Descrizione
Most desktop amplifiers try to be everything at once and end up compromising each channel they touch. A monoblock takes the opposite route: one amplifier, one speaker, one power supply, no shared ground and no crosstalk between channels. The V3 Mono applies that discipline at desk scale. Add one unit to each speaker and the system grows channel by channel, from a single block to 2, 2.1, 3, 4 or 5 channels, without ever asking one circuit board to do two jobs at once.
The load bearing part is a Texas Instruments TPA3255 Class D chip running with Post Filter Feedback, a correction loop that measures the output after the filter and pulls it back toward the intended signal. The measured result is a SINAD of 101dB through the balanced input and 93dB through the unbalanced input, a signal to noise ratio of 123dB and total harmonic distortion below 0.006 percent. In plain terms, the noise floor sits at 31 microvolts, which is quiet enough that sensitive horn or planar speakers reveal the recording rather than the amplifier.
Channel configuration is handled by two input paths rather than a menu. Balanced XLR and 6.35mm TRS share one set of sockets, unbalanced RCA sits on the other, and the RCA input carries a gain switch between 19dB and 25dB so a low output phono stage or a quiet streamer can be brought up to level without a preamplifier. Speaker connections accept banana plugs or bare wire, and the load tolerance covers 2 to 8 ohms, which means the amplifier will drive awkward low impedance speakers that smaller desktop units refuse.
Inside, the parts list reads like a deliberate choice rather than a cost exercise: Japanese NICHICON and ELNA capacitors, German WIMA capacitors and Sumida inductors. The op-amp sits in a DIP8 socket, so Sparkos SS3602, MUSES02, OPA2604, OPA2134PA, OP249, AD827, LM4562 and LME49720HA chips can be swapped in without a soldering iron. Auto power on and off follows the signal, the chassis itself acts as the heatsink so the amplifier holds full output for hours, and the supply accepts anything from DC 32V, where it delivers 100W into 4 ohms, up to DC 48V, where it reaches 240W into 4 ohms.
One amplifier, one speaker, and nothing shared between them.
Key Features
- ✦ Monoblock design: one amplification channel per unit, scaled to 2, 2.1, 3, 4 or 5 channels by adding units
- ✦ Texas Instruments TPA3255 Class D chip with Post Filter Feedback for measured linearity
- ✦ SINAD 101dB on the balanced input and 93dB on RCA, with a 123dB signal to noise ratio and a 31 microvolt noise floor
- ✦ Balanced XLR and 6.35mm TRS inputs alongside RCA, with RCA gain switchable between 19dB and 25dB
- ✦ Swappable DIP8 op-amp socket accepting Sparkos, MUSES02, OPA2604, OPA2134PA and other popular chips
- ✦ Audiophile component set including NICHICON, ELNA, WIMA and Sumida parts, with auto power on and off
Technical Specifications
- Amplifier Chip: Texas Instruments TPA3255 Class D with PFFB
- Channel: 1.0 monoblock
- Rated Power Output: 240W into 4 ohms with a 48V supply, 100W into 4 ohms with a 32V supply
- SINAD: 101dB (XLR), 93dB (RCA)
- Signal to Noise Ratio: 123dB
- Dynamic Range: 123dB
- Total Harmonic Distortion: Below 0.006 percent
- Gain: 20dB on XLR and 6.35mm TRS, 19dB or 25dB on RCA
- Speaker Impedance: 2 to 8 ohms
- Frequency Response: 10Hz to 30kHz, within plus or minus 0.06dB
- Input Voltage Range: DC 32V to 48V
- Inputs: Balanced XLR, 6.35mm TRS, RCA
- Outputs: Speaker terminals accepting banana plugs or bare wire
- Op-Amp: DIP8 socket, user swappable
- Cooling: Chassis integrated heatsink with ventilated sides
- Body: Metal
- Certification: CE
Where It Belongs
This amplifier belongs on a desk in front of two bookshelf speakers, in a nearfield studio setup, or in a small listening room where a full size power amplifier would be absurd. It also fits home theatre builds where each channel is better served by its own block, and DIY audio projects where the op-amp socket and the swappable supply make the unit a platform rather than a sealed box. If you own efficient speakers and want the noise floor gone, the monoblock arrangement is the part that matters: each driver gets a dedicated supply and there is nothing to bleed between left and right.
Frequently Asked Questions
Q: Why choose a monoblock instead of a normal stereo amplifier?
A monoblock gives each speaker its own amplifier, power supply and ground reference. That removes crosstalk between channels and reduces the load on the supply, which is audible as a cleaner image and a lower noise floor on efficient speakers. It also lets the system grow one channel at a time.
Q: How much power do I actually get?
The output depends on the supply. With a 48V supply the amplifier delivers 240W into 4 ohms. With a 32V supply it delivers 100W into 4 ohms. Both figures relate to a single channel, since this is a monoblock design.
Q: Can I change the sound signature?
Yes. The op-amp sits in a DIP8 socket, so chips such as Sparkos SS3602, MUSES02, OPA2604, OPA2134PA, OP249, AD827, LM4562 and LME49720HA can be fitted without soldering. That is the most direct way to tune the presentation to taste.
Q: Does it get hot?
The chassis is part of the cooling design, so the surface reaches a noticeable temperature during long sessions. That is heat transferring away from the amplifier chip as intended. The case has vented sides for airflow, and a small fan can be added if the amplifier runs at full output for hours in a closed cabinet.
Q: Do I need a preamplifier?
Not necessarily. Balanced XLR, 6.35mm TRS and RCA inputs are all present, and the RCA path offers 19dB or 25dB of gain, so most sources can connect directly. A preamplifier is only needed if your source has very low output or you want switching between several sources.
Q: What is included with a set?
Configuration depends on the bundle you choose. Options include the amplifier on its own, a set with a 48V 5A power supply, and 48V 10A supply versions with a power filter or a fan. For a stereo pair, one 48V 10A supply can feed two units.
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