX 4050 @ 2 ohms
hi mids 153hz LR24 to 1189 hz LR 24 two RMX 2450's mono on each pair
Horn 1297 hz LR24 Caver PM1.5 stereo
The OAP's run stereo, the rest mono
It will HURT you.. and it sounds SOOO rich and beautiful ...The owner was in shock... actually started THROWING MONEY AT ME!
I'll let you know how it goes!
G
Post note...Some guy came up to me during the show and told me that the (concrete) floor was moving up and down . I said there was no basement...No, he said I live a couple blocks AWAY in a basement... and the floor is moving... :shock:
DRA