PolkAudio AMR90 Speakers
Introduction
Polk is throwing
themselves into the multichannel multimedia market with the introduction of
their AMR90 model. Touting 4 channels and a subwoofer, this space saving design
has an adjustable bass control and a front/rear balance control in addition
to the mandatory volume control. If space is at a premium, the tiny satellites
may fit right in as they are the smallest things I've seen to date. Though
they are helpfully angled upwards, placing them directly on your desktop will
send you scrambling for "angling" material or at least one pair
of 4"-6" stands.
Factory
Specifications
|
The
Unit
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- Power Output:
30W total
- Frequency
Response: 40Hz-18KHz
- AC Adapter:
30 VA
- S/N Ratio:
>90dB
- Output:
100dB SPL @ 0.5m
- Warranty:
1 year
- Tentative
price: $109.95 USD
|
|
Description
& Specifications
The satellite
units were impossible to open without damaging, so please excuse the lack
of "baffle-less" sat pics. Somewhat to that end, the subwoofer was
more or less fixed to the grille via wood goop from the inside. I could
ascertain the typical impedance measurements; however, the usual woofer amp
output power could not be directly measured.
The AC adapter
has a strange "lip" on its top that protrudes directly in the ground
pin path of some power strips. As there is no screw hole in it, I must question
why it's there. Rated to deliver 30 VA (12VAC x 2.5Amps), it might not be
required to supply that amount of power due to the stranger input level requirements,
but I get ahead of myself.
The
power button is located on the subwoofer. The second power button is located
on the right-hand satellite as pictured to the left. It's like having two
keys to start a car. Insert and turn the first one, then insert and turn on
the second one. Different, but I suppose there are weirder things in life.
The sat's
rear has a port in addition to the subwoofer. You can have bragging rights:
"Hey Joe, my system has five holes! How many you got?" At least
the sat's holes do aid in lower midrange output so they are fully functional.
Don't stuff anything in there like used Kleenex. ;-)
At the time
of this writing, I had to contact PolkAudio's PR department to request a price
as the AMR90's aren't listed on their website and a PriceWatch
search came up dry. The list of $109.95 may end up hovering around the $95-$99
mark by the time dealers are stocked so keep an eye out for possible large
price swings.
Objective
Measurements
Data acquired
and reported of this type is done without any opinion or bias whatsoever.
For a quickie brush up course on audio terminology and measurements, point
your browser to the Audio
Reproduction Systems article.
Subwoofer
Woofer
Impedance
Frequency
(Hz)
|
Voltage
(V)
|
Current
(mA)
|
Impedance
(Z)
|
75
|
1.04
|
174
|
5.97
|
100
|
1.01
|
210
|
4.81
|
125
|
0.996
|
223
|
4.47
|