Product Catalog: Part 2

Site: QSC
Course: Cinema 101 Training
Book: Product Catalog: Part 2
Printed by: Guest user
Date: Sunday, 14 April 2024, 8:21 PM

Description

Video Transcript

00:08
Ready for more? Let's get going!
00:10
Now let’s jump over to loudspeakers. Generally clients consider two things when choosing cinema loudspeakers.
00:18
The Room Size and the desired Level of Performance. We’ll cover options for both.
00:23
But before we do, let’s clarify that SC stands for Screen channel, the loudspeakers you don’t see because they’re usually hidden behind the screen.
00:32
SB is for subwoofer, and SR stands for Surround.
00:38
And because there are so many models of SCREEN CHANNELS, let’s spend a minute to talk about how they’re named.
00:44
It’s based on 3 digits, sometimes followed at the end by a letter.
00:49
The first digit represents the SERIES of Low Frequency cabinet that the screen channel uses.
00:54
See, since they are so large, most models are made up of combinations of different Low and High frequency components that are shipped in separate cartons,
01:04
and each have their own model name.
01:06
We use three different SERIES of Low Frequency sections for our screen channels.
01:11
So if the first digit is a 2, that model is using the LF 2215 cabinet with two 15 inch woofers.
01:19
If the first digit is a 3 that means we’re using the LF 3215 2x15” cabinet.
01:26
They look exactly the same, but use different woofers.
01:30
And a 4 is for systems using the LF 4115, 4215 or 4315 cabinet, with 1, 2, or 3 woofers respectively.
01:40
The 4 series cabinets feature a higher power driver, so you would choose these for large rooms and 4-way systems.
01:49
The second digit represents the number of woofers used, between 1 and 4 generally depending on room size.
01:56
You’ll notice our largest systems with 4 woofers are actually comprised of two separate but identical cabinets.
02:04
The third digit is for the number of frequency divisions or “ways” of the system: 2 for 2-way, 3 for 3-way, and 4 for a 4-way model.
02:14
Choosing between 2-way, 3-way and 4-way systems often comes down to cost, the performance level that your client desires,
02:22
and sometimes room size with the largest room requiring a larger, more powerful, and more versatile option.
02:30
So let’s take a look at an example, the SC 424 uses the LF-4215 low frequency cabinet, from our highest performing low frequency series,
02:41
it has 2 woofers, and is a 4-way loudspeaker system.
02:45
Some model names also have additional digits at the end that denote a special feature.
02:50
A “C” at the end indicates a revision, for example the SC 323C has been updated twice since its launch.
02:59
“F” stands for Flown and denotes a model designed for safe suspension.
03:05
“8” means this model uses an eight ohm version of the LF cabinet, for example -- the SC 424-8F has an 8 ohm LF and is a “Flying” version of the standard SC 424.
03:18
“X “denotes a loudspeaker with a crossover that can be used for fully passive operation.
03:24
We’ve got a few models that don’t fall under this naming convention, so before we spotlight the others let’s take a quick look at them.
03:32
The SC 1120 has a single 12 inch woofer and the SC 1150 a single 15 inch.
03:39
Both are passive 2-way systems and interestingly have a depth of just under 12 inches which is a huge benefit if space behind the screen is limited.
03:50
Another model with a different naming convention is our Reference Monitor System 4-way loudspeaker with a dual 12 inch subwoofer,
03:58
which is only sold as part of a complete system with matched DCA power amplifiers and a Q-SYS Core for signal routing and processing.
04:08
This is a high performance system most frequently used in critical listening applications like post-production facilities,
04:16
screening rooms, recording studios, or in high end home theatres.
04:22
Now, we’ll move up the screen channel product line starting with our single-woofer models.
04:27
And… we’re going to just look at the basic stats of these speakers in this video,
04:32
but in the next video we’ll talk about how to determine which one is right for your application.
04:39
The SC-413C is a three-way loudspeaker with 1 15 inch woofer.
04:45
The SC-414 is the same except 4-way.
04:49
The next set of loudspeakers are our most popular format.
04:52
They each include two 15 inch woofers, a cone midrange driver, and high frequency compression drivers.
05:00
Our catalog includes FIVE models that have this same form factor, so they all look the same.
05:05
The difference is what you can’t easily see, the low frequency woofers and their power handling, and the type of compression drivers in the mid and high frequency sections.
05:17
The SC 223, 223X passive, 323C, and 423C are all 3-way systems.
05:27
Note that the SC-223X is selectable, passive or bi-amp.
05:33
The SC-324 and 424 are both 4-way.
05:37
And the difference again here, is the higher power “4000 Series” low frequency drivers and the coaxial High and Very high frequency driver.
05:47
Our 3 woofer models include the SC-433C, a 3-way model and the SC-434. A four-way model.
05:57
Likewise, our 4-woofer models come in both 3 and 4-way versions also, the SC-443 and 444.
06:06
This is the largest system we offer, which can accommodate the largest premium cinemas with the best possible high performance sound.
06:15
It is simply, the finest big room system available.
06:19
As you can see, we’ve got lots of options in the area of screen channel loudspeakers.
06:24
If you want to look through more specs and learn more about the models that might be best for your application,
06:29
take a look in our Links and Downloads section for some spec sheets and comparison charts.
06:35
One of the special features of many QSC loudspeakers is Directivity Matched Transition, or DMT.
06:42
Many loudspeaker designs pretend that only the high frequency horn coverage matters.
06:48
In reality, a smooth, directional transition from woofer to horn is critical to achieving smooth, even coverage.
06:56
QSC’s DMT technology matches the high-frequency coverage angle to the coverage angle of the woofer and the result is smooth,
07:05
even coverage at all frequencies throughout the listening area.
07:10
Another unique QSC technology is called Intrinsic Correction.
07:14
Intrinsic Correction helps to minimize the amount of on-site room-tuning that’s usually required,
07:20
because most of the response anomalies have been corrected before they’re ever installed.
07:26
We take thousands of measurements to create settings for each of our loudspeakers and the settings are applied in the Cinema processor or within Q-SYS.
07:36
We’ve combined a lot of innovations into the low-frequency sections of our screen channel loudspeakers too,
07:42
many of which have been emulated by other manufacturers.
07:45
For example: Single Woofer Chambers produce a stronger box, and preserves proper loading in the very unlikely event that one driver fails.
07:55
Symmetrical Port Loading prevents the cone from rocking at high output levels.
08:01
Close Coupled Woofers means our woofer placement is optimized for mutual coupling and an increased vertical coverage pattern.
08:10
We use Large Fully Radiused Ports both internally and externally, to reduce audible port turbulence.
08:18
Security screws that help prevent driver theft – Yep, that’s a thing.
08:24
And Pre-installed rubber feet to prevent your sub from taking a walk when the going gets tough.
08:30
Another feature that’s visually obvious when you look at our screen channels is the axisymmetrical horn design.
08:37
The most natural sounding horns avoid parallel surfaces and abrupt changes in their contour.
08:44
This Axisymmetrical horn design results in a coverage pattern that ensures that all listeners hear the same sound,
08:51
everywhere, from the front of the room to the last row in the back.
08:55
Combining this horn design with our convergent aiming design let’s us really optimize their coverage.
09:03
Typical solutions for 3 and 4-way systems is to add devices on top of each other.
09:09
This “stacking” is okay for low frequencies but High frequencies need more precision.
09:15
Proper Time alignment is critical because when a loudspeaker is too tall this alignment can become less uniform.
09:22
It smears the audio, and you get “comb filters” and reduced intelligibility.
09:28
QSC has solved this problem with the use of our patented Coaxial Driver Technology.
09:34
It improves time alignment and eliminates Comb filtering,
09:38
and reduces the height for better stereo imaging and as a result, provides better intelligibility.
09:44
We have a pan-tilt mechanism for mid-high components that makes quick work of assembling and aligning screen channel systems.
09:52
The mechanism is labeled for repeatability and features a notched tilt adjustment to maintain vertical alignment.
10:00
And the last feature I want to mention for now is CineSight™.
10:04
It’s our patented, integrated sight in our mid-high components that allows fast and accurate aiming of your loudspeakers. Pretty cool huh?
10:13
Now let’s talk about Surrounds, shall we?
10:16
We have three models that feature 8” drivers, three with 10- inch drivers, a then a 12 inch and a 15 inch model.
10:24
All are 2-way loudspeakers, and they differ in their power and sensitivity ratings among other things like shape and size.
10:32
Our 8 inch models are the SR 800, 8101, and 8200 and range from 125 to 200 watts.
10:42
Our 10 inch models are the SR-1000, 1020 and 1030 and range from 150 to 400 watts.
10:51
The next three-models are high power surrounds that are especially suited for immersive sound installations like Dolby Atmos or DTS:X.
11:01
They’re made of high-strength plywood and feature special suspension points that make them safe and easy to install and aim, even in locations that are overhead.
11:12
The SR-1290, the SR-1590, and the largest, most powerful surround loudspeaker, the SR-5152.
11:22
This model can actually also serve as a screen channel in smaller applications.
11:28
All of our surround loudspeakers, except the SR-5152, are packaged with pre-installed Brackets that make installation easy.
11:38
To round out our loudspeaker portfolio let’s get the LOW DOWN on subwoofers. Sorry, dad joke. Anyway…
11:46
Our subwoofer portfolio features single and dual 18-inch woofer models in a variety of power ratings.
11:54
As well as the impressive SB-15121 which uses a single 21 inch woofer to earn its 2500 watt power rating
12:04
and has a frequency range that extends even below 25 Hz without the need for B6 EQ filters.
12:12
The SB-15121 is used in applications where only the very highest performance will do.
12:20
Wrapping up the product catalog are our Accessibility solutions and Test and Measurement tools.
12:26
Our UPC Series packages include an Emitter panel, which is an infrared-based transmitter that delivers sound for hearing and visually impaired moviegoers,
12:37
and also comes with mounting brackets, a power supply and signage to let your patrons know these products are available for their use in your venue.
12:45
We also offer caption receivers with various seat-arm and cupholder mounting options.
12:52
And Assistive listening headphones that play the film’s soundtrack or narrated audio description for visually impaired patrons.
13:01
For test and measurement, the LSS-200 light and sound sensor measures C-weighted sound pressure level,
13:09
luminance, chromaticity, correlated color temperature, and audio/video synchronization.
13:15
The LSS-200 makes all of these measurements available on a web interface, and by posting data to a remote web server for analysis and display.
13:26
Well, that’s our cinema product catalog at 10k feet.
13:31
Don’t forget to check out the Links and Downloads section for more details on the products that interest you,
13:37
and you can also find more information on all of our cinema products at qsc.com/cinema.
13:47
Well that's about it for Products - thanks for watching. Come back for more when you're ready.

Lesson Description

Gain an understanding of QSC's cinema loudspeaker, accessibility, and test & measurement portfolio and the innovative technologies behind them.