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Select retailers are currently selling the Topping Audio PA5 II amplifier for $199 and the PA5 II Plus amplifier for $259
Well maybe. But you might have other speakers later on...Hi, I'm considering buying this amp for a pair of speakers from an old audio tower. The speakers' specs are 8Ω with maximum input power 70W.
Should I get the regular or the Plus version?
At first I thought about getting the Plus version, but I've seen some specs that mention the only difference in power output being @4Ω (max 85W @8Ω for both models?). That would mean paying the extra $50 for the Plus would be a waste, no?
Hi, thanks for the reply.Well maybe. But you might have other speakers later on...
Regular.Hi, I'm considering buying this amp for a pair of speakers from an old audio tower. The speakers' specs are 8Ω with maximum input power 70W.
Should I get the regular or the Plus version?
Correct.At first I thought about getting the Plus version, but I've seen some specs that mention the only difference in power output being @4Ω (max 85W @8Ω for both models?). That would mean paying the extra $50 for the Plus would be a waste, no?
The link above, and by extension Topping's official specifications, can definitely be trusted.EDIT: Looking thorough this review again and the graph shows max power @8Ω = 53W... (So the link I mentioned above is not to be trusted 100%.)
That's the piece of info I was missing.With 8Ω speakers, the PA5II is voltage-limited, not current-limited, so the extra current capability of the bigger power supply cannot be put to use.
What does "at the knee" mean?Amir specifies output power "at the knee", whereas Topping specify output power at 1% THD (the usual way).
View attachment 388125
It's the point on the THD+N vs Power curve at which the Amp first shows signs of clipping.
The only difference with the Plus is a higher current power supply.
With 8Ω speakers, the PA5II is voltage-limited, not current-limited, so the extra current capability of the bigger power supply cannot be put to use.
@staticV3 is right.Hi, I'm considering buying this amp for a pair of speakers from an old audio tower. The speakers' specs are 8Ω with maximum input power 70W.
Should I get the regular or the Plus version?
At first I thought about getting the Plus version, but I've seen some specs that mention the only difference in power output being @4Ω (max 85W @8Ω for both models?). That would mean paying the extra $50 for the Plus would be a waste, no?
EDIT: Looking thorough this review again and the graph shows max power @8Ω = 53W... (So the link I mentioned above is not to be trusted 100%.)
I would assume the Plus version could go up to ~70W, which seems in line with the price upgrade.? (And a better fit for my speakers.)
Just to answer my own question, the original seller, Shenzhen Audio at Aliexpress, covered it with warranty. They just shipped a new power supply. I'm impressed.Can I order PA5 power supply only? Unfortunately, mine died. I found one from audiophonics but am looking for a US seller at least for now.
How old was your PA5 when the power supply died?Just to answer my own question, the original seller, Shenzhen Audio at Aliexpress, covered it with warranty. They just shipped a new power supply. I'm impressed.
Less than a year old. Like 9 months.How old was your PA5 when the power supply died?
With the PA5II volume turned all the way up, you can only input 2.6Vrms (=10.5dBu) before the Amp clips.Hello. Help needed!
Connecting RME ADI-2 DAC FS to Topping PA5 II+
Which fixed volume in RME, which output level can I select to match Topping input level?
for RCA unbalanced I've set +7dBu
not sure fror XLR
Thanks
Stefano
o dBu = 0,7746V RMS and, by definition, given a value Vx expressed in volts RMS, its correspondence in dBu is:for RCA unbalanced I've set +7dBu