30 hours of work (functionality check and testing)
The British company PMC, the abbreviation of which can be decoded as "Professional Monitor Company", has been developing and producing a variety of acoustics of the highest studio level for two decades.
The British company PMC, the abbreviation of which can be decoded as "Professional Monitor Company", has been developing and producing various acoustics of the highest studio level for two decades.
Today, all models of PMC speakers are developed and assembled at the company's own plant in Great Britain. Last but not least, the high quality of the released speakers is explained by the fact that Peter Thomas, who is a recognized expert in his field, is directly involved in their creation. Speaking about the popularity of PMC products, one cannot fail to note that the company is very careful in the selection of all components used in production. All parts of the speaker are subjected to quality control, starting with small components such as resistors and ending with the case. At the same time, the parameters of all electronic components are measured to meet the requirements for sound and reliability. There is a detailed file for each pair of released speakers, which will help to restore the characteristics with high accuracy in case of repair.
Key filter nodes use Solen film capacitors and hand-wound inductors with carefully selected cores. The filter elements are mounted on a glass-textolite board with thick conductive tracks made of purified copper, which provides a large margin of current. To reduce the electromagnetic interaction and, accordingly, to obtain a cleaner signal, at the final stage, a fine adjustment of the mutual location of the filter elements on the board is carried out. To ensure the shortest signal path, direct installation of conductors on British-made terminals is used.
The Twenty series was released for the twenty-year anniversary of the company. A characteristic feature of the series is slightly beveled back housings made of 18 mm high-density fiberboard. A rare (but beloved by the PMC team) acoustic design with an ATL (Advanced Transmission Line) labyrinth is used instead of the usual phase inverter. In the upper link is a chic Norwegian textile whistle SEAS Sonolex 27, which sounds the range from 1800 to 25000 Hz. And the mid-bass driver (170 mm) with a light diffuser made of pressed cellulose, a classic rubber suspension and a cast basket is responsible for the rest of the range. Acoustics decorated with natural veneer (amarone), allows bi-wire connection. The effective length of the ATL reaches three meters.
The ATL is a long labyrinth created with the help of partitions inside the speaker body and has an external outlet. The labyrinth is filled with a damping material that absorbs almost all the sound waves that radiate the midrange / woofer drivers inside the cabinet, except for the lowest bass. This design helps to get rid of the acoustic overtones of the case and provides a deeper and faster bass than in conventional speakers of a similar size, as well as transparent mid-range frequencies. In addition, acoustics with ATL do not lose the bass component even at a low volume level.
The column is attached to a small base with stainless steel spikes, which provides a "disconnect" to the floor. Its body also has a "connection" with this base with the help of special gaskets. This allows you to get a better focus of the stereo image and a denser and more accurate bass.
Speakers should be placed in the room in accordance with the manufacturer's recommendations, that is, not too far from the walls and with the direction of the radiation axes to a point behind the listener.
The strength of PMC is that their sound is absolutely alive, developed to the smallest detail in all aspects - in dynamic, frequency, spatial. Every image is presented in a three-dimensional dimension, as well as harmonically. The middle is very clean. The attack is realistic because the fronts of peak and strong signals are not delayed. The upper register impresses with its clarity and colorfulness.
The concept of these unusual two-band "towers" is as close as possible to ideal single-band acoustics. The long ATL coupled with a single lightweight mid-bass driver made it possible to achieve smooth bass transmission without phase distortion.
Characteristics of acoustics
Crossover Frequency: 1.8kHz
Dimensions: H 1028mm 40.47” (+25mm spikes) W 184mm 7.25” D 419mm 16.5” (+6mm grille)
Drive Units: LF PMC twenty series, lightweight doped 6.5”/170mm cone with cast alloy chassis
HF PMC/SEAS®, 27mm twenty series, SONOLEX™ soft dome,
Ferrofluid cooled Effective ATL™ Length: 3.0m 9.8ft
Frequency Response: 28Hz - 25kHz
Impedance: 8 Ohm Input
Connectors: 2 pairs 4mm sockets (Bi-amp or Bi-wire)
sensitivity: 90dB 1w 1m
Weight: 21 kg 46.2 lbs