Preamplifier – PA3

Stereo playback of a music signal, from Source to Loudspeakers takes place through two independent amplifier lines. Engineering approach regardless of signal level should cover all the aspects for uncompromising transmission between the individual components. Each module is equally responsible for high fidelity reproduction, and so is the Preamplifier.

Adequate electrical insulation between the Source and the Amplifier, as well as between other Sources connected to the system is the basic function of the Preamplifier. Music signal contour reproduced by the Source, Preamplifier faithfully delivers it to the output in its natural form with quantity required for any Amplifier.

In our modular concept of transmission, with respect to the independent modules as individual stakeholders in the final performance, we treat the functionality of each one with special attention.

Therefore, final construction of our Preamplifier is composed of separate modules in two independent lines, with respect to left and right channels as individual.

Interface is located on the rear panel of the Preamplifier. Top quality NEUTRIK connectors for the left and right side are symmetrically placed, directly through and through connected to input PCB module for the shortest signal path to state-of-the-art BURR-BROWN Buffer Amplifiers and input switch consisting of special signal relays.

On central position, mains power provided by FURUTECH IEC Inlet directly connected to AC transformers filter PCB module. Specially designed Neutrik RowerCON achieve DC Power connection between audio and supply chassis.

Knob selector in OFF position provides two trigger outputs to control stand by condition of external amplifiers.

Output signal from each of the devices in the audio chain is the energy received from its power supply reliably following the music input signal. Therefore, we give great importance to this module.

Top-notch Power Supply construction realized as two symmetrically independent – left and right channel sectors. Two mains toroidal power transformers, huge banks total of 108 pieces low ESR capacitors and dual stabilization are the main core.

Active battery supply provides continuous listening regardless of the condition of the batteries, with extra-long on-battery autonomy. Functional control voltages provided by a third independent power supply with its own battery support. All of this provides exceptionally high audio performance.

Without exception, as with all of our Amplifier concepts, the Preamplifier is in dual mono configuration, a modular approach to sectors with different functionality.

In addition to the usual features such as line and balanced inputs and outputs, Preamplifier also offers headphone output with extremely high performance, phono input in MM or MC configuration and 2 dual-mono filtered outputs for true Bi-Amplifying, as well as for 2 independent active subwoofers.

All of this in pure analog topology where all amplifiers including buffers are in Class-A operation mode. Highest fidelity signal transmission and uncompromising isolation between the source and the amplifier are at the highest level possible.

Thermally and electrically completely sealed chassis made of 10mm CNC machined aluminum is maintaining the performance of the device as specified, without regard to external temperature and electrical influences. Massive heatsinks symmetrically placed on both sides, additionally keep constant chassis temperature with high thermal inertia to external changes.

As the preamplifier audio sector is the most sensitive part of the audio line, power supply and the audio section are in two independent chassis.

The entire chassis is grounded and electrically separated from audio ground, which ensures noise free signal transmission. Four massive absorbers as a base completely eliminate microphonic effects caused by external vibration.

Maximum output voltage:
– Main XLR 3-pole ground canceling,
THD = 0.0001% 10 Vrms, 600Ω Load
– Headphones 6.3mm Jack,
THD = 0.0001% 10 Vrms, 32Ω Load
– Slave output RCA,
THD = 0.0001% 10 Vrms, 1kΩ Load

Input impedance (Unbalanced/Balanced): 22kΩ

Output impedance
– Main, Slave output 50Ω
– Headphones output 0.1Ω

Gain:
– Unbalanced Input (CD, LINE) 6 dB
– Balanced Input 3 dB
– Phono: More available soon

Frequency Response (-3dB): 0 – 300 kHz

Signal to Noise Ratio (1kHz, 2Vrms): >130dB

THD (2Vrms, Load 600Ω): 0.0001%

Power consumption:
-Normal 20W
-Charge 15W
-Stand by (Triggered) 2W

Off output control (Trigger): 12V DC / 1mA

Dimensions (Total W x H x D)
– Amplifier 509 x 153 x 478 mm
– Battery supply 509 x 153 x 478 mm

Weight (Total): 45 kg

Specifications are subject to change due to imrovment, with highiest possible performance in mind..
Proudly designed, developed and handcrafted at Teoharov Audio Lab in Skopje, North Macedonia

TECHNICAL DATA

PRICE

Preamplifier – PA3

Stereo playback of a music signal, from Source to Loudspeakers takes place through two independent amplifier lines. Engineering approach regardless of signal level should cover all the aspects for uncompromising transmission between the individual components. Each module is equally responsible for high fidelity reproduction, and so is the Preamplifier.

Adequate electrical insulation between the Source and the Amplifier, as well as between other Sources connected to the system is the basic function of the Preamplifier. Music signal contour reproduced by the Source, Preamplifier faithfully delivers it to the output in its natural form with quantity required for any Amplifier.

In our modular concept of transmission, with respect to the independent modules as individual stakeholders in the final performance, we treat the functionality of each one with special attention.

Therefore, final construction of our Preamplifier is composed of separate modules in two independent lines, with respect to left and right channels as individual.

Interface is located on the rear panel of the Preamplifier. Top quality NEUTRIK connectors for the left and right side are symmetrically placed, directly through and through connected to input PCB module for the shortest signal path to state-of-the-art BURR-BROWN Buffer Amplifiers and input switch consisting of special signal relays.

On central position, mains power provided by FURUTECH IEC Inlet directly connected to AC transformers filter PCB module. Specially designed Neutrik RowerCON achieve DC Power connection between audio and supply chassis.

Knob selector in OFF position provides two trigger outputs to control stand by condition of external amplifiers.

Output signal from each of the devices in the audio chain is the energy received from its power supply reliably following the music input signal. Therefore, we give great importance to this module.

Top-notch Power Supply construction realized as two symmetrically independent – left and right channel sectors. Two mains toroidal power transformers, huge banks total of 108 pieces low ESR capacitors and dual stabilization are the main core.

Active battery supply provides continuous listening regardless of the condition of the batteries, with extra-long on-battery autonomy. Functional control voltages provided by a third independent power supply with its own battery support. All of this provides exceptionally high audio performance.

Without exception, as with all of our Amplifier concepts, the Preamplifier is in dual mono configuration, a modular approach to sectors with different functionality.

In addition to the usual features such as line and balanced inputs and outputs, Preamplifier also offers headphone output with extremely high performance, phono input in MM or MC configuration and 2 dual-mono filtered outputs for true Bi-Amplifying, as well as for 2 independent active subwoofers.

All of this in pure analog topology where all amplifiers including buffers are in Class-A operation mode. Highest fidelity signal transmission and uncompromising isolation between the source and the amplifier are at the highest level possible.

Thermally and electrically completely sealed chassis made of 10mm CNC machined aluminum is maintaining the performance of the device as specified, without regard to external temperature and electrical influences. Massive heatsinks symmetrically placed on both sides, additionally keep constant chassis temperature with high thermal inertia to external changes.

As the preamplifier audio sector is the most sensitive part of the audio line, power supply and the audio section are in two independent chassis.

The entire chassis is grounded and electrically separated from audio ground, which ensures noise free signal transmission. Four massive absorbers as a base completely eliminate microphonic effects caused by external vibration.

Maximum output voltage:
– Main XLR 3-pole ground canceling,
THD = 0.0001% 10 Vrms, 600Ω Load
– Headphones 6.3mm Jack,
THD = 0.0001% 10 Vrms, 32Ω Load
– Slave output RCA,
THD = 0.0001% 10 Vrms, 1kΩ Load

Input impedance (Unbalanced/Balanced): 22kΩ

Output impedance
– Main, Slave output 50Ω
– Headphones output 0.1Ω

Gain:
– Unbalanced Input (CD, LINE) 6 dB
– Balanced Input 3 dB
– Phono: More available soon

Frequency Response (-3dB): 0 – 300 kHz

Signal to Noise Ratio (1kHz, 2Vrms): >130dB

THD (2Vrms, Load 600Ω): 0.0001%

Power consumption:
-Normal 20W
-Charge 15W
-Stand by (Triggered) 2W

Off output control (Trigger): 12V DC / 1mA

Dimensions (Total W x H x D)
– Amplifier 509 x 153 x 478 mm
– Battery supply 509 x 153 x 478 mm

Weight (Total): 45 kg

Specifications are subject to change due to imrovment, with highiest possible performance in mind..
Proudly designed, developed and handcrafted at Teoharov Audio Lab in Skopje, North Macedonia

TECHNICAL DATA

PRICE