Peachtree Audio Decco125 Integrated Amplifier w/ Phono, DAC, Spotify, AirPlay - 120WPC

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General:
The Peachtree Audio Decco125 is quite an incredibly powerful and feature-packed integrated amp for its compact size. 

Standout features include an internal phono stage, an optical digital input, and streaming capability with Apple Airplay and Spotify Connect. 

Thanks to its Class D power amplification section it's also capable of 120 watts per channel at 8 ohms! This is sufficient power for almost any speaker.

This integrated is great for someone looking for a simple setup that doesn't sacrifice sound quality. 

Included with the integrated is the  original remote and manual.

SkyFi Cosmetic Notes:
Very good condition overall. Some very minor hairline scratches on the glossy finish.

SkyFi Technical Notes:
The Muzo Player iOS/Android app mentioned in the manual appears to be end of life and no longer available. This discontinued app allowed some remote control functionality which the remote control handles just fine - and probably better.

Wi-Fi supports Apple AirPlay Streaming and Spotify Connect Streaming. Both tested and working as they should.

Ownership:
Second Owner

Connections:
RCA, Optical Digital input, 5 Way Speaker binding Posts, USB input

General Sound:
Smooth, uncolored, undistorted natural and clean

Cosmetic Condition:
8/10 = Very Good. Excellent front faceplate, one minor flaw on chassis side or top. See our detailed rating description here.

Working Condition:
Working perfectly and tested in our lab and listening room.

Included:
Unit, remote, and power cord.

Packing:
Will be packed using our highly developed in-house process and custom packing materials.Original MSRP:
$1,199.00

Specs:
Amplifier Section
- Output power: 120 watts per channel into 8Ω (<1% THD+N)
- Compatible speaker impedance: 4–16Ω
- Frequency response (speaker output): 20 Hz – 20,000 Hz ±3 dB
- Intermodulation distortion: -60 dB (100 Hz / 2 kHz, 4:1, -30 dBFS)
- Total harmonic distortion: 0.03% (1 kHz, 4Ω, 1 W)
- Channel separation (1 kHz, 8Ω): 94 dB

Preamp Output
- Output voltage (RMS): 920 mV
- Output impedance: 100Ω
- Signal-to-noise ratio: 100 dB (analog or digital source, unweighted)
- Channel separation at 1 kHz: 92 dB
- Frequency response (8 Hz – 20 kHz): ±0.1 dB
- Total harmonic distortion: 0.007% (1 V RMS, 1 kHz, A-weighted)

Headphone Output
- Output power (32Ω, RMS): 17 mW
- Signal-to-noise ratio: 107 dB (unweighted)
- Channel separation (1 kHz): 102 dB
- Frequency response (8 Hz – 100 kHz): ±0.5 dB
- Total harmonic distortion: 0.01%

Digital Inputs
- USB-B input: PCM, 16–24 bit / 44.1–96 kHz
- Optical & Coax inputs: PCM, 16–24 bit / 44.1–96 kHz

Analog Inputs
- AUX input: Max 840 mV RMS, impedance 10 kΩ
- Phono input (MM): Max input 18 mV @1 kHz, input impedance 47 kΩ

Power
- AC input: 100–240V AC, 50/60 Hz
- Max power consumption: 400 W
- Idle power: ~18 W
- Standby power: <2 W

Dimensions:
Height: 89 mm / 3.5 in
Width: 250 mm / 9.84 in
Depth: 363 mm / 14.29 in

Weight:
10 lbs.

Link to Manual:
Click Here

Recommended Cables:
Kimber Kable - RCA Interconnects - Better

Kimber Kable - RCA Interconnects - Best

Kimber Kable - Phono Interconnects

Kimber Kable - Speaker Cables - Better

Kimber Kable - Optical Digital Interconnect

Kimber Kable - Select Series Reference USB Cable

Testing Process:
We start with a visual inspection of all internal components to make sure that there are no signs of heat stress or damage. Capacitors are checked for telltale signs of predictive failure including bulging, shrunken wrappers, or physical leakage. We also inspect the PCBs for discoloration from resistors or transistors that may have been running hot. On vintage units we often spot check select capacitors for value and ESR.

If the device has the ability to decouple the preamplifier from the power amplifier, we remove the jumpers and independently test each section. If the device cannot be decoupled, we assess the electronic condition of the piece by analyzing the speaker level output only.

We start by connecting the "Pre-Out" jacks of the integrated to a Sencore PA81 Power Analyzer which simulates real world loading conditions and gives us an oscilloscope interface. The first order of business is checking that the volume control works smoothly throughout its entire range with acceptable channel balance. This is accomplished by feeding a 1 KHz sine wave into one of the preamp’s line level inputs while monitoring the preamp’s output on an oscilloscope.

We then switch to a 1 KHz square wave to test the tone controls, loudness function, and filters where applicable. During this step we are watching for equal alteration of the test signal by both channels. This also helps us identify dirty controls that will need treatment.

Once the basic line stage functions are verified, we test each input individually. This is especially important for devices that use relays to select their sources.

If the preamp section is equipped with a phono stage we test that as well. We use an inverse RIAA filter which allows us to feed a reference test signal into the phono input with the proper RIAA equalization and level. A square wave or sine sweep is used to verify that the device’s phono stage is faithfully reproducing the RIAA curve.

Next we test the power amplifier section by connecting the integrated amplifier speaker outputs to a Sencore PA81 Power Analyzer which acts as a dummy load, DC offset monitor, and oscilloscope interface. We start with a low level 1 KHz test signal at the "Main In” jacks and slowly increase its amplitude while monitoring the output on an oscilloscope for signs of noise, clipping, distortion, or improper channel balance. We continue increasing the signal level until the amplifier reaches clipping.

At this point we take an output power measurement and compare it to the spec sheet of the amplifier to verify proper performance. We finish off the bench evaluation with a 1 KHz square wave check and a 20 Hz to 20 KHz sine sweep to assess the amplifier’s frequency response characteristics.

This battery of tests will usually reveal if the amplifier has any issues that need further attention.

If the preamp and power amp both pass these tests, we reconnect the sections and verify that the preamp section can drive the power amp to rated power with a 1KHz tone on one of the line level inputs.

Before the device leaves the bench, we perform a listening test with actual music using a variety of preferred test tracks. Our benches are outfitted with familiar monitor speakers which help us identify inconsistencies that will not always show up on our test gear. The main things that we are listening for are hum or noise with no signal present, proper center image, clicks, pops, or any other obvious undesirable audio characteristics.

If the unit passes all of these tests it moves to our long term testing rig where we simulate real word operating conditions for 6-8 hours minimum. This allows us to monitor the unit for signs of thermal runaway or intermittent issues that only crop up when the unit has fully come up to temperature.