Spire - Speaker Martin Logan - Free user manual and instructions
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| Product Type | Hybrid Electrostatic Loudspeaker (ESL panel + powered woofer) |
| Dimensions (H x W x D) | 60 in x 13 in x 20 in (152.4 cm x 33 cm x 50.8 cm) |
| Weight | 95 lbs (43.1 kg) each |
| Power Handling | 300 W continuous, 600 W peak |
| Frequency Response | 25 Hz - 22 kHz ± 3 dB |
| Impedance | 4 ohms (nominal), minimum 1.6 ohms |
| Sensitivity | 90 dB / 2.83 V / 1 m |
| Amplifier Requirements | 20 - 400 W per channel, stable into 4 ohms |
| Drivers | Curvilinear Line Source (CLS) electrostatic panel; 10" powered woofer with 200 W amplifier |
| Finish Options | Black gloss, Walnut, Cherry, or Piano Black |
| Features | Bi‑wiring / bi‑amping capable; integrated powered woofer; electrostatic panel with vacuum‑bonded film; Micro‑Perf stator |
| Cleaning | Use soft, dry microfiber cloth for panels; avoid liquids or abrasive cleaners. Dust grille gently. |
| Safety | Do not expose to moisture or excessive heat. Keep children away from electrostatic high voltage. Unplug before cleaning. |
| Spare Parts & Repairability | Contact Martin Logan or authorized service centers for replacement panels, woofers, or amplifier modules. Some repairs may require professional servicing due to high voltage. |
| General Information | Brand: Martin Logan; Model: Spire; Category: High‑end floorstanding loudspeaker. Designed for audiophile use. |
Frequently Asked Questions - Spire Martin Logan
What is the recommended amplifier power for the Martin Logan Spire?
The Spire performs best with an amplifier rated between 20 and 400 watts per channel, stable into 4 ohms. Use a high‑quality amplifier with good current delivery.
Can I place the Spire against a wall?
It is recommended to place the Spire at least 2‑3 feet from the front wall to allow the electrostatic panel to breathe and avoid bass boom. Side walls should also allow at least 1‑2 feet for optimal soundstage.
How do I connect the powered woofer?
The powered woofer has a dedicated AC power cord. Use the supplied speaker cables to connect the amplifier to the speaker terminals. The woofer receives signal from the same speaker input; no separate subwoofer cable is needed.
Can I bi‑wire or bi‑amp the Spire?
Yes. The Spire has separate binding posts for the electrostatic panel and the woofer. Remove the jumper straps to bi‑wire or bi‑amp. Ensure both amplifiers are identical in gain if bi‑amping.
How do I clean the electrostatic panel?
Use a soft, dry microfiber cloth to gently dust the panel. Do not use any liquids or sprays. For stubborn debris, use a compressed air duster. Never touch the membrane with fingers.
What is the break‑in period for the Spire?
Allow 100‑150 hours of normal listening for the electrostatic panel and woofer to fully break in. During this time, sound may improve in clarity and bass extension.
The speaker produces static or humming noise. What should I do?
Check that all connections are secure and that the speaker is not near sources of electromagnetic interference. Ensure the amplifier is properly grounded. If static persists, the panel may need cleaning or service.
Can I use the Spire in a home theater system?
Yes. The Spire works well as front left/right speakers. Set your AV receiver to 'Large' speakers for full‑range output. For best results, use a matching center channel like the Martin Logan Stage X.
How do I adjust the bass level?
The Spire has a built‑in powered woofer with a level control knob on the rear panel. Adjust to match your room acoustics and personal preference. Start at the 12 o'clock position.
What should I do if the speaker stops producing sound?
First, check that the power cord for the woofer is plugged in. Verify amplifier connections and that the amplifier is on. If only the panel is silent, the high‑voltage supply may require servicing. Contact Martin Logan support.
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Product information
Brand : Martin Logan
Model : Spire
Category : Speaker