Ramiro Ramírez has worked in professional audio, from the real beginning of the installation of plants for the manufacture, to the processes of technology transfer, design and product engineering, production and administrative management and management.
By Richard St.
With 36 years of experience in the audiovisual industry, the Mexican engineer Ramiro Ramírez has been a witness of the evolution of audio in his country, both from the manufacturing and the handling of the products. He spoke with AVI LATIN AMERICA about his experiences in these years and his vision of the industry.
After graduating in 1980 of Engineering in Communications and Electronics at the University of Guadalajara, he was immediately linked with the audiovisual industry in the company Acoustic Control of Mexico, where he was 10 years and then went through Acoustic International, Meridian Audio Labs, Tecno-Acústicos Acústicos , to Sensey Electronics, where it takes 11 years.
Remember that before finishing his career he was already cutting bafles in the garage of his house at the point of saw, with so little office, that they were made of solid pine brushed, gummed and nailed. These were two- and three-way speakers, with Philmore brand universal frequency splitters, purchased from the downtown electronics stores.
"Those bafles sounded really bad. Specifications?; And what was that? No, the specifications did not exist in my universe yet. Later a neighbor who studied at the Cereti half lectured me, and among other things said to me: "Make a hole in the front ... They sound better the basses." And I began to notice, and I saw that it was true.
It was not until I joined work on Acoustic Control in Mexico that I met the first Guru of electronics and acoustics to convey the first elementary knowledge about the design of speakers. Your name? Russell Vance Allee, then head of engineering at the Acoustic plant in Van Nuys, CA, "he said.
"Russ", as everyone knows, is passionate about audio and electronics, and a born teacher. In his extensive career, he has worked the same for NASA, designing LNA's for tracking spy satellites, or the same for Fender (he is the designer of the popular "Passport" system), plus a handful of American companies with which too Collaborated He also had his own company called AMP (Amplified Music Products), where he produced some models that remain a benchmark among American purist enthusiasts, bass amp enthusiasts.
Ramiro Ramirez added that "since Russ was incapable of staying for himself with his extensive knowledge, I took advantage of the circumstances and his patience, asking again and again how much doubt came to my mind while he gave me books and hardware built By himself, to be able to realize my first graphs of SPL and impedance with the help of an Excel sheet. It was thanks to him that I understood the functioning of an acoustic cabinet extensively and I knew the advanced terms of the behavior of the acoustic waves and the relation to them. "
Design and research
Sensey Electronics, where Ramiro Ramirez currently operates, is based in Guadalajara. Its work is mainly related to the design of new products and the modification and updating of existing models.
As part of his work, he said that "once a system is prototyped and constructed, it is necessary to make field measurements to observe their behavior as a whole. The Department of Engineering and PRO Audio is responsible for carrying out these measurements. When these tests are done, I am usually as an observer, to get feedback on any first-hand problems. "
Therefore, for this Mexican engineer the main challenge of his work is the development of products with the highest reliability and quality at the best possible price. This involves teamwork, in which several people contribute the best to carry out the task.
Speaking of the evolution of the industry, Ramiro Ramírez compares his beginnings in the events live with what he lives today. "I realize the real progress made in this imperfect world of acoustics. We understand that the natural environment through which sound waves are transported, is very capricious, is voluble and dependent on different variables. There is no doubt that there has been an evolution. The use of computers and useful programs have changed everything. Today we can simulate baffle responses or complete systems in a virtual scenario, modifying a large number of parameters and variables, both for design and for real-time operation. "
The importance of knowledge and technique
There are many stories and experiences experienced by our Professional of the month in this long trajectory, but there is a particular anecdote that he likes very much. During an open-air sponsorship event many years ago, he and his team conducted a linear array system consisting of eight boxes per side of a passive model called LA-212, which is composed of two 12 " , Connected in parallel, driving effective 600W in 4 Ohm for the low-end media path, plus a high-frequency compression driver with effective 120W power handling in 16 Ohm.
The sensitivity of these components is very high (99 dB / 1W / 1m for the horn and 111 dB / 1W / 1m for the compression driver). For logistical and transportation reasons, it was decided to work the media to 2 Ohm and the treble to 4 Ohm; In this way a single amplifier capable of delivering a minimum of 480 W per channel in 4 Ohm for all the treble and two amplifiers capable of delivering a minimum of 1,200 W per channel in 2 Ohm for all the media horns would be enough, all without count the bass tracks.
So it was only a single rack with only three amplifiers for a whole line of 8 baffles in linear arrangement. On that occasion the racks were armed with two HCF-PRO40 amplifiers (1,900W / channel in 2 Ohm) and a model amplifier HCF-PRO30 (1,030W / channel in 4 Ohm), both of the mark Back-Stage.
As it was a big event, other systems were installed in other scenarios, all of them big-name clones, deploying lots of immense power racks to feed energy-picking but low-sensitivity fists, serving as a reference for installers, and provoking that his system would be anemic.
He added that "several times I heard the commentary of the onlookers who came to browse during the installation:` That rack can not ... You will not lift ... They are many speakers for three amplifiers'. When the time of the event arrived, not only was our system heard with more sound pressure, but with more clarity thanks to the perfect phase alignment work done by one of our engineers with the use of a digital processor, while the others systems were not calibrated with an advanced method. "
For him, this anecdote serves, on the one hand to emphasize the importance of choosing components that have the highest possible efficiency, in order to use less powerful amplification, less heavy and less expensive, and at the same time serves to exemplify the importance of performing A work of measurement and alignment as close as possible to perfection, in order to obtain the maximum performance of the equipment with which one works.
When it is not dedicated to the development of new audio products, Ramiro Ramírez divides his free time between his family, composed by his wife, his two children and his granddaughter, and his hobbies, which include reading, guitar and good music, astronomy and science fiction.
Sport is also another of his favorite pastimes. He practices jogging and is fond of sports on wheels such as motorcycling and motor racing. In addition, he is a fan of the Chivas of Guadalajara, reason why a "Chiva of heart" is declared.