Beranda » JMF Audio » JMF PRS 1.5 reference preamplifier

JMF PRS 1.5 reference preamplifier

Kode : jmf-pream
Berat : 1200 gram
Stok : Ready Stock (1 pcs)
Kondisi : Baru
Kategori : JMF Audio, Preamplifier
Dilihat : 755 kali
Review : Belum ada review
Hubungi kami secara langsung untuk pemesanan yang lebih cepat!
JMF PRS 1.5 reference preamplifier

*Pemesanan dapat langsung menghubungi kontak di bawah ini:

*Prices Call Us
Ready Stock / jmf-pream
INFO HARGA
Silahkan menghubungi kontak kami untuk mendapatkan informasi harga produk ini.

Bagikan informasi tentang JMF PRS 1.5 reference preamplifier kepada teman atau kerabat Anda.

Deskripsi JMF PRS 1.5 reference preamplifier

JMF PRS 1.5 reference preamplifier

The preamplifier, key element in the system, is mandatory to take advantage of analog sources like vinyl discs and to use the digital to analog converters at full resolution. 

The impossible had to be made possible: to insert an element and not to lose any detail of sound. 

The research and the development of the PRS1.5 actually took us many years… 

JMF Audio had designed excellent preamplifiers in the past. One of them has even become legendary in Asia. However the new challenges for the ultimate reference JMF Audio preamplifier were extremely severe:

1. For sound quality the goal was to equal a fixed passive attenuator carefully designed by JMF Audio.
2. For precision, left/right perfect symmetry, low glitch on changes, precisely defined steps had to be assured.
3. For ease of use, remote control operation had to be possible as with our DXC D/A converters.

Point 1. was a test that none of the preamplifiers we tested passed successfully. (obviously, we thought)
Point 2. was easy to fulfill for integrated circuits based preamplifiers but rarely possible on the best sounding ones which volume control were based on resistor ladders or potentiometers. Resistor ladder units featured large glitches.
Point 3. was not a problem for many preamplifiers but the best sounding ones were passive and not remote controllable though.

The PRS1.5 eventually saw the light. Not only it is the only preamplifier to successfully fulfill point 1, but it also surpasses by far this target ; mostly thanks to the hand calibrated input/output stages and impedance matching provided by JMF Audio’s SSA Super Symmetrical Analog technology!

 

The PRS1.5 is a dual mono, fully balanced design that embeds the innovative CSV volume control !

>  CSV is a fully passive volume control system based on a digitally controlled switches network.

>  CSV by concept features zero noise, zero distortion, zero phase shift, infinite headroom!

>  CSV is sealed and shielded in a massive tooled block of aluminum with the JMF Audio logo engraved on.

>  CSV features a quadruple redundancy for an expected life time superior to the best potentiometers.

>  CSV is input and output buffered in the PRS1.5 by JMF Audio’s SSA Super Symmetrical Analog technology.

After selection on technical aspects, refined selection on measurement, the final decision on absolutely all the audio components that the PRS1.5 contains has been taken after long listening tests in the newly built JMF Audio’s studio. The audio boards were designed in the great JMF Audio’s tradition (PGP gold) and have benefited of the results of the now JMF Audio’s 30 year experience in audio. They are mounted on a suspension system that makes them quasi acoustically floating and immune to vibrations. 
The PRS1.5 features JMF Audio’s direct coupling design (no capacitors on the audio path).
Each input selector is shielded for the best signal integrity and lowest cross talk.
Absolutely all analog parts are drastically selected and hand mounted.

The integrated power supply, free of radiation, is double shielded and located next to the audio circuits for an instantaneous energy delivery following JMF Audio’s proprietary DUAL-STAR-POWER concept. Before delivery every PRS1.5 undergoes a burn-in phase and a listening test with comparison to our reference.

Beside being the most transparent preamplifier,
the PRS1.5 is the ultimate JMF Audio HQS power amplifiers’ driver !

 

 

Features:
Balanced inputs 3  (IN0, IN1, IN2)
Unbalanced inputs 3  (IN3, IN4, IN5)
Balanced outputs 2  (OUT1, OUT2)
Unbalanced outputs 1  (OUT3*)
Volume display [30] to [99]
Relative gain setting between sources [-9] to [ 6] display for -9 to +6dB gains
Source display [i0] to [i5]
*Out3 can be set to follow the volume control
or set as direct (DI) for a tape loop
or to drive a headphone amplifier
[di] display on selection,
recalled by a dot light on normal use
Ground connection (earth) dia. 4mm banana type
Remote control IR, all functions using MBR-1
Massive aluminum volume control button /  double bearing / massive aluminum compartment / smooth rotation
Massive anodized aluminum chassis, mounted on special damped and anti skidding JMF Audio feet
Gold plated analog mono boards embedding CSV and mounted on suspensions for acoustical isolation
Specifications:
Input impedance > 5k ohm / XLR and RCA inputs
Maximum input level +22dBu XLR bal / +16dBu RCA
On normal output OUT1 (OUT2), at volume max:
Bandwidth 1Hz .. 100kHz  (+0.0 / –0.1dB)
20Hz ..20kHz   (+0.0 / –0.0dB)
Signal to noise ratio > 130dB        (+22dBu 1kHz narrow band)
128dBA typ.   (+22dBu 1kHz in / bw. 22..22k Hz)
THD+N 0.0005% typ. (+22dBu 1kHz in / bw. 22..22k Hz)
Crosstalk left/right < -120dBA
Output impedance 50 ohms
Maximum gain output/input 0dB (XLR bal in)   +6dB (RCA in)
Volume control range 70 steps of 1dB
Volume control step precision better than 0.05dB above volume [40]
Volume control left/right level mismatch  < 0.1dB above volume [40]
Specific to modular output OUT3: 
Maximum gain in variable mode (at volume max) 0dB (RCA in)   – 6dB (XLR bal in)
Output impedance in variable mode 50 ohms
Gain in direct mode (DI) 0dB (RCA in)   – 6dB (XLR bal in)
Output impedance in direct mode (DI) 600 ohms
Power consumption < 25W in operation   (< 1W in standby)

Ditambahkan pada: 7 December 2017

Belum ada ulasan untuk produk JMF PRS 1.5 reference preamplifier

Silahkan tulis ulasan Anda

Produk Terkait JMF PRS 1.5 reference preamplifier

STOK HABIS
BIK Pre Amplifier BPR-5000

*Pemesanan dapat langsung menghubungi kontak di bawah ini:

Rp 7.800.000
Habis / AMP-11
Rp 7.800.000
Habis / AMP-11
QUICK ORDER
JMF Audio HQS6002 Stereo Power Amplifier

*Pemesanan dapat langsung menghubungi kontak di bawah ini:

*Prices Call Us
Ready Stock / AMP-09
*Prices Call Us
Ready Stock / AMP-09
QUICK ORDER
JMF Power Amplifiers HQS 9001

*Pemesanan dapat langsung menghubungi kontak di bawah ini:

*Prices Call Us
Ready Stock / hqs9001
*Prices Call Us
Ready Stock / hqs9001

Mungkin Anda tertarik dengan produk terbaru kami

QUICK ORDER
Paket Home Theater Elara

*Pemesanan dapat langsung menghubungi kontak di bawah ini:

Rp 59.899.999
Ready Stock / theater1
Rp 59.899.999
Ready Stock / theater1
QUICK ORDER
Paket Speaker Karaoke

*Pemesanan dapat langsung menghubungi kontak di bawah ini:

*Mulai Rp 28.500.000
Ready Stock / ktv5
*Mulai Rp 28.500.000
Ready Stock / ktv5
QUICK ORDER
Paket Karaoke 3 BIK Audio

*Pemesanan dapat langsung menghubungi kontak di bawah ini:

Rp 36.200.000
Ready Stock / ktv3
Rp 36.200.000
Ready Stock / ktv3
SIDEBAR