Need help?Do you have a question about the MartinLogan Helos 12 and is the answer not in the manual?
Audio Specifications| system frequency response | 47–20, 000 Hz ± 3 dB |
|---|---|
| sensitivity | 89 dB @ 2.83 volts/ meter |
| impedance | 4 Ohms. Compatible with 4, 6, or 8 Ohm rated amplifiers. |
| crossover frequency | 2, 800 Hz |
Driver Specifications| high-frequency driver | 1” (2.5cm) neodymium soft dome |
|---|---|
| low-frequency driver | 6.5” (16.5cm) high-rigidity aluminum cone with extended throw drive assembly, thermal protection. |
| binding post inputs | Push style binding posts, accommodates wire up to 5AWG. |
Power and Amplification| suitable amplifier range | 20–200 watts |
|---|---|
| maximum power handling | 100 watts |
| components | Custom air core coils, polyester caps |
Weight and Dimensions| weight | 4.5 lbs. (2 kg) |
|---|---|
| overall size | 9.1” x 4.6” (23.1cm x 11.8cm) |
| required opening with tolerance | 8.35” (21.2cm) |
| projection from wall surface | 0.2” (4.5mm) |
| depth behind wall surface | 4.4” (11.2cm) |
Audio Specifications| system frequency response | 47–20, 000 Hz ± 3 dB |
|---|---|
| sensitivity | 89 dB @ 2.83 volts/ meter |
| impedance | Mono: 4 Ohms. Compatible with 4, 6, or 8 Ohm rated amplifiers. Stereo: 8 Ohms per channel. Compatible with 4, 6, or 8 Ohm rated amplifiers. |
| crossover frequency | 2, 600 Hz |
Driver Specifications| high-frequency driver | Two 0.78” (1.9cm) neodymium soft dome |
|---|---|
| low-frequency driver | 6.5” (16.5cm) high-rigidity aluminum cone with extended throw drive assembly, thermal protection. |
| binding post inputs | Push style binding posts, accommodates wire up to 5AWG. |
Power and Amplification| suitable amplifier range mono | 20–200 watts |
|---|---|
| suitable amplifier range stereo | 20–100 watts per channel |
| maximum power handling mono | 100 watts |
| maximum power handling stereo | 50 watts/channel |
| components | Custom air core coils, polyester caps |
Weight and Dimensions| weight | 4.5 lbs. (2 kg) |
|---|---|
| overall size | 9.1” x 5.1” (23.1cm x 12.8cm) |
| required opening with tolerance | 8.35” (21.2cm) |
| projection from wall surface | 0.2” (4.5mm) |
| depth behind wall surface | 4.9 po (12.3 cm) |
Guidance on optimizing sound imaging and placement flexibility in any location.
How room acoustics affect frequency performance and how to adjust using soft surfaces.
Advice on selecting installation spots between ceiling joists, avoiding obstructions.
Tips on how corner placement affects bass and when to avoid it for balanced output.
Steps to diagnose and resolve issues with no sound from speakers.
Troubleshooting tips for inadequate bass response or sound stage issues.
Details on the 90-day and optional 5-year warranty coverage.
Information on where to find the product's serial number on the unit or carton.
Guidelines for international service and warranty transfer.
To Next Page