Preface - Uncategorized Martin Logan - Free user manual and instructions
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| Product Type | Electrostatic Loudspeaker |
| Brand | Martin Logan |
| Model | Preface |
| Frequency Response | 42 Hz - 22 kHz ± 3 dB |
| Impedance | 6 ohms, 4 ohms minimum |
| Sensitivity | 89 dB / 2.83 V / 1 m |
| Recommended Amplifier Power | 20 - 300 watts per channel |
| Dimensions (H x W x D) | 63.0 x 10.5 x 19.5 inches (160 x 26.7 x 49.5 cm) |
| Weight | 78 lbs (35.4 kg) each |
| Power Requirement | 100-240 VAC, 50/60 Hz, 150 VA |
| High-Frequency Driver | 1.0 x 1.4 inch (2.54 x 3.56 cm) Folded Motion Transducer |
| Low-Frequency Driver | Two 8 inch (20.32 cm) aluminum cone woofers |
| Inputs | Bi-wire binding posts |
| Grille | Perforated metal grille (attached magnetic) |
| Finish Options | Black gloss, Cherry, Walnut |
| Stand | Integrated base with adjustable spikes |
| Cleaning Instructions | Use a soft dry cloth. Do not use solvents or abrasive cleaners. |
| Safety Features | Internal power supply with overcurrent protection |
| Warranty | 5 years for electrostatic panel, 3 years for electronics |
Frequently Asked Questions - Preface Martin Logan
What is the best placement for the Martin Logan Preface speakers?
Place the speakers at least 2-3 feet from the back wall and 1-2 feet from side walls to allow the electrostatic panel to breathe. Toe them in slightly towards the listening position.
How do I clean the electrostatic panel?
Use a soft, dry microfiber cloth to gently dust the panel. Do not use any liquids, sprays, or compressed air as they can damage the diaphragm.
Can I use a subwoofer with the Preface?
Yes, the Preface works well with a subwoofer. Set the subwoofer crossover to around 60-80 Hz to blend seamlessly with the speakers' low-frequency output.
What amplifier power is recommended?
A quality amplifier between 20 and 300 watts per channel is recommended. Avoid very low-power amps as they may clip at higher volumes.
How do I bi-wire the speakers?
Remove the jumper bars between the binding posts. Connect one pair of speaker cables to the top terminals (high-pass) and another pair to the bottom terminals (low-pass). Ensure correct polarity.
What should I do if the speaker makes a popping sound?
Check all connections and ensure the amplifier is not clipping. If the issue persists, there may be a problem with the electrostatic panel; contact Martin Logan support.
Is it safe to leave the speakers plugged in constantly?
Yes, the speakers have an internal power supply that consumes minimal standby power. However, if you plan to be away for an extended period, unplugging is recommended for safety.
How do I adjust the spikes on the base?
Unscrew the lock nuts, then adjust the spikes by turning them clockwise to raise or counterclockwise to lower. Tighten the lock nuts once level.
Can I mount the speakers on a wall?
No, the Martin Logan Preface is a floorstanding speaker and is not designed for wall mounting. Use the provided base on a stable, level floor.
What is the recommended break-in period?
Allow approximately 50-100 hours of normal listening for the speakers to reach their full sound quality. During this time, components settle and the soundstage opens up.
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Brand : Martin Logan
Model : Preface
Category : Uncategorized