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Old 22nd October 2013, 10:47 AM   #161
zman01 is offline zman01  Bangladesh
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platplass,

Pensil's on walls might result in too much LF gain - just a guess.

You can take a look at the "Half Tower" designs on P10's community website -there are a couple of wall-mount options - they will be under the home theatre appendix IIRC.

Alp 7.3 should be usable with some minor port tuning changes - however late Scott and Dave comment on that.
 
Old 22nd October 2013, 04:15 PM   #162
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Box alignment remains the same as long as you maintain internal height, cross-section, driver offset, vent area and placement.

As Zia says such placement will likely result in too much lift at the bottom. Some offset of this should be possible with increased damping.

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Old 22nd October 2013, 06:42 PM   #163
chrisb is offline chrisb  Canada
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I'd also advise against going too shallow to accommodate on-wall installation - every very shallow enclosure I've built suffered from a bit of "nasal congestion" most notable on vocals that stuffing didn't cure.

The very thin / light weight metal cones of the 7.3s would probably be even more sensitive to that than a paper cone of approx same size - such as the EL or CHP70s - but that's just conjecture on my part.

And of course, if wall mounted means significantly above floor level and not inverted to load to ceiling, then some loss of boundary loading would likely occur that would offset that from the wall? Again, conjecture - best pondered by the smart guys.
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Old 22nd October 2013, 07:33 PM   #164
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Thanks for all the responses.

Dave - by cross-section, does that mean as long as one keeps the same cross-sectional area?

Anyone venture to guess a good minimum depth?
 
Old 22nd October 2013, 07:52 PM   #165
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Quote:
Originally Posted by platplaas View Post
by cross-section, does that mean as long as one keeps the same cross-sectional area?
Anyone venture to guess a good minimum depth?
Yes.

140mm.

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Old 19th November 2014, 08:10 AM   #166
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I'm going to build a pair of pensil alpair 7.3 for my home theather system and I was thinking of building the center channel with a chr70 driver... is a recommended choice or a bad idea?
 
Old 19th November 2014, 08:32 AM   #167
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If i were you, i'd stick to all A7.3 across the front.

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Old 19th November 2014, 08:42 AM   #168
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Thank you for your response.
But where I can find a project for the center channel with the A7.3 driver?
I also noticed that the 7.3 are always sold in pairs ...
 
Old 19th November 2014, 07:10 PM   #169
chrisb is offline chrisb  Canada
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yes, there is a small center channel enclosure for the 7.3

yes, they are normally only sold in pairs

yes to using the same driver model across the front row - I've done that twice now -with A7.3 and A10P
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Old 19th November 2014, 07:44 PM   #170
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yes, they are normally only sold in pairs
I'm pretty sure Madisound will sell you a single. Andprobably CSS. And i will sell single A7.3eN (reducing the number of unmatched singles on my shelf)

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