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Hybrid Audio Unity Series U1A Amplifier - Previous Demo
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Hybrid Audio Unity Series U1A Amplifier - Previous Demo
This U1A Unity amplifier was pervious used on a display board for tradeshow use. Less than 20 hours playtime. It looks and sounds like new. It does not include the original box and full 1-year warranty applies
Unity Amplifiers are designed to be integrated into your sound quality system with a plethora of options; they offer a refined balance of beauty, efficiency, power, size, performance, and value.
With flexible and bypassable onboard crossover options, the Unity U1A 1-Channel amplifier works well with a wide variety of system choices. The beautiful tempered glass cover and understated looks fit well in any install.

Unity U1A Specifications

• Class “D” High-Current Operation
• 2 Ohm Stable
• Spec Audiophile Grade Components
• High-Efficiency PWM Power Supply
• Multi-Stranded Power Toroid
• MOSFET Transistors
• Oversized Capacitor Banks
• Discrete Mount Power & Speaker Terminals
• Variable Low Pass Crossover 50 - 250 Hz
• Circuit, Thermal and Overload Protection
• Power and Protection Indicator
• Remote Level Control

• Power RMS @ 4 ohms: 600w x 1
• Power RMS @ 2 ohms: 1000w x 1
• Low Pass Filter: 50-250 Hz
• Frequency Response: 10-250 Hz
• Signal to Noise Ratio: >100 db
• Input Sensitivity: 350 mV - 6 V
• Input Impedance: 22k Ohm
• Minimum Speaker Impedance: 2 Ohm mono
• Fuse Rating: 30A x 3
• Dimensions (mm): 185 x 55 x 370
• Dimensions (in): 7.3 x 2.2 x 14.6

 

 

 

$ 749.99 $ 350.00
ARC Audio MOTO 720 4 Channel Amplifier Hi-Output Powersports Amplifier - Previous Demo Sale
ARC Audio MOTO 720 4 Channel Amplifier Hi-Output Powersports Amplifier - Previous Demo
Perfect working condition, Excellent cosmetic condition.
Does not include the original box


The MOTO 720 amplifier delivers more power and features from the compact HD motorcycle-specific chassis of the legendary MOTO 600.4. While it carries the MOTO category name, many ARC Audio dealers find the compact 8.125 by 5.5-inch footprint ideal for under-seat in exotic cars and behind-seat installations in trucks.

The MOTO720 delivers an impressive 720 watts of power across its four output channels and up to 360 watts when bridged to a single four-ohm speaker. The Load Select switch adjacent to each speaker connection plug allows installers to optimize the power production capabilities for each installation. This flexibility is ideal for side-by-side and automotive applications that use front speakers that need full power at four ohms and a subwoofer that presents a bridged four-ohm load. New speaker terminal blocks integrated into the amplifier chassis replace the removable connectors on the MOTO 600.4 to deliver solid and reliable power delivery in even the harshest of conditions.

Signal connections are made using the same quick-connect plugs that ARC Audio has used for speaker-level inputs on their amplifiers for decades. These plugs have proven their reliability and durability in thousands of installations and are compatible with the wiring in the MPAK kits and the PSM digital signal processor connections. These same input connectors are plug-and-play to the provided RCA signal input dongles that come with the amplifier. Input level range switches have been added to the front panel to make it easy for installers to switch between high- and low-level inputs. Each pair of channels features an adjustable sensitivity control that allows the amp to make full power with signals ranging from 200mV to 4V in low-level mode or 600mV to 14.0V in high-level mode.

Defeatable high-pass and low-pass crossovers that are adjustable from 50Hz to 500Hz allow each pair of channels to be configured for full-range operation, or use with a subwoofer and accompanying speakers. The high-pass crossover can also be used to optimize the performance of speakers like the MOTO 602 or the MOTO602-HD high-efficiency coaxial speakers.

The amp can be configured to work with a single pair of inputs and knowing the enthusiasm of some of our clients, the amp has a 2-channel bridged mode that delivers 360 watts into a pair of four-ohm speakers.

All the sensitivity and crossover adjustments are made by removing the machined aluminum top-panel of the amplifier, so the system is easy to fine-tune once in place in a motorcycle fairing or under the dash of a side-by-side. This same removable top logo panel also prevents water from entering the switches on the top of the amplifiers.

The remote turn-on detection circuit has been upgraded to include options for DC Offset and Signal detection. These options ensure your installer can integrate the amp efficiently into any vehicle without the need for external processors.

Power and ground connections are made using a set of proprietary terminal blocks that will accept 8-AWG cables to ensure reliable performance. The remote turn-on connection moves to a similar dedicated terminal block beside the speaker terminals in this new design.

The MOTO720 also incorporates a unique microprocessor design that monitors the operation and health of the amplifier across multiple zones. In the event of an issue, the onboard microprocessor will flash a sequence of lights displaying a unique code to identify faults in the installation or system component failure such as a damaged speaker or short-circuited speaker cable. An internal fan is controlled by the microprocessor to ensure the amplifier stays cool and sounds great in even the hottest of weather conditions and volume levels.

While the amp isn’t considered “waterproof”, the main circuit board of the MOTO720 has two conformal coating layers to prevent damage in high-humidity installations and possible water from events like riding in the rain. The accent panel on the top of the amp has been enlarged to cover the top cover panel gaps, and all of the panel gaps have been tightened to reduce the chance of water drips from getting into the amp. Finally, the upgraded speaker connection blocks feature a sealed design that routes any moisture that enters from the top away from the circuit board. These key design features help make the MOTO 720 an ideal option for Motorcycle, Marine, Powersports, and Automotive installations alike.

What separates the MOTO720 from the ultra-compact amplifiers that many people use in Powersports applications is the sound quality. The engineering masterminds at ARC Audio have improved the already impressive S/N Ratio and THD specifications over the already-fantastic MOTO 600.4. Advances in power supply design and components have improved overall efficiency to an incredible 94% while reducing EMI and RFI noise production to ensure audio systems sound great.


Multi-Channel Amplifier (Four-Channels)
Microprocessor Class-D Design.
Designed And Engineered By Robert Zeff.
High-Frequency Power Supply Design For Improved Signal Transparency And Overall Sound Quality.
Built-In Internal Fan For Additional Cooling
Microprocessor Controlled Auto Sense Turn-On Technology (DC, Signal, Hard Trigger selections)
Full-Range Amplifier Design
PP Coated And Treated Design Components For The Highest Level Of Environmental Protection
Single Side Plug And Play (PNP) Connection Design.
Water Tight Direct Connect Speaker Terminals.
Balanced Differential Signal Input Design.
Audiophile Class-D Output Filter Networks.
Detailed Microprocessor Controlled Protection.
Large, High-Frequency Switching Power Supplies.
Differential Inputs allow for RCA and Speaker level inputs (Switch Selectable)
Fault Codes Storage Of The Last Protection Code Detected
High Signal To Noise Ratio Without Compromising Power Output.
Fully Balanced Input Stage Significantly Increases Flexibility
Ultra-Low ESR, High Capacity Power Supply Storage capacitors.
Bridged Mode Auto Detect Turn-On Works With Most Chip Based OEM Head units.
Precision Filtering Isolates The Power supply Reducing Unwanted Interference In Radio Reception

$ 749.00 $ 449.99
Arc Audio X2 850.5 Multi Channel Amplifier - Previous Demo Unit Sale
Arc Audio X2 850.5 Multi Channel Amplifier - Previous Demo Unit
Perfect working condition, Excellent cosmetic condition. 
Come with a Bass knob and Hi level input pigtails


One amplifier running an entire system without compromise to sound quality of overall performance? Yes, it's true! Robert Zeff has done it again with a single package solution designed to run your speakers and subwoofers from a single, compact amplifier.

The X2 850.5 is a compact and elegant design that is small enough to fit just about anywhere in a vehicle allowing you that personalized musical experience without the loss of valuable storage space.

Capable of delivering 85 watts to each of the four main channels, the X2 850.5 provides enough power and dynamics to satisfy most audio enthusiasts without straining or reaching the limits of the amplifier design. Old school "Grunt" but with next century technology and miniaturization, this isn't your everyday Class-D amplifier.

Not a fan of the silver top cover finish and want the black hairline finish found on the X2  Amplifier Series? No problem. All Level 1 X2 amps can be upgraded with the Level 2 XDi cosmetic shroud kit. Simply purchase the XDi Trim Kit that suits your needs and drop it right on the X2 amplifier (Note that the XDi trim kits only come with the illuminated XDi badge. The X2 illuminated badge is not available at this time).

  • Multi-Channel Amplifier (5-Channels)
  • Microprocessor Class-D Design
  • Designed And Engineered By Robert Zeff
  • High-Frequency Power Supply Design For Improved Signal Transparency And Overall Sound Quality)
  • Level 1 X2 Cosmetics Package - Texture Coated Stamped Steel Cosmetic Cover With Aluminum Logo Badge. (Changeable to Level-2 XDi Cosmetics)
  • Single Side Connection Design
  • Full-Range Design
  • Nickel-Plated RCA Terminals
  • Quick Disconnect Speaker Terminal Plugs
  • Audiophile Class-D Output Filter Networks
  • Detailed Micro Processor Controlled Protection
  • Large, High-Frequency Switching Power Supplies
  • RCA Inputs Are Compatible With Speaker Level Inputs
  • Fault Codes Storage Of The Last Protection Code Detected
  • High Signal To Noise Ratio Without Compromising Power Output
  • Fully Balanced Input Stage Significantly Increases Flexibility
  • Ultra-Low ESR, High-capacity Power Supply Storage Capacitors
  • Flexible Mounting Orientation For Vertical Or Horizontal Installations
  • Next-Generation High-Speed Class-D Technology Powering All XDi Amplifiers.
  • Bridged Mode Auto Detect Turn-On Works With Most Chip Based OEM Head Units
  • Precision Filtering Isolates The Power Supply Reducing Unwanted Interference In Radio Reception
  • Block Type Terminal Connections

4-Channels @ 4 Ohms (Ch 1-4) 85 Watts
4-Channels @ 2 Ohms (Ch 1 - 4) 125 Watts
2-Channel @ 4 Ohms (Ch 1-4 Bridged) 250 Watts
1-Channel @ 4 Ohms (Ch 5) 225 Watts
1-Channel @ 2-Ohms (Ch 5) 400 Watts
Frequency Response 10Hz - 20kHz
Crossover Range (Ch 1-4) 50Hz - 550Hz
Crossover Range (Ch 5) 30Hz - 230Hz
Bandpass Capable No
Bass Boost Variable 0-12 dB @ 45Hz
Cosmetic Trim X2 Trim Level 1
Remote Level Control Included Yes
Input Sensitivity (Low) 200mV - 3.5V
Fuse 3 x 30 Amp
Dimensions 12.42"(L) x 6.268"(W)x2.162"(H)
$ 769.00 $ 425.00
Arc Audio X2 1100.5 Multi Channel Amplifier - Previous demo unit Sale
Arc Audio X2 1100.5 Multi Channel Amplifier - Previous demo unit
Perfect working condition, Excellent cosmetic condition. 
Come with a Bass knob and Hi level input pigtails

One amplifier running an entire system without compromise to sound quality of overall performance? Yes, it's true! Following the success and bar-raising XDi Series, the X2 Series of amplifiers offer users enhanced performance, bandpass crossovers on all channels, and improved filtering to extend the XDi application legacy. These upgrades make X2 one of the finest affordable multi-channel all-in-one amplifiers available.

Robert Zeff has does it again with this single package solution designed to run your mid's/highs and subs from a single compact amplifier.

The X2 1100.5 is a compact and elegant design that is small enough to fit just about anywhere in a vehicle allowing you that personalized "Big Sound" without the loss of valuable storage space.

Capable of producing 150 watts to each of the four main channels; the X2 1100.5 provides enough power and dynamics to satisfy any audio enthusiast while still leaving enough in reserve for those late-night jam sessions. With its elegant silver brushed-aluminum extruded aluminum cosmetic case (X2 Level 2 cosmetics package) and affordable price point, the X2 amplifier series is perfect for the daily driver or the wildest of custom installations.

  • Multi-Channel Amplifier (5-Channels)
  • Microprocessor Class-D Design
  • Designed And Engineered By Robert Zeff
  • High-Frequency Power Supply Design For Improved Signal Transparency And Overall Sound Quality
  • Remote Bass Boost Control (Included)
  • Extruded Aluminum CNC Chassis Design (Level 2 X2 Cosmetics)
  • Start-Stop Vehicle Compatible
  • Signal Sense and DC Detect
  • Single Side Connection Design
  • Nickel-Plated RCA Terminals
  • Quick Disconnect Speaker Terminal Plugs
  • Audiophile Class-D Output Filter Networks
  • Detailed Microprocessor Controlled Protection
  • Large, High-Frequency Switching Power Supplies
  • RCA Inputs Are Compatible With Speaker-Level Inputs
  • Fault Codes Storage Of The Last Protection Code Detected
  • High Signal To Noise Ratio Without Compromising Power Output
  • Fully Balanced Input Stage Significantly Increases Flexibility
  • Ultra-Low ESR, High-Capacity Power Supply Storage Capacitors
  • Flexible Mounting Orientation For Vertical Or Horizontal Installations
  • Next-Generation High-Speed Class-D Technology Powering All X2 Amplifiers
  • Bridged Mode Auto Detect Turn-On Works With Most Chip Based OEM Headunits
  • Precision Filtering Isolates The Power Supply Reducing Unwanted Interference In Radio Reception
  • Quick Disconnect Type Terminal Connections

4-Channels @ 4 Ohms (Ch 1-4) 150 Watts
4-Channels @ 2 Ohms (Ch 1 - 4) 150 Watts
2-Channel @ 4 Ohms (Ch 1-4 Bridged) 300 Watts
1-Channel @ 4 Ohms (Ch 5) 275 Watts
1-Channel @ 2-Ohms (Ch 5) 500 Watts
Frequency Response 10Hz - 20kHz
Crossover Range (Ch 1-4) 50Hz - 550Hz
Crossover Types (Ch 1-4) Bandpass All Channels
Crossover Range (Ch 5) 30Hz - 230Hz
Bandpass Crossovers Yes (Ch 1/2 only)
Remote Level Control Yes(Ch 5 only)
Remote Level Control Included Yes
Input Sensitivity (Low) 200mV - 3.5V
Cosmetic Trim X2 Trim Level 2
Fuse 3 x 30 Amp
Dimensions 12.42"(L) x 6.268"(W) x 2.162"(H)
$ 959.00 $ 475.00

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