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nice set amps can be made w/6c33c tubes. and 6c33c tubes are not expensive. but some of these really are not low power amps. i have a pair of audio mirror 6c33c amps that are relative bargains, imo, but at ~40-45wpc, they don't technically qualify for this circle. that's what having a pair of 6c33c's per channel will do. audio mirror makes another amp, similar topology, w/6as7 tubes; for 20wpc:doug s.
I wonder If you could run your AudioMirror 6C33 in summer version, with only one 6C33?? (by unplugging one tube supply) to listen a SET amp.
If money is not a issue and want something better than a Lowther without it`s weakness.Rethm Trishna, a 6,5 inch wideband and dual woofers. 2w is enough because the woofers are handle by its own amplifier.http://www.rethm.com/trishna_details.htmlFeastrex 5 inch fullrange driven by the Feastrex 10w amplifier. Impressive!http://www.miketangaudio.ca/Feastrex_Product_Information.pdfI haven`t heart it, but a owner of Festrex said the fielcoil version, it is something.
... GPA 604-8H-III in a Scott Lindgren designed MLTL
Driver Qts is another factor that has been discussed in detail by the likes of Nelson Pass and others, yet still seems to be ignored by most folks. Qts is a measure of the driver’s ability to damp itself – to control / stop itself. The lower the Qts the greater the driver self-control. Speaker system Qtc refers to how well the speaker system – cabinet and driver combination – is damped, which relates mostly to bass performance (lean, dry, just-right, soft). The lower the value the more damped the system. A zero feedback SET amp has high output impedance and offers little control over a driver / speaker system; an ideal speaker system should not need much control from the amplifier. If you have an efficient speaker that sounds slow, soft… boring, it may use a mid-high Qts driver and/or be not well enough damped.
What's amazing about this discussion is the original question asked about speakers and about 80% of the posts are about amps. Yes, low watt amps are great, but what are those speakers that have the right sensitivity, right impedance curves, etc. that are able to make wonderful music with low watt amps (let's say below 12 watts)?(Yes, I will see if there are more up-to-date discussions, or post a new question.)
Unlike a solid state amp, I believe tube amps will put out more power at higher impedance loads. If there is a big bump, it will result in an uneven frequency response.
Yes, low watt amps are great, but what are those speakers that have the right sensitivity, right impedance curves, etc. that are able to make wonderful music with low watt amps (let's say below 12 watts)?
Duke,What is the effect from the inductance on a low watt tube amp?The driver is a 12'' 98dB 1mH wide range.Thanks
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