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I've never noticed my 303 to be noisy, except for needing an i/p cap to be replaced when it went grumbly. Word has it that the 33 preamp could have been quieter.
Seriously: If you value it, take/fetch it yourself
The 303 does indeed have a sensitivity of 0.5V for full, 45W output and they were, and are still are very good amplifiers.
However, 45watts is not a lot into modern compact speakers which is one reason Quad developed the 100Wpch 405 and its chill'n.
If you do use them to dive passive monitors the best solution IMHO is to put two 10k log pots in a tin close to the PA and having setup the drive from the desk for "normal" levels, set the pots to give the accepted, "calibrated" 85dB SPL at the sweet spot.
Do be aware also that some 303s had voltage limiting resistors in them for use with the ESL.
Dave.
EDIT does anyone sell a made up DIN connector for a 303 i/p that has either a stereo 1/4" jack or a pair of 1/4" mono jacks on its other end?
Seriously: If you value it, take/fetch it yourself
Seriously: If you value it, take/fetch it yourself
I have just found a specc' for the Tannoy Reveal 601P and the Quad is just under the suggested PA requirement of 50W "programme" 100W pk.
Nonetheless the 601P has a sensitivity of 89dB/W/mtr and so 45W should deliver 105dBSPL at 1mtr.
If you were to calibrate for an 83dBish normal level that gives you a ~20dB loudness headroom so unless you are a serious headbanger you should be fine!
Dave.
Seriously: If you value it, take/fetch it yourself
Seriously: If you value it, take/fetch it yourself
Seriously: If you value it, take/fetch it yourself
Seriously: If you value it, take/fetch it yourself
Then I tried the L/R o/p of the Studiomaster Series V 16:8:2 desk into the 303. This is the configuration I would like to use, with the workstation o/p going to a pair of channels on the desk.
The desk drives the 303 much harder than does the workstation. You only need the faders up to the -20dB mark for a VERY LOUD sound out of the Tannoys.
Seriously: If you value it, take/fetch it yourself
So, you need attenuators in each line to the Quad. Now you could just use fixed resistors but might I suggest a pair of Maplin's multi-turn trimmers in a tin?
That way you can set the desk fader to "0" and tweak the Quad to deliver the calibrated 83dBC you know you should be getting!
Dave.
Seriously: If you value it, take/fetch it yourself
Yo! That would be for an extra control. I was thinking now of a set and forget attenuator.
Dave.
Seriously: If you value it, take/fetch it yourself