Car stereo installation

Va210

" polypropylene capacitors on signal path and input wiring with

Class A input preamplifier fully made with Siliconix© jfets, only Wima© "MKP4" polypropilene capacitors on signal path and input wiring with Monster Cable© "Interlink 300MKII".
Voltage amplifier totally made with MIL-JAN grade full class A complementary bits, with auto-regulation of thermal working point.
Output devices are IR© complementary mosfets each capable of 180W and continuous 21A.
Capacitor bank close to output devices is ultra fast and low-ESR, capable of 42 Joule (VA210) of immediately available energy.
Output wiring speakers by Monster Cable© "OMC".
Power supply wholly built with Magnetics© MIL-GRADE ferrites, United Chemicon© low-ESR capacitors and IR© power mosfets each capable of continuous 110A.
24K gold plated copper with high thickness tracks Printed Circuit Board (top grade FR4 material).
Thermal dissipation by internal cooling tunnels, integrated and thermo regulated fans.
Battery supply connectors are Anderson© "Power pole 80A" for 0.0002 ohm max contact resistance.
Chassis made by CNC and Laser cut machines, hand brushed natural aluminum, fully inox screw bolts.

Va250

1 - Power Supply.
Also for VA250 no compromise ever occurred; this amplifier has been designed to be capable of supplying (@12V battery) more than 500 W of regulated and clean DC power ready to be used in very short time. It works at a frequency higher than the standard one, to make it more compact, light, insensible to voltage variations of vehicle, making useless even for this model the presence of large and expensive battery capacitors.

2 - Pre-amplifier.
VA250 makes use of the same fet circuital design of VA210; this pre-amp can do everything it has been designed for: extreme sound transparency... as it does not exist!

3 - Amplifier.
VA250 can boast the same unusual circuital solution of VA210, witch use in Car environment has never been tried before; COMPLETE SEPARATION OF THE SPEAKERS FROM AMPLIFICATION CIRCUIT [Total feedback= 0]. In short, this means an extreme control of speakers drives on outputs, with a realism, a speed and precision in the micro detail really exciting.

4 - Protection circuit.
VA250 has simple protection circuit but at the same time intended not to interfere at all with the big and very fast current drive of the speakers (20 Arms peak in less than 1µS). The heat-sink system deserves a separate mention: it is studied to assure a full power running even in conditions of poor ventilation (unfortunately very frequent), avoiding incidental and premature shutdown.

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Ra 220

$2,200.00

2x 200W Rms nominal power
bridgeable 500Wrms mono nominal power
built as "DUAL MONO" (fully separate 2 main boards);
new pre-amp design with only ONE JFET OP-AMP in the signal path
"audiophile grade" audio quality - Zero Feedback Ratio Design;
two independent 600W DC (@12V) high frequency switching power supplies;
no one aluminum capacitor in the signal path;
6 power MOSFETS 200W each on audio output stage;
intelligent electronic protection design capable to put out high impulsive currents;
one of the most compact amp in its category;
hand polished inox cover and black anodized base.
high flux capacity air cooling with therm-controlled fans

Ra 275

$1,000.00

2x 75W Rms nominal output power;
"audiophile grade" audio quality - Zero Feedback Ratio Design;
240W Rms mono bridged (into 4 ohm);
tri-mode operation (mono + stereo without any switch or adapter);
500W DC (@12V) high frequency switching power supply;
adjustable bass boost eq. @40 hz to correct speakers roll-off;
no one aluminum capacitor or mechanical switch on signal path;
200W complementary power Mosfet on audio output stage;
intelligent electronic protect design capable to put out high impulsive currents;
very compact outline, with integrated high flux fan;
fine chromed and polished finish.

RA 150m Mono

$1,000.00

mono amplifier dedicated to low-mid, mid range or full-range 2 or 3 ways system;
The best choice also for center channel in 5.1 systems
Output power 150Wrms, 240Wrms into 2 ohm;
"audiophile grade" audio quality - Zero Feedback Ratio Design;
500W DC (@12V) high frequency switching power supply;
Bessel linear phase and low noise filters;
high pass for external amps (12Db/ott) can be tuned from 250Hz to 3.5KHz
low pass filter (18Db/ott) can be tuned from 250Hz to full-range;
no one aluminum capacitor or mechanical switch on signal path;
200W complementary 2 pair power Mosfet in the audio output stage;
intelligent electronic protect design allow large extra output currents;
very compact outline, with integrated high flux fan;
fine chromed and polished finish.

Ra 475x

$1,990.00

technical descriptions

4x 75W Rms nominal power;
built as "DUAL 2 channels" (fully separate 2 main boards);
"audiophile grade" audio quality - Zero Feedback Ratio Design;
2x 240W Rms bridged mono;
tri-mode operation (mono + stereo without any switch or adapter);
by-passable low-pass and high-pass internal cross-over fully independent in tuning (50-3.5K)Hz;
perfect for filtering points as sub & low-mid; low-mid & high-mid; high-mid & tweeter;
two independent 500W DC (@12V) high frequency switching power supplies;
no one aluminum capacitor in the signal path;
200W complementary power Mosfet (each) on audio output stage;
intelligent electronic protection design capable to put out high impulsive currents;
one of the most compact 4ch. amp in the market in its category;
fine chromed and polished finish.

Bobby Joe's Car Audio

Bobby Joe's Car Audio

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Celestra USA Distributor 2020 Amplifiers

CELESTRA VA210