THIEL
HigherPlane 1.2
®
Coherent Source
in-ceiling loudspeaker system
OWNER INFORMATION
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POWER REQUIREMENTS
It is important to have enough power to play at the level you desire without distortion. If high sound levels are desired, the
HigherPlane 1.2’s are designed to be used with amplifiers rated up to 200 watts per channel (into 8 ohms). If you play the
speakers more loudly than the volume the amplifier can cleanly produce, the amplifier will produce overload (clipping)
distortion. The sound will become compressed, strained, and in extreme cases, obviously distorted. This distortion is actually
non-musical additional energy and since it is concentrated in the high frequency region where the speaker is least able to
handle it, tweeters can be damaged in extreme cases.
Keep in mind that sound quality is usually much more important than sound quantity. There can be large differences in the
sonic performance of two amplifiers of equal power, and this is more important than large differences in power. Most
everyone will be happier with a 100 watt amplifier of high sonic quality than a 200 watt amplifier of mediocre sonic quality.
For this reason, we feel there is no substitute for listening in making your amplifier decision.
The question “how much power do I need?” does not have the simple answer most people expect because it is not
determined only by the loudspeaker’s efficiency, but also by the volume desired and the size of the room. If all three factors
are average, about 100 watts per channel is required. Each factor can raise or lower this amount by about three times.
1) Usually, people who “don’t like music loud” can decrease their power to about one-half. Also, people who like music
loud should increase their power by 2 times or more. Most people fall within a normal range.
2) A speaker with a low efficiency of 84 dB/W-m will require twice the power of an average 87 dB/W-m speaker and one
with a high rating of 90 dB/W-m will require only half the power of an average speaker. The HigherPlane is of above
average efficiency (89 dB) and therefore requires less than an average amount of power for average volume levels.
3) A small room will need less power for a given loudness level than a large room. A very small room of 1000 cu ft (11' x
11' with an 8' ceiling) will require about half the power of an average size room. A large room of 6000 cu ft (20' x 30' with a
10' ceiling) will require twice the average power. If the listening room is connected to another room by a large open area, the
required power will increase, but not by the amount of the combined room volume. If the room has a “dropped” ceiling with
light panels, the ceiling will be almost transparent acoustically and the space above the ceiling should be added. If the panels
are heavy they will act as a more normal ceiling.
With all this in mind, a person who doesn’t like to play music very loudly and has a small room can get quality sound with
the HigherPlane with as little as 30 watts whereas a person who sometimes likes to play loudly and has a large room may
need 200 watts or more.
GRILLE
The HigherPlane 1.2’s grille is magnetically attached to the cabinet and can be removed by gently prying the grille forward.
PAINTING THE FRONT PANEL
Painting mask installed
The HigherPlane 1.2 is shipped with an off-white finish. The speaker can be
painted any desired color. To paint the speaker, first remove the grille and
insert the included painting mask to protect the driver. For the tightest seal, you
can slightly loosen the driver screws to tuck the rim of the mask between the
white rubber woofer surround and the plastic rim of the cabinet’s driver
opening. Also, peel the cloth scrim from the back of the grille before painting
its front surface. After the paint is dry, reinstall the grille’s scrim and the grille
onto the cabinet.
SERVICE
If your speaker system requires service, contact your authorized THIEL dealer. If you need to contact THIEL, service
information and technical support is available at (859) 254-9427, Monday-Friday, 8:30 a.m. - 5:00 p.m. Eastern Time, or via
e-mail at [email protected].
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THIEL HIGHERPLANE 1.2 SPECIFICATIONS
Amplitude Response
Phase Response
Sensitivity
75 Hz-20 kHz ±3 dB
Minimum ±10°
89 [email protected] V-1m
Impedance
4 ohms (3 ohms minimum)
30-200 watts
Recommended Power
Size
11.25 " diameter x 6.625 deep"
8 pounds
Weight
HIGHERPLANE 1.2 CABINET DIMENSIONS
Rough opening without preconstruction bracket is 10.25 inches in diameter
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LIMITED 10 YEAR WARRANTY
THIEL warrants every THIEL HigherPlane 1.2 system against defects in materials and workmanship to the original owner
for a period of ten years from the date of purchase. THIEL will, at no charge, replace any defective part and make any repairs
necessary to ensure its proper performance when the defective unit is returned to us postpaid.
This warranty does not cover damage due to accident or abuse and is void if the unit has been tampered with.
This warranty is automatic and no registration is required. This warranty gives you specific legal rights. You may also
have other rights which are particular to your state.
The following information is for your records.
Serial Numbers______________________________
Purchase Date_______________________________
Purchased From_____________________________
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THIEL
1026 Nandino Boulevard
Lexington, Kentucky 40511-1207
3/05
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