Are these speakers fully compatible?
I've never tested sound levels with my JB3's, and I'm sure I never will, but in a 10'x 10' office they provide all the volume I could ever use, whether I'm listening to Jordi Savall or Tom Petty. I know volume control position doesn't have much to do with anything but with my 10 watt EL84 amp I've never had it beyond 11 o'clock playing any kind of music. I went through several small monitors and the JB3's are the ones that stayed. They're extremely musical, the perfect size for my setup, front ported and they look great. Have you read the 6moons review? |
> Harley52 writes >Drew and anyone that wants to read. 18.4db of sound will take 85-95 watts of power,all things being equal. As fall out from the 1970s amplifier power advertising shenanigans the US FTC requires consumer one and two channel amplifier output power to be rated using sine waves which have a 3dB difference between RMS and peak level. Reproducing the right channel of _Take Five_ takes 18.4dB Peak - 3dB = 15.4dB more power than a sine wave at the same average SPL. With 87dB @ 1W efficiency and 87dB SPL from each speaker you need an amplifier rated for sine waves at 1W * 10 ^ 1.54 = 34.67W which I round to 35W for convenience. Peak power will be 1W * 10 ^ 1.84 or 69.18W. Regardless in such a scenario your peaks are going to be compressed with a 10W amp. You might like the effect but it's not accurate. |
How I look at wattage. Continuous power, not peak. I always considered peak to be bull anyway. The really good amps with great transformers could produce 3db extra on peaks and the lesser amps got 1.5 or so db gain. However, crap amps kept boasting much higher peaks because they didn't care about distortion levels of 10% or more. 1 watt = 87db 2 watts = 90db 4 watts = 93db 8 watts = 96db At about 10db gain you will get a 16 watts = 99db perceived doubling of volume. 32 watts = 102db There you go, 15 db of gain at 32 watts 64 watts = 105db This is getting fairly loud 110 db is THX, 112db is ultra thx |
