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Product Parameters and Specifications Model: Legatia L8 Midwoofer/Midbass/Midrange
Legatia™ L8 The Legatia™ L8 is a triumph for Hybrid Audio Technologies, as we once again bring a product to the high-end car audio community that is needed and desired by enthusiasts, competitors, and installers. The L8 was specifically built to give an up-front subwoofer option for doors, floor boards, and kick panels. We designed this driver so that, in the right installation, there would be no necessity for additional, larger subwoofers in an audiophile system played at reference levels. Equally as important, the L8 was also designed to give an option for a true 2-way front stage system using the L8 midbass with either the Legatia L4 wide-bandwidth midrange or the Legatia L1 Pro tweeter.
Figure 1: L8 midwoofer
Legatia L8 in more detail The Legatia L8 is a 215mm (8.5-inch) midwoofer that doubles as a midbass and midrange driver to compliment dedicated two-, three-, or four-way front stage system designs. Like the Legatia L6 midbass, the Legatia L8 is a cone-type driver consisting of a treated pressed paper diaphragm with low moving mass for fast, transient response. The cone design offers a wide dispersion pattern to make for flexible installation and speaker location. Some may decide to relegate the L8 to strict midbass and upper subbass duties in a three- or four-way front stage, while others will venture into a true two-way front stage using L1 Pro tweeters, or coupled with Legatia L4’s running “all pass.” Like other Legatia midrange and midbass designs, you will find no composite or metal cone materials used on the L8. The purpose for this design philosophy is to ensure a light moving mass cone, and optimized Qms for door, floor-board, and kick panel mounting, to ensure solid bottom-octave extension without the need for a sealed enclosure. The light cone further helps to make the L8 a transiently “fast” driver which accurately reproduces complex musical passages with ease. Rounding out the face of the driver is an inverted high-loss rubber surround that, in concert with the spider, provides the compliance needed for the L8 to adequately and authoritatively present a real sense of “bass up front” in two- and three-way front stage systems, or the front-stage midbass reinforcement to a dedicated subwoofer system. Additionally, the L8 lends itself well in the role as the dedicated midwoofer/subwoofer for trunk mounting/rear deck, rear quarter panels, etc. in three- and four-way systems. Note: specifications are subject to change without notice Copyright © Hybrid Audio Technologies, LLC. All Rights Reserved.
Product Parameters and Specifications Model: Legatia L8 Midwoofer/Midbass/Midrange
The basket is a high-quality cast aluminum design, and contains a 215mm wide flange providing for the mounting of the driver via four screw holes (the use of 4mm – 5mm cap head screws is ideal). The overall dimensions of the driver are very amenable for use in the car audio environment, boasting a depth of just 92mm for the ultimate in mounting flexibility. The terminations are springloaded binding posts to optimize contact, and give the end user flexibility in tinned wire or binding post terminations. Mechanical and electrical parameters are amenable to a variety of different installations and speaker locations. The high Qts and low Mms of the driver will allow it to be used in a purely infinite baffle configuration. Hybrid Audio and select Team Hybrids competitors have also had great success using this driver in larger vented enclosures, folded horns and transmission lines. It is important to note that sealed enclosures are not required; in fact, the L8 works optimally in areas where a large volume of area is available, such as in kick panel, floor boards, or foot wells, underneath dashboards, etc. You do not have to build enclosures for the L8 to perform as intended; a simple baffle, securely attached to the car’s chassis with available airspace at the rear of the baffle is all that is required; this driver quickly solves the universal installation quandary of having to build enclosures for car stereo speakers. Finally, the size of the unit allows it to be mounted in typical locations within a vehicle, including kick panels, floor boards, and door panels, as long as there is adequate airspace behind the driver to allow it to maintain proper damping and acoustic suspension. The Legatia L8 is precisely what the car audiophile wants in a small format midwoofer, that doubles as a midbass and midrange, and is small enough to place virtually anywhere, but robust enough for the most discerning bass aficionados. At home in virtually any arrangement, the L8 is Hybrid Audio’s flagship woofer driver, boasting exceptional performance and a design philosophy that goes hand in hand with true high-fidelity playback.
Note: specifications are subject to change without notice Copyright © Hybrid Audio Technologies, LLC. All Rights Reserved.
Product Parameters and Specifications Model: Legatia L8 Midwoofer/Midbass/Midrange
Legatia L8 Thiele-Small Parameters Overall Diameter
φ215 mm (8.5-inch)
Mounting Depth
92 mm
Bolt Circle Diameter
φ195 mm
Mounting Hole
φ185 mm
Recommended Minimum Crossover Frequency
40 Hz at 24 dB/octave highpass
Pnom Rated Power Input (No Crossover)
75 watts (AES Standard)
Pmax Rated Power Input (No Crossover)
150 watts (AES Standard)
Pmax (With Recommended Minimum Crossover)
200 watts
Frequency Range
40 Hz – 2,500 Hz, +/- 3 dB
Sensitivity
88 dB at 1 watt/1meter
Mms
31.5 g
Cms
454 um/N
BL
5.99 T*m
Voice Coil Diameter
35.55 mm (1.4-inch)
Impedance
4Ω
DC Resistance
3.4 Ω
Fs
40 Hz (free air)
Qms
7.35
Qes
0.693
Qts
0.765
Xmax
8.5 mm (one way)
Vas
26 L
Sd
0.02 m2
Note: specifications are subject to change without notice Copyright © Hybrid Audio Technologies, LLC. All Rights Reserved.
Product Parameters and Specifications Model: Legatia L8 Midwoofer/Midbass/Midrange
Legatia L8 Impedance and SPL Verses Frequency Plots
Note: specifications are subject to change without notice Copyright © Hybrid Audio Technologies, LLC. All Rights Reserved.
Product Parameters and Specifications Model: Legatia L1 Pro Special Edition Tweeter
Legatia Pro™ L1 Special Edition The Legatia Pro L1 SE is a limited-edition, super high-end mobile audio tweeter based upon the architecture of the original and highly-acclaimed Hybrid Audio Technologies Legatia L1 Pro transducer. At the onset of the Legatia Pro-Series program, we wanted to be sure that the Pro-Series tweeter could be listened to for long listening sessions with no noticeable listener fatigue, and the Pro L1 answered the call. The Pro L1 SE is an advancement of the original Legatia L1 Pro design, boasting a radiator ring diaphragm for exceptional polar response and an even broader frequency response, and lower resonance frequency than the original L1 Pro. The Legatia Pro L1 SE is ring radiator tweeter that has superior damping and extended frequency response. The Pro L1 SE is a light and transiently fast tweeter in a 25mm body that doesn’t suffer from typical “heaviness” in tonal quality, typically associated with damped, large-diameter dome tweeters; the L1 Pro SE can be used for the reproduction of upper midrange and treble frequencies in dedicated two-, three-, and four-way front stage systems. The Pro L1 SE has exceptional polar response, and remains small enough to install in typical locations within a vehicular environment. The Pro L1 SE is the new benchmark for radiator ring diaphragm tweeters.
Figure 1: Pro L1 SE tweeter, shown larger than actual size for detail.
Note: specifications are subject to change without notice Copyright © Hybrid Audio Technologies, Inc. All Rights Reserved.
Product Parameters and Specifications Model: Legatia L1 Pro Special Edition Tweeter
Legatia Pro L1 SE in more detail The Legatia Pro L1 SE is a 25mm (1-inch) ring radiator-type tweeter which has an extended linear response and exceptional transient response. The design offers a wide dispersion pattern to make for flexible on- and off-axis installation and speaker location. The L1 Pro SE has several unique features that ensure performance is superior to all other designs in this category. The ring radiator geometry is notorious for delivering a flat, extended response, but many radiator designs have suffered historically from poor off-axis response. The main L1 Pro SE criteria was to have a ring radiator that could work exceptionally well in a car environment, with an end-user’s choice of either on- or off-axis operation with good polar response. The geometry of the wave guide was paramount to achieving this result and was the subject of a concerted effort by Hybrid Audio Technologies engineers. The wave guide also prevents phase cancellation for uniform frequency response and uniform polar radiation. The addition of the wave guide is an improvement over a conventional dome tweeter design simply for the fact that the diaphragm is terminated not only at its edges, but also at the center of the diaphragm as well. This feature improves the damping of modal distortion and resonance. In concert with the wave guide is a treated fine cloth diaphragm to ensure smooth frequency response. The Pro L1 SE is efficient, exhibits low distortion, and has a wide dispersion; the L1 Pro SE has a slightly heavier moving mass than the L1 Pro, which in turn has afforded more damping character, while the resonance has been lowered by 120 Hz over the L1 Pro (580 Hz). Nominal and thermal power handling has also been improved over the original L1 Pro transducer; the Pro SE tweeter has a very high power handling with proper filtering, and the L1 Pro SE diaphragm is much less susceptible to mechanical deformation than other designs, and yet yields a smooth response over the extent of its range. The motor assembly is conventional dynamic, with a φ24.5 × 3.5 H NdFeB neodymium magnet structure to ensure a relatively small footprint size and shallow depth. A perforated grille protects the diaphragm and ring. The Pro L1 SE boasts a fully machined aluminum body; the body is machined aluminum, not process-cast aluminum. The dense metal structure of the tweeter housing helps to reduce resonances within the body of the tweeter to abate resonance, and ensure effective reproduction of extremely low music tones. Additionally, the Pro L1 SE has a polypropylene tuned and damped chamber at the rear of the motor assembly; the chamber helps to reduce backwave distortion and significantly lower the tweeter’s resonance frequency to allow it to be used to play tones in the vocal spectrum, if desired. A machined aluminum 46mm knurled accoutrement (denoted as “aluminum adapter” in Figure 2) at the base of the tweeter provides optimized clamping strength to the mounting media. The Pro L1 SE tweeter is available in two colors to ensure cosmetic integration with the vehicle’s surroundings: silver brushed aluminum, and anodized black (there is no cost difference between the two colors) with copper phase plug and radiator ring. The 58mm wide mounting flange, only 3mm larger than the Legatia L1V2 tweeter, provides a solid-aluminum mounting surface for the tweeter without the necessity of mounting cups or external hardware.
Figure 2: Pro L1 SE tweeter mounting accoutrement – detailed view of aluminum 46mm knurled aluminum adapter
Note: specifications are subject to change without notice Copyright © Hybrid Audio Technologies, Inc. All Rights Reserved.
Product Parameters and Specifications Model: Legatia L1 Pro Special Edition Tweeter
The overall dimensions of the driver are very amenable for use in the car audio environment, boasting an exceptional depth of just 28mm (nearly unheard of in a tuned-chamber tweeter). The terminations are an extraordinary feature of the Pro L1 SE: nickel-plated spring-loaded binding posts were used to give the end-user flexibility in direct connection with large-gauge tinned wiring, without the need for crimp terminations.
Limited Edition Statement The Legatia L1 Pro Special Edition is a first-generation limited edition radiator ring transducer. Hybrid Audio Technologies guarantees a maximum number of Legatia L1 Pro Special Edition transducer sets that will be created within this edition. The maximum number is 150 sets. Included with the Legatia L1 Pro SE set is a Statement of Authenticity, which includes an original signature by Hybrid Audio Technologies Founder and Chief Executive Officer Scott E. Buwalda. Included with the signature guarantee is a certification that the limited edition Legatia L1 Pro Special Edition transducer program, which included design, prototyping, testing, manufacturing, and packaging, was performed by the Hybrid Audio Technologies Founder, or in his direct supervision, and includes a statement of personal inspection of the transducers. The final feature of the Pro SE tweeter is the Special Edition logo on the tuned chamber:
Figure 3: Pro L1 SE tweeter – “Special Edition” tuned chamber, for reference
Note: specifications are subject to change without notice Copyright © Hybrid Audio Technologies, Inc. All Rights Reserved.
Product Parameters and Specifications Model: Legatia L1 Pro Special Edition Tweeter
Reference Figure 4, below, for the mechanical drawing of the Pro L1 tweeter.
Figure 4: Pro L1 SE tweeter – dimensioned mechanical drawing
Note: specifications are subject to change without notice Copyright © Hybrid Audio Technologies, Inc. All Rights Reserved.
Product Parameters and Specifications Model: Legatia L1 Pro Special Edition Tweeter
Legatia Pro™ L1 SE Thiele-Small Parameters Overall Diameter
φ58mm
Mounting Depth
30.5 mm from bottom of surface-mount flange
Mounting Methodology
Surface-mount tweeter with standard-pitch M46 X 8mm thick knurled thread aluminum adapter to secure the tweeter body from the rear Solid machined aluminum with polypropylene tuning chamber
Construction Distortion
<5% max at rated power input, no crossover
Magnet Diameter and Construction
φ24.5 × 3.5 H NdFeB
Recommended Minimum Crossover Frequency
1,800 Hz at 24 dB/octave highpass (conservative)
Pnom: Rated Power Input (No Crossover)
25 watts (AES Standard)
Pmax: Maximum Power Input (No Crossover)
50 watts (AES Standard)
Pmax: (With Recommended Minimum Crossover)
125 watts
Resonance Frequency (Fs)
580 Hz
Frequency Range
Fs (580 Hz) – 40,000 Hz, +/- 3 dB
Sensivity
91.5 dB at 1 watt/1 meter
Nominal Impedance
4Ω
DC Resistance
3.0Ω
Voice Coil Diameter
25mm (1-inch)
Q Mechanical System (Qms)
1.244
Q Electrical System (Qes)
1.717
Q Total System (Qts)
0.721
Krm
3.048 µΩ
Erm
1.001
Kxm
4.314 mH
Exm
0.409
Note: specifications are subject to change without notice Copyright © Hybrid Audio Technologies, Inc. All Rights Reserved.
Product Parameters and Specifications Model: Legatia L1 Pro Special Edition Tweeter
Legatia Pro™ L1 Impedance and SPL Verses Frequency Plots
Note: specifications are subject to change without notice Copyright © Hybrid Audio Technologies, Inc. All Rights Reserved.
Product Parameters and Specifications Model: Legatia L1 Pro Special Edition Tweeter
Annex 1: Legatia Pro™ L1 3-Dimension Design Drawings
Note: specifications are subject to change without notice Copyright © Hybrid Audio Technologies, Inc. All Rights Reserved.