TEST: LD Systems ICOA Sub 15 A

Inexpensive subwoofers have become a permanent fixture in the PA sector. In particular, the mobile range, which can be scaled if necessary and transported by a single person in an emergency, enjoys great popularity, because you can buy the necessary self-sufficiency in terms of fixed installations with comparatively little effort. Especially in the subwoofer sector, the power-to-weight ratio is a decisive point for transportability, so it's not surprising that the majority of consumer subwoofers are always just at the limit of personal capacity in terms of weight. Another representative of the transportable species is the LD Systems ICOA SUB 15 A, which we have for testing.

The construction of the LD Systems ICOA SUB 15 A

Like the somewhat larger colleague of the LD Systems ICOA SUB 15 A, the 18 A version, which, as expected, comes with an 18-inch speaker, the system is based on an active / 15-inch speaker version, which has been optimized in terms of cabinet design to transfer as much power as possible into the smallest possible and comparatively light housing.

The term "light" may not come easily to one's lips with a weight of 32.5 kg, but in return you also get a power of 400 watts RMS with a peak of 1,600 watts. Depending on the selected program, the frequency curve can be adjusted upwards at 80 Hz, 100 Hz or 120 Hz, downwards the system should reach 36 Hz according to the manufacturer, a value that leaves a good impression for a 15 inch subwoofer.

In order to transport the colossus, a total of 4 handles were embedded in the case. On the one hand, two classic, side-mounted trough handles for 2-person transport and two single, recessed handles on the front of the case. Thanks to regular fitness training, I managed to transport the woofer comparatively well with one hand over short distances, but this method is not recommended as a standard. For products of this size, I always recommend a roller solution anyway, which LD Systems, a brand which is known to be under the umbrella of the Adam Hall Group, have directly thought of. A total of 16 screws, 4 per roller, were already mounted from the factory to choose the appropriate rollers from the Adam Hall range.

The second handle on the front side explains itself then also for the role transport, in order to pull the product for example a ramp out. If you then invest another 44 euros in the water-repellent nylon protective cover ( https://www.thomann.de/de/ld_systems_icoa_sub_15_pc.htm ), you can transport your component comparatively easily to the warehouse, or store it safely. Both components are highly recommended in my opinion.

The (W x H x D): 510 mm x 598 mm x 552 mm large housing of the LD Systems ICOA SUB 15 A in itself is very robustly designed and was made of 18 mm multiplex. A rough structure varnish secures against light external influences, for rough handling, see above mentioned protective cover. For appropriate scaling, the LD Systems ICOA SUB 15 A has 4 stacking recesses, in which several units can be stacked on top of each other if necessary.

To protect the internal speaker against external influences, the box has a very solid metal grille on the front. The amplifier unit on the back is recessed, which protects all connections and the heat sink from lateral forces. As accessories, the system only has a power cable and an eight-language user manual, which is unfortunately printed very small, but contains all the necessary information along with a few useful practical tips. A fact that is anything but normal nowadays, but especially in the PA sector must be evaluated as a basic requirement.

The electronics

The LD Systems ICOA SUB 15 A is designed to be comparatively simple in terms of user-friendliness and can be configured easily even without what is considered to be too much expert knowledge. The system has 2 XLR inputs and outputs plus a volume control, which also leads through the menu via a push function. The display is of simple quality, but can be read well even in difficult lighting conditions and can be configured as needed in terms of brightness, etc. to your own needs. The system has a multi-voltage power supply and the usual protection circuits against overheating, overvoltage and overcurrent, as well as a peak and RMS limiter with the trademarked name DYNX DSP. For trouble-free operation, however, an ambient temperature of 0 - 40 degrees should not be undercut, respectively exceeded.

For mono operation, the system has an internal mono summation, with 2 woofers of this series is practiced normal stereo operation. The wiring is done in standard mode console - woofer - satellites. As crossover frequencies you can choose between 3 frequencies on the system (80 Hz, 100 Hz, 120 Hz). The standard display shows the total volume of the system, the selected crossover preset and the input levels of the two inputs. If the input level is too high, the output level on the console must be reduced accordingly.

The fact that the LD Systems ICOA SUB 15 A was designed for professional use despite its moderate dimensions is shown by the additional setting options of the DSP electronics. On the one hand, the system has a runtime program that allows a delay tower of up to 10 meters and can be configured in very small 10 cm steps, thus allowing for spatially larger installations. Likewise, the phase position of the woofer can be changed when standing waves occur.

Much more important in terms of practicality, however, is the possibility of cordioid operation, that phase cancellation, which improves the signal quality in general and especially makes the life of the stage musician many times easier, but unfortunately still conjures a big question mark on the forehead of a large part of all users. In simple terms, a cordioid circuit ensures that the spherically radiated bass range of a subwoofer is reduced towards the back of the stage by means of phase cancellation and the artists are not tormented with excessive droning. Anyone who, like me, has been partially drowned in bass mud on stage at large open air venues around the globe knows what I'm talking about.

In order to be able to use this coordinated cardioid radiation characteristic specifically, it requires 2 pieces, better yet 3 iStück dental subwoofers, which are set up next to each other and whose delay times are identical. LD Systems describes in the attached manual the handling and advantages of this setup very well, absolutely commendable.

The LD Systems ICOA SUB 15 A in practice

As already mentioned, in terms of handling, you can hardly make it easier for the user. Adjust volume, crossover frequency with satellites and select, done! And the result can be heard. In general, the LD Systems ICOA SUB 15 A has a very soft, almost flattering sound, but fortunately without the sound slipping into the undifferentiated.

As is well known, it is always somewhat difficult to ensure a differentiated sound image in the two-digit Hertz range due to the spherical characteristics, but due to an optimized bass reflex port, the cabinet produces a very adult, slightly compressed bass despite its uncluttered dimensions, but leaves no doubt that everything necessary in the two-digit Hertz range is well brought to the man.

The headroom is very decent, the limiters intervene very musically and the cabinet is massive enough not to let it come to any surge in the low bass range. Even though it's basically a given, it's always nice to come across locking XLR jacks. I don't know how many times recently I've come across the simple plug-in connection even on high-priced equipment. In general, the system leaves a very good impression and will certainly find many friends in the professional as well as semi-professional camp due to its good transportability.

Conclusion

With the LD Systems ICOA SUB 15 A, the Adam Hall subsidiary has a very practical woofer in its portfolio, which can convince both from the processing, as well as the concept. With 3 fixed crossover frequencies, a cordioid circuit and a finely resolved delay concept, the system meets all the requirements for professional operation and that too at a very moderate retail price.

Anyone looking for a subwoofer in this performance class should definitely test the LD Systems ICOA SUB 15 A once.

Additional informations:

    LD Systems is a renowned company in the field of professional audio technology, offering a wide range of high-quality audio products and solutions. This comprehensive report aims to provide a detailed analysis of LD Systems, covering its history, product portfolio, technological innovations, market position, and future prospects.

    Company Overview:
    LD Systems was established in Germany in 2002 and has rapidly grown to become a leading global provider of professional audio equipment. The company was founded on the principles of innovation, reliability, and superior sound quality. With a strong focus on research and development, LD Systems has consistently pushed the boundaries of audio technology, catering to the needs of musicians, audio professionals, and event organizers worldwide.

    Product Range:
    LD Systems offers a diverse range of audio products designed to meet the requirements of various applications, from live performances and concerts to corporate events and installations. The company's product portfolio includes portable PA systems, active and passive loudspeakers, wireless microphone systems, mixing consoles, in-ear monitoring systems, and accessories.

3.1 Portable PA Systems:
LD Systems' portable PA systems are known for their excellent sound quality, ease of use, and portability. These systems are ideal for small to medium-sized venues, providing powerful and clear sound reinforcement. LD Systems' portable PA systems incorporate advanced features such as built-in mixers, wireless connectivity, and integrated battery-powered options, making them versatile solutions for a wide range of applications.

3.2 Loudspeakers:
LD Systems offers a comprehensive selection of active and passive loudspeakers suitable for various settings, including concerts, clubs, theaters, and houses of worship. The company's loudspeakers are engineered to deliver exceptional sound reproduction, precise dispersion patterns, and robust build quality. LD Systems' loudspeakers are available in different configurations, including line arrays, point source systems, and subwoofers, ensuring flexibility for any audio setup.

3.3 Wireless Microphone Systems:
LD Systems' wireless microphone systems provide reliable and interference-free audio transmission for performers, presenters, and public speakers. The company's wireless systems offer a range of options, including handheld, lavalier, headset, and instrument transmitter systems. LD Systems employs advanced wireless technology to ensure stable connections, excellent audio quality, and ease of use, making them suitable for both professional and educational applications.

3.4 Mixing Consoles:
LD Systems' mixing consoles are designed to meet the demands of audio engineers and sound technicians. These consoles combine intuitive control interfaces with powerful signal processing capabilities. LD Systems offers a range of mixing consoles, from compact models for small-scale applications to full-featured digital consoles for large-scale productions. These consoles provide precise control over audio signals, extensive routing options, and integrated effects, enabling professionals to achieve superior sound quality.

3.5 In-Ear Monitoring Systems:
LD Systems' in-ear monitoring systems offer a personalized and immersive listening experience for musicians and performers on stage. These systems provide clear and accurate audio monitoring, eliminating the need for traditional stage monitors. LD Systems' in-ear monitoring systems include wireless transmitters and receivers, earphones, and accessories, ensuring reliable and high-fidelity audio reproduction during live performances.

    Technological Innovations:
    LD Systems places a strong emphasis on technological innovation to remain at the forefront of the audio industry. The company invests in research and development to integrate cutting-edge technologies into its products. LD Systems' innovations include advanced digital signal processing, wireless transmission technologies, lightweight and durable materials, and energy-efficient designs. These innovations enhance the overall performance, reliability, and user experience of LD Systems' audio solutions.

    Market Position:
    LD Systems has established a prominent position in the professional audio market. The company's commitment to quality, reliability, and innovation has earned it a loyal customer base and strong brand recognition. LD Systems' products are distributed worldwide through a network of authorized dealers, ensuring global availability and support. The company's reputation for delivering high-quality audio solutions has made it a preferred choice for professional audio users across various industries.

    Customer Support and Satisfaction:
    LD Systems places great importance on customer satisfaction and provides comprehensive customer support services. The company offers technical assistance, product training, and warranty services to ensure customer satisfaction throughout the product lifecycle. LD Systems' commitment to customer support has contributed to its positive reputation and long-term customer loyalty.

    Future Prospects:
    With a solid foundation in the professional audio industry and a focus on technological innovation, LD Systems is well-positioned for future growth. The company's dedication to delivering high-quality audio products, coupled with its ability to adapt to emerging trends and market demands, ensures its continued success. LD Systems' expansion into new markets and continued investment in research and development will drive its future prospects.

    Conclusion:
    LD Systems' commitment to innovation, superior sound quality, and customer satisfaction has positioned it as a leading player in the professional audio technology industry. The company's extensive product range, technological advancements, and global market presence make it a preferred choice for musicians, audio professionals, and event organizers worldwide. With a focus on continuous improvement and future-oriented strategies, LD Systems is poised for sustained growth and continued success in the dynamic audio technology market.