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The LIO tube stage uses a pair of tubes - one tube per channel.
How closely matched should the tubes be?
Plus any of your volume control options also have balance control right? Which could compensate for tube differences...
Hi Brent,Correct - and both sections of each tube (6922 dual triode) are used in this circuit.As close as you want them to be. Seriously, it won't hurt anything if they are not closelymatched, but you could end up with audible channel imbalance.For the stock tubes, I test them in the circuit and make sure output voltages of each channel do not vary morethan 0.5dB. For example, if the output of one channel is 1V, the output of the other should be > 0.94V and < 1.06V. - Vinnie
brh,What other tubes have you tried in your signature 16 so far?I can't wait to read your impressions of the LIO since you have a S16 right now and will be able to compare the two
So what goes in LIO when she (she's a she, right? she's name after three ladies after all…) arrives?
I recommend a pair of Amperex 8416 PQ (it's like their 7308, but with a 12V heater). This is the tube Vinnie recommended for my Signature 57 and its excellent.
Hi Vinnie,I am enjoying reading the comments from everyone regarding their experiences with tube rolling in their LIO tube stage and LFP-V Edition equipment. I have a newbee question. I have a Signature 15 LFP-V Edition amplifier that I got from you last fall. It is not the integrated version. This still has a tube stage? I thought that the tube stage was located in the preamplifier section of the integrated versions. Since this is a "tube" question, I didn't know where else to post it. Thanks.Blu99Zoomer
Hi radarnyc,LIO Tubestage follows the volume control, so it is used for both headphone and speaker outputs, as well asthe variable line outputs ("preamp outs").Vinnie
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