As with every "jack", also the Pentaconn will make short circuits when it is plugged in. Plugging in/out the Pentaconn is even worser compared to the 1/4" output as the Pentaconn will make 4 short circuits instead of 2 for the 1/4". This may result in a temporary overload of the amps which is...

Hi everybody. I am happy that V281-LE is now delivered to the customers. There had been lots of delays during production and delivery. But it still seems that there are some complaints about the 128-step reed-relay volume control. Like before inside the "old" V281 with the 128-step relay...

Hi Jeffrey. First of all, plugging in other than the original op-amps is NOT recommended at all !! Also, when some damages will appear, these are not covered by the warranty ! You can see as an example what happens when plugging in such devices: Sometimes it may work, sometimes not. DC was...

What does "TRUE BALANCED" mean concerning the Violectric amps. Although written many times, here again some explanations: There are more and more amps in the market, featuring a balanced headphone connector (4-pin XLR / Pentaconn) but only SE amps inside. So, these sockets are more a...

True Balanced in case of the Lake People and Violectric amps mean, that there are really 4 amplifiers inside. We like to express that because there are more and more amps in the market featuring balanced "convenience" headphone outputs but having only 2 amps. The only "cheating" amp in the...

B and S as part of the serial number had been denoted after the introduction of silver front panels

... the color of the front panel, sorry, now it's more clear. The cases had always been Nextel coated, except the FE edition (final edition) with a black anodized front and case, denoted "FE" in the serial number.

B means black, S means silver

There are 2 ways to connect a V280 to subsequent equipment. 1. (not for V280 FE) set the internal jumpers to have the unbalanced rear RCA connectors as outputs. The rear balanced inputs can be used also for unbalanced source with a RCA to XLR adaptor. On the RCA outputs the buffered input...

Here the brochures of the new HPA V202 and HPA V222 - hopefully now without typo ...

see post 326 https://www.head-fi.org/threads/violectric-hpa-v281-vorsprung-durch-balanced.705318/page-22#post-10807716

Some words about the differences between Niimbus US 4 / US 4+ / US 5 / US 5 Pro The audio circuitry and power supply circuitry is totally identical on all 4 items. This concerns the inputs (although US 4 offers less inputs), the line outputs, the headphone amps, the power supply. Nothing is...

There is no LED indicator in the volume knobs from any Violectric model. This (unfortunately very expensive) feature is reserved for our Niimbus line. Concerning the volume knob from V340/V380 it was initially intended to use the volume knob from V281 (without white mark). So are the official...

Nobody must be puzzled of not receiving his ordered HPA V280 amp. We shipped our complete inventory to Drop - nothing left in stock ! As far as I know Drop scheduled the delivery somewhen in July. Would like to hear some hopefully positive opinions ... But as the successors of V281 and V280...

... it maybe your source, it may be your headphones, it maybe your cables, it maybe your ears. But chances are very low that it is the amp. Anyway, that is the reason for the balance control.

Hello Everybody. Normally I don´t answer to posts like „Why do they use cheapo Neutrik XLR sockets instead of outstanding ones from the xxx brand”. But sometime I feel I have to adjust things … Neutrik is THE supplier for high quality XLR sockets and connectors. Among others they also offer RCA...

Today we hit the 500.000 mark. Thank you all for your interest in our products. We will continue and work hard to not disapoint you.

Ex works the unbalanced outputs from HPA V280 are set to 2 x stereo operation. But there are jumpers inside the amp to provide balanced operation for both ¼” phone jacks. Please see the attached pic from HPA V280. V280 open low res.jpg The 2 jumpers are close to the 4-pin XLR socket. "U"...

Just take a look at the manual which can be downloaded here US 4+ Manual 2018-en-2.pdf / US_4_Manual_2018-en-2.pdf In the technical data you can find the output impedance from the headphone outputs to be 0.1 Ohm unbalanced and 0.2 Ohm balanced. Cheers, Fried

... by the way, please see attached the manual from Niimbus HPA US 4+ US 4+ Manual 2018-en-2.pdf

Hello everybody. The Pre-Gain setting will no have any influence on the output impedance of Niimbus US 4 (+) amps. I also often heard that people like the "sound" of a specific gain setting better than other settings - but not neccessarily 0 dB. For my opinion there is no technical reason for...

to learn more please check the block circuitry of Niimbus HPA US 4+ US 4+ block circuit.JPG

@ rgs9200m Your questions: 1. OUTPUT GAIN: These switches control the level of the LINE OUTPUTS an have nothing to do with the headphone-amp section of HPA US 4+. These switches had also been part of V281, but internally. On US 4+ they are accessible from the outside. Reason:The Niimbus US 4+...

@ Arniesb You will have more attenuator travel on your V280 when you switch the Pre-Gain to -6 or -12 dB The technical improvements of Niimbus US 4 and US 4+ over the current Violectric models: Due to the fact that we managed to create a stable amp with a gain of -4 dB (+2 dB for balanced...

I apologize for the inconveniences with the remote control for Niimbus US 4+ and the missing manual in english. Both will be delivered ASAP when they are available. Meanwhile please see the software control of Niimbus US 4+ attached. Thank you, Fried US 4+ software-en.pdf