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First Watt J2

I'm looking for an amplifier to drive my 8 ohm 94 dB DIY back-loaded horn single 6.5" driver speakers. Looking at the specs for the J2, it looks like it would be a good option as it appears to behave much like an OTL or a current source device. The F2 is another option but its voltage source behavior may be less suitable for these speakers. Am I looking the right way at the differences between these two amplifier designs and their suitability for this type of speaker design? I'm thinking of pairing my Aric Audio Unlimited tube preamp - 600 ohm output impedance, with the J2.
Thanks.
128x128kalali
kosst_amojan
2,095 posts
 
The J2 is a pure single ended amplifier and that's the reason it halves it's power into half the impedance. It's most definitely a voltage source amplifier. If you're looking for a pure current source amp you want an F4. 0dB of voltage gain so you need a pre-amp or some flea amps that can make the voltage you need. 
kalali's avatar
kalali OP
1,645 posts
 
Thanks for all the input. My current (integrated) amp for these speakers is a Sophia Electric Baby 10wpc push/pull version and they sound decent, especially vocals at lower volumes. Looking for something to upgrade and add more "body" in the mid/upper mid bass range. Definitely open to tubes as well. This is a second system so trying to keep the budget around $2K used.
azazello
34 posts
 
You can use fullrange, bass and tweeter speakers. Fullrange 8 inch /no less/ for 50-14000 Hz /connected direct to amp, without crossover, that press the sound, that is most iportant/ for voices, simph. music, jazz...Bass 12 inch speaker for 30-35 Hz. And 2-3 inch speaker for 14-20 kHz. If You interest, I can explain about connection. I listen the same configuration and Im happy.
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