A Test. How much Voltage (power) do your speakers need? - Page 51 - diyAudio
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View Poll Results: I measured the test tone at:
2 volts or less 150 37.50%
Between 2-5 volts 137 34.25%
Between 5-10 volts 51 12.75%
Between 10-20 volts 24 6.00%
Over 20 volts. 38 9.50%
Voters: 400. You may not vote on this poll

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Old 8th February 2012, 08:44 PM   #501
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I don't feel I need this test to know my way around speaker sensitivity and power needs, but I thought what the heck, I'll add a data point. Tried it where it would be most convenient at the moment: 93dB 2.83V sensitivity speakers (~96db 1W) and the lowly but loveable 15W HK330c.

I put on some Mozart for good dynamic range, turned it up as loud as I'd ever listen, stopped, hooked up the meter, switched to the test tone and.... immediately blew the fuses in the receiver. Apparently the ~30W into 4Ω isn't going to cut it for me, but then, I knew that already. Edit: hold on, these fuses are only 1A, I don't remember putting those in there. Hmm.

Last edited by dumptruck; 8th February 2012 at 08:48 PM.
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Old 8th February 2012, 08:44 PM   #502
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Quote:
Originally Posted by a.wayne View Post
Are you willing to describe your setup ...? interesting to note ......
commercial DAC with Wolfson chip (less known brand)
DIY am amp with UCD180 modules (delivers 100W unclipped)
Dynaudio Confidence 3 speakers (spec'd at 200W)

the reason I'm generally reluctant to mention the setup is because of the "I knew it!" syndrome (no matter what it is someone will eventually say "those speakers/that amp are/is known to have the problems you're mentioning").
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Old 8th February 2012, 08:51 PM   #503
a.wayne is offline a.wayne  United States
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Not for me, it's your subjectivity, it's what works for you , I ask because there are some in the past who talk the talk , but have no setup , don't even own a cd , yet they scoff at any subjective evaluation.

My intent is to see if you are experiencing dynamic compression, but you have acknowledge playing recordings with limited dynamics, this makes a big difference.
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Old 8th February 2012, 08:59 PM   #504
a.wayne is offline a.wayne  United States
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@Push-Pull,

All the comments i have seen on the 3's suggest a strong beefy amp, i could not find any data on C3 anywhere. i would still suggest 100 watts/ch as an min. even with such an small speaker, not to play louder, not so, even at the same levels the difference in realism will be experienced..

I found my stand mounted mini's worked best when i had them on my BAT VK-500 ,(250/ch) the difference back then was astonishing...
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Old 8th February 2012, 09:20 PM   #505
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we're somewhat off-topic but the objective data suggest that they're an easy load. they're advertised as such but I'm not the one to trust the marketing dept so I measured. impedance does not go below 4.6 ohms and it's equalized. phase shift is +/-30 deg max. the amp should have no problems driving them. and anyway this all too relative, some like it louder, some don't. I met a lot of people who like to listen at incredibly low levels it's not even funny.
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Last edited by mr_push_pull; 8th February 2012 at 09:23 PM.
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Old 8th February 2012, 09:22 PM   #506
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Quote:
Originally Posted by dumptruck View Post
I put on some Mozart for good dynamic range, turned it up as loud as I'd ever listen, stopped, hooked up the meter, switched to the test tone and.... immediately blew the fuses in the receiver. Apparently the ~30W into 4Ω isn't going to cut it for me, but then, I knew that already. Edit: hold on, these fuses are only 1A, I don't remember putting those in there. Hmm.
Someone replaced the 2 amp speaker fuses with ones capable of 3 dB less output .
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Old 8th February 2012, 09:33 PM   #507
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Quote:
Originally Posted by weltersys View Post
Someone replaced the 2 amp speaker fuses with ones capable of 3 dB less output .
although full scale sines are, hm, seldom found in real music I can't see any logical reason to limit at much lower than nominal power.
unless maybe the respective speakers have 1 ohm impedance at that frequency?
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Old 8th February 2012, 09:39 PM   #508
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Quote:
Originally Posted by mr_push_pull View Post
I can't see any logical reason to limit at much lower than nominal power.
Oh, I can give you a logical reason all right: some guy (this one) blows the fuses in his shop receiver one night, can't find the right value around, and rightly decides to put a lower amperage fuse instead of higher one in. Then, he forgets it ever happened.
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Old 8th February 2012, 09:40 PM   #509
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Quote:
Originally Posted by weltersys View Post
Seems odd you have NEVER been near a stage with rock music, or a horn section, or a disco, where peak listening levels are frequently above what a 90 dB speaker with 200 watts can achieve .
Who said that? I meant I never listen to it at that level at home on my hifi system. Bringing up other venues doesn't make sense with regards to the threads topic.
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Old 8th February 2012, 09:54 PM   #510
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Originally Posted by a.wayne View Post
You obviously don't listen to very dynamic music or recordings, 84 din can rise up to 103 db ..
I listen to music such as the classical piece I posted reasonably regularly. I don't however listen to it at a level that's anywhere near capable of hitting ~105dB on peaks. Perhaps at most 100dB, but I'd say more like 95dB. This might be different if I had a larger room, I am in a 4*3 meter room with high ceilings and I sit at around 2 meters away from the loudspeakers. The system is very capable and can easily hit 105dB without difficulty, it remains extremely clean, only the room sounds like it's becoming over loaded and this is especially noticeable with compressed music. My ears don't much like it either and on compressed music this happens with the average replay level at around 85dB. I typically listen to compressed music at around 10dB less then that.
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