In the beginning of 2014, Lectrosonics teased their upcoming “wide tuning” wireless product line: The L-Series.
Now available, this family consists of the LR, a compact receiver with dual antenna diversity built for on-camera simplicity, the LT, a compact transmitter with selectable RF output and multi-function switching, and the LMb, an economical transmitter designed for a wide variety of applications.
This new trio supplements Lectrosonics’ existing ENG product families, such as their Digital Hybrid, IFB, or Handheld models, all with full backwards compatibility. With four multi-block configurations to choose from, each with around 75 MHz of frequency tuning range, the L-Series provides audio and video professionals with more flexibility, while retaining the front-end tracking, signal processing clarity, and build quality that Lectrosonics is known for worldwide.
Over the months, we put the L-Series to the test, in all kinds of productions and environments.
Here’s what we found:
More blocks, less headaches
First and foremost, L-Series products and kits come in four different triple-block frequency bands, codenamed A1-D1:
- A1 (470, 19, 20) 470.100 – 537.575 MHz
- B1 (21, 22, 23) 537.600 – 614.375 MHz
- C1 (24, 25, 26) 614.400 – 691.175 MHz
- D1 (27, 28, 29) 691.200 – 767.975 MHz [export]
New users will enjoy more RF flexibility to work with on the go, while current owners will appreciate more compatibility with their existing Lectrosonics hardware. So whether you need wireless for talent (typically in the lower blocks), or for IFB/secondary transmission (typically higher), you can choose the right set for your needs. Each product comes with antennae that have an appropriate length between three blocks.
Despite manufacturers like WisyCom developing products that can utilize more than 200 MHz of UHF, Lectrosonics claims it chose to divide the block system to ensure the L-series could retain all of its “Digital Hybrid” and other processing effectively, while keeping power consumption to a minimum. With 25 kHz tuning steps, users could potentially fit more transmitter frequencies within bands in danger of being steadily reduced by the FCC.
Even if you already own other Lectrosonics hardware, investing in a wide tuning L-series can come in handy:
- LR & LT/LMb as a powerful duo for direct to camera or ENG wireless audio
- LR as an on-camera receiver with multiple transmitter compatibility modes
- An LT transmitter with remote antenna, compatible with three blocks of IFB/hops
- Multi-block transmitter options without switching/re-allocating Venue modules
- The LMb as an adaptable, economical transmitter with Lectrosonics quality
- A multi-block kit that’s equally or less priced than a 411/SMQV combo …
There’s a lot more features to explore. Let’s dig in:
LR — simple & powerful
The first element you’ll notice about the LR is its new LCD display & interface. Similar to Lectro’s Quadra IEM display, the LR provides more information upfront about signal strength, tuning, and metering. The screen is large enough to see important details at a glance, it has a backlight auto-off timer, and its two-tone screen colors can be inverted for better visibility outdoors.
Unlike their other receivers, the LR’s controls are front-facing for easy on-camera access. Around the display are Menu/Select, Back, Power (multi-function), and Up/Down membrane buttons, along with RF and battery indicator LED’s. The top of the LR has two SMA ports for removable antennae (included), an IR port for easy sync with L-series transmitters, and a TA3 audio output port.
The LR’s right panel has a microUSB port for factory access and future firmware updates, which will be available directly to consumers without extra hardware. This same port is also on the LT transmitter, and covered by a rubber cap when not in use. The LR, LT, and LMb are powered by two AA batteries, as Lectrosonics moves away from the more expensive and less international friendly 9V battery for their future products.
SmartTune, a feature of Lectro’s Venue systems, is also incorporated into the LR. With a few button presses, the LR scans across a whole multi-block band (i.e. A1), or individual blocks themselves (470/19/20), and automatically selects the best channel. After that, the IR Sync immediately and wirelessly pairs it with either the LT or LMb.
The L-Series is tunable at either 100 kHz or 25 kHz steps, allowing for even more flexibility within a multi-block band. This receiver can seamlessly connect with Lectro’s current Digital Hybrid models, former 100 200 & 300 series, IFB products, and Modes 6 & 7 for the best compatibility. Additionally, you have your usual audio output, 1 kHz tone, battery telemetry, and polarity options.
With it’s machined build, the LR feels like it can take a beating, while staying lightweight at 7.3 oz (207g, with batteries). When purchased along with a Kit, the LR comes with a TA3-XLR male cable, a TA3-mini TRS cable for prosumer/DSLR input, removable belt clip, hotshoe mount, and carrying case.
LT — one transmitter, many uses
Slightly larger and heavier than an SMQV, the LT is a multi-block transmitter designed for multiple uses, and built for the rigors of production. The LT is a blend between UM and SM transmitters, with its removable antenna, Digital Hybrid, AA battery power, and up to 100 mW of transmission output. It also has the same display as the HH handheld transmitter, and conductive aluminum casing as the LR.
The sync ports on the LT & LMb seem to be passive, and are only activated when the LR enables the IR Sync mode. Similar to the SM series, the LT can also be configured remotely with “dweedle” tones from an RM Remote or LectroRM mobile app, however the LMb does not have this functionality.
On top, there’s a TA5 microphone input and level indicator LEDs, removable SMA antenna, and a multi-function power switch. Featured on both the LT & LMb, this switch can be configured for power, mute or talkback, making them also useful for live events or sports. When the switch is engaged for mute or talkback, the indicator LEDs turn a blue color, and messages flash on the LCD display.
The main menu on the LT features all the usual functions Lectrosonics users are accustomed to — Gain, Channel, Low Frequency Rolloff, Series Compatibility, Setting Lock, Remote Enable, and Tx Output Power. Some new features are the LT’s switchable Line-in level, which when in “Instrument” mode, delivers 1 megOhm of input for musical instruments with passive pickups. Phase can also be inverted transmitter-end, and battery telemetry can be reported as either Alkaline or Lithium voltages.
The removable belt clips included with the LR and LT are heavy duty, curved for better grip, and allow enough space to dress excess cabling if needed.
LMb — it gets the job done
“Hey, whats the difference between the LT and LMb?”
LT |
LMb |
|
| Three-block Bandwidth | Yes | Yes |
| Tuning Steps | 25 or 100 kHz | 25 or 100 kHz |
| Multi-Function Top Switch | Yes | Yes |
| Switchable Compatibility | Yes | Yes |
| IR Sync | Yes | Yes |
| Removable Antenna | Yes | No |
| RM Remote / LectroRM Control | Yes | No |
| Line-in MOhm option | Yes | No |
| Power Output | 50 or 100 mW | 50 mW only |
| Battery Power | 2x AA | 2x AA |
| Case Build | Machined Billet Aluminum | Aluminum Outer Shell |
| Weight | 5.9 oz | 5 oz |
| Price (USA, June ‘15) | ~ $1200 USD | ~ $800 USD |
Like the LMa, the LMb is a fixed-antenna 50 mW transmitter with Digital Hybrid, now with triple blocks of tuning at 25 or 100 kHz steps. It also shares the new multi-function switch as the LT, and IR sync for quick setup. The LMb has most of the menu options on the LT, with the exception of Remote control, and switchable Line-in Level.
The L-Series is coated with an electroless nickel plating, codenamed “EBENI”, that renders a tough and conductive surface that is scratch and corrosion resistant. Thanks to its conductive plating, sensitive components don’t need to be re-machined to accommodate for powder or anodized finishes, so Lectrosonics will be embracing this process for future products ahead.
While the LR and LT bodies are machined billet, essentially carved out of solid aluminum and therefore much more heavier duty, the LMb is housed in the same outer extruded aluminum shell as the LMa, with EbNi plating instead of powder coating.
Available for roughly $800, the LMb is a versatile yet cost effective model for those who have simple workflows, and may not need the extra features or output power of the LT.
Out in the field
Whether you’re using an LR/LT or an LR/LMb setup, they’re both very impressive combos. In under a minute, the best frequency within your band is automatically selected, gets synced to the transmitter, then the on-camera subject is wired up and ready to go.
Check out this video of setting up the LR and other features:
I could also make a video that demonstrates sound quality, but if you’ve ever used Lectrosonics Digital Hybrid products, then it will be a familiar experience. Think of it as a 411 and SM combo, in terms of how they sound. Instead, here’s some notes from the field:
The L-Series, as a whole, performs well in any weather, even in locations with high humidity. Under direct sunlight, the LR’s display does become slightly difficult to read, although its inverted display color setting helps. The included hot shoe adapter makes it easy to mount the LR onto a DSLR or camcorder, with all controls readily accessible.
The LT becomes quite warm to the touch when transmitting at 100 mW, similar to an SMQV broadcasting at max output. This may cause some discomfort to the wearer, especially if the LT is clipped inwards of the belt line or tucked into a neoprene strap to minimize visibility.
We also rented a PA system with an LR and LMb to a motivational speaker for a week. With basic experience, she was able to setup and operate the L-Series for live seminars, and appreciated the mute switch function when having private conversations with clients.
In the Greater Los Angeles area, there are pockets of RF congested areas, such as the Hollywood Hills, Griffith and Elysium Parks, Downtown L.A. Live. In all of these locations, there was still a reduction in range, however the LR/LT pair seemed to hold onto its signal without dropouts longer than a 411/SM combo.
At RF-heavy Las Vegas conventions like CES or NAB Show, it was still tough at times to find open frequencies. The L-Series at least allowed me to fine-tune on 25 kHz steps, potentially avoiding other surrounding wireless systems. With the LT broadcasting at 100 mW, I could easily pick up on-camera talent up to 35 feet away without issue.
Our camera owner/operator buddies seem to enjoy the L-Series’ simplicity, and is likely to be a popular rental item for “lone wolf” videographers and journalists. However, the general consensus among location sound mixers is the need for a top-facing receiver that is more accessible within a bag (more about that later in this review).
Hours of Power
One of the most heated arguments about ENG wireless equipment is battery life — so we performed a handful of “real-ish world” tests in controlled yet realistic conditions.
An LR sending a line-level signal to camera is positioned about 20 feet away from the subject, who is wearing either an LT or LMb on the belt clip, positioned at the small of the back. A connected Sanken COS-11D mic is kept open at normal gain, Smart NR is set to at “Normal”, LCD backlights are auto-off, and all devices remain powered on until they shut down. The tests are repeated three times, and take place outdoors in weather ranging from 70-75°F (21-24°C) in nominal humidity, away from direct sunlight.
We’ll load each device with two popular AA models available in the Hollywood market: Duracell’s Procell Alkaline and Energizer Ultimate Lithium. Just for kicks, we also tried a brand-new conditioned pack of Panasonic Eneloop Pro NiMH rechargeables, rated at 2400 mAh max.
LR – Battery Life, 3 Test Average
| Data Sheet Rating | “4 hours (Alkaline)” |
| Duracell Procell | 3.5 hours |
| Energizer Ultimate | 5.75 hours |
| Eneloop Pro 2400 | 4.5 hours |
LT – Battery Life, 3 Test Average
| Data Sheet Ratings | “4.75 hours (Alkaline), 5.5 hours (NiMH)” | |
| Tx Power Output | 50 mW | 100 mW |
| Duracell Procell | 4.5 hours | 3.5 hours |
| Energizer Ultimate | 7.75 hrs | 7 hours |
| Eneloop Pro 2400 | 6.25 hours | 5 hours |
LMb – Battery Life, 3 Test Average
| Data Sheet Ratings | “4 hours (Alkaline), 8 hours (NiMH)” |
| Duracell Procell | 6.25 hours |
| Energizer Ultimate | 10.75 hours |
| Eneloop Pro 2400 | 7.5 hours |
So with a L-series combo powered on throughout a whole 10 hour work day, be prepared to swap batteries once or twice, regardless of type. To recap:
- The LR may require the most battery replacements throughout the day
- The LT’s 50 mW and 100 mW modes have about a 1 hour difference
- The LMb seems to be the most power efficient of the bunch
There are more variables when you’re out on location, such as environmental factors, surrounding RF congestion, high usage of DSP, even a bad set of batteries. Rechargeable battery performance can also widely vary, so the LR also has a battery timer mode to keep track of your setup. Although we didn’t log exact runtimes while out on productions, each day came pretty close to the “control” results above. Also, there are no “battery eliminator” or alternate powering options for these products.
All in the family
The L-Series doesn’t mean Lectrosonics’ current or former product families are obsolete. It builds bridges between them with full compatibility, and creates new ways for owners to expand their investments.
Having three blocks with 25 kHz tuning steps means more frequencies with better performance at 100 mW output. But in situations where you absolutely need that extra push to 250 mW, the SMV/SMQV are still dependable and powerful options. The LR can be a standalone flexible receiver for existing transmitter setups, and the LMb can be a viable upgrade for those looking to save some cash.
Lectrosonics will undoubtedly continue the triple-block feature for their upcoming products. The new SSM, its smallest beltpack transmitter yet, is built for controlled theatrical use with more bandwidth, and is available soon at major retailers.
Back in October 2014, during the Sound Summit LA event, the Fanatics also hinted at a triple-block, top-facing, dual channel ENG receiver in development — let’s call it the “SRc” or “LRc”. While slot-loading receiver ports in cameras are being phased away, this form factor is still the most popular for sound pros who work mobily. Sound Devices’ SuperSlot platform could also breathe new life into these receivers, for more visibility and control directly from the mixer/recorder.
Wrap Up
Hopefully this should give you enough perspective to decide if the L-Series, as a kit or individually, could be beneficial for your workflow. Even if you’re content with your current wireless hardware, the L-Series is a sign of where Lectrosonics is heading for their products ahead.
Whether you’re a video journalist, a location sound professional, or a veteran in the biz, the L-Series makes Lectrosonics quality available for all.
Questions? Comments? Suggestions for future reviews? Drop us a line on our contact page.
Thanks for reading! Special thanks to Karl Winkler at Lectrosonics Inc.