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