- Feb 2, 2013
- Reaction score
Yes, 93 db measured at one watt at one meter from the speaker cone.
I use a sound meter app on my phone just to get a quantifiable idea of how loud it is in the room. It is in no way scientific or accurate, but it allows me to put a number on what I think is a comfortable playing volume. For me, it is 95db or so in the room. Thats the volume of the 5F1 dimed through its 8" Jensen speaker (96db efficiency).
I think speaker efficiency is a bit of a misleading spec. It's taken at a specific frequency (1KHz) at a prescribed distance (1 M) with a defined level power (equivalent to 1W @ XX VRMS)because they can measure that. But that's a tiny piece of the picture and says nothing about the quality of the speaker, or it's response across the required band of frequencies. A speaker may well be rated lower efficiency at 1Khz but actually have a higher output at other usable frequencies. IMO the response graph that shows the relation of frequency to output is more informative.
That's not even looking at how it's mounted or the cabinet. BTW 3dB increase or decrease in output is just perceptable/noticeable and hardly a major change in volume.
In order for your measured loudness to be comparable you should take it at one meter.
That was a fantastic video. I like that guy a lot. He just seems cool.
And he may have just sold me on a Weber Mass.
He has many awesome videos!
I really like my Weber minimass. To be fair, others hated it. Maybe some amps don't play well with attenuators. Who knows. I think they are cheap enough to try and if they don't work well for you, you can always sell it.
Comparable from one person or environment to another, true. That isn't what I what I was doing though. I simply wanted to set my rig up in my space, find a volume that was comfortable for me and then get some sort of measure of it. Then, when I change speakers or amps, I can objectively say which is louder in my space and application.
As long as you always measure from the same distance and axis you're bang on saying it'll still be a valid comparison in your own environment. I just mean the numbers (dB) mean nothing to us without some point of reference. Is the app an IPhone one and is it free or a marginal cost like the Peterson IStrobe app?
I am a little hesitant to bring this thread back to life, but I promised I would report back after the speaker swap.
To refresh everyone's memory, I was using a Chinese made G12M greenback that was rated at 25 watts and 98 db efficiency. The amp is a Marshall 1974x clone and a 5F1 clone. The MIC greenback sounds really nice and I wasn't changing it because I was dissatisfied with the tone. I just wanted to lower the volume a touch.
I installed a UK made G12M rated at 20 watts and 96db. This speaker is noticeably quieter. It's not a huge difference, but it is noticeable, which was exactly what I was looking for. I don't have to attenuate as much, or at all sometimes, with the Marshall clone, and it sounds glorious!
I was really surprised at how different the two speakers sounded. The UK made speaker sounds... softer.... for lack of a better word, with more midrange than the MIC counterpart.
For those considering the Heritage 10 inch greenback, rated at 95db if I recall, the volume drop should be even more pronounced. Obviously YMMV, but this may work well if you are looking for a great, low volume speaker.