home ambience sound loudspeakers

Zeverin

Member
2007-10-31 10:16 am
Hi all.

I have a friend that wants to spread some loudspeakers in various divisions of his house.

His budget is very very tight. We know that problably would be cheaper to get some low cost speakers rigth of the store, but he has some aesthetics requirements.

He already got one amplifier and one equalizer, we only need to get the loudspeakers.

My ideia is to get some nice full range drivers and build the appropriate enclosure.

Right know I'm thinking in using the TB W4-657D driver.

DIAPHRAGM MTL Alum/Mg
SURROUND MTL Rubber
NOMINAL IMPEDANCE 8 W
DCR IMPEDANCE 6 W
SENSITIVITY 1W/1m 88 dB
FREQUENCY RESPONSE 65-15K Hz
FREE AIR RESONANCE 65 Hz
VOICE COIL DIAMETER 25.4 mm
AIR GAP HEIGHT 6 mm
RATED POWER INPUT 20 W
MAXIMUM POWER INPUT 40 W
FORCE FACTOR, BL 5.77 TM
MAGNET WEIGHT (10.08
oz) 305 g
MOVING MASS 4.61 g
FERRO FLUID ENHANCED No
SUSPENSION COMPL. 1297 uMN-1
EFFEC.PISTON AREA 0.0057 M2
Levc 0.111 mH
Zo 70 ohm
X-max 3.30 mm
Vas 5.98 Litr.
Qts 0.32
Qms 5.79
Qes 0.34

W4-657.gif

W4-657-B.gif


As you can see the cost of each driver is 30€ plus shipping. With the cost of wood and paint we achive the budget limit for my friend.
This leaves no money to create a passive filter to correct the freq. response.

Do you think that is a good option if I correct the response curve with the equalizer? I could antenuate in 5-6dB the response in the peak region between 5KHz and 8KHz, and raise a bit around 3 KHz.
Do you think that the overall sound quality will be ok?
 
By shear coincidence I have just installed a pair of W4-657D in double bass reflex enclosures based on a Fostex design for the FE127. Bass is excellent but top end was a bit too strident for my liking and considered a 5dB notch filter centered on 7K. Instead I tried a 0.27mH series inductor to give a gentle roll-off from about 4K. This has tamed the top end very successfully resulting in a speaker I can happily listen to for extended periods without fatigue.

The Fostex enclosure plan can be found here:

http://www.fostexinternational.com/docs/speaker_components/pdf/recom_enclose/127e_enclrev.pdf
 

preiter

Member
2006-05-07 12:50 am
Hi all.

I have a friend that wants to spread some loudspeakers in various divisions of his house.

His budget is very very tight. We know that problably would be cheaper to get some low cost speakers rigth of the store, but he has some aesthetics requirements.
What is the max size he is willing to live with? What frequency range do you expect to cover? How powerful is the amp (i.e. how efficient do the speakers need to be?) Will the speakers be up against the wall or can they be out a bit?
 
Not suitable for a really tight budget, the new Mark Audio Alpair6s would fit your box requirements. (the metal cone one will fit into 1.5 litre).

Less expensive: I made a recent suggestion for a 2 litre cabinet for the Fountek FR88

Even less: 4 versions of the Aurasound NS-3-193. I've had these in ~1.25 litre sealed and really liked them.

PE sells a slightly larger version of the Aura -- haven't tried it.

dave