A seller of 3.7i says: "The "i" version is easily identified by the 2-1/2" wide stripe on the backside of the mid-range driver as pictured."
This appears to be a bit of material for attenuation of rear-wave of the midrange.
I also hypothesize (only from descriptions) a lower tensioned bass panel.
I hypothesize no crossover changes. (Because Magnepan is cheap and changing XO would mean parts & inventory changes).
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Topic - a crack in the magnepan 3.7 -) 3.7i upgrade mystery? - DrChaos 16:26:34 05/20/15 (36)
- This was posted in the Facebook MUG... - MWE 15:06:30 05/24/15 (2)
- RE: This was posted in the Facebook MUG... - DrChaos 13:45:57 05/25/15 (1)
- RE: This was posted in the Facebook MUG... - MWE 14:56:29 05/25/15 (0)
- RE: a crack in the magnepan 3.7 -) 3.7i upgrade mystery? - Swamis Cat 10:45:25 05/21/15 (29)
- RE: a crack in the magnepan 3.7 -) 3.7i upgrade mystery? - Hasse 00:25:13 05/23/15 (0)
- interesting thoughts - wazoo 20:05:46 05/21/15 (26)
- RE: interesting thoughts - Swamis Cat 08:41:44 05/22/15 (3)
- even more 'interesting' - wazoo 06:05:28 05/23/15 (2)
- RE: even more 'interesting' - josh358 07:41:48 05/24/15 (1)
- It got re-purposed. - wazoo 17:32:36 05/24/15 (0)
- RE: interesting thoughts - andyr 21:21:54 05/21/15 (21)
- RE: interesting thoughts - josh358 07:39:35 05/24/15 (3)
- RE: interesting thoughts - Davey 07:50:23 05/24/15 (2)
- RE: interesting thoughts - josh358 07:57:20 05/24/15 (1)
- RE: interesting thoughts - Davey 09:00:17 05/24/15 (0)
- indeed - wazoo 06:01:19 05/23/15 (16)
- RE: indeed - Swamis Cat 13:59:12 05/23/15 (14)
- RE: indeed - josh358 07:35:17 05/24/15 (13)
- RE: indeed - Swamis Cat 14:25:10 05/24/15 (12)
- RE: indeed - josh358 15:30:05 05/24/15 (11)
- RE: indeed - Swamis Cat 09:58:52 05/25/15 (10)
- RE: indeed - josh358 11:44:13 05/25/15 (9)
- RE: indeed - Swamis Cat 09:09:19 05/26/15 (8)
- RE: indeed - josh358 07:35:58 09/06/15 (7)
- Who are you??? And why are you posting on this board??? - Mark Man 08:45:57 09/06/15 (6)
- RE: Who are you??? And why are you posting on this board??? - josh358 09:00:27 09/06/15 (5)
- RE: Who are you??? And why are you posting on this board??? - Roger Gustavsson 11:01:01 09/06/15 (4)
- RE: Who are you??? And why are you posting on this board??? - josh358 17:12:43 09/07/15 (3)
- RE: Who are you??? And why are you posting on this board??? - Roger Gustavsson 21:37:21 09/07/15 (2)
- RE: Who are you??? And why are you posting on this board??? - Satie 22:37:56 09/07/15 (1)
- RE: Who are you??? And why are you posting on this board??? - Roger Gustavsson 06:00:20 09/10/15 (0)
- RE: indeed - Davey 08:30:29 05/23/15 (0)
- RE: a crack in the magnepan 3.7 -) 3.7i upgrade mystery? - Norman M 14:30:47 05/21/15 (0)
- RE: a crack in the magnepan 3.7 -) 3.7i upgrade mystery? - Roger Gustavsson 10:39:38 05/21/15 (0)
- RE: a crack in the magnepan 3.7 -) 3.7i upgrade mystery? - JBen 17:36:00 05/20/15 (1)
- RE: a crack in the magnepan 3.7 -) 3.7i upgrade mystery? - Tom ยง. 19:07:35 05/20/15 (0)