options for DIY sealed enclosure FullRange?

gobble

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Dear All

An important part of my long term goals has been to use wall mounted speakers at about 7ft height or more.

I have never been comfortable with speakers projecting themselves into my living space 4 ft out from the rear wall. Apart from imposing themselves upon me ("why are you dominating me" kinda oppressed feeling :o), I also feel they distract from the enjoyment of pure listening by making one obsess about the gear one owns. Not to mention the expensive real estate space saved - typically 10ft by 5ft can be freed up for daily activites.

The perfect driver for me would have been one I already purchased - the 2" FR Jordan JXR6-HD (JXR6 HD). It takes a simple 2.4ltr sealed enclosure without needing complex TL or horn design for the carpentry and time challenged, and reputedly goes down to 100hz from 30khz - Maybe not with a sense of authority, but I have a REL T5 subwoofer now to fill in the upper bass and add authority if the speakers lack it at the bottom end. The JXR6 has the added advantage that it is recommended to be placed right at the wall for baffle step compensation or something, to give the best SQ. Suits my requirement perfectly in theory!! :clapping:

Unfortunately it is only 85dB efficient (sensitivity not published). And given that I will embark on my Tube amp DIY project later this month that spits out 8.5 watts max it does not look like a good pairing to achieve any kind of macro-dynamics.

Therefore I am now searching for a 4" or less FR driver that requires a similar simple sealed enclosure and with a sensitivity and efficiency greater than 90dB. One that is meant to be placed right against the wall by design for best SQ.

Would like some suggestions on what drivers I can look at buying.

Another question I have that I need enlightenment about is whether the efficiency+sensitivity figures pose an absolute challenge? For example is a 2" driver at 85dB equally difficult to drive as a 5" driver at 85dB?
The idea being - if the small size of the speaker means less of a load on the amp, the macro-dynamics may not really suffer too much with a low power tube amp, and I can use the JXR6 itself.

Thanks very much for your suggestions and pointers.

--G0bble
 
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tough call, most of the 3-4" FRs have low eff. fostex have a few that are in range of something like 86-89db. not many will fit into a 2.4 litres.

I am using a similar configuration with my desktop. alpair 7mk2 in sealed 6.2 litres, with a sub with a topping amp. works fine for nearfield. not very loud, i dont go beyond 12-1 o'clock on the amp. crossed over at 120hz. it sounds much better at night when the ambient noise is much lesser.

whats your source, how are u feeding the sub, and how are u high passing the mains. what's your room size.

if you want really small size, only 4" that might fit the bill would be chr70/el70.
 
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