So UHF and HF refer to the range not the drivers. That's reasonable, and handy, on a two-way system. I sort of expected that would be left to the room EQ in a studio setting but I guess it makes it seem more traditional for a JBL studio monitor.
So UHF and HF refer to the range not the drivers. That's reasonable, and handy, on a two-way system. I sort of expected that would be left to the room EQ in a studio setting but I guess it makes it seem more traditional for a JBL studio monitor.
". . . as you have no doubt noticed, no one told the 4345 that it can't work correctly so it does anyway."—Greg Timbers
Little off topic but...
Why there's 8 Ohms written on the back plate and in the specs there's 6 Ohms?
(First picture in post #7)
You obviously have been spoon fed...LOL
The market is the home consumer who wants a JBL monitor (M2 = Pro market)
The controls are self explanatory, HF and UHF trim
The manual is quite clear
https://www.manualslib.com/manual/1168570/Jbl-4367.html
Remember, my first 50+ years of listening to JBLs consisted my 030s in the main system—two drivers and one L-pad! My last 36 years have included the L112s in the bedroom—three drivers and two L-pads. My last almost-nine-years have been spent enjoying the 4345 clones—four drivers and three L-pads. One for each upper-range driver in all cases. I hadn't really considered any other way and figured the rest was left to the EQ!
". . . as you have no doubt noticed, no one told the 4345 that it can't work correctly so it does anyway."—Greg Timbers
JBL old school sound comes back!
I should hope that for the price of new speakers that they sound better than old school sound otherwise just buy some classic ones.
Some kind of happiness is measured out in miles
Well in adjusted pricing if a 4343 cost close to $5000 in 1977 then the 4367 in today's prices 40 years later is good value
Someone once advised me (may have been Ian) when setting up my new-to-me 4345s that using the L7 (which has no L-pads) as a reference point in that room and setting the L-pads on the 4345 with the L7 sound as a guide, might be a good starting point. So, now that I understand the purpose of the "frequency" trim pads on the modern systems is nothing more than tone-controls, it gives even more credibility to the use of an EQ in a room system—another big hot-button at the root of many audiophile arguments.
If I felt like counting, I believe five of my dozen-or-so JBLs have one L-pad control per non-LF driver. Add one for the 250ti mess on the backside. The rest have none. Consumer versus pro monitor? Consumer versus wannabe "pro"-sumers? If the point is to adjust for room differences, what self-respecting audio engineer wouldn't do that from their desk rather than climbing up to the soffit-mounted boxes. Is all of it unnecessary and better left to permanent resistor values to achieve the ideal anechoic performance and letting the operator adjust for room variance at his control panel? What is the point of the L-pad then? And how can the pros here even attempt to explain the need to a spoon-fed amateur?
I may have to change my title to Spoon-Fed Amateur, though I only changed the original "Bottom-Feeder" at the request of others here. I've been called worse—and by members of this forum!
". . . as you have no doubt noticed, no one told the 4345 that it can't work correctly so it does anyway."—Greg Timbers
Please forgive me my bad English but am I ignored?
I've recently got 4367 and I'm impressed with the sound so much! I'm new to JBL. Previously had B&W 802 D2 & D3.
My McIntosh MC601 has 8,4,2 ohms terminals. I've read on other thread that I should use 4 ohms terminal. And to my ears the sound is definitely better than 8 ohms.
DIY Array, 2242 sub, 4408, 4208, Control 8SR, E120 Guitar cab, Control 1, LSR305.
I like old school an iam not that age, it's senseless to reinvent the wheel
here, if you have no music to appreciate, maybe orchestra recordings, but thats
as good as it's going to get.
So did a stir you up?
I hope not.
Lets look at the facts.
You are right all the old Pro monitor systems with multi drivers used L pads.
The facilities and engineering of networks was a far cry back then from today.
That is irrefutable.
The vintage pro monitors had fully variable Lpads with "0" position somewhere and "Full" was around +4 all the way down to -10 or so.
Its quite difficult to get both left and right speakers exactly the same without some sort of measurement of the levels.
I did not refer to the L7 but its not a bad idea all the same.
My more precise and simple diy technique was to use the ambiguous Tandy SLP meter, the one with a needle gauge. Just feed a steady state sine wave in the mid point of the range of each each of the upper drivers . Then measure it and then turn the Lpad down from full in 1 db increments.
i.e.HF +4 is Full, "0" is flat on the 4345, so you set the sine wave at 5 hertz with the Lpad up full and the Tandy SLP Meter reads +4 or what ever reference you plant to use.
Then turn the Lpad down until the needs reads 0 db (or 4 db less)
Do that for all the other Lpads and you are in business.
But like do it by ear and you will go crazy because small differences between there left and right channels will throw out the tonal balance and stereo image.
The better domestic systems like the L250Ti and the statement systems had fixed position level adjustments for exact adjustment of a particular frequency range.
And those fixed resister adjustments were awkward.
The 4367 is much smarter.
If you look at the actual adjustment its really narrow and the adjustment is exact.
As a side point since the 60's the JBL marketing guy has played the virtues of the JBL pro monitor in the form of a domestic version aka the JBL 4311 and the Century.
The 4367 is no different. It's for the home JBL nut case but he is not going to have a 1/3 octave pro equaliser in his lounge room.
So G.T with his advanced facility at Harman arrived at more convenient and far more precise adjustment to cover most variations in rooms, placement and voicing with other equipment in the home.
BTW I would not call a range of -1 top +1 db a tone control, its a fine adjustment of the frequency contour.
Most tone controls are -10 to 10 db.
If you refer to the manual its self explanatory.
Things have gotten easier to adjust.
But change in itself as a behaviour is not always easy.
There are currently 1 users browsing this thread. (0 members and 1 guests)