650-R2 Concert Series Subwoofer

Features & Benefits

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High-Power

Extremely low distortion

Long-term reliability

Rugged

Applications

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Road use or installations

Sound reinforcement

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Concert, film and theater

Live music clubs and discos

Bass instrument amplification


The 650-R2 Subwoofer extends the power bandwidth of Meyer Sound reinforcement systems to 30 Hz. Accurate and rugged, this powerful subwoofer consists of two 18-inch cone drivers capable of long excursion with extremely low distortion, set in a heavily braced 14 cubic foot vented enclosure of multiple-ply hardwood.

The 650-R2 operates as a system with the B-EX Control Electronics Unit (one per channel). Optimized for use with the Meyer Sound subwoofers, and pre-aligned at the factory, the B-2EX contains frequency response and phase response alignment circuitry, and Meyer Sound's exclusive SpeakerSense driver protection circuitry, incorporating RMS signal limiting and switchable excursion limiting.

B-2EX Control Electronics Unit

The 650-R2 operates as a system with the B-2EX Control Electronics Unit (one per channel). Optimized for use with Meyer Sound subwoofers, and pre-aligned at the factory, the B-2EX contains frequency response and phase response alignment circuitry, and Meyer Sound’s exclusive SpeakerSense driver protection circuitry, incorporating RMS signal limiting and switchable excursion limiting.

A single-channel device operating at line level, the B-2EX is intended to be the final component in the signal chain before the power amplifier. It is connected in parallel with the input to the system being supplemented by the 650-R2, and incorporates a summing input for deriving a mono subwoofer signal from a stereo program.

The factory-calibrated SpeakerSense circuitry protects the 650-R2 loudspeaker components from damage due to overheating under high power conditions. This unique circuit continuously monitors the power applied to the 650-R2 drivers, and limits the B-2EX output when the safe operating limits of the drivers are exceeded. Until the onset of overload, the SpeakerSense circuitry has no effect on the signal.

Included in the SpeakerSense circuit is a Safe switch, which moves the limit point down by 6 dB and engages the excursion limiter. This has the effect of increasing the safety margin of the system, and is intended to be used when extended periods of overload are anticipated. In addition to these features, the B-2EX incorporates a Crossover switch which engages/disengages the lowpass rolloff of the subwoofer output. This feature may be used whenever it is desireable to operate the 650-R2 full-range as, for example, in instrument amplification.

The setup controls are located behind a cover plate on the B-2EX front panel, providing a means for securing the system installer’s presets.

 

Specifications

Physical

Architect
Specifications

Datasheet (PDF)

Operating Instructions (PDF)

B-2EX Operating Instructions (PDF)