Int-150 used like power amplifier

[trevi1968]

HI
it's possibly to use the Int-150 like a power amplifier with an external preamps?
There is no a preamp IN connect dedicated
but on remote there is a "pass thru" and "external amp on" buttons...

Thanks
Roberto

 

[Nelson Pass]

Of course. The Int-150 is simply an amplifier with a switch and a volume
control in front.

 

[trevi1968]

HI
thanks Nelson but
if i use the Int-150 like only a power amps where i connect the external preamp?
In which connection on the rear panel?
Roberto

 

[MashBill]

Probably the ones marked "Preamp Inputs".......

 

[h_a]

Probably the ones marked "Preamp Inputs".......

There is no a preamp IN connect dedicated

Weary eyes eh?

Have fun, Hannes

PS: Roberto: if you don't want to fiddle with your amp, connect your preamp to one of the inputs, switch the int to this input, turn volume all the way up.

If you want to get rid of the now useless volume control and switch of your int, you most probably need to do some surgery inside (disconnect volume control internally and bring amp input to backpanel).

 

[jacco vermeulen]

.

 

[trevi1968]

The Preamp IN on the picture are the normal Preamp IN for connect CD, LP, DVD, ecc. but are not the DEDICATED "PREAMP IN" CONNECT like other Integrated!

Probably there may be problem with sensibility, impedence, ecc. between Preamplifier and CD if interconnected there.....

 

[Babowana]

"Preamp Inputs"
sound like inputs to preamp.

And, the speaker terminals
are outputs from the power amp.


Cheers,

 

[jacco vermeulen]

Okidoki, and the next one is...?

 

[Babowana]

Output from the preamp.

Or, broken Americal English. . . ?


Cheers,

 

[jacco vermeulen]

Broken

Or, preamp "Out" is power amp "In", for an integrated amplifier.

(Babo be good boy and get plenty of rest, or i'll come over and hit you with a PR candle)

 

[analog_sa]

It seems the INT 150 uses a DS1802 for volume control No wonder people are keen to use their own preamps.

 

[Nelson Pass]

Have you listened to one (an INT150)

 

[analog_sa]

No, but i've listened to the 1802.

 

[Nelson Pass]

If you used a circuit based on the manufacturer's app notes,
then perhaps that is understandable. Our circuit is not based on
the app notes, and we get very good performance.

I have 11 subjective reviews internationally on the INT150 and
they are uniformly great. Not one complaint about the volume
control or the sound in general.

 

[analog_sa]

I have little doubt the amp sounds great. Could it be even greater with a proper attenuator?

Regarding the DS1802 i probably lack the imagination of using it in sufficiently radical way to make it shine. Tried it both as a potentiometer and as a shunt and it predictably sounded better as a shunt. It certainly beats cheap Alps pots, especially in tracking. Taking into account how compromised are the majority of preamps anyway - opamps, electrolytic or otherwise compromised coupling caps, 3-terminal regulators, etc it may well sound better than most.

 

[CheffDeGaar]

A crumb : http://www.diyaudio.com/forums/showthread.php?postid=1553816#post1553816

 

[analog_sa]

As luck would have it my DS works into a full megaohm - tube amp. And so do the DS chips in ARC preamps of which i have owned a couple with DS1267 and DS1666. The ARCs were so bad that it was difficult to blame the DS.

 

[Nelson Pass]

No doubt it could be better, but frankly we weren't willing to chase
Shalco switches driven by steppers. As it was, we received a lot of
complaints about mechanical noise when we used relays.

Wayne continues to work on it, and progress will be made.