| Pi 7 and pi 6 [message #62666] |
Fri, 14 May 2010 15:39  |
dom_
Messages: 4
Registered: May 2010
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Esquire |
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Hi I was wondering if you could email both of these plans over to me?
My room is 15 feet by 23 feet with a 9 foot ceiling so not really sure which would be best.
Thanks
Dom
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| Re: Pi 7 and pi 6 [message #62706 is a reply to message #62685] |
Sat, 15 May 2010 18:07  |
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Wayne Parham
Messages: 18786
Registered: January 2001
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Illuminati (33rd Degree) |
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Both the six π and seven π cornerhorns have similar response, a slightly overdamped alignment which results in a gentle, gradual rolloff curve. This alignment is pretty room friendly, and tends to sound smooth in most rooms but, of course, some rooms are more troublesome than others. Where room modes are a problem, I would suggest running multiple subwoofers blended with the mains.
The choice of woofer isn't really a matter of alignment or room loading, since each of them are similar, with the same slightly overdamped response. The biggest differences are in cost and other things. Here is a sort of overview of each woofer option:
- Delta 12LF (used in the entry level three π and six π speakers) - ample bass, reasonably smooth midrange and very cost effective
- Omega 15A (used in the entry level four π and seven π speakers) - cast basket, higher efficiency and power handling
- TD12S (used in the high-end three π and six π speakers) - much smoother midrange, lower distortion and better thermal control
- 2226H (used in the high-end four π and seven π speakers) - much smoother midrange, lower distortion and higher efficiency
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| Re: Pi 7 and pi 6 [message #62817 is a reply to message #62685] |
Thu, 20 May 2010 18:02 |
PaulW
Messages: 71
Registered: May 2009
Location: UK
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Viscount |
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| dom_ wrote on Sat, 15 May 2010 02:33 | Do you think it would be more sensible to go with the 12" driver in that size room?
I was reading up on PaulW's log on hifiwigwam and he seemed to have some fun taming the bass in his room.
edit: woops! actually measured my room it is 13x17x9feet. Seems my guess was miles out 
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Hi Dom - given that you are already using a large pair of Tannoy's I would expect any bass issues to be the same as you currently are experiencing! As for me, going back over the whole process, the bass problems were more than just room based.
The standard power amp transformers were fairly low spec on the Paramours - magneQuest transformers go deeper, but exhibit far better control.
I was not used to hearing those room modes in anything other than perhaps a positive benefit for my tiny speakers - gave them a much needed bass boost.
The room itself is very solidly constructed and a bit 'unforgiving'
Now the multisub approach really did work - borrowed a few subs from people, but dismissed this as I didn't want all the extra wiring runs, plus only one sub was 'auto on' and switching on the turntable, CD player, phono stage, preamp, two power amps all followed by 3 extra subs was not for me! In the end I went for passive bass traps.
Paul
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