What's new

Polk Rti A9 as Center (1 Viewer)

Joined
Mar 31, 2013
Messages
41
Real Name
Swaroop
Having Polk Rti A9 as main Left and Right speakers, is it a good idea to have another Polk Rti A9 as Center?


If so is it okay to have it lying on a table horizontally? As it is floor standing speaker will this have an impact on its performance?
 

Robert_J

Senior HTF Member
Joined
Aug 22, 2000
Messages
8,350
Location
Mississippi
Real Name
Robert
3 identical speakers for your front stage is ideal.


Depends on the crossover. If it was designed to have good horizontal dispersion of sound when in its normal, upright position, then the dispersion of sound will be vertical when on its side. Basically, you would have to sit directly in front of it for it to sound good.
 
Joined
Mar 31, 2013
Messages
41
Real Name
Swaroop
This what the spec says.


Electrical Crossover - Midbass/wooferCrossover Frequency 120 Hz


Are you saying it is not a good idea to have Rti A9 on its side?
 

Robert_J

Senior HTF Member
Joined
Aug 22, 2000
Messages
8,350
Location
Mississippi
Real Name
Robert
swaroopchanda said:
Are you saying it is not a good idea to have Rti A9 on its side?
I'm saying that I don't know without more information. Without an off-axis frequency response graph, it is a gamble to do this unless you can sit directly in front of the center channel.
 
Joined
Mar 31, 2013
Messages
41
Real Name
Swaroop
This is what I found online


HT Labs Measures: Polk RTi A9 Speaker System

L/R Sensitivity: 90.5 dB from 500 Hz to 2 kHz

Center Sensitivity: 89.5 dB from 500 Hz to 2 kHz

Surround Sensitivity: 88 dB from 500 Hz to 2 kHz


image: http://cdn.soundandvision.com/images/archivesart/908polk.3.jpg
908polk.3.jpg

This graph shows the quasi-anechoic (employing close-miking of all woofers) frequency response of the RTi A9 L/R (purple trace), DSW Pro 600 subwoofer (blue trace), CSi A6 center channel (green trace), and FXi A6 surround (red trace). All passive loudspeakers were measured with grilles at a distance of 1 meter with a 2.83-volt input and scaled for display purposes.

The RTi A9’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +0.61/–2.91 decibels from 200 hertz to 10 kilohertz. The –3-dB point is at 49 Hz, and the –6-dB point is at 40 Hz. Impedance reaches a minimum of 4.49 ohms at 67 Hz and a phase angle of –49.39 degrees at 22 Hz.

The CSi A6’s listening-window response measures +2.17/–2.65 dB from 200 Hz to 10 kHz. An average of axial and +/–15-degree horizontal responses measures +2.06/–3.58 dB from 200 Hz

to 10 kHz. The –3-dB point is at 73 Hz, and the –6-dB point is at 63 Hz. Impedance reaches a minimum of 4.63 ohms at 5.3 kHz and a phase angle of –34.92 degrees at 105 Hz.

The FXi A6’s three-face averaged response in dipole mode measures +1.87/–3.60 dB from 200 Hz to 10 kHz. The –3-dB point is at 75 Hz, and the –6-dB point is at 61 Hz. Impedance reaches a minimum of 4.22 ohms at 9.4 kHz and a phase angle of –36.14 degrees at 108 Hz.

The DSW Pro 600’s close-miked response, normalized to the level at 80 Hz, indicates that the lower –3-dB point is at 44 Hz and the –6-dB point is at 31 Hz. The upper –3-dB point is at 100 Hz using the LFE input with controls at their defaults.—MJP

Read more at http://www.soundandvision.com/content/polk-rti-a9-speaker-system-ht-labs-measures#myC4S1CFKvBMrxpP.99
 

ChromeJob

Second Unit
Joined
Mar 19, 2014
Messages
368
Location
Durham, NC
Real Name
David S.
swaroopchanda said:
Having Polk Rti A9 as main Left and Right speakers, is it a good idea to have another Polk Rti A9 as Center?

If so is it okay to have it lying on a table horizontally? As it is floor standing speaker will this have an impact on its performance?
I think laying that speaker on its side will be more trouble than it's worth. Why not get the Csi A6?
 

Robert_J

Senior HTF Member
Joined
Aug 22, 2000
Messages
8,350
Location
Mississippi
Real Name
Robert
It should work based on this:

The RTi A9’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses)

The measurements were both horizontal and vertical. If you put the speaker on its side, it should sound the same.
 

Users who are viewing this thread

Latest Articles

Forum statistics

Threads
356,710
Messages
5,121,133
Members
144,146
Latest member
SaladinNagasawa
Recent bookmarks
0
Top