Hello,
I would like to ask you for advice to select the appropriate amplifier Pass for listening classical music. Now I have Electrocompaniet ECI 2, which is very good.
I'm thinking about amplifiers from Pass Labs Aleph 5, Aleph 3 ...
I listen to mostly classical orchestral music from LPs (large orchestras, symphonies, concerts, ...).
Speakers I have 2.5 band with 65 liter bass reflex, made according the project to Zaph|Audio - ZRT - Revelator Tower. Sensitivity have approx. 90 db impedance is 4 ohms (may also fall slightly below 4 ohms).
I have upgraded turntable Lenco L75 + arm Jelco SA-750D + Shelter 90X cartridge.
Which amplifier will be right for me, Aleph 5, Aleph 3, or which else? Where can I find the most complete project for its construction?
Thank you for your opinions. Milan
I would like to ask you for advice to select the appropriate amplifier Pass for listening classical music. Now I have Electrocompaniet ECI 2, which is very good.
I'm thinking about amplifiers from Pass Labs Aleph 5, Aleph 3 ...
I listen to mostly classical orchestral music from LPs (large orchestras, symphonies, concerts, ...).
Speakers I have 2.5 band with 65 liter bass reflex, made according the project to Zaph|Audio - ZRT - Revelator Tower. Sensitivity have approx. 90 db impedance is 4 ohms (may also fall slightly below 4 ohms).
I have upgraded turntable Lenco L75 + arm Jelco SA-750D + Shelter 90X cartridge.
Which amplifier will be right for me, Aleph 5, Aleph 3, or which else? Where can I find the most complete project for its construction?
Thank you for your opinions. Milan
Hi,
Your amplifier is 2 ohm capable (2x150W and 2x90W 4 ohms)
and you would need a massive proper class A amplifier to get
anywhere near its capabilities. As it is it matches pretty well.
Its clearly not Class A beyond a certain point, but that is no
bad thing, its better than just clipping due to low output.
All proper class A designs basically usually can only manage
about half the power into 4 ohms than they can into 8 ohms,
unless specifically built for 4 ohms, and for 4 ohms they
should be designed for maximum output into 3R*.
Also note a higher than normal amplifier output impedance
in this case won't interact much with the broad very flat
impedance of the ZRT2.5, but will interact with bass tuning.
rgds, sreten.
* A compromise for class A, for Class aB you really should
build a 4 ohm amplifier to be able to handle 2R loads well.
I suspect the ECI 2 specs are into R, not nominal ohms.
Your amplifier is 2 ohm capable (2x150W and 2x90W 4 ohms)
and you would need a massive proper class A amplifier to get
anywhere near its capabilities. As it is it matches pretty well.
Its clearly not Class A beyond a certain point, but that is no
bad thing, its better than just clipping due to low output.
All proper class A designs basically usually can only manage
about half the power into 4 ohms than they can into 8 ohms,
unless specifically built for 4 ohms, and for 4 ohms they
should be designed for maximum output into 3R*.
Also note a higher than normal amplifier output impedance
in this case won't interact much with the broad very flat
impedance of the ZRT2.5, but will interact with bass tuning.
rgds, sreten.
* A compromise for class A, for Class aB you really should
build a 4 ohm amplifier to be able to handle 2R loads well.
I suspect the ECI 2 specs are into R, not nominal ohms.
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Is sufficient a smaller amplifier Power Output approx. 60 watts / ch 4 ohms, I have a smaller room, ECI 2 is not working to full power.
ZM, don't you mean build them all, listen, decide? 
ZRT 2.5 way doesn't look like it dips much below 4 ohms. I would consider an F-4 driven by a pumpkin or BA3 front end or an F5T with at least two pairs of output devices. An Aleph J with doubled up output devices should work as well.
ZRT 2.5 way doesn't look like it dips much below 4 ohms. I would consider an F-4 driven by a pumpkin or BA3 front end or an F5T with at least two pairs of output devices. An Aleph J with doubled up output devices should work as well.
ZM, don't you mean build them all, listen, decide?
ZRT 2.5 way doesn't look like it dips much below 4 ohms. I would consider an F-4 driven by a pumpkin or BA3 front end or an F5T with at least two pairs of output devices. An Aleph J with doubled up output devices should work as well.
Aleph J, F5Tv2 based on sound preferences. Or BA-3/Pumpie +F4, can't comment here.
I've tried the Aleph 4 and the F5, the Aleph has a far more subtle sound which to me is more pleasing to the ear. However, the Aleph 4 is a far more challenging build. The Aleph 4 is a monster at 100W Class A, it needs huge heatsinks and a huge PSU. ISTR it dumps about 400W of heat into the heatsinks.
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We listen to a fair amount of Classical. I am going with a Pumpkin + F-4 (maybe a pair of mono, balanced F-4s down the road).
Also, I recommend the Ernest Ansermet Nutcracker on vinyl, Speakers Corner (Decca) pressing!
Also, I recommend the Ernest Ansermet Nutcracker on vinyl, Speakers Corner (Decca) pressing!
Thank you for your opinions. I Interested also Aleph-X.
By http://www.sounds.wa.com/reference/guide_draft.pdf :
Single-ended output stages perform similar to the atmosphere where we listen to music, and so appear to me to be a more appropriate series Aleph. They are also easier to build.
By http://www.sounds.wa.com/reference/guide_draft.pdf :
Single-ended output stages perform similar to the atmosphere where we listen to music, and so appear to me to be a more appropriate series Aleph. They are also easier to build.
I decided to build Aleph 5 + passive preamp. Output level of my phono preamp and CD is > 850 mV and so the passive preamp should be with the Aleph 5 (gain 26dB) into 4 ohms OK.
I need to get information / project for its build.
I need to get information / project for its build.
PKI, thank you for the recommendation, but Aleph 5 has 26 db gain and Aleph 60 only 20 db and it's of little for use passive preamp.
Aleph 60 has better sound quality than Aleph 5 (for listening to classical music) and what is the main difference between them ?
Aleph 60 has better sound quality than Aleph 5 (for listening to classical music) and what is the main difference between them ?
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