Comprehensive evaluation of twelve sets of European and American famous home theater speakers (1)

Published: 2004-12-22 20:04:18 original author: Wang Jie

With the rapid development of home theaters and their popularity, the demand for AV products has become an inevitable trend. As a result, different market positioning and various grades of various audio and video products are presented in front of us. The quality of the product has become the focus that audio and video lovers want to understand, and the personality and style of the product have begun to pay attention to the audio and video lovers. Diversified needs and diversified products constitute a wonderful and rich audio-visual world.

The speaker, the most important part of the sound part in the home theater system, is directly related to the level of sound effect restoration, and has always been the focus of audio and video lovers in choosing equipment. In order to obtain a satisfactory theater effect, the speaker part cannot be ignored and is absolutely crucial. To this end, we organized this evaluation, hoping to help readers solve practical problems in speaker selection.

The products evaluated this time are located in the well-known foreign mainstream and classic speaker brands that have many years of brand history. They are mainly based on new models and new systems that can comprehensively reflect the strength of the brand. And individual style, can give readers a powerful reference.

This evaluation is based on the actual performance of theater performances, with music performance capabilities as a reference. Use dts, Dolby Digital test software and some video highlights, and use multiple music software reference audition.

The evaluation reference amplifiers include Pioneer VSX-AX10Ai, Mclntosh MHT200, Tianlong AVR-3805, YAMAHA RX-2400, CARY Cinema-6 / 7, Onkyo TX-NR901 and other models. The recommended part of the amplifier in the collocation recommendation column of the article is mainly based on the actual listening test results, and combined with the editing experience to give more recommendations, the purpose is to give readers a greater choice.

It should be emphasized that the brand and product model of the evaluation are selected by the editorial department, and some brands have failed to participate in the evaluation due to the current shortage in the domestic market or other reasons. The actual evaluated products are not only the 12 sets of equipment published in this article. Some products have to be deleted due to obvious quality defects or unsatisfactory sound performance. In other words, the 12 sets of equipment announced in this evaluation are all products recommended by the editorial department. However, there are obvious differences in sound style and personality between them, and the positioning of the consumer groups they face is also different. There are descriptions and recommendations in the text. Readers can carefully refer to and evaluate.

Through the analysis of evaluation performance, the following points can be drawn:

1. Sound quality is also important for home theater replay

Speakers that focus on sound design and perform well on music are equally satisfactory in terms of AV performance.

2. Center speaker is an important point that cannot be ignored in home theater

It expresses many important information such as human voice in the theater. It is the center of audio and video. The carefully designed and developed products will inevitably improve the overall effect.

3. Active subwoofer is indispensable

The shocking bass effect will be inferior to the main speaker alone, and it is difficult to reproduce the deep background sound and powerful sense of energy of the film. At the same time, the careful adjustment of the active subwoofer's phase, crossover point, and volume, including placement, will greatly improve the overall effect. This time the use of two types of active and subwoofers are used to comprehensively measure the level of the system.

4. Horn speakers and broadband speakers are the new highlights of home theater

This type of design is very beneficial to theater replay, and its open and natural sound has a very positive impact on the performance of theater sound. In fact, in professional theaters, horn sound reinforcement has a history of decades.

5. Speed ​​and detail performance are still the content that many speakers need to improve

The resolution is not high. The muddy water speaker may be used for "fever". It can be called personality and taste. When used in AV, it will lose many wonderful details and it is difficult to express a huge sound field.

6. Reasonable AV amplifier matching is a must

In addition to the matching between the sensitivity of the speaker and the power of the amplifier, there is a problem of complementary sound personality between the speaker and the amplifier. A good configuration can make the entire system play more fully.

7. The overall performance of the multi-channel is also the key to determine the actual listening effect

This requires that the sound characteristics of each speaker are highly consistent. At this point, the brands evaluated this time all attach great importance, indicating that the design of the cinema speaker system is mature.

We believe that film is art, and the home theater system is one of the effective tools to restore art. At this time, the quality of speakers and other related equipment has become an important link. Create the beauty of music, soundtrack and scenes, let the art truly show in front of us, fully express all emotions, whether it is joy, sorrow, or low, exciting, and shocking effects, this is the home theater Subtle.

Elegant, stylish, pure and elegant
TANNOY SENSYS DC series

â—Ž Configuration <br> Front speakers: SENSYS DC2 Rear speakers: SENSYS DC1
Center speaker: SENSYS DCC

Recommended with

Easy to drive and loose sound is a major advantage of the SENSYS DC series. There are no special requirements for the amplifier. The pure and transparent AV models are suitable. YAMAHA RX-V440, SONY TA-DB790, PIONEER VSA-AX5i, Yajun DivA AVR100, etc. can all respond well. At the same time, YAMAHA YST-SW1500 active subwoofer can be added to make it more adaptable and suitable for larger (within 50 square meters) space.

Brand background and product positioning

British Tianlang is a famous brand with a long history and full of vitality that is very rare in the audio industry. Since 1926, Tianlang has been attracting attention in the audio field, and coaxial technology is its biggest bright spot. Countless legendary famous items such as "Westminster", "Empire", GRF, "Stalin", etc. make Tianlang cherished as precious furniture and antiques. In recent years, Tianlang has begun to pay attention to the research of broadband technology, and the emergence of several super tweeters such as ST-200 and ST-50 has established Tianlang's position in the field of UHF.

The combination of Tianlang ’s classic coaxial technology and UHF R & D achievements, and launching at a price position suitable for the general consumer, is undoubtedly the biggest highlight of Tianlang ’s super sensory DC series. The DC1) speaker used as the main speaker can feel the charm of Tianlang coaxial and broadband in the theater system.

Technology and Design

The SENSYS DC series consists of 3 speakers-a DC2 floor box with 3 divisions and 4 units, a DC1 bookshelf box with 2 divisions and 3 units, and a DCC center speaker. The biggest difference from other speakers in appearance is that they have a There is only an elliptical super tweeter, and there is also a coaxial unit on the upper part of the box. Among them, the super tweeter uses a 25-micron titanium metal diaphragm, neodymium iron boron magnetic circuit system, frequency response up to 51KHz, and the coaxial unit is a combination of 175mm mixed fiber low-bass woofer and 25-micron titanium dome tweeter The DC2 floor box uses a 175mm hybrid fiber woofer to enhance low frequencies.

Why use broadband and coaxial technology? According to Tianlang ’s explanation: the coaxial can better simulate the point sound source, that is, the natural sounding method of the object, which can make the sound image more natural and more accurate positioning, and the broadband can reproduce the signal outside the upper limit of the human ear. And the phase shift in the audible frequency band is greatly reduced, thereby greatly improving the dynamics of the music, making the sound more realistic and the sense of speed stronger. Just like ordinary cars on highways, they also run more smoothly, and high-end cars also start on ordinary roads.

Music performance and theater effects

Open, bright, and well-developed, the sound is even and balanced and smooth, and the analysis and performance of details are fine, the lines are thin, the treble is light, and the voice is beautiful without losing the texture. The speed and impact are not bad, and it also has a good sense of low-frequency volume. It has a strong sense of scene and is suitable for use in an environment of 30 square meters. The sound is beautiful, and the fashion is stable and elegant.

For the white-collar people who have a fashion pursuit, emphasizing temperament and taste, audio-visual enthusiasts, SENSYS DC series is in the midst of thinking.

Open, stretched, strong, passionate interpretation of theater sound
Klipsch RF-35 series

â—Ž Configuration <br> Front speaker: RF-35
Rear speakers: RS-35
Center speaker: RC-35
Active subwoofer: RW-12

Recommended with

High efficiency and high sensitivity make the RF-35 series can easily obtain shocking sound effects, but high-quality AV amplifiers are essential. Maijingtu MHT200 AV amplifier is one of the first choice, Lexicon RV-8 is also a good match, pure and delicate amplifiers such as Marantz SR18EX, Pioneer VSX-AX10Ai can also be competent.

Brand background and product positioning

American Jieshi is famous in the industry for its production of HORN speakers and drivers. Founder Paul W. Klipsch began to develop the horn in 1934 to improve the efficiency of the speaker. At the same time, Klipsch has also made many technological breakthroughs in other fields of electroacoustics and won many awards, including the launch of the world's first set of THX certified multi-channel speakers System etc.

After more than 50 years of development (founded in 1946), Jesse still insists on the development of horn technology as the core, combined with various cutting-edge technologies to strive for perfect sound, in order to obtain the true effect of home theaters, it is very commendable. Under the current trend of AV becoming the mainstream of audio and video, Klipsch deserves more room for development.

RF-5 and RF-7 are Jieshi's civilian flagship products, RF-35, RF-15 and RF-25 are relatively popular models, RB series (bookcase type), Reference 5 system (mini type) are users Provides a variety of options. The Jess THX Ultra2 system is the largest theater system designed for professional theaters, and it can also target luxury individual users in theaters.

Technology and Design

The square-shaped horn and the golden mid-bass cone are the most unique scenery of Klipsch, and also a concentrated expression of its technology. RF-35 series speakers all use Klipsch's patented Tractrix horn tweeter and Cerametallic woofer, which is the highest-end unit of Klipsch.

Among them, the driver of the Tractrix horn tweeter is a 4.4cm voice coil, which uses an ultra-thin titanium diaphragm to provide detailed and accurate sound details, and the integrated horn with a diffuseness of 90 × 60 degrees is carefully designed by the computer , Can provide precise positioning and a wide sound field. Cerametallic bass is a ceramic aluminum metal composite unit, which has the advantages of super light, super hard and not easy to deform. At the same time, the good damping coefficient can make the sound reproduction clean, bright and powerful.

It is also worth mentioning that the RC-35 uses Tapered-Array technology in the middle, which can reduce the interference between the units and improve the clarity of the intermediate frequency. The RS-35 surround uses the WDST 180 degree diffusion technology and uses 2 horn units. The diffusivity of surround speakers is further improved, and the sense of surrounding is stronger. At the same time, the 12-inch RSW-12 active subwoofer has 1000W continuous output power, and the quality is extraordinary.

Music performance and theater effects

Open completely and stretch naturally. Theater speakers designed by theater masters have realistic sound and strong presence. The fierce scenes are hot and hot, and the details reproduce unusually. They are clear and sharp without losing their fullness, while they are clear and have a good sense of balance. The movement and dynamic scenes are quite adequate. The horn's advantages in theater performance are specifically reflected.

Simple sentiment, amorous voice
Jamo D450PDD series

â—Ž Configuration <br> Front speaker: D450 Rear speaker: D400
Center speaker: D4CEN Active subwoofer: D4SUB

Recommended with

The high sensitivity and easy-going personality allow D450PDD to be freely matched with various AV amplifiers. Jamo AVR690 should be the first choice, and the integrated DVR 50 is also a good match. At the same time, Onkyo TX-SR502, Yamaha VX1400, Sony DB790, Phoenix Voice AV899 The piano score BT-6800 is also competent.

Brand background and product positioning

Jamo's history begins with a small Danish fishing village. In 1966, when carpenter Preben Jacobsen started making speakers in his chicken coop, he did not expect that a specialty brand Jamo, which is now spread all over the world, came out like this, and now has a large plant of 30,000 square meters, which is An acoustic miracle.

Jamo is different from many audio brands in that it focuses on providing personalized sound solutions for different consumers, because Jamo believes that the judgment of good sound depends largely on subjective factors, that is, good sound Without standards, it is difficult to judge. It is precisely because of this guiding ideology that Jamo products are more targeted at the public, including women who have the power to make decisions at home, rather than a handful of audiophiles, thus achieving unprecedented market success.

D450 PDD is a new set of cinema speaker system introduced by Jamo. It adopts a lot of new techniques in the shape, structure and unit. At the same time, through the partial modification of the unit, foot nails and other parts, it creates a unique atmosphere, and the price is also Not too high, suitable for consumption by the majority of urban residents.

Technology and Design

Observation found that the D450 PDD theater speaker system has been carefully designed by the Jamo designer. It is Jamo's first speaker with a curved front baffle design. It is a sandwich of foamed ABS material and MDF board, which can provide good internal damping and suppress the vibration of the cabinet. The metal foot nail support can ensure the stability of the cabinet and make the speaker beautiful.

In terms of the unit, it can be found that the D450 bass unit uses an aluminum phase plug, which can make the diaphragm move lighter and faster, and can cool the voice coil to prevent burning, which is safer in the home theater big dynamic scene, and The dark red cone is made of wood fiber material, its back is coated with paint, and the front is glued to make the diaphragm stronger and stronger. The tweeter is a double coaxial diaphragm, which can expand the frequency response of the high and low ends, so that the combination with the bass unit is smoother, and the high frequency rises to 40kHz.

At the same time, there is a technical detail that must also be mentioned. The D450's tweeter diaphragm is biased to one side. This is not only for uniqueness, but also for sound design: the distance from the top of the speaker and the two sides to the tweeter unit is different. The edge reflection will not gather, the interference of treble replay is reduced, and the sound is more transparent and crystal.

Music performance and theater effects

Jamo is making progress, but he has to admit that D450 is impressive. This is a fusion and coherent sound. The sound is slender and sweet, soft and outgoing. The performance of the female voice is more delicate. It can show the sound in a flat manner. It is quite stable and delicate. It does not emphasize the level and positioning, but the hearing is good. , Softly depicting the Ambilight, which can simplify many complicated sound structures and other contents that are difficult to distinguish. The scenes of the cartoon world are presented one by one.

Then the listener can fully relax himself and produce a pleasant feeling. Whether D450 is in music and theater performance, or even the production of background music in the daily life of the family, it is remarkable. For beginners who do n’t know much about music, Jamo has a great design.


Fast, sharp, strong, full and full theater atmosphere

â—Ž Configuration <br> Front speaker: PMC GB1 Rear speaker: PMC DB1 CH +
Center speaker: PMC DB1-MC-CH + (center special edition)

Recommended with

The sensitivity of 97dB makes this system have no special requirements for the amplifier. Common AV models with comprehensive quality standards can make PMC show a strong sense of presence. If you want a beautiful sound and good listening, both Hi-Fi and AV, the softer and more delicate model is more suitable.

Tianlong AVR-3805, Sony DB790, Pioneer VSX-AX5Ai, and Pianmei SPA20 are all good choices. Bryston AV front and rear levels can make it fully show the charm of audio and video.

Brand background and product positioning

PMC is the abbreviation of Professional Monitor Company and was established in 1990 in London, England. Because the two founders Peter Thomas and Adrian Loader both worked at BBC British Radio early on, they were engaged in the research work of monitor speakers, which laid a good foundation for acoustic design. In the research, they found that speakers designed with Transmission Lines are The sound performance has a great potential, and it was decided to commercialize it, so PMC was established, and transmission line speakers became the biggest feature of PMC.

With painstaking research, PMC has achieved fruitful results in the design of speakers with transmission lines. BB5, MB2, IB1, LB1 and many other products have been widely used in the monitoring field. At the same time, it has also attracted strong interest from senior enthusiasts.
GB1 and DB1 are new works of PMC, and are currently the lowest-priced products of PMC (compared with models of considerable volume). They can be used for both Hi-Fi and AV.

Technology and Design

GB1 and DB1 also adopt the transmission line design. Its small and stylish body is considered a miracle and great success by PMC: while maintaining the PMC design and sound style, the shape is more beautiful and more suitable for use in the family environment.

It is worth emphasizing that the principle of PMC's transmission line cabinet design comes from the 1/4 wavelength resonance theory, but in the specific implementation, PMC chooses the bass unit parameters on the one hand to correspond to the design model, on the other hand, through the interior of the cabinet The length, opening and internal shape of the labyrinth (labyrinth), as well as the use of damping materials at different positions of the box, to control the change of sound speed and air density to achieve the purpose of obtaining the ideal sound performance. This is an amazing design. It relies on technology, experience, and repeated adjustments. It is very complicated. I have discussed PMC design with some electroacoustic experts and senior audio designers. They also sincerely admire PMC's unusual design and sound tuning techniques.

Each speaker of the combination of GB1 and DB1 audio and video speakers is designed independently, all aiming to meet the requirements of stereo playback. Among them, the GB1 internal transmission line with a height of 870mm is up to 2.4m, which means that its small box is very tortuous and complicated. The woofer used is a small-diameter magnesium alloy diaphragm Vifa unit, and the low frequency dive can reach 29Hz, which is A miracle created by transmission line design. The tweeter is a 27mm Vifa silk membrane dome unit. DB1 also uses the same unit, which is also designed for transmission lines. The middle is specially equipped with special binding posts. The internal design is exactly the same as DB1, thus ensuring the sound and characteristics of the entire speaker system.

Music performance and theater effects

The strong theater atmosphere and strong impact is shown by a speaker system that only uses a 5-inch woofer. It is indeed surprising and unimaginable, but this is a fact. The theater system of PMC has a clear and sharp sound image. The sound is full of excitement, realistic movement, fast speed, and the low frequency is quite full and full. The sense of separation from the box is obvious, and the speaker seems to have disappeared. The roar of cars, the impact of bullets, the sense of space on the stage and the texture of musical instruments are all so real, with a strong sense of presence. Although they are not as large as PMC high-end speakers, they are also refreshing.

In the replay of music, GB1 can also truly express the texture and obvious movement patterns, and the transient performance is excellent. Perhaps it is not the best unit (about the price factor), the sound is not particularly soft and delicate, but the high pitch is convincing. This is due to the excellent design techniques and is a deep manifestation of technical skills.


Dynamic, strong and mellow new Bel Canto
mission elegante e82

◎ Configuration <br> Front speakers: e82 Rear speakers: e80 Center speakers: e8c ​​Active subwoofer: e8as1

Recommended with

Dynamic sound, sweet performance, 90dB high sensitivity makes elegante have a good adaptability, Marantz SR9200, Onkyo TX-NR801, Pioneer VSX-AX10Ai, and beautiful An Cameo are good choices.

Brand background and product positioning

Due to the frequent changes of agents in China, the British mission (Baisheng), a brand that has a good affinity for the Chinese market and audio consumers, has not improved greatly in China, which makes people sigh. Finally, the clarification of the new agent in China and the official launch of the Chinese market have allowed this senior British brand with more than 20 years of history to meet the majority of audio-visual enthusiasts.

Bel Canto has a high market share in the European and American markets, especially the British market, and the past Chinese market has also responded very friendly to it. It relies on good quality, low prices, and a sound performance that is both elegant and popular. With independent technology, R & D, production and other advantages, coupled with long-term brand accumulation, the many products of Bel Canto have made Chinese enthusiasts unforgettable.

Since the launch of the PILATRO flagship speaker in 2001, Belarus also has a place in the Hi-End field, but the high price (300,000 yuan) is prohibitive, and it is imperative to transplant the flagship technology on the affordable product With elegante series.

The elegante series is the latest product of Bel Canto. There are 3 sets in total, all of which are configured for home theaters. Since e83, the largest combination, has not yet been launched in China, this evaluation is the e82 system, which has just won the "WHAT HI-FI ? 》 Five-star evaluation.

Technology and Design

The appearance of elegante is very similar to that of Belstar flagship Pilastro, and the shape of the base is basically the same, but the volume is much smaller. The manufacturer calls it a reduced version of Pilastro. The most special thing is that they also use the box material used by Pilastro- Granitech super-hard composites are integrated, therefore, the speakers give people different appearances, textures, and craftsmanship from other speakers. They are particularly strong and heavy, and there are no parallel surfaces. Obviously, they can resonate the cabinet. And the adverse effects caused by standing waves are minimized.

All speakers of the e82, including the center and surround, all use the same treble. The bass unit is also a feature of elegantte. Its treble is 25mm Viotex-S sound film, and the bass is 110mm polyarylamine fiber sound film. The new material is designed by Belson. Among them, e82 is a 3 frequency 6 unit design, using 4 polyarylamine fiber woofer, e80 surround speakers are 2 frequency 2 unit design, e8c center speaker is 2 frequency 3 unit design.

Elegante also uses Pilastro's many technologies, including key links such as the design of the frequency divider, which are carefully constructed. There are two options for the subwoofer equipped with the system. One is an ABR passive bass radiating e8asI with a built-in 350W amplifier, with three 250mm woofers, two of which are passive passive units, and the other is a built-in 500W amplifier with a Four 210mm woofer e8as1 have more adjustment functions and higher level.

Music performance and theater effects

This is the new style of Bel Canto, and we will take a look at it immediately. The sound of this system is strong, mellow, full of movement, and has a high density. It shows a sense of movement and has a sufficient sense of envelopment. Don't underestimate this system, its impact is also quite good, can be called a dynamic giant, hot theater and sweet music have good performance. Sure enough, it is an old-fashioned manufacturer, and the grasp of the temperament and intonation is also in place.

For those who want to build a small and medium-sized theater system within 25 square meters, and it is really effective and of good quality, elegante is one of the best choices.

Bright, steady, and modern sound
B & W 700 series

â—Ž Configuration
Front speakers: 704
Rear speakers: 705
Center speaker: HTM7
Active subwoofer: ASW700

Recommended with

High-quality AV amplifiers, models with good sound quality and control are essential: Marantz SR-14EX, SR9300, Onkyo TX-NR901, Rotel RSX-1067, Pioneer VSX-AX10Ai, Ke Song D9, Cary L Models such as -6 / C-7 before and after can be considered.

Brand background and product positioning

B & W, a well-known and well-known audio brand, has frequently commented on its series of products on various audio and video media at home and abroad. With a history of more than 30 years, every period of time there are shattering products. NauTIlus nautilus technology and Kevlar sound cone are the specific embodiment of B & W technology. Today, from the Signature 800 signature version to the DM303, B & W products have set foot in the top Hi-End giant system to affordable entry speakers, forming a strong brand effect and product coverage, coupled with a strong promotion method, B & W in the audio The success of this is obvious to all.

The 700 series is the backbone of B & W, and their introduction is frequently seen in the text, but there are still few articles about their evaluation in the form of home theaters, so how does it perform in AV? What's the difference? In fact, the 700 series is originally a Hi-Fi, AV compatible, balanced design, used in home theater, naturally handy.

Technology and Design

The adoption of NauTIlus treble is the biggest highlight of B & W's sound design. Moving down the high-end technology, the mid-range positioning products of the 700 series also use the same units and technical connotations of the 800 series. More enthusiasts pay attention.

The tweeter is placed in the transitional position between the curved front baffle and the sloped top plate. The side plates on both sides of the box are retracted from front to back. Flowport golf inverted holes, Kevlar bass diaphragm and other designs are all technically connotative and innovative Office.

At the same time, in order to match the home theater, the 700 series is also equipped with a specially designed HTM7 center speaker, which is generous in shape and placed above the TV or below the screen, which is pleasing to the eye. Rear and surround speakers can choose 705 or specially designed wall-mounted DS7 speakers. Active subwoofers have built-in 500W power amplifier, 250mm bass ASW700 for medium-sized rooms (within 30 square meters), built-in 1000W power amplifier, 300mm bass ASW750 for large-scale listening places (more than 30 square meters).

Music performance and theater effects

The 700 series needs to express a sound with a huge sense of scale. The sound performance is quite atmospheric and open, and has good consistency, stability and density, and the details can be well presented.

The Hi-Fi sense has a prominent performance during AV replay, with bright, bright high frequencies, full and tough mid-range frequencies, and thick, full-bodied low frequencies reflecting B & W's uniqueness in sound design. The advantages in speed and strength are obvious, and it also has sufficient performance for the sense of movement and direction emphasized in the theater performance. B & W has its own unique skills.

For audio-visual enthusiasts who have brand requirements and effect requirements, pursue a modern sense, and have a large living environment, the B & W700 series can do a good job.

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Comprehensive evaluation of twelve sets of European and American famous brand home theater speakers (2)

Published on 2006-04-17 23:37 • 1863 times read
Comprehensive evaluation of twelve sets of European and American famous brand home theater speakers (2)
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General Features

Stable Quality & High Reliability 
Starlight battery is well-known for its stable and reliable performance.Starlight batteries are easy to maintain; thus,permitting a safe and proper operation of theequipment that the battery powers. The battery can withstand overcharge, over discharge,vibration, and shock.It is also capable of extended storage.

Sealed Construction 
Starligh's unique construction and sealing technique guarantees that no electrolyte leakage can occur from the terminals or case of any Starlight's battery. Thisfeature insures safe and efficient operation of our batteries in any position. our batteries are classified as "Non-Spillable" and will meet all requirements of the International Air Transportation Association.

Long Service Life, Float or Cyclic 
The Starlight Vrla Battery has a long life in float or cyclic service. The expected life of float service is 18 years @ 25℃.

Maintenance-Free Operation 
During the expected float service life of Starlight batteries, there is no need to check the specific gravity of the electrolyte, or add water. In fact, there is no provision for these maintenance functions.

Low Pressure Venting System
Starlight batteries are equipped with a safe low pressure venting system,which operates from 1 psi to 6 psi.The venting system is designed to release excess gas in the event that the gas pressure rises to a level above the normal rate.Afterwards,the venting system automatically re-seals itself when the gas pressure level returns its normal rate.This feature prevents excessive build up of gas in the batteries. This low pressure venting system, coupled with the extraordinarily high recombination efficiency, make Starlight batteries the safest Vrla Batteries available.

Heavy Duty Grids 
The heavy-duty lead calcium-alloy grids in Starlight batteries provide an extra margin of performance and service life in both float and cyclic applications, even in conditions of deep discharge.

Low Self Discharge 
Because of the use of Lead Calcium grids alloy, Starlight VRLA battery can be stored for long periods of time without recharge.

Main Applications:

Alarm Systems;Cable Television;Medical Equipment;Communications Equipment;Micro Processor Based Office Machines;Control Equipment;Portable Cine & Video Lights;Computers;Power Tools;Electronic Cash Registers;Solar Powered Systems;Electronic Test Equipment;Telecommunications Systems;Television & Video Recorders;Emergency Lighting Systems;Toys;Fire & Security Systems;Uninterruptible Power Supplies;Geophysical Equipment;Vending Machines.

Middle Sized VRLA Batteries

Middle Sized Vrla Batteries,Middle Size Vrla Battery,12V4Ah Vrla Battery,Lead Acid Battery

Starlight Power Industrial Company Limited , https://www.starlite-power.com