Am sure that someone else will, chime in here but that Mac is wasted or even inappropriate with that speaker.Can run on probably (without knowing sensitivity rating) but S.E.T amps or 6 watts to 18 Watts would be a choice (really affordable stuff like Almarro).For solid state T power like Redwine or Pass First Watt would probably sound great (and give better bass control if not harmonics of tubes).Then you could go with a 40-60 watt push pull tube amp etc.I have heard some folks just think that 12 ohm coil speakers don't control bass (Google Zu Tone and you'll get and add for a pair of 12 ohm Tone monitors but that could much smaller bass drivers than you have or what's inherent with 12 ohm).So I think that you don't need that big an amp and could get a better match.The load versus the amp design and bass control well I want to hear others or will call my sound engineer buddy about that.But something from 15 to 60 watts depending on what kind of sound you like is what I think will be best.How'd you end up with these anyway?Check reviews of the Zu's to see matches with other 12 ohm designs.
A well designed tube amp/integrated should be happier than a "pig in slop".
in general, tubes like a higher impedance solid state does not
Perfect for OTL tube amps. Ask Ralph.
Looks like a job for tubes.
Antonkk can you provide a link to Crystalvox. I did a Google on them and nothing.
I think Macrojack is spot on if the impedance specs are correct.
Sorry, folks, I forgot to mention that I didn't buy them yet, just took them for an audition. Here are the speakers: http://crystalvox.ru/production/acoustic/tact.
This sounds like a very easy speaker to drive! The specs indicate that it favors tubes. You do need some power, as the efficiency is upper 80s/lower 90s.
Why does a single spec: 12 ohm nominal impedance indicate that it favors tubes? Isn't the spec some sort of an average across the audio band? It certainly doesn't indicate that the speaker's impedance is a constant 12 ohms. Since the spec doesn't indicate any notion of variance, how can anyone know that tubes would be a good match?
Antonkk, do you read Russian or is there an english translation page?
Bob_reynolds, its pretty easy when you've been doing for a living. If you look at the speaker, it is 12 ohms in the woofers and 8 ohms in the mids and highs. I had to surf their website a bit to figure out what speaker it is and it did not hurt to have someone on staff that knows a little Russian.
Anyway, an impedance curve like that is easy for tubes in general.
Atmasphere, that was my point exactly. One must know the impedance CURVE, not just a single nominal value. You have to know some measure of the speaker's impedance variance to know whether it'll be a good fit for tubes.
Since most of us haven't been doing audio design for a living, it's not pretty easy to make these decisions with inadequate specifications.
Agreed! BTW this points to our discussion on the Doubling Down thread...
Need a high damping factor, McIntosh will not do.
If you have a mismatch, wouldn't it be easy to just install a resistor in parallel across the speaker terminals to lower the impedance that your amplifier is seeing? Or use the optimal amplifier - an OTL.
Conventional tube amplification has a transformer to reduce the native output impedance of amplifier to the 8 ohm standard. OTL means output transformerless. In order to avoid output transformers and the problems they can introduce, some people choose to use an OTL and appropriately high impedance speakers. Since you have the 12 ohm speakers, you should talk with Atmasphere. He makes the amps you need.
It's also possible that these speakers produce woolly bass as an inherent result of their design. A well chosen amp won't necessarily solve this problem. It might, but then again, it might not.
Macrojack, that resistor likely would be in series with the output of a low impedance amp, not in parallel.
Martykl makes a good point too :)
OOPS!!! Looks like I found a way to tell everybody I'm no tech. Thanks for the correction, Ralph.