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Peachtree Audio Grand Integrated
Stereo integrated amplifier with built-in DAC
| Watch a product review |
CES: Peachtree Grand Pre and Grand Integrated
Crutchfield: Peachtree Audio story
Item # 731GRNDINT | MFR # Grand Integrated
This item is no longer available.
Our take on the Peachtree Audio Grand Integrated by Crutchfield's Woody Sherman
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 that will ensure clean, powerful sound from your favorite headphones
The arrival of Peachtree Audio's Grand Integrated, a 400-watts-per-channel integrated amp, suggests that they've been tapping into your brainwaves. The features listed above are all present and accounted for in a solid yet pleasing 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. Jitter is effectively eliminated by an asynchronous USB input and specialized reclocking circuitry, and galvanic isolation at the DAC board means no electrical noise can contaminate your signal.
Let's talk about a favorite detail: the Bascom King tube buffer. Twin 12AX7 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 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 400-watts-per-channel rating, but if you're running 4-ohm speakers, that ups the ante to a ground-shaking 650 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 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'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.
- 400 watts x 2 channels into 8 ohms, 650 watts x 2 channels into 4 ohms
- switchable Bascom King hybrid tube buffer design smoothes harsh digital edges from compressed 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
- 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 into a home theater setup by making Aux 1 a "throughput" for the surround processor
- 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 16-1/2"D
- weight: 28 lbs.
- warranty: 2 years parts and labor, 6 months on tubes
- Our 60-day money-back guarantee
What's in the Box:
- Integrated Amplifier
- 5' AC power cord
- Remote control
- 2 'AAA' batteries
- 2 Spare fuses
- USB Driver Installation Disk
- Instruction Booklet
Features and Specs
|Watts RMS per Channel (8-ohms)||400|
|Watts RMS per Channel (6-ohms)||500|
|Watts RMS per Channel (4-ohms)||650|
|Minimum Impedance||4 ohms|
|Signal to Noise Ratio||104|
|Digital Music Features|
|Built-in DAC (Digital to Analog Converter)||Yes|
|High-resolution Audio Playback||No|
|Total Analog Inputs||2|
|Optical Digital Inputs||2|
|Coaxial Digital Inputs||2|
|Dimensions and Warranty|
|Parts Warranty||2 Years (tubes 6 mos.)|
|Labor Warranty||2 Years|
Overview: The Peachtree Audio Grand Integrated Amp houses four custom matched component in one chassis. The Grand Integrated Amp consists of a high-resolution DAC, a hybrid tube preamplifier, a 400W 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 Amp.
Aluminum Construction: The Grand Integrated 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 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 Amp's preamplifier is designed to maintain the quality of the digital-to-analog conversion through a 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 Amp employs a Bascom King hybrid tube design using two musically legendary 12AX7s. 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 Window: The Grand Integrated features two tube windows which allow you to view the glow of the unit's tube (mainly for show).
400 Watt Class D Amplifier: The Peachtree Audio Grand Integrated Amp employs a 400 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 650 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.
Remote Control: The Peachtree Audio Grand Integrated 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 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 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 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 Amp.
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.
Optical & Coaxial Digital Inputs: The Peachtree Grand Integrated 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 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 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 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 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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