General Information 25
System Frequency Response:
29–23,000 Hz ± 3db
Dispersion
Horizontal: 30 Degrees
Vertical: 44” (112 cm) line source
Sensitivity
91 dB/2.83 volts/meter
Impedance
Nominal: 4 ohms
Minimum: 0.8 ohms @ 20 kHz
Crossover Frequency
320 Hz
Components
Custom-wound audio transformer, air core coils, poly-
propylene capacitors
Woofer Type
10” (25.4 cm) cast basket, high excursion, aluminum
cone with extended throw driver assembly, non-reso-
nance asymmetrical chamber format
Woofer Amp Power
200 watts/channel (4 ohms)
Controls
Bass: ±10dB at 35Hz
Light: Three Position Light Intensity Switch
Power Handling
250 watts per channel
Signal Inputs
Custom bi-wire binding posts
Mains Power Draw
Standby: <1W each
Idle: 8W each
Max: 150W each
Weight
58 lbs. each (26.3 kg)
Size*
59” h × 12.5” w × 17.75” d (150 h × 32 w × 45.1 d cm)
*For detailed dimensional drawings, please see page 26.
Your Spire speakers are provided with an automat-
ic Limited 90 Day Warranty coverage. You have the
option, at no additional charge, to receive a Limited
5 Year Warranty coverage. To obtain the Limited
5 Year Warranty coverage you need to complete and
return the Certificate of Registration, included with your
speakers, and provide a copy of your dealer receipt, to
MartinLogan within 30 days of purchase. For your conve-
nience MartinLogan also offers online warranty registration at
www.martinlogan.com.
MartinLogan may not honor warranty service claims unless
we have a completed Warranty Registration on file! If you
did not receive a Certificate of Registration with your new
Spire, speakers you cannot be assured of having received
new units. If this is the case, please contact your autho-
rized MartinLogan dealer.
Serial Number
Spire’s serial number is located near the bottom of the
backplate. Each individual unit has a unique serial number.
Service
Should you be using your MartinLogan product in a country
other than the one in which it was originally purchased,
we ask that you note the following:
1 The appointed MartinLogan distributor for any given
country is responsible for warranty servicing only on
units distributed by or through it in that country in
accordance with its applicable warranty.
2 Should a MartinLogan product require servicing in
a country other than the one in which it was origi-
nally purchased, the end user may seek to have repairs
performed by the nearest MartinLogan distributor, sub-
ject to that distributor’s local servicing policies, but all
cost of repairs (parts, labor, transportation) must be
born by the owner of the MartinLogan product.
3 If, after owning your speakers for six months, you
relocate to a country other than the one in which
you purchased your speakers, your warranty may be
transferable. Contact MartinLogan for details.
*Specifications are subject to change without notice.
general InformatIon
Specifications* Warranty and Registration
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