APPJ PA1501A 3.5w tube amplifier £90

[Retro101]

Brand New !!
Brilliant little class A amp, with great reviews.
Needs efficient speakers to drive.
On sale at Amazon @ £144.99

https://www.amazon.co.uk/APPJ-PA1501A-amplifier-6AD10-silver/dp/B00X5ECQ4Q/ref=sr_1_2?ie=UTF8&qid=1487934683&sr=8-2&keywords=6ad10&th=1

Specifications:
Tube: 6AD10
Power Output: 3.5W+3.5W @ 8 ohms
Frequency Response: 30-40Khz (+-1db)
Input Sensitivity: 500mV
Signal-to-Noise Ratio: -80dB / 3.5W
Residual Noise < 0.5mV AC
Input AC Voltage: 100-250V AC
Power Consumption: 38W
Input Impedance: 10K ohms
Output Impedance: 8/6/4 ohms (Japan Z11-EI48*24 Output Transformers)
Dimensions: 160mm (w) x 134mm (d) x 125mm (h)
Weight: 2.5kg
Input: RCA Jacks
Output: Banana Jacks
AC: Standard IEC Jack with Fuse protection (2A Fuse)
Does not come with power cord.

You dont get the Iphone either, for size comparison only.
Postage only, paypal fine so all protected.
Postage £10, not light

£90

[M6NTL]

I see both output black terminals are labelled as GND - does this mean that they can be commoned and a single speaker connected between the two red OUT terminals in a bridged configuration to drive a mono speaker???


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[Jazid]

post deleted - I was having a moment there, Firebottle below is correct, though IMHO it would be a strange way to get a 7W output mono amp...Could work ok if you're using a 16 Ohm speaker?

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[Firebottle]

I can see no problem why that wouldn't work, however you would have to invert the signal going into one of the inputs.

Generally when used in bridge mode a two channel amplifier theoretically can give 4 times the output power, but that is wholly dependant on the rating of the power supply. If the supply is only just adequate for normal 2 channel 2x 3.5W then the max is going to be 7W.

My guess is you would probably get a bit more but then run into clipping.

:)

[Lawrence001]

I'd leave well alone!

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[M6NTL]

Thanks for the replies - was just looking at something to run my one remaining good Townshend Glastonbury.
Regarding the input, does one not simply common the left and right together???

Stay Away From the Guard Rails!

[struth]

Only my thoughts but i think you would use + on one amp and - on other as speaker connections and tie the other 2 together. Someone will now say thats rubbish lol. Think i would just get a bigger bridgeable amp

[M6NTL]

Only my thoughts but i think you would use + on one amp and - on other as speaker connections and tie the other 2 together. Someone will now say thats rubbish lol. Think i would just get a bigger bridgeable amp

I think not myself, because you'd be connecting one positive output directly to ground, thereby shorting out the transformer winding?


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