Hafler P3100 150W 2-Channel Studio Power Amplifier - Long & McQuade Music Educator Site
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Hafler P3100 150W 2-Channel Studio Power Amplifier

Departments > Pro Audio & Recording > Power Amps & Crossovers > Studio amplifiers > Hafler > P3100 150W 2-Channel Studio Power Amplifier
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The Hafler P3100 is a 2-channel power amplifier that is equally at home with the most discerning audiophile as with the most demanding studio recording engineer.

  • Patented Trans Nova technology with lateral MOSFET output topology

  • 150 watts per channel into 8 Ohms (200 w/channel in 4 Ohms)

  • Ultra quiet performance with toroidal transformer and oversized heatsinks

  • Ideally suited for audiophile and professional studio recording

Inside the P3100 is the latest refinement of the Trans*Nova (TRANSconductance Nodal Voltage Amplifier) circuit that was developed by industry guru Jim Strickland. The Trans*Nova circuit squeezes the most out of every component to reduce the gain stages down to three in lieu of the five typically employed by others. The shorter path results in a much more open sounding and realistic sound stage.

In this latest iteration, a toroidal power transformer has been introduced. This has a lower output impedance and produces far less noise than a conventional E-lam transformer. The result is a tighter, more defined bottom end. As well, toroidal transformers are inherently self-shielding which reduces the amount of potential low frequency and rectifier noise introduced into the audio signal path. Passive convection cooling, with over-sized heatsinks, surround the amplifier eliminating the need for a fan, thus enabling the P3100 to be used in the most intimate installations. The front panel includes individual level adjustments to offset room imbalances, signal present and ballistic LED metering, along with indicators for faults due to excessive heat or short circuits. A soft start power-on switch protects loudspeakers from turn on transients that could reduce lifespan. The rear panel sports a choice of XLR, TRS and gold plated RCAs for greater flexibility. Output connections feature gold-plated binding posts that can adapt to all popular speaker cable sizes.

In use, the Hafler P3100 is rich in detail, depth of field and musicality. With 150 watts of available power per channel at 8 Ohms and 200 watts at 4 Ohms, the P3100 has plenty of headroom to drive the most power-hungry loudspeaker. Bridged in mono, 400 watts are available for sub-woofers or as a matched pair for larger 2-channel setups.


Power Rating:
150 Watts/Channel @ 8 Ohms
200 Watts/Channel @ 4 Ohms
400 Watts bridged/mono @ 8 Ohms

Total Harmonic Distortion (THD): < 0.15% (15Hz-50kHz)

Signal-to-Noise: 102dB "A" weighted

Full Power Bandwidth: 0.15Hz to 300Khz (+0/-3dB)

Slew Rate: 100V/s

CMRR (Common Mode Rejection Ratio): 75dB at 1kHz

Input Impedance: 47k Ohms per phase balanced

Gain: +14dB min. / +29dB max

Input Sensitivity Range:
620mV to 3.5V (@ 8 Ohms) per phase balanced
505mV to 2.8V (@ 4 Ohms) per phase balanced

Damping Factor:
400 (to 1kHz)
200 (to 10kHz)
18 (to 100kHz)

Power Consumption:
120W / 1.0A @ 120VAC (idle power)
350W / 2.9A @ 120VAC (1/8 power 8 Ohms)
600W / 5.0A @ 120VAC (max. power 8 Ohms)

Indicators: Power, signal, clipping, thermal, short

Dimensions: 19" W x 9.875" D x 3.5" H (2 rack spaces) (483 x 251 x 89mm)
Weight: 23 lbs (10.43kg)

A very nice amplifier7 of 7 customers found this review helpful

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Product ExperienceI own it
Closest StoreOttawa, Ontario
Purchased this amplifier from Long & McQuade (Ottawa). Everything worked out well: the packaging is top notch and the amp's physical attributes are excellent. Smaller and A bit heavier than I was expecting and so it looks serious at a glance. I let it warm up for about 10 minutes before starting to listen to it. Right away, this amp has a special quality. It does run on the warm to hot side, so it needs to be able to breathe. One hour into it and I'm thinking I should order an additional unit! It just sounds so right. The mids make you think this is a tube amp as they are very detailed. The highs are extended and smooth. The bottom end was solid and the soundstage depth excellent (I love that). This is my first MOSFET amp and I don't think I would go back to a traditional amp SS amp. I do own a tube amp (A dynaco Series III also made by Radial Engineering) and it will stay in the main system for now as my winter amp. If you need ONE good amp with a more than pleasing, detailed smooth sound, this is the one (and I've owned lots of amps in the past). Recommended.
Posted by Jules Lefrancois on Dec 10, 2019
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