2. amps-preamps
  3. 125940-84906

SET 45 Amp Driving Dynamic Speakers

I have an Antique Sound Labs Tulip SET amp running Emission Labs mesh plate 45s, driving Audio Note AN E speakers. It will play WAY louder than I want to listen, and the dynamics are amazing with all types of music.

Why do I keep reading that 45s (and other low power triodes) are only appropriate for horns, or other super efficient speakers? I think a real disservice has been done to the audiophile community by the propagation of this idea. IMO, anyone who prefers to listen to music at sane levels can enjoy the many benefits of a low power SET amp with carefully chosen dynamic speakers.

Anyone else feel this way/have similar experience?
tommylion
tommylion OP
874 posts
 
I recently swapped out my old EML mesh plate 45s for a new pair of their mesh 2A3s. I decided to go with 2A3s because that's what the ASL Tulip is really designed for. I was concerned that I would lose that 45 "magic", though.

After breaking in, the 2A3s have the magic, along with more "authority". The increase in power is probably 1 watt, or less, but I do get a sense of more headroom, a little more ease on the peaks.

atmasphere's avatar
atmasphere
12,171 posts
 
If they really were type 45s, your output power is likely tripled. 45s only make about 0.75 watts or so single-ended. A 2A3 can do 3-5 watts.
lewinskih01
912 posts
 
Ralph,

I thought 45s made 2W and one should run them at under 1W draw to keep distortion from growing much.

Is this what you mean by 0.75W?

tommylion OP
874 posts
 
Wow! I thought these EML 2A3 mesh were broken in, but they continue to get better. To me, they Just get out of the way and let the music flow. If you are a fan of the 45 sound, but want a little more power, I'd definitely look into these. They are not cheap, and you may have to wait for a dealer to get them in, but they are totally worth it.

atmasphere's avatar
atmasphere
12,171 posts
 
I thought 45s made 2W and one should run them at under 1W draw to keep distortion from growing much.

Is this what you mean by 0.75W?
You can get 2 watts out of them but if you really want to hear what they do its a good idea to run them at a lower voltage (where they will also last longer); in most applications in the old days they were run pretty conservatively. I used to have an old radio that used one and I think it was only good for 0.8 watts or so. But after 70 years in the field it still tested good...
More to discover