Martin-audio Beatline 28 音箱

The Bealtline28 is a two-way, dual-bass driver, passive loudspeakerdesigned to give extended LF performance from a compact,architecturally neutral, vented enclosure. It features dual8”(200mm) long-throw, 2”(50mm) coil direct-radiating bass unitsand a 1.7”(44mm) diaphragm, 1”(25mm) exit compression driver,mounted on a proprietary, rotatable 90° x 50° constant directivityhorn.

Below 250Hz both LF drivers operate together whilst above250Hz only the upper LF driver is used to reproduce frequenciesup to the crossover point. This technique avoids the uneven polarresponse which would occur if both drivers were operated overthe same frequency band. The LF drivers are also fitted with fluxdemodulation rings, which reduce intermodulation distortion, inorder to preserve midband clarity at high signal levels.

Features

Compact two-way passive system

Dual 8” (200mm) long-throw bass drivers

Extended LF performance User rotatable 90º x 50º horn

High power output

Five year limited warranty

TECHNICAL SPECIFICATIONS

TYPE：Two-way passive reflex with dual bass drivers

FREQUENCY RESPONSE (5)：60Hz-18kHz ± 3dB

DRIVERS：2 x 8" (200mm)/2" (50mm)voice coil LF drivers
         1" (25mm)exit HF compression driver

RATED POWER (2)：300W AES, 1200W peak

RECOMMENDED AMPLIFIER：400-1000W into 4 ohms

SENSITIVITY (6)：95dB

MAXIMUM SPL (7)：120dB continuous, 126dB peak

NOMINAL IMPEDANCE：6 ohms

DISPRSION(-6dB)：90° horizontal,50° vertical

CROSSOVER：2.5kHz passive

ENCLOSURE：20 litre, 15/18mm MDF

FINISH：Textured black paint

PROTECTIVE GRILLE：Black perforated steel

CONNECTORS：Low profile 20 amp push-lock

FITTINGS：6 x M8 inserts for bracket
          2 x M8 inserts for safety point

DIMENSIONS：(W) 258mm x (H) 660mm x (D) 255mm
            (W) 10.2ins x (H) 26ins x (D) 10ins

WEIGHT：19kg (42lbs)