Cheers!
What would be the 'cleanest' way of converting the Tape Out to a second Main Out on Pass Aleph P, last version?
Thanks and regards!
What would be the 'cleanest' way of converting the Tape Out to a second Main Out on Pass Aleph P, last version?
Thanks and regards!
Isn't the tape loop in this pre-amp a direct connection between the input and the output? I guess I'm not sure what you're looking to accomplish. Do you want to drive 2 amplifiers for bi-amping or something?
Is this a factory unit or DIY?
-David
Is this a factory unit or DIY?
-David
David, thanks for the reply.
That is so. I want to bi-amp and use two outputs by converting the tape loop (which I don't use) into a second main-out.
The tape out is connected to the input and I want to connect it to the output. Quite simple.
The question is not 'what' but 'how', I mean how to do it phisically with the aim of not to mess too much with the unit and to get the best sonic results.
It is a factory unit, last version:
That is so. I want to bi-amp and use two outputs by converting the tape loop (which I don't use) into a second main-out.
The tape out is connected to the input and I want to connect it to the output. Quite simple.
The question is not 'what' but 'how', I mean how to do it phisically with the aim of not to mess too much with the unit and to get the best sonic results.
It is a factory unit, last version:
Attachments
Hi,
without looking at the schematic, I can already remind you that Tape-Out is not affected by volume control and you don't want that right?
Paralleling amps can also be a little complicated if they have small input impedance. Even more complicated if they have different gains.
If you're fearless, you can solder yourself a 1->2 cable - has the nice sideeffect that you don't need to touch your nice Pass-pre.
Have fun, Hannes
without looking at the schematic, I can already remind you that Tape-Out is not affected by volume control and you don't want that right?
Paralleling amps can also be a little complicated if they have small input impedance. Even more complicated if they have different gains.
If you're fearless, you can solder yourself a 1->2 cable - has the nice sideeffect that you don't need to touch your nice Pass-pre.
Have fun, Hannes
Thanks Hannes!
I may be wrong on this, but based on Aleph P circuit tipology and ultra-low output inpedance there should be no problem with low input impedance amplifiers.
For instance, paralleling two amps with 23Kohm input impedance each would result in a final impedance of 11kohm.
Since I don't use the tape out, it's more 'elegant' for me to modify the Aleph P than to use a 1->2 cable. Also I expect to keep the Aleph P for eternity. 😉
I may be wrong on this, but based on Aleph P circuit tipology and ultra-low output inpedance there should be no problem with low input impedance amplifiers.
For instance, paralleling two amps with 23Kohm input impedance each would result in a final impedance of 11kohm.
Since I don't use the tape out, it's more 'elegant' for me to modify the Aleph P than to use a 1->2 cable. Also I expect to keep the Aleph P for eternity. 😉
Hi Sony, I agree with Hannes that a 1-->2 custom cable is the best solution. The only other option is to start cutting PCB traces and soldering jumpers, which is not elegant. The resale value of the unit drops dramatically if it is altered.
There are also potential options like home theatre applications at some point where you might want the tape out someday.
Get 4 cables of the right length and unsolder the preamp end on two of them and join them to the other. Very clean.
-David
There are also potential options like home theatre applications at some point where you might want the tape out someday.
Get 4 cables of the right length and unsolder the preamp end on two of them and join them to the other. Very clean.
-David
David, thanks again.
The tape out is usless because I can always use a 1->2 custom cable to connect the source to both the Aleph P and Tape. 😀
One important advantage: If I use a pair of outputs I gain total flexibity in trying diferent quality interconnects.
Are you sure that to cut PCB traces is the only solution?
The tape out is usless because I can always use a 1->2 custom cable to connect the source to both the Aleph P and Tape. 😀
One important advantage: If I use a pair of outputs I gain total flexibity in trying diferent quality interconnects.
Are you sure that to cut PCB traces is the only solution?
If you don't feel like making such a cable, you can get pre-made adapters such as a Connex Y-adapter from Parts Connexion here:
http://www.partsconnexion.com/catalog/connectors.html
(Just search the page for 55457 - its part number.)
-j
http://www.partsconnexion.com/catalog/connectors.html
(Just search the page for 55457 - its part number.)
-j
To get all of the benefits of bi-amping, you just use the main outputs to drive an active crossover, bypassing the passive crossover.
Something like this:
PRE
|
Active XO ----- Amp 1--- Tweeter or top end bypassing high pass at the lowest XO frequency
|________Amp 2 --- Woofer
Something like this:
PRE
|
Active XO ----- Amp 1--- Tweeter or top end bypassing high pass at the lowest XO frequency
|________Amp 2 --- Woofer
Sony said:
You asked the forum for the "cleanest" way to get a second output for bi-amping. 1-->2 cable is the answer. If you are still determined to hack a beautiful piece of hardware to accomplish this, then go for it.
Bob Ellis is also correct. The main benefit for bi-amping is to eliminate speaker crossovers. An active crossover is needed, and this device will have 2 or 3 outputs per channel for amp connection.
-David
Dear all,
Just wanted to thank all the tips and inform I am convinced. 😎
I will leave the Aleph P untouched and will make an external split.
Active bi-amp is not an option in this setup because I have two power amplifiers for 3-way speakers. Unless I do something like this:
PRE
|
Active XO --- Amp 1--- Tweeter
|
Amp 2 --- Midrange
|____Passive XO --- Woofer
Just wanted to thank all the tips and inform I am convinced. 😎
I will leave the Aleph P untouched and will make an external split.
Active bi-amp is not an option in this setup because I have two power amplifiers for 3-way speakers. Unless I do something like this:
PRE
|
Active XO --- Amp 1--- Tweeter
|
Amp 2 --- Midrange
|____Passive XO --- Woofer
Better leaving the mid-tweeter XO in place and then split it M/T and W.
You may need to put a bit of baffle step compensation in the XO depending on the frequency. Easy to do, see http://www.linkwitzlab.com/index.html for guidance.
You may need to put a bit of baffle step compensation in the XO depending on the frequency. Easy to do, see http://www.linkwitzlab.com/index.html for guidance.
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