BZLS and SKA GB150D

[hcbonfim]

Hi dear, i am in doubt.. I made a Aleph 5 and now i am bulding an Aleph 3 with better parts (i am buying the parts) and a BZLS (almost done) but the SKA i think is a very good amp (nice comments) . The SKA will match with BZLS ? I will have the wonderful sound of Alephs in SKA ?

best regards

Hudnes

[KLe]

Originally posted by hcbonfim
Hi dear, i am in doubt.. I made a Aleph 5 and now i am bulding an Aleph 3 with better parts (i am buying the parts) and a BZLS (almost done) but the SKA i think is a very good amp (nice comments) . The SKA will match with BZLS ? I will have the wonderful sound of Alephs in SKA ?

best regards
Hudnes

Hi hcbonfim
I am not sure what you are asking.

Is this your planned project (SKA/BZLS ) or are you asking a question?

Sorry
KL

[AndrewT]

Hi,
BZLS, what is that?

Which SKA? the power amplifier, or the buffer, or the bass summer/filter?

[Babowana]

I believe BZLS = Balanced Zen Line Stage of www.passdiy.com/legacy.htm

[AndrewT]

Hi,
the SKA power amp is intended as an unbalanced input (non-inverting) and would not particularly suit a balanced input.

But, just as any opamp can be converted to balanced (with a lowish input impedance due to NFB loop), the topologies used by Pass can be applied with the SKA power amp as well.

However, maybe the new buffer that AmpGuru is developing could be used as a balanced to unbalanced stage before entering the SKA power amp.

The mix of Single Ended and Push Pull could well be complimentary. I wonder?

[hcbonfim]

Let me explain, i want to use the balanced line stage as a pre-amp using unbalanced outputs to source simple killer amp , pre and power. Its more clear now i guess. Thanks for the answers,
best regards,

[AndrewT]

Hi Hc,
is there a question?

[KLe]

Originally posted by hcbonfim
Let me explain, i want to use the balanced line stage as a pre-amp using unbalanced outputs to source simple killer amp , pre and power. Its more clear now i guess. Thanks for the answers,
best regards,

Hi hcbonfim
No worries, yes, that can be a good approach/compromise

That is using the Hot/Gnd from the BZLS's balanced Pre out to the Signal/Gnd of SKA.

Because the SKA is so quite, this shouldn't be an issue and because balanced output usually have low impedance output, <100 ohms, this would also provide high compatibility with the SKA

Just to let know, Greg now has mono pre-amp boards that have a 47 ohm output impedance
These are the SKpre specs http://www.diyhifi.org/amplifierguru/guru_008.htm

Frequency response DC - 3MHz -3dB
Audio band 20 - 20KHz -0.1dB
Distortion < 0.001% 2HD only
Input Impedance 10Kohm
Output Impedance 47 ohm (user defined)
Noise < -120dBA below 2Vrms out
Rated output 2Vrms
Maximum output 10V rms
Output current 10mA in Class A
Supply current 7.5mA
Supply voltage 30Vac CT or 15Vac or +/-20V
Dimensions 75mmD x 50mmW x 30mmH


hope this is helpful
thanks
KL

[KLe]

Hi hcbonfim
I forgot to mention that the SKpre can also be wired as balanced in and unbalanced out

thanks
KL

[hcbonfim]

Thanks Kle, i will check skpre,

best regards