Small bass driver - but how small?

[Zuhl]

I'm looking to start a new project for a small room. The room is 10' x 7'6". The room will be used exclusively for listening late night - it's the room furthest from the neighbours.

At one end I will be building an equalised sub using two SEAS L22s, with two small stand mounts a couple of feet down the room. I will be using the SEAS 22TAF/G for the tweeter, but, having not made a small speaker since I used a KEF B110 30 years ago, I'm unsure where to go next.

Ideally I'd be wanting sealed box, getting close to 100hz but maybe rolling off at 150hz. More importantly, what bass there is, albeit upper bass, needs to be crisp and clean. I'd like to keep the driver small, so would something like a 12cm fit the bill? Or would I need something larger like a 15cm? It doesn't need to play loud.

Thanks for any input.

 

[speakerdoctor]

If you don't have the sub drivers yet, save you money for a pair of Scanspeak 15W/8530K01's (15 cm O.D. okay?). Bass to 40 hz in a vented 15L box (60Hz sealed). The bass in that small room will be very impressive and provide great midrange as well.

 

[Bare]

Odd that you are eager / willing to add significant complexity in the form of twin Subs.
Subs are NOT neighbor friendly.. just to add insult to injury.
Perhaps using a speaker of enough size to produce decent bass would be a cleaner solution.
A quality 6" Full range driver could meet ..All.. your expectations as a simple elegant solution. Most certainly an 8 incher would
Audio goal posts have moved well downfield over the past 30 years.

 

[Zuhl]

My current room has a Peerless 12" XXLS sub and bass to 20hz. This room shares a wall with next door! I try to listen when they are not in...

The other room (much smaller) is not connected to the neighbours and so is relatively sound proof (at the levels I listen at). That's the reason for moving in there.

The L22s and 22TAFGs will be from an existing 3 way design which is too big for that room. I only need a small bass/mid to make a 2 way.

 

[sreten]

Hi,

A decent 12cm should do the job, the Seas L12
in a very small box if used sealed, see here :

Zaph|Audio, tweeter here :
http://www.zaphaudio.com/tweetermishmash/compare.html

rgds, sreten.

http://audio.claub.net/Simple Loudspeaker Design ver2.pdf
FRD Consortium tools guide
http://web.archive.org/web/20090902124715/http://geocities.com/woove99/Spkrbldg/DesigningXO.htm

 

[mayhem13]

Aurum Cantus Ac130F for a small sealed monitor crossed to a sub. The best dollar to performance ratio I know of in the 5.5" category. Digs very deep for its side so you can cross lower and avoid localization of your subs.....

 

[whgeiger]

VD is the measure...

I'm looking to start a new project for a small room. The room is 10' x 7'6". The room will be used exclusively for listening late night - it's the room furthest from the neighbours.

At one end I will be building an equalised sub using two SEAS L22s, with two small stand mounts a couple of feet down the room. I will be using the SEAS 22TAF/G for the tweeter, but, having not made a small speaker since I used a KEF B110 30 years ago, I'm unsure where to go next.

Ideally I'd be wanting sealed box, getting close to 100hz but maybe rolling off at 150hz. More importantly, what bass there is, albeit upper bass, needs to be crisp and clean. I'd like to keep the driver small, so would something like a 12cm fit the bill? Or would I need something larger like a 15cm? It doesn't need to play loud.

Thanks for any input.

... and the question is how large will your constraints permit?
Regards,
WHG

 

[dragonweed]

SB acoustics SB12NRX25-4. In a 6.5 liter reflex box tuned to 52 Hz, you can get a -3 dB point of 51 Hz. It is a 4 ohmer, with rather lowish sensitivity, but the response is very clean to almost 10 kHz. For small rooms near-wall it is an excellent choice, mated to a decent 3/4" tweeter at around 4 Khz.

http://www.sbacoustics.com/index.php/products/midwoofers/4-sb12nrx25-4/