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Post by meterman on Oct 23, 2010 10:20:36 GMT -5
Anyone know the damping factor of the UPA2?
I just recently purchased a pair of Zu Audio Soul Superfly speakers. They are 16 ohm impedance and really don't need much damping. Any thoughts will be greatly appreciated!
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Deleted
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Post by Deleted on Oct 23, 2010 19:39:09 GMT -5
The subject of Damping Factor rears it ugly head ( ;D) from time to time.
I say that with some humor because it pops up about every 3-6 months and there is a lot of variance in how different manufacturers measure DF. Many experts believe that anything over 50 is fine. There are a small number of manufacturers that try to use the damping factor specification as pointing to the superiority of their amp. Most seem to disagree with the extremely high DF figures.
Emotiva's DF should be far in excess of what your speakers need. Emotiva is right among some fine companies with their Damping Factor. I'm not sure what the exact DF for the UPA-2 is or if they even currently publish the DF for any of their amps. I'm sure a quick call to Emo would get an answer. I presume it would be in the 100-200 area. Previously they listed the DF for the XPA-2 at 200. ;D
Emotiva XPA-2 ... DF - 200
Krell 600 ($15,000) ... DF - 270
Musical Fidelity Titan ($30,000) ... DF - 250
Pass Labs XA 30.5 ($5500) ... DF - 150
McIntosh MC501 ($4100) ... DF - 100
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NorthStar
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Post by NorthStar on Oct 24, 2010 0:44:07 GMT -5
Dumping Factor? What's that?  ...Stopping on a dime while running to the bathroom?  |
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Post by ny1pr2009 on Oct 24, 2010 9:12:52 GMT -5
My Kavent P-2200 Monoblocks, • Damping Factor, 20 HZ – 20 kHz: 300 First 100 watts in pure class A @ 8 ohms and almost 200 watts in pure Class A @ 4 ohms   |
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Deleted
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Post by Deleted on Oct 24, 2010 9:15:39 GMT -5
Carlos:
what speakers are you running ?
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Post by ny1pr2009 on Oct 24, 2010 9:18:06 GMT -5
Those are the Dali Helicon 800 MK2 Here is a better picture of both speakers.  HELICON 800 MK2 SpecificationsFrequency range (+/- 3dB) [Hz]: 31 - 27,000 Sensitivity (2,83 V/1 m) [dB]: 89.5 Nominal impedance [ohms]: 4 Maximum SPL [dB]: 113 Recommended amplifier power [W]: 50 - 400 Crossover frequencies [Hz]: 580/3.000/13.000 Hybrid tweeter module, Super high frequency driver: 1 x 10 x 55 mm Ribbon Hybrid tweeter module, High frequency driver: 1 x 25 mm Soft textile dome Midrange frequency driver: 1 x 6½ " Wood fibre cone Low frequency driver: 2 x 8 " Wood fibre cone Enclosure type: Bass reflex Bass reflex tuning frequency [Hz]: 28.5 Connection input(s): Bi-amping (active crossover) Recommended placement: Floor Recommended distance from wall: 0.00 Loudspeaker type: Front Magnetic shielding: No Max loudspeaker dimensions incl. base and grille (HxWxD) [inch]: 44.5 X 12.0 X 21.5 Loudspeaker weight [lbs]: 90.2 Accessories included: Manual Spikes M10 Connectors |
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RadTech
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Post by RadTech on Oct 24, 2010 9:46:56 GMT -5
Those are the Dali Helicon 800 MK2 Here is a better picture of both speakers. HELICON 800 MK2 SpecificationsFrequency range (+/- 3dB) [Hz]: 31 - 27,000 Sensitivity (2,83 V/1 m) [dB]: 89.5 Nominal impedance [ohms]: 4 Maximum SPL [dB]: 113 Recommended amplifier power [W]: 50 - 400 Crossover frequencies [Hz]: 580/3.000/13.000 Hybrid tweeter module, Super high frequency driver: 1 x 10 x 55 mm Ribbon Hybrid tweeter module, High frequency driver: 1 x 25 mm Soft textile dome Midrange frequency driver: 1 x 6½ " Wood fibre cone Low frequency driver: 2 x 8 " Wood fibre cone Enclosure type: Bass reflex Bass reflex tuning frequency [Hz]: 28.5 Connection input(s): Bi-amping (active crossover) Recommended placement: Floor Recommended distance from wall: 0.00 Loudspeaker type: Front Magnetic shielding: No Max loudspeaker dimensions incl. base and grille (HxWxD) [inch]: 44.5 X 12.0 X 21.5 Loudspeaker weight [lbs]: 90.2 Accessories included: Manual Spikes M10 Connectors Just a great looking setup! ;D |
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geebo
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Post by geebo on Oct 24, 2010 13:10:48 GMT -5
Dumping Factor? What's that? ...Stopping on a dime while running to the bathroom? No No No, Its Damping Factor, not Dumping Factor. I always get the two confused as well. Damping Factor is one of the specifications for Depends and the like. It is defined as follows: (Fluid Capacity / Absorption rate) x 100 Where fluid capacity = total amount of fluid that can be contained without any loss. Measured in litres. Absorption rate = time to fully absorb .5 litres without any loss in seconds. Example A: .6 litre capacity .5 second absorption rate .6/.5 = 1.2 x 100 = 120 damping factor. Example B: .8 litre capacity .4 second absorption rate .8/.4 = 2 x 100 = 200 damping factor someone feel free to step in and correct me if I got it wrong.  |
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Deleted
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Post by Deleted on Oct 24, 2010 13:19:26 GMT -5
By George, I think he's got it!
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Lonnie
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Post by Lonnie on Oct 24, 2010 14:38:25 GMT -5
;D Dumping Factor? What's that? ...Stopping on a dime while running to the bathroom? No No No, Its Damping Factor, not Dumping Factor. I always get the two confused as well. Damping Factor is one of the specifications for Depends and the like. It is defined as follows: (Fluid Capacity / Absorption rate) x 100 Where fluid capacity = total amount of fluid that can be contained without any loss. Measured in litres. Absorption rate = time to fully absorb .5 litres without any loss in seconds. Example A: .6 litre capacity .5 second absorption rate .6/.5 = 1.2 x 100 = 120 damping factor. Example B: .8 litre capacity .4 second absorption rate .8/.4 = 2 x 100 = 200 damping factor someone feel free to step in and correct me if I got it wrong. Well my fluid dynamics are a little rusty, but I think you got! ;D |
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Post by briank on Oct 24, 2010 18:34:58 GMT -5
I think the OP was inquiring about the damping factor as Zu Audio advises the Soul speaker does not match well with amps that have a high damping factor. I've discussed this with them as well and we talked about putting the 12 ohm driver in the Soul speaker in lieu of the 16 ohm as they felt this would probably work better with most Solid State. Meterman, what amp are you using now with the Super Fly? How do you like your new speakers?
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geebo
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Post by geebo on Oct 24, 2010 18:52:13 GMT -5
Oh...
Well then, in the words of the late great Emily Litella:
"Never mind"
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NorthStar
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Post by NorthStar on Oct 24, 2010 19:47:20 GMT -5
^ ;D ________________________________ * Carlos, did you mention before that you were going to change (replace your speakers) with some Def Tech ones? I might be wrong here as your actual speakers, I believe, are top-notch performers. I'd rather be wrong too!  Best regards, Bob EDIT: Nope, you are simply adding another pair of Def Tech BPVX Bipolar surround speakers for a full 7.1-channel system setup, and replacing your Selah Audio Reference Center speaker for the Def Tech CLR-3000 one. Also Carlos, those two Front Height Surround speakers, what are they (brand & model)? And are they indeed for the Front Height speakers? Additionally, did you have time yet to set up your Onkyo PR-SC5508P Surround Processor with Audyssey MultEQ XT32? * I've never said that before to you; but your couch right against the back wall goes against the best acoustics in your room. And as much as I love Audyssey (and I truly belive that it should do some real positif benefits in your own room), it would be real tough to use the full 8 mic measurement positions in your room (even more so with the 32 available ones from Audyssey MultEQ Pro software). Of course, I don't know of anyone that took those full 32 mic positions in their setup (14 is the maximum that I'm aware of so far). You have some beautiful audio/video gear and speakers of the first order; I believe you deserve the appropriate room for them. ...And with a large screen plus top-notch projector. Lol, who am I to tell you how to spend your money?!! BUT, I do realise that in life, some of us, we can have some of the very best, but without the full complement, if you know what I mean... Carlos, you are probably aware of the Audyssey Setup Guide, but here it is again (just in case): @ www.avsforum.com/avs-vb/showpost.php?p=14456895&postcount=5701*** I also know that you previously mentioned the Denon AVR-4311CI receiver with 11.2-channel (your 5508 is a 9.2-channel pre/pro), and you had consider it for a moment. I am closely following reviews by owners with this receiver (used as a pre/pro) and also from the AVR-A100 (his brother in better looking clothing), as for me Audyssey MultEQ XT32 plus the Audyssey MultEQ Pro version 3.4 software upgrade (coming soon for this receiver) is today the pinnacle of Auto Calibration EQ system and the latest technological advances in Surround Sound. And your 5508 is also of great interest to me personally... AUDIO is a big part of my life and will always be. ...Music, Movie Soundtracks, Sound of Nature, Sound of a Woman under the spell of Love, and all that Bluesyyy Jazzz... ;D |
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Lonnie
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Post by Lonnie on Oct 24, 2010 19:55:50 GMT -5
Anyone know the damping factor of the UPA2? I just recently purchased a pair of Zu Audio Soul Superfly speakers. They are 16 ohm impedance and really don't need much damping. Any thoughts will be greatly appreciated! Well if you want to lower the Damping factor and have more of a tube type sound then just add a 0.5 ohm, 25 watt resistor in line with each speaker. :) |
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Post by briank on Oct 25, 2010 6:10:00 GMT -5
Hmm, thats pretty interesting Lonnie. I believe the old car headlight switches were adjustable resistors. Just need to creates something like that and then we can dial in our preferrred level of tubeyness??? ;D ;D |
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...Stopping on a dime while running to the bathroom? 
