Unlike other entry level speakers in the market, Opus 1 still carry “The True Quality” in within. From its look to its sound, nothing at its price range would come close. It is certainly a bargain.

Composition:
1. Tweeter: T1RP
2. Mid-woofer: MBL-6
3. Passive crossover: X1

Tweeter features:
1. 1 inch soft fabric dome with special coating for warm and detailed sound.
2. Newly developed low resonance plastic housing for clear and smooth highs.
3. Embossed Crescendo logo as a proof of originality.
4. Two curvy bars grill to minimize grill distortion and enhance its elegant expression.
5. Complimentary 10 centimeters Harmonic Harmony ‘Interlude' cable for fine tuning of sound.

Mid-woofer features:
1. Polypropylene cone for perfect balance between sound, appearance, and durability.
2. Stamped steel chassis with high rigidity for less distorted sound.
3. 6.5 inch size for plug and play installation in almost any cars.
4. Inverted dust cap for stronger cone structure and to avoid premature damage.

Passive crossover features:
1. Designed in car with tweeter above the dashboard and mid-woofer at door panel for optimum sound at the actual condition.
2. L-pad attenuation for less-colored sound and uniform attenuation level.
3. 3 positions switch to adjust tweeter level and Q factor at the same time for smooth blending.
4. No electrolytic capacitors inside. Just film polypropylene capacitors for less colored sound.
5. Inductor for mid-woofer is using metal core for power efficiency so that Opus 1 can be driven by head unit's internal amplifier.

Sound Characteristics:
1. Clear articulation and smooth high.
2. Vocal sounds lifelike and warm. It doesn't sound grainy like most other speakers at this price range.
3. High impact midbass.
4. Rhythmical and a lot of fun for any music from classical to hard rock.
5. Focused and realistic imaging.

Specifications:
1. System nominal impedance: 4 ohms.
2. Crossover point: 3.5 kHz.
3. Frequency response +/- 3db at 30 degree off axis: 63 Hz – 20 kHz.
4. Power handling: 30 – 60 Watts RMS (without High Pass crossover) and 30 – 100 Watts RMS (with High Pass crossover at 63 Hz).

Download: Crescendo 2 way speaker comparison chart