Previous Demo Arc Audio Xdi 650.1 Monoblock Subwoofer Amplifier.
Comes complete with all hardware but is missing the original box.

• Bridged Mode Auto Detect Turn-On works with most chip based OEM Headunits.
• Fully Balanced Input Stage significantly increases flexibility.
• RCA Inputs are compatible with speaker level inputs.
• Micro Processor controlled protection including Short Circuit, Thermal, DC Offset, Over-voltage, and Under-voltage.
• Fault Code Storage of the last protection code detected.
• Quick Disconnect speaker terminal plugs.
• Audiophile Class D output filter networks.
• Remote Bass Level control capability for quick tweaking of the low-frequency level.
• 1 Channel at 4 ohms: 185 Watts
• 1 Channel at 2 ohms: 350 Watts
• 1 Channel at 1 ohms: 650 Watts
• Frequency Response: 20Hz - 230kHz
• Crossover Range: 30Hz - 230Hz 24dB
• Bass Boost: Variable 0-12dB
• Bass Boost Freq.: Variable 30Hz - 125Hz
• Remote Level Control Included: Yes
• Input Sensitivity (Low): 200mV - 3.5V
• Fuse: 2 x 30 amp
• Cosmetic Trim: XDi Level 1
• Dimensions: 9.020"(L) x 6.268"(W) x 2.162(H)

All Audio Intensity Enclosures are computer designed for maximum performance, CNC cut for maximum precision and hand assembled with tremendous pride.  The subwoofer system includes woofer preloaded and prewired into enclosure making it ready to install and enjoy! Arc Audio Subwoofers are not sold separately due to company guidelines.

Enclosure Specs:

Woofer(s): Arc Audio XDI series 12"

Number of Subs: 1

Power Handling: 250w RMS / 500w Peak

Design: Ported

Enclosure Net Volume(after port/speaker displacement) :  2.0 ft^3

Dimensions: 26" Wide x 14" Tall x 8" Deep 

Available Colors : Gray or Black

Final Impedance: 1 ohm or 4 ohm

Weight: 47lbs

Previous Demo Arc Audio XDI 1100.5 5 Channel Amplifier.

Comes complete with all hardware but is missing the original box.

Previous Demo Arc Audio SE2300 2 Channel Audiophile Amplifier.
Comes complete with all hardware, manual and the original box.

2 Channels @ 4 ohms 330 Watts
2 Channels @ 2 ohms 660 Watts
1 Channel @ 4 ohms (bridged) 1300 Watts
1 Channel @ 2 ohms (bridged) 1300 Watts
Frequency Response 4Hz - 100kHz
Crossover Range 30Hz - 500Hz
Crossover Range X10 300Hz - 5500kHz
Bass Boost 0 - 15dB @ 20Hz - 80Hz
S/N Ratio 90 dB (RCA In)
Input Sensitivity (Low) .3V - 4V
Input Sensitivity (Bal) .4V - 8V
Max current draw 222A @ 1800 Watts 20% THD
Idle Current 1.14 Amp
Fuse 3 x 40 Amp
Dimensions 19.5"(L) x 8.0" (W) x 2.5"(H)

Signature Edition by Robert Zeff is our no-compromise, high power, audiophile amplifier designed and engineered by Robert Zeff and the staff at Nikola Engineering. This design is taken from Roberts many years of experience in both professional and the car audio industries where he daily used, repaired and built high power, high fidelity amplifiers. With these lessons well learned over 30 years, he finally had the opportunity to make for ARC Audio the no compromise, no limits amplifier he had always dreamt of.

Signature Edition is a Hard Bias Class A/B amplifier. A simple Class B amplifier uses 2 output transistors to supply the current that moves the speaker. The positive transistor will push the woofer out and the negative will pull it back. In this design, only 1 transistor is working at any given time. It is the transition between positive and negative that leads to the higher distortion that makes a Class B amplifier unacceptable for audio reproduction. In most cases, a bias circuit is added to a Class B amplifier making it a Class A/B. The Bias circuit improves the distortion by slightly turning on the unused output device while current is flowing across the other. The more bias you add the lower the distortion but there is a side effect. Heat is created as the 2 output transistors are both on at the same time. The more bias you add the better it sounds but the more heat you produce but heat changes the natural bias of the output devices.

More heat equals more bias until you reach the point of over bias and the amplifier fails. The trick to the Signature Edition Bias circuit is managing the bias current at any temperature. By carefully matching the bias of every amp we are able to maintain stable bias across the temperature range allowing the technician "dial in" much more bias than a conventional class A/B amplifier. This is one of the key elements to the Signature Editions amazingly transparent sound.

The key to running so much bias is heat management. Signature Edition has a unique heat sink design that uses a 4" fan mounted in the center of the circuit board to force cool air in a cross flow pattern across a massive finned heat sink before exhausting it from the ends. This design minimizes the effects of installation location on the thermal performance of the amplifier. Mounted upside down, under or behind a seat or beneath a panel Signature Edition will perform equally well.

To further improve the dynamics and efficiency the Signature Edition amplifier exclusively uses stiffly regulated, fully isolated power supplies. Regulation not only improves the damping factor and overall control of an amplifier but it eliminates any effect of voltage drops in the charging system may have.

Audiophile sound quality based design
Designed by Robert Zeff
Class A/B switching design
Microprocessor controlled design
Microprocessor controlled Code based flashing diagnostics
Concealed adjustment controls
Open architecture adjustable crossovers on all channels HP/BP/LP/FP
12/24Db per octave selectable crossover slopes on all channels
Internal chassis force cooled speed controlled fan for optimum cooling
Hi/Low-level balanced switchblade RCA inputs for maximum system integration
RJ45 Ethernet input connections for true balanced input connections
Block type terminal connections
256 color user selectable illumination circuit
Combined Bias circuit and temperature regulation circuit to regulate bias and lower THD at any point in total thermal cycle
Microprocessor high voltage power supply allows the amplifier to optimize power output at different ohm loads without the loss of efficiency or sound quality
Vdrive based preamp stage improves efficiency lower internal signal loss
Handpicked output devices used on all SE amplifiers.

All Audio Intensity Enclosures are computer designed for maximum performance, CNC cut for maximum precision and hand assembled with tremendous pride.  The subwoofer system includes woofer preloaded and prewired into enclosure making it ready to install and enjoy! Arc Audio subwoofers are not available separately due to company guidelines.

Enclosure Specs:

Woofer(s): Arc Audio ARC series 12"

Number of Subs: 1

Power Handling: 350w RMS / 700w Peak

Design: Sealed (slim)

Enclosure Net Volume(after port/speaker displacement) :  .1.1 ft^3

Dimensions: 26" Wide x 14" Tall x 8" Deep 

Available Colors : Gray or Black

Final Impedance: 1 ohm / 2 ohm

Weight: 38lbs

 All Audio Intensity Enclosures are computer designed for maximum performance, CNC cut for maximum precision and hand assembled with tremendous pride.  The subwoofer system includes woofer preloaded and prewired into enclosure making it ready to install and enjoy!

Enclosure Specs:

Woofer(s): Arc Audio ARC series 10"

Number of Subs: 1

Power Handling: 250w RMS / 500w Peak

Design: Sealed (slim)

Enclosure Net Volume(after port/speaker displacement) :  .75 ft^3

Dimensions: 24" Wide x 12" Tall x 7" Deep 

Available Colors : Gray or Black

Final Impedance: 1 ohm / 2 ohm

Weight: 29lbs