OTOMON Laboratory　(音門ラボ) / PX-4, PX-25 mono block x 2 tube amplifier with X-3.5S transformer

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PX-4, PX-25 mono block x 2 tube amplifier with X-3.5S transformer

We can provide power transformer which use for 117V, 220V, 230V, 240V.
YouTube channel > Otomon Lab YouTube Channel

I will give discount 10% or more for all item in my eBay listing, contact me for more detail

PX-4, PX-25 mono block x 2 tube amplifier with X-3.5S transformer

This product is not for sale, if you want the same item, please contact me for special order making

Manufacturer:: OTOMON Lab

Audio amplifier > Tube amplifiers

Extra RARE tube amplifier using PX-4 and PX-25 tube. output transformer are Hirata Tango X-3.5S. You can change tube from PX-4 to PX-25 just changing switch.

Hirata TANGO X-3.5S is considered as the best OPT for 300B, PX-4, PX-25 tube. This amplifier adopted L63 (6J5)tube in prestage and secondary stage is 71A driven by Tamura interstage transformer A-342, which is one of the most powerful interstage transformer. You can easily change tube to 300B, 6B4G and any other legend tubes, just make some modification.

There are 3 option of NFB, 0db, 3db , 6db

I include prestage 6J5 tube, 71A tube but not PX-25 as well as PX-4 tube.

Specification:

Output : 10W at 600mV input
Noise: 0.2mV (No NFB), 0.1mV at 3db NFB, no noise no hum even with 100db sensitive speaker.
Response frequency: 16Hz ~ 30K Hz
Distortion: 0.4% at 1W 1Khz 15W under 1%

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