SET amp owners thread

Maril555 · Jun 11, 2022

Norway said:
At the moment it’s 160! But it’s supposed to be 100-120 but due to lack of FBs (frequency boards) it’s not possible at the moment.

Could you provide some details about the subs please?
Drivers, who made them, whether they are based on some existing design or a ground up new design, are they passive, and what are some specs- sensitivity, impedance, etc.?
I have the same speakers, but my subs are JL Audio Fathom V2 112.
I’m using active x-over for the mains speakers only- First Watt F3 on the bass and Thomas Mayer 6CB5A SET up top.
Thank you

Norway · Jun 11, 2022

morricab said:
Amare Musica DeForest preamp?

Yes.

Norway · Jun 11, 2022

Maril555 said:
Could you provide some details about the subs please?
Drivers, who made them, whether they are based on some existing design or a ground up new design, are they passive, and what are some specs- sensitivity, impedance, etc.?
I have the same speakers, but my subs are JL Audio Fathom V2 112.
I’m using active x-over for the mains speakers only- First Watt F3 on the bass and Thomas Mayer 6CB5A SET up top.
Thank you

They are based on a Bill Fritzmaurice design THT and made locally by a furniture carpenter here in Norway. The drivers are Dayton Audio RSS390 HF4. It’s app 4 m. long folded horn witch is extended by an additional 1 m.+ when loading into the corners As in the picture.

Norway · Jun 11, 2022

bonzo75 said:
Can you also play without the sub, only Altec?

Yes! I do both. A lot of music don’t need the extended bass and in many cases the overall experience is better just with the 817s !

thomask · Jun 11, 2022

Norway said:
Yes. View attachment 94439

Do you have Accuphase digital eq. under your preamp?

Is it being used?

Norway · Jun 11, 2022

thomask said:
Do you have Accuphase digital eq. under your preamp?

Is it being used?

No! it’s the last all analogue Accuphase crossover F-25 And yes it’s used at the moment.

morricab · Jun 11, 2022

Norway said:
They are based on a Bill Fritzmaurice design THT and made locally by a furniture carpenter here in Norway. The drivers are Dayton Audio RSS390 HF4. It’s app 4 m. long folded horn witch is extended by an additional 1 m.+ when loading into the corners As in the picture. View attachment 94440

Nice!

morricab · Jun 11, 2022

Norway said:
No! it’s the last all analogue Accuphase crossover F-25 And yes it’s used at the moment.

I used to have one of those that I used to blend large electrostatic panels together …a great active xover.

Maril555 · Jun 11, 2022

Norway said:
They are based on a Bill Fritzmaurice design THT and made locally by a furniture carpenter here in Norway. The drivers are Dayton Audio RSS390 HF4. It’s app 4 m. long folded horn witch is extended by an additional 1 m.+ when loading into the corners As in the picture. View attachment 94440

What amplifier do you drive them with?

cal3713 · Jun 11, 2022

Norway said:
Then here is my system with two F4 on my Altec 817, 1505/288. Preamp View attachment 94426 View attachment 94427 View attachment 94428 is the DeForest DHT.

As I've discussed plenty up thread, a DHT pre into First Watt F4 monoblocks has been such a satisfactory combination for me too! Love it.

The Altecs and subs look sublime.

cal3713 · Jun 11, 2022

Norway said:
Then here is my system with two F4 on my Altec 817, 1505/288. Preamp View attachment 94426 View attachment 94427 View attachment 94428 is the DeForest DHT.

How do you have the F4s connected as monoblocks? Are you bridging? Running only one channel?

Norway · Jun 12, 2022

Maril555 said:
What amplifier do you drive them with?

At the moment the new Eigentakt NAD C298.

Norway · Jun 12, 2022

cal3713 said:
How do you have the F4s connected as monoblocks? Are you bridging? Running only one channel?

Via the Accuphase F-25, 500hz FB One chanal for the 817(2x515 16G) and One CH for the 1505/288 16G. Its so quiet/dark bakgrunn compared to anything else I have tried or tested!

thomask · Jun 13, 2022

Norway said:
Via the Accuphase F-25, 500hz FB One chanal for the 817(2x515 16G) and One CH for the 1505/288 16G. Its so quiet/dark bakgrunn compared to anything else I have tried or tested!

Hello

Could you uload of video of the sound from your system?

I also use Pap C1 active crossover designed by Nelson Pass.for bi amping.

But I am also intereted in Accuphase F25 crossover.

I had been using Accuphase DG 28 for 20 years although I stopped using it recently.

thanks

Norway · Jun 14, 2022

thomask said:
Hello

Could you uload of video of the sound from your system?

I also use Pap C1 active crossover designed by Nelson Pass.for bi amping.

But I am also intereted in Accuphase F25 crossover.

I had been using Accuphase DG 28 for 20 years although I stopped using it recently.

thanks

Yes I will look into that! Has had a number of requests for a video/sound recording of the system but not sure how to do this in a quality that makes sense… (not just showing the limitations of my iPhone).
I friend has both the C1 and the F25. Uses the C1 to find the best crossover poind in order to get the right FB. The C1 is very flexible but the F25 is just on a different level in sound quality.

thomask · Jun 14, 2022

Norway said:
Yes I will look into that! Has had a number of requests for a video/sound recording of the system but not sure how to do this in a quality that makes sense… (not just showing the limitations of my iPhone).
I friend has both the C1 and the F25. Uses the C1 to find the best crossover poind in order to get the right FB. The C1 is very flexible but the F25 is just on a different level in sound quality.

This is a recording of Altec A7 biamped using Pap C1 done by Galaxy phone.

Even if you use iphone, it would be helpful.

Norway · Jun 14, 2022

As requested ! The amps could need a little more warm-up… just the main system here, no subs or super-tweeter.

Norway · Jun 14, 2022

thomask said:
This is a recording of Altec A7 biamped using Pap C1 done by Galaxy phone.

Even if you use iphone, it would be helpful.

Ok here you are, iPhone 12 on a tri-pot in my seating position.

Argonaut · Jun 14, 2022

Norway said:
As requested ! The amps could need a little more warm-up… just the main system here, no subs or super-tweeter.

Very Nice Norway… even if your amps were not quite up to frying speed , now if you really want to muck things up pull your Altec’s out into the middle of the room

Norway · Jun 14, 2022

Here is another take with a couple different listening positions and some very diffent music..

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