This Bed Room Design Example
Home ] Up ]

ACOUSTIC TRANSDUCERS LABORATORIES ®

©

Since 1968,

offering the many gifts of music… and of sound with sight… enjoyed by all, all of the time

through innovative, knowledgeable, high value, high-fidelity A/V system designs.


 

The Bed Room

 

As in the Family Entertainment room, the design of this bed room audio/video entertainment center was fairly straightforward; the construction was not.

 

After talking with the clients about what their needs were, and after studying the acoustics and layout of the room; the positioning of the TV with a simple 2.(1) speaker system in the bed room and an adjoining bath room 2.0 speaker system were straightforward although somewhat unconventional because of the wall and ceiling construction.  But, after some research in the attic (and in the wall), a workable solution was found. 

 

The nearby closet housed the electronics and remote controls.


The Adjoining Bath Room

 

As in the bed room, the design of this bath room audio system was fairly straightforward; the construction was not.

 

After talking with the clients about what their needs were, and after studying the acoustics and layout of the room; the positioning of the simple 2.0 speaker system in the adjoining bath room was straightforward although somewhat unconventional because of the double door construction.  But, after some research in the attic (and in the wall), a workable solution was found.

 

The nearby closet housed the electronics and remote controls.

 

These on-wall speaker systems use the specially selected subwoofer in the adjoining room to provide the needed bass.

 

And the music source selection (including the FM channel) and the speaker system loudness level can be changed in this room via remote control.

 

Notice that they are not pained to match the wall as the in-wall speaker systems in the bed room were - and there is a very good reason why they were not.  


 

The components and equipment:

  • 2 Parasound C65 v2 in-wall loudspeaker systems with customize baffling

  • 2 Polk Audio on-wall loudspeaker systems

  • NHT SW2Si and NHT SA2 powered subwoofer set with customized driver and vent.

  • Panasonic TH-42X60U TV with customized acoustic absorbtion panels

  • Sony CDP-CX235 200 CD player

  • Newcastle (Inkel) R-871 receiver

  • Panasonic DMP-BD60 Blu-Ray, DVD, and CD player

  • Logitech Hamony One remote control with custom programming to operate 4 different systems

  • 2 remote command repeaters

  • Specialty in-wall wiring


What Custom Calibration (and Good Execution) can do

The two pictures below show what a knowledgeable custom design can produce.

The left picture is of the frequency response of the system after installation and with no calibration.  It shows a very good design and installation.  Notes:  Spikes and large valleys in frequency response are what you mainly want to eliminate.  Notice that there are three: 200 Hz (makes male voices sound the singer is getting a cold), 4k-5k Hz (makes females voices sound like the singer is in a tunnel), and 16k-20k Hz (makes the music sound like it is being played through wax paper, and with the proximity of the valley, vocalists will sound like they are spitting).

The right picture is of the frequency response of the system after installation with calibration.  It shows an excellent design and installation.  Notes: After reducing those spikes and valleys, what you usually want is a gentle roll-off in the high frequencies stating at about 2k Hz because most tweeters are harsh sounding, and what you do NOT want is an accented low end - it's fun in the beginning, but very bothersome shortly thereafter.  As you can see, there is a slight roll-off.  We could have rolled off the high-end more with the treble tone control, but chose to leave it alone since Parasound uses a very good tweeter.  And, when we want to, we can use the bass control to add low-end or not - with a correctly designed, correctly installed, and correctly calibrated high-fidelity system, you have choices.

P.S. We will be adding this performance test for the other demonstration rooms as they are recalibrated.


An Example of the Design Process

After doing further consideration, we realized that the music source in the Master Bedroom will be different than any other room.  The need will be a large variety of specialized music.  So, we needed to add a CD jukebox.  We chose a Sony CDP-CX235 200 CD player that was acquired for about $50 at a garage sale.  The unit was performance and life tested, and cleaned up before installation.  But, it’s not just like plugging in another piece of equipment.  In this custom system change, it took:

  • About 36 different pieces of equipment.

  • About six hours of direct design time.

  • About two hours of programming time.

  • About 12 hours of construction time (things never go as easy as hoped).

But, now that this system modification has been done, most of what was learned is now “indirect” time – the kind of custom design time that our customers are NOT charged for because they get the benefit of the research and experience our design team has done on previous system designs and installation since 1968.


 

To contact us:

Craig Rutten, Senior System Designer 

craigrutten@AcousticTransducersLaboratories.com

3917 Kristencreek Ln

Round Rock, TX 78681-1001

Phone: 512-547-2410

General e-mail: info@AcousticTransducersLaboratories.com

Consultation by appointment.  Closed: Sunday & Monday


2014 © Copyrighted by Craig Rutten. All rights reserved. Background tile from http://www.grsites.com.

Last updated: December 23, 2013 .