Purity - Speaker Martin Logan - Free user manual and instructions
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| Product Type | Electrostatic Loudspeaker |
| Model | Purity |
| Brand | Martin Logan |
| Dimensions (H x W x D) | 63 x 12 x 19 inches (160 x 30 x 48 cm) |
| Weight | 56 lbs (25 kg) each |
| Power Handling | 200 watts RMS, 400 watts peak |
| Frequency Response | 28 Hz – 22 kHz ± 3 dB |
| Sensitivity | 90 dB / 2.83V / 1m |
| Impedance | 4 ohms nominal, 1.6 ohms minimum |
| Recommended Amplifier Power | 20 – 400 watts per channel |
| Crossover Frequency | 350 Hz |
| Type of Crossover | 2-way, electrostatic panel with powered woofer |
| Electrostatic Panel Type | CLS™ (Curvilinear Line Source) |
| Woofer Type | 10-inch (25.4 cm) cone, front-firing |
| Woofer Amplifier | Built-in 200-watt Class D amplifier |
| Connections | Bi-wire capable, 5-way binding posts |
| Finish | Black, Cherry, and High Gloss options (verify availability) |
| Cleaning | Use a soft, dry cloth. Do not use any liquids or cleaners on the electrostatic panel. |
| Safety | Place on a stable surface. Keep away from moisture. Do not block ventilation of the powered woofer. |
| Spare Parts / Repairability | Contact Martin Logan authorized service centers for replacement panels, woofers, and electronics. |
| Manual Language | English (original), translations available upon request. |
Frequently Asked Questions - Purity Martin Logan
What is the recommended placement for the Purity speakers?
Place the speakers at least 2-3 feet from the rear wall and 1-2 feet from side walls to allow the electrostatic panel to breathe. Toe them in slightly toward the listening position for optimal imaging.
Do I need a subwoofer with the Purity?
The Purity has built-in powered woofers that provide solid bass down to 28 Hz, so a subwoofer is not required, but it can be added for deeper low-frequency extension if desired.
How do I clean the electrostatic panel?
Use a soft dry microfiber cloth to gently wipe the panel. Do not use any liquids, sprays, or compressed air, as they can damage the delicate membrane.
What amplifier power is recommended for the Purity?
An amplifier with 20-400 watts per channel is recommended. The speakers are 4 ohm nominal with low impedance dips, so a stable amplifier is required.
Can I bi-wire or bi-amp the Purity?
Yes, the binding posts are bi-wire capable. Remove the jumper straps and connect separate cables to the high and low terminals. Bi-amping requires two amplifiers.
Why do I hear a slight hiss from the speakers?
Some hiss is normal due to the electrostatic panel's high voltage bias. It should be barely audible from the listening position. If excessively loud, check connections and amplifier noise.
How long do electrostatic panels last?
With proper care, electrostatic panels can last 15-20 years. Direct sunlight, high humidity, and dust can degrade them faster. Clean regularly and avoid overdriving.
What should I do if the speakers produce no sound?
Check that the power cord is plugged into the subwoofer amplifier, the power switch is on, and the amplifier/receiver is properly connected. Also ensure the panel bias is getting power (a small LED indicator).
Are there any safety precautions for using the Purity?
Do not touch the electrostatic panel while powered on. The panel operates at high voltage. Keep small objects away from the panel. The woofer cabinet should be on a stable surface to prevent tipping.
Can I mount the Purity on a wall?
Wall mounting is not recommended. The Purity is a floorstanding speaker and its electrostatic panel requires air space behind it for proper dispersion. Use the included stabilizer feet on the floor.
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Product information
Brand : Martin Logan
Model : Purity
Category : Speaker