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sa660
06-25-2003, 06:32 AM
I have an offer for a pair 7 2217H at a good price $300 a pair.
Can these be used for a 2 way monitors?
They were used in the array 4893 LF enclosure down to 38hz.

I am thinking about a 2 way dual 2217H+2450J with 2397 or 2380 horn


Comments will be appreciated?

herve M
03-11-2005, 01:14 PM
I have an offer for a pair 7 2217H at a good price $300 a pair.
Can these be used for a 2 way monitors?
They were used in the array 4893 LF enclosure down to 38hz.

I am thinking about a 2 way dual 2217H+2450J with 2397 or 2380 horn


Comments will be appreciated?

How to obtain the 2217h? To always sell? test with 14 is interessant. http://c.wanadoo.fr/z.gif
http://c.wanadoo.fr/z.gif
HerveM:)

Earl K
03-12-2005, 09:33 AM
Comments will be appreciated?

Hi Richard,

- If you can buy 2 pairs of these things for $700. , then I think it's a decent investment .

- Even though the speaker is used as a subwoofer , I'm more inclined to classify it as a 14" version of a 2226 ( which I view as a woofer - forget the "sub" part of the phrase ).

- The 2226h & 2217h share a very similar ( if not identical ) magnetic assembly. They also share the same Qts, a pretty close Fs ( the 2217 is higher which is understandable since it has a lighter cone ), identical Xmax, identical rated power handling (Re), identical magnetic Flux values, identical DCR of the voicecoil, very close Le values, & just about the same BL . To my eyes, all in all the 2217 is a 2226 , "performance" engineered into a 14" basket . To get such a similar response ( from the numbers ). that is comparable to the 2226 , translates into a less efficient speaker ( think 94 or 95 db instead of 97 db )

- To my knowledge, there is no published Frequency Response for this woofer , so buying it means you are taking some chance. That said, I'd use a modified response from the 2226 as my guide for it's midrange performance .

- I would use 2 of these a side in a MTM setup crossed at 800 hz. I think the 2397 is the better horn of the two mentioned .

- I think that you'll need to biamp "only" this setup / twin "H" speakers mated to a "J" compresson driver just won't "play nice" together if you build a Hi Frequency "lift EQ" for the horn ( - if you decide its' needed ) .

- I've run SIMS of the MTM boxes. I'll post the SIMS later today .

- Essentially, what "looks" good is a "Stagger Tuning", along the lines of what the M9500 uses .

Top Box = 2.5 cu' ( 70.8 litres ) tuned to 50 hz with (2) 101.6 mm (4") ports that are 171.45 mm ( 6.75") deep/long .

Bottom Box = 4.0 cu' ( 113.27 litres ) tuned to 40 hz with (2) 101.6 mm (4") ports that are 165.1 mm ( 6.5") deep/long .

:cheers:

Earl K
03-12-2005, 10:56 AM
OOOOPPPSSS


- Just became aware of the date on Richards' original posting .

- I guess that purchase opportunity has passed . :D

- My bad :blink:

sa660
03-14-2005, 03:01 AM
Never mind the date, all very good informantion?
This is a hobby it can move very very slow.

Thank you.

Earl K
03-14-2005, 09:27 AM
Hi Richard,

- Just to finish up on this thought , here are a couple of SIMS .
- You can see that this arrangement gives nice solid response to @ 40hz .
- The bottom SIM simply indicates that both these tunings retain the 2217h(s)' ability to deliver maximum power (spl ) since the Xmax values never go into overexcursion ( above the box tunings ) .

- At the point where the 2 traces cross ( @50hz ) one could expect up to 3 db of "addition" - if the two woofers were in perfect phase. Since they aren't , the addition will be less than the 3 db maximum . At a 55° differential, the summing of these two vectors ( bass energy at that one point ) should be less than 1.5 db.

- I'd have to play in real time with the upper boxes tuning to get the nicest " bass addition" at that 50hz point. ( At that crossong point , one would want the most seemless addition . )

- A "target" phase differential ( I think ) would be 45° - maybe less ( 30° ? ).

- To "close that phase gap" , the upper box would need to be tuned a few hz lower ( @ 47hz ) . This does "steal" some mid-bass energy ( & creates more of a midband droop ). That's the trade-off .

:D

herve M
05-09-2005, 02:49 PM
Hello earlK, Can I recone 2217h with C8R1400nd kit ?:hmm:

Herve

Earl K
05-09-2005, 03:02 PM
Can I recone 2217h with C8R1400nd kit ?

- Really, I don't know ;
- But, I highly doubt it because they have different thickness top-plates ( I think) - I'll need to review that assumption .

- I suspect that the 2217H can be reconed into a le14h-3 / but I don't 'know" for sure.


<> :)

4313B
05-12-2005, 11:44 AM
Herve - as per your PM

"The cones for the 1400ND or the 1400Pro are not interchangeable with 2217H."

4313B
05-12-2005, 11:57 AM
1400Nd

4313B
05-12-2005, 11:58 AM
1400Pro

4313B
05-12-2005, 11:58 AM
2217H

herve M
05-12-2005, 12:36 PM
Herve - as per your PM

"The cones for the 1400ND or the 1400Pro are not interchangeable with 2217H."

Thank you for quick reponse , Giskard! Suggestion for recone 2217 (c8r2217, yes), le14h1 or h3 ? for system style DMS: 2 woofer +compression driver 1,5".
or 2 way MTM :2235+2217 in parallel + 1,5" ??:banghead:

Hervé