Building on the success of the mark I, the mark II incorporates design elements established during the production of the IB2S-A active loudspeakers last year, as well as feedback from professionals in the discerning broadcast, outside broadcast, post-production, mastering and music recording markets. Just like the Mark I, the IB1S-AII features PMC’s award-winning Advanced Transmission Line™ (ATL™) technology, the company’s proprietary low-frequency carbon-fibre and Nomex™ 10-inch flat piston driver, and the isolated three-inch mid-range driver and the 27mm soft-dome high-frequency driver of the original IB1S-A, as well as the precision, hand-assembled 24dB/octave crossovers. The amplification is taken care of by PMC’s DS-001 Class D power amp, housed in the vented plug-and-play DS-MODULE-001, which fits to the rear of the cabinet. Deceptively powerful for its size, the DS-001 delivers a blistering 400W of power into the 4Ω IB1S-AII.
The IB1S-AII adds the newly engineered absorptive foam lining for the ATL™ that was used in last year’s IB2S-A. This further reduces harmonic distortion and results in a higher definition, more clearly defined bass and a more transparent mid-range with reduced colouration from the low frequencies. And as with the IB2S-A, the redesigned cabinet for the IB1S-AII also features extra internal bracing to reduce cabinet crosstalk and reduce resonances even further.
As with the original IB1S-A, the SB100-A Active subwoofer may also be added to the system if required. With the same sonic characteristics and low-frequency response as the bass driver from the IB1S-A, the SB100-A provides a perfectly balanced means of monitoring the ‘point one’ bass channel in a surround setup. A compact, horizontally orientated version of the speaker, the IB1S-A-CII, is also available for use as a dedicated centre channel speaker in 5.1 arrays.
PMC’s unique (Advanced Transmission Line) enclosures have taken loudspeaker design to the highest level, using sophisticated cabinet construction, proprietary drive units, and patented absorption materials and techniques. The benefits are enormous compared to the relatively simple sealed and ported designs currently available elsewhere. Find out more