Review and Measurements of Monoprice Hybrid Tube Amp

[elseven77]

Hello, I have both versions of this amplifier Taga Harmony HTA-25B V(2021) And the older brother, HTA-25. Unfortunately, none of the ones presented on the test resemble the original? Good versions on europe plus lamps this HTA-25B HTA-25B V(2021) HTA-25B version 2021 is a high-performance and at the same time economical hybrid amplifier with a power of 2 x 25W / 4 Ohm, which uses four high-quality tubes (depending on the option: 2 x 6P1 and 2 x 6N1, or 2 x 6H1N and 2 x 6N1N -EB) in the preamplifier section and transistors at the output. it's similar with HTA-25B

the sea, I guess I'm wrong, but something's wrong?

I greet you with great respect

 

[solderdude]

HTA-25B version 2021 is a high-performance and at the same time economical hybrid amplifier

We can't know before it is tested independently.
Most likely it is not really 'high-performance' but am sure the manufacturer and salesman will gladly use those words.
I'm sure they sound just fine.

 

[elseven77]

It would be very nice to see your test of this amplifier... on measuring devices I will also add that HTA-25B version v2021 with A perfectly MATCHED PAIR of Woshod 6N1P-EW lamps (2 lamps) - SELECTED and A perfectly MATCHED PAIR of Swetlana 6P1P-EW lamps (2 lamps) - SELECTED and after replacing the operational amplifier with Muses8820 and the sound of this amplifier is indescribable. but in the store version there will probably be a big difference a surprise at such a low price,

 

[SIY]

the sound of this amplifier is indescribable

I'll bet.

Not that it makes a difference, but... how are the tubes "perfectly" matched?

 

[elseven77]

they sound much better than the originally installed 6N1 and 6P1 the lamps are unused or used to a minimal extent, tested, the emission is well above the catalog level. perfectly balanced and matched in pairs measurement result: 6N1P lamp 1: Ia = 15.0/16.0mA [04-80] lamp 2: Ia = 15.0/16.0mA [04-80] where 100% for new lamps is 10mA 6P1P lamp 1: Ia = 52mA [06-84] lamp 2: Ia = 52mA [08-84] where 100% for new lamps is 45mA

 

[SIY]

they sound much better than the originally installed 6N1 and 6P1 the lamps are unused or used to a minimal extent, tested, the emission is well above the catalog level. perfectly balanced and matched in pairs measurement result: 6N1P lamp 1: Ia = 15.0/16.0mA [04-80] lamp 2: Ia = 15.0/16.0mA [04-80] where 100% for new lamps is 10mA 6P1P lamp 1: Ia = 52mA [06-84] lamp 2: Ia = 52mA [08-84] where 100% for new lamps is 45mA

OK, so they're matched only at one point on the characteristic. Hopefully, the circuit was designed by someone who knows how to deal with the actual mismatch in real tubes.

 

[elseven77]

you're right... I know one thing: a few new original pairs of tubes on this HTA-25B I tested it myself,, In my case they sounded better on the used ones Voshod 6N1P-EW - Swetlana 6P1P-EW

 

[solderdude]

sighted ?
(as in ... you knew what tubes were in and how they tested)

 

[pavlo_y0l0s]

I want to get this amplifier just so I can use the chassis as a base for my custom designed tube/transistor amplifier project lol