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Peachtree Audio Grand Integrated X-1

Stereo integrated amplifier with built-in DAC

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  • Peachtree Audio Grand Integrated X-1

    Front

  • Peachtree Audio Grand Integrated X-1

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  • Peachtree Audio Grand Integrated X-1

    Front, 3/4 view, from left

  • Peachtree Audio Grand Integrated X-1

    Front, 3/4 view, from right

  • Peachtree Audio Grand Integrated X-1

    Remote

 

Our take on the Peachtree Audio Grand Integrated X-1

by Woody Sherman
Peachtree Audio

Everything you always wanted in a stereo receiver, except the radio

An integrated amplifier is essentially a receiver without a built-in AM/FM tuner. You get power to drive your speakers, audio controls, and inputs for music source components. Connect an iPod, a computer, a network music player, or any other device that can play Internet radio, and you may find you have no need for an AM/FM radio.

Upgrade your computer audio experience

If you were to compile a wish list of the top four things you'd need for the heart of a modern, no-holds-barred stereo system, they'd probably include these vital components:

1) a top-quality digital-to-analog converter (DAC), to restore the musicality in today's file-based music libraries
2) a hybrid preamplifier that offers the best features of both tube and solid-state technology
3) a high-efficiency class D amplifier with massive power to drive large, demanding speakers
4) a dedicated headphone amp to ensure clean, powerful sound from your favorite headphones

The Peachtree Audio Grand Integrated is built to handle your whole music library

The Peachtree Audio Grand Integrated X-1 is built to handle your whole music library.

The arrival of Peachtree Audio's Grand Integrated X-1, a 440-watts-per-channel integrated amp, suggests that they've been tapping into your brainwaves — and those of all like-minded music lovers. The features listed above are all present and accounted for in a solid yet elegant form that combines maximum power with maximum control.

Digital and analog goodness

The globally-acclaimed ESS Sabre32 9018 32-bit DAC is uniquely equipped for the world of computer audio. This X-1 iteration of the Grand Integrated features a specially designed XMOS receiving chip, which makes high-resolution audio easier for your computer to handle by simplifying or eliminating the drivers your computer requires. Jitter is effectively eliminated by an asynchronous USB input and specialized re-clocking circuitry, and galvanic isolation at the DAC board means no electrical noise can contaminate your signal.

Smooth moves

Let's talk about a favorite detail: the Bascom King tube buffer. Twin 12AU7 tubes, the stuff of musical legend, stand at the ready to apply their smoothing analog goodness to the rough edges of less-than-stellar digital sources. The Class A headphone amp's signal also runs through the tube stage for your solo listening enjoyment. A tube bypass switch on the remote lets you choose between solid-state and hybrid tube listening.

Power to light up a room — or a neighborhood

Well, all that's great, but what about the power, you say? Try this on for size: An energy-efficient, cool-running class D amplifier. We've mentioned the 440-watts-per-channel rating, but if you're running 4-ohm speakers, that ups the ante to a ground-shaking 770 watts per channel with minimal harmonic distortion. You'll experience limitless dynamic range, no matter how demanding your loudspeakers are.

Your home theater benefits, too

Home Theater bypass switching means you can easily fold the Peachtree Audio Grand Integrated X-1 into your home-entertainment surround sound system. Here's how it works: Connect your surround receiver's front left and right preamp outputs to the Grand Integrated X-1's "AUX/HT" analog input. Connect your main left and right speakers to the Grand Integrated's speaker outputs. Engage the home theater bypass switch on the Grand Integrated's back panel. It now powers your main left and right speakers for multichannel sources that are connected to your receiver, such as your Blu-ray player. You use the same L+R speakers for the stereo music sources plugged into the Grand Integrated. Your surround sound benefits from its clean power on the crucial front left and right channels, while your stereo sources avoid the relatively noisy forest of circuitry in your receiver. It's the best of both worlds.

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Highlights:

  • 440 watts x 2 channels into 8 ohms (20-20,000 Hz) at less than 0.5% THD
  • 770 watts x 2 channels into 4 ohms (20-20,000 Hz) at less than 0.5% THD
  • XMOS receiving chip makes high-resolution digital audio easier for your computer by simplifying or eliminating drivers required, decreasing RAM usage and increasing overall headroom
  • switchable Bascom King hybrid tube buffer design smooths harsh edges from compressed digital sources
  • high-current class D power amplifier
  • asynchronous I2S communication lowers incoming jitter and sends the signal to the on-board ESS Sabre32 ES9018 DAC
  • Sabre DAC reduces jitter even further by re-clocking the incoming signal before processing
  • user-selectable DAC filter slopes allow you to tailor sound to personal preference
  • S/N ratio at the variable analog output: 104dB
  • 5 digital audio inputs: 1 BNC, 2 optical, and 2 coaxial
  • 2 pair RCA analog audio inputs (1 shared for home theater bypass)
  • 2 pair RCA audio preamp outputs (1 80Hz high-pass switchable) for connecting a powered subwoofer or outboard power amplifier
  • Aux/HT Bypass Switch: HT bypass mode allows the user to integrate the Grand Integrated X-1 into a home theater setup by making Aux 1 a "throughput" for the surround processor
  • fixed output line out for using the Grand Integrated X-1 as a remote-switching DAC only
  • built-in high-performance headphone amplifier
  • heavy-duty binding-post speaker connectors
  • detachable power cord
  • remote control
  • 17-1/2"W x 4-13/16"H x 17-15/16"D
  • weight: 28 lbs.
  • warranty: 2 years parts and labor, 6 months on tubes
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
General
Watts RMS per Channel (8-ohms)
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440
Watts RMS per Channel (6-ohms)
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605
Watts RMS per Channel (4-ohms)
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770
Frequency Bandwidth
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20-20k
THD
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0.5%
Minimum Impedance
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4 ohms
Signal to Noise Ratio
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104
Number of Inputs
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8
Phono Inputs
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No
Preamp Outputs
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2
Width (inches)
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17-1/2
Height (inches)
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4-13/16
Depth (inches)
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17-15/16
Weight (pounds)
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28
Parts Warranty
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2 Years (6 months tubes)
Labor Warranty
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2 Years
Product Research
What's in the box?

Download owner's manual

  • Integrated Amplifier
  • 5' AC power cord
  • Remote control
  • 2 'AAA' batteries
  • 2 Spare fuses
  • XMOS Driver Installation Disk (for Windows)
  • Instruction Booklet

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Features
Controls
Connections

Features

Overview: The Peachtree Audio Grand Integrated X-1 Amp houses four custom matched component in one chassis. The Grand Integrated X-1 Amp consists of a high-resolution DAC, a hybrid tube preamplifier, a 440W per channel high-efficiency amplifier, and a state-of-the-art headphone amp. Both your analog and digital source will sound exceptional through the Peachtree Audio Grand Integrated X-1 Amp.

Aluminum Construction: The Grand Integrated X-1 Amp's aluminum faceplate is over a 1/2" thick, with titanium buttons, and engraved input names. The unit weighs in at 28 lbs. 

High-Resolution DAC: At the heart of the Grand Integrated X-1 Amp is the top of the line ESS Sabre32 9018 digital-to-analog converter, specialized for computers or other sources that deliver high levels of timing errors. The ESS Sabre³² DACʼs patented jitter-reduction circuit re-clocks the digital signal to less than three picoseconds before passing it through its high-resolution processor.

Pre-Amplifier: The Grand Integrated X-1 Amp's preamplifier is designed to maintain the quality of the digital-to-analog conversion through a I short signal path avoiding noise and signal loss. A dual mono gain control is used, measuring .025db channel to channel, creating pinpoint imaging for a virtual 3D soundstage. Its wide dynamics and black backgrounds are created by discrete Class A output stages with up to 18V output.

Tube Buffer: The Grand Integrated X-1 Amp employs a Bascom King hybrid tube design using two musically legendary 12AU7s. The tube buffer will smooth the harsh digital edge found in poor recordings and compressed audio. A tube bypass button, found on the remote control, allows for solid state or hybrid tube listening modes. This is also possible when using the built-in high-performance headphone amplifier.

Tube Windows: The Grand Integrated features two tube windows which allow you to view the glow of the unit's tube (mainly for show).

Galvanic Isolation: Galvanic Isolation prevents electrical noise from entering the DAC board on all grounded digital inputs. Any contamination due to the switching power supply, multiple ground points, and high-speed processing is isolated from the DAC so nothing but pure 1's and 0's reach the board. That means better signal, less noise and the most significant improvements in USB sound quality overall.

440 Watt Class D Amplifier: The Peachtree Audio Grand Integrated X-1 Amp employs a 440 watt x 2-channel (in 8-ohms, at 20-20khz) Class D amplifier. The Class D amplifier is 90% energy efficient with very little heat output and very low total harmonic distortion (0.5% THD). Power output increases to a staggering 770 watts per channel into 4 ohms. The amplifier has the ability to drive the most demanding speakers.

Headphone Amp: The Peachtree Audio Grand Integrated features state-of-the-art headphone amp with a front-panel 1/4" headphone jack for private listening.

Controls

Remote Control: The Peachtree Audio Grand Integrated X-1 Amp includes an IR remote control for wireless operation of the integrated amplifier.

Power Switch: The main power switch is located on the rear-panel of the Grand Integrated X-1 Amp. Once the main power switch has been turned on, you can power on/off the integrated amplifier from the front power button or remote control.

Volume Control: The front-panel volume control is motorized from the remote control and has a button indicator to allow the user to see levels from a distance.

Digital Filter Slope: User selectable DAC filter slopes allow for a sharp slope which measures better and a soft slope that is preferred by many audiophiles.

AUX/HT Bypass Switch: This switch selects between Home Theater Bypass mode or Standard AUX Line Input mode. In HT Bypass mode, it allows you to integrate the Grad Integrated Amp in to a home theater system by making AUX 1 a "throughput" for the surround processor. And allows you to use an the internal amplifier of the Grand Integrated X-1 Amp for stereo use and for the front left and right speaker in your home theater.

Note: Do not switch to HT Bypass mod while the Grand Integrated X-1 Amp is actively playing music or a soundtrack through the Aux input.

High-Pass Switch Selector: When this switch is activated, the unit's High Pass Pre-Out outputs at 80Hz and above with a 12dB/octave slope. This high pass filter mode is advised when using a small satellite speaker with a subwoofer.

Phase: When activated by the remote, both channels of the preamp output will be 180-degrees out of phase. This is used to correct sources that stream signal out of phase to the Grand Integrated X-1 Amp.

Connections

Asynchronous USB Port: The Peachtree Audio Grand Integrated Amp is equipped with a USB port to connect to your computer. It is 24-bit/192kHz capable, accepting 44.1, 48, 88.2, 96, 176.4, and 192khz sampling rates, and uses the latest in asynchronous I2S communication. Asynchronous allows the Grand Pre's internal high-precision clock to control the flow of data coming from the computer. This method lowers incoming jitter so the Sabre DAC has less timing errors to reclock. The galvanic isolated input eliminates noise generated by your computer's switching power supply and greatly improving the sound quality.

Note: The Grand Integrated X1 uses an XMOS receiving chip. This makes high resolution audio easier for your computer to handle because it requires no drivers for Mac OS and a very simple driver setup for Windows (using included XMOS Driver for Windows CD-ROM); plus it uses less RAM, so your computer has more headroom and sounds better.

Optical & Coaxial Digital Inputs: The Peachtree Grand Integrated X-1 Amp is equipped with two optical and two coaxial digital inputs for connecting external digital audio sources such as a CD or DVD player.

BNC Digital Input: The Grand Integrated X-1 Amp also features a BNC digital input (75-ohm) which is found on high-end computer soundcards and some pro audio products.

Unbalanced RCA Inputs: The Grand Integrated X-1 is fitted with two pair of unbalanced stereo RCA inputs to connect to analog sources.

Pre-Out: The unbalanced RCA preamp-out connections (8V rms/11.2V peak, 448-ohms) will allow you to use an external amp with the Grand Integrated, and also provide connections for a subwoofer.

Line Output: This fixed RCA output (2V rms, 448-ohms) will allow you to feed the Grand Integrated X-1 Amp's sources into another preamplifier's input.

Binding Post Speaker Terminals: The Peachtree Audio Grand Integrated Amp is fitted with four heavy-duty, gold-plated binding-post speaker terminals to connect your left and right speakers. The binding-post speaker terminals can accept bare wire (up to 10AWG), banana-plugs (single only), spade-connectors, and pin-connectors.

Headphone Output: The Grand Integrated X-1 Amp utilizes a front-panel, 1/4" headphone input which mutes the speakers when headphones are plugged in.

12-Volt Triggers: The 12-volt input & output triggers enable automatic turn on and off from or to another source with the same feature (2-12V) .

 
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