Introducing Seductor, our latest amp!

[WK3K]

Very good. Thank you Gentlemen!

 

[tjessen]

Now how about S.E.X vs. Smash/Seductor vs. Stereomour for the Blumenstein Orcas? Just curious.

 

[Paul Birkeland]

Now how about S.E.X vs. Smash/Seductor vs. Stereomour for the Blumenstein Orcas? Just curious.

Stereomour will sound the best.
SEX will do the job, and drive headphones.
Seductor will be in between, offering more power than the SEX, but not the level of fidelity of the Stereomour.  It will also require a line stage or other manner of volume control in front of it.

 

[tjessen]

Stereomour will sound the best.
SEX will do the job, and drive headphones.
Seductor will be in between, offering more power than the SEX, but not the level of fidelity of the Stereomour.  It will also require a line stage or other manner of volume control in front of it.

Thanks for clarifying that, I was just curious to see if the Smash/Seductor would be of greater resolution than the Stereomour despite the cost difference, however I suppose that is the advantage of the Stereomour being integrated.

 

[Paul Birkeland]

Thanks for clarifying that, I was just curious to see if the Smash/Seductor would be of greater resolution than the Stereomour despite the cost difference, however I suppose that is the advantage of the Stereomour being integrated.

The advantage to Seductor/Smash is modularity and upgrade potential.  The Smash will (shortly) have a C4S/shunt regulator upgrade, as well as taking the BeeQuiet.  The Seductor is also incredibly versatile in terms of tube rolling, we will have more on that shortly!

-PB

 

[Doc B]

Thanks to everyone who took advantage of the pre-release pricing of the first ten kits!

 

[fullheadofnothing]

I just edited the first post of this thread to include a picture of the underside of a completed Seductor.

 

[Natural Sound]

I just edited the first post of this thread to include a picture of the underside of a completed Seductor.

Thanks for the update, Josh. That's a real nice clean layout. Something we've come to expect from Bottlehead. Keep up the great work.

 

[KevO]

Looks nice. Great price!

Can you tell me the output impedance of Seductor and Paramount?

Thanks,
Kevin

 

[Doc B]

I will let PJ weigh in on the actual output impedance of each amp. Seductor can be wired for 2,4,8 and 16 ohm loudspeakers. Strapped as a mono amp the taps would be 4,8,16 and 32 ohms. Paramount can be wired for 4,8 and 16 ohm loudspeakers.

 

[Paul Joppa]

We have not made careful measurements of output impedance for any of our amps, but I can give calculated estimates based on transformer wire resistances and published tube curves:

Paramount should be about 2.75 ohms on the 8-ohm tap (damping factor 2.75).

Seductor should be about 1.75 ohms on the 8-ohm tap (damping factor 4.6).

 

[aragorn723]

91dB is pretty high, but the manufacturer hasn't included an impedance curve, so it's hard to know if the 8 Ohm impedance has any low dips that might be of concern.

-PB

Is there an easy way to measure an impedance curve on the speaker?  The only thing I could find out online from def tech is that they have a "friendly" impedance curve, lol.

Dave

 

[Grainger49]

Dave,

No, impedance is a complex number.  It contains a resistive and reactive component at every frequency.  You need the X and Y axis and periodic frequency marks on the curve.

Look here, the second graph tells the whole story:

http://bottlehead.com/smf/index.php?topic=3873.msg35184#msg35184

 

[aragorn723]

Grainger,

Sounds like the easy answer is to keep the large solid state amp and call it a day  8)  That was pretty interesting though, never seen the 2nd type of impedance graph before.  How could someone realistically approach a problem like that?  (Short of picking speakers that are known to be tube-friendly).  I have heard some incredible instrument tone come out of tube amps that just doesn't seem to be produced by solid state, hence the curiosity..  Not to ramble on too much, but a lot of speakers
designed for tubes (i.e. orcas) don't have a tweeter on them?  Do they reproduce treble with that crystal clear sound speakers with tweeters have, or is this catering to another type of audience?

Dave

 

[Paul Joppa]

There is software available, probably even shareware, that can be used with a computer sound card and an ordinary audio amplifier to measure the impedance curve. More difficult though is to interpret that curve well enough to predict what your ears will say!

 

[Grainger49]

There are whole speaker lines known for their ease to drive with an SET amp. 

I would ask here.  If you are interested in Seductor, ask in the Seductor folder.  Even though there are few out there the power range is well known.

 

[4krow]

Choices are a good thing!