Humming sound.
This can come from the amplifier, from the tubes, or from other sources. You
may use the A08-S only with the inputs connected to a pre-amp, and the pre-amp must be switched on.
Otherwise hum may appear. If hum still appears, in some cases hum is caused by so called ground
loops. These are very hard to identify, and you may have no clue where it comes from, and accuse the
wrong parts of the equipment. A simple way to find this out with the A08-S, is to remove the 717A
tubes while the amplifier is OFF. Then switch on without the 717A. If the hum is gone now, you
have a ground loop very likely, and the hum is not caused by the amplifier. The best solution is, use
Lundahl LL6810-PHMPHM interconnect cables, and the problem is gone. LL6810-PHMPHM has
two male RCA connectors, but versions from XLR to RCA exist also.
Recommended speakers
Yamamoto YS-500, Yamamoto YS-604.
Sensitivity needed 98dB or more.
Notes for Avantgarde Speakers:
Though several of these can be 16 Ohms, these will work
very good on the 8 Ohms Version A08-S. If there is any hum issue, read the above section
about ground loops, you may need the Lundahl interconnect cable, from the pre-amp to the
A08-S.
Specifications:
Output Power: 2x 2Watt
Frequency characteristic: 18-30kHz (at 1Watt)
Input impedance: 200k ohms
External Dimensions: : 400(W) x 294(D) x 204(H)
Weight: 14.3 kg
Telefunken RGN1064 Mesh rectifier in A08-S. This is the tweak #1 from JACMUSIC
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