Manger + Tumult + R-DES = Full Range Speaker - diyAudio
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Old 29th August 2004, 07:12 PM   #1
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Default Manger + Tumult + R-DES = Full Range Speaker

I am just about to try and build two full range loudspeaker that:
+ Use a Manger unit (80Hz-35KHz)
+ Use A Tumult (14Hz - 400Hz)
+ R-DES equalisation for the Tumult, and cross it at 150Hz
+ A Phonic (or other) active crossover for the Manger at 150Hz

I intend to use one of the Tumult voice coils for the Left Bass, and the other for the LFE channel. The right speakers Tumult voice coils will be used for Right bass and LFE channel as well.

1) What I am wondering is whether an R-DES equalised bass from a Q=0.707 seal box would 'more musical'/better than the "130litre 16Hz tuned" ported box that was suggested by Dan in a ealier post (Karolina was interested in high output).

(Assume that the R-DES can equalise both responses so they look identical).

2) I read that the Zerobox (HF section using 3 Manger units) uses a first order crossover with impedance compensation.

The only crossovers for this that I have seen on the internet use resistors to reduce the Mangers sensitivity (I guess).

Given the choice do you think using an active crossover is likely to produce a better sound than a Capacitor/Inductor crossover feeding the Manger.

If the answer is just use a first order cross over circuit that "starts from 350hz", would you have any idea what the circuit would look like without any resistors. I am a little scared of using Theil small parametes as this unit doesn't work using principles governed by TS analysis.

3) Anyone else tried using Tumults for full range speakers have any experences/tips they would like to share.. that would be fantastic!

Cheers,
Antony
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Old 30th August 2004, 03:07 AM   #2
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Having spent a lot of time with the Mangers, I say that they can
be considered a full range speaker if you don't push them
too hard, and that pretty much means that a single pole of
crossover filter will do the job at any reasonable frequency.

Electronic crossovers are definitely preferred, but for the Mangers
you can accomplish this with a simple cap and potentiometer
before theamp. Be prepared to fool around with it at length,
and use your years, not the textbook.
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Old 30th August 2004, 03:16 AM   #3
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Here's a picture of Mangers mounted in J-Lows and driven with
Zen Lites. Worked very well.
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File Type: jpg manger1.jpg (72.8 KB, 784 views)
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Old 30th August 2004, 03:18 AM   #4
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And here's a close-up for those who haven't previously seen
what an interesting driver it is.
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File Type: jpg manger2.jpg (47.0 KB, 662 views)
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Old 30th August 2004, 03:58 AM   #5
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Since there's a dearth of Manger data, here's an impedance
curve of a single one of the parallel pair of voice coils, free air.
100 mV = 10 ohms
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File Type: gif manger 3.gif (15.1 KB, 529 views)
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Old 30th August 2004, 04:00 AM   #6
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And here's a near field curve in a large sealed box, 1 KHz
bandwidth.
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File Type: gif manger 4.gif (9.7 KB, 553 views)
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Old 30th August 2004, 04:02 AM   #7
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Lastly, here's a 1 meter curve of the mid and top end. Note the
bar showing the limited low frequency accuracy due to the gating
window (used to filter reflections).

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File Type: gif manger 5.gif (10.0 KB, 536 views)
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Old 30th August 2004, 05:16 AM   #8
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Nelson, what is your impression of the overall sound of the Manger? I bought a pair of Manger drivers on spec thinking I had to try them, and am waiting to implement them in my system. I'd be interested knowing your opinion on using multiple Manger drivers to overcome LF obstacles they pose as a single driver unit.

Cheers.
Tom
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Old 30th August 2004, 05:32 AM   #9
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Quote:
Given the choice do you think using an active crossover is likely to produce a better sound than a Capacitor/Inductor crossover feeding the Manger.

Have you seen the original proposal for an active crossover by Manger ?
If not I may undig it but that could take some time.

Regards

Charles
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Old 31st August 2004, 03:16 AM   #10
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Nelson?
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