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3E AUDIO A7 MONO Amplifier

New
3E Audio, a recognized player in the DIY world, now offers a Class D mono amplifier incorporating audiophile Hi-Fi components. The A7 Mono amplifier is based on one TI TPA3255 chips in PBTL configuration, and a dual OPA1656. This means it can deliver up to 1x 260W into 4 ohm power.

Average votes for this product
4.0 / 5
  Based on 1 customers reviews.

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Reference : 20377
New product

239,00 €tax incl.

199,17 € tax excl.
Including 0,05 € for green tax

- +

 
Shipping date: 11-02-2025.

Orders placed before 12h (GMT+1) will generally be shipped the same day (working day).

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2 Years warranty

Accessories for this product

 
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3E Audio A7 MonoClass D Mono Amplifier PBTL 1xTPA3255 1x260W 4 ohm

Photo of 3E Audio A7 Mono

3E Audio, a recognized player in the DIY world, now offers a Class D mono amplifier incorporating audiophile Hi-Fi components. The A7 Mono amplifier is based on one TI TPA3255 chips in PBTL configuration, and a dual OPA1656. This means it can deliver up to 1x 260W into 4 ohm power.

In terms of connectors, the 3E Audio A7 mono features an RCA input, a practical balanced XLR/Jack 6.35mm combo input, and an output on speaker terminals. The RCA input gain can be adjusted (LOW=26dB, HIGH=29dB), and the preamplifier stage and volume control can be bypassed for use as a power amplifier. Versatile and high-performance, this little amplifier is able to offer a good reserve of power while preserving the final sound reproduction.

A7

A7se

A7 Mono

A5se

A5

Amplification chip

2x TPA3255
2ch - PBTL

1x TPA3255
2ch - BTL

1x TPA3255
1ch - PBTL

1x TPA3251
2ch - BTL

2x TPA3251
2ch - PBTL

Output power

(4 ohm, THD+N=1%)

2x 250W

2x 230W

1x 260W

2x 140W

2x 150W

Output power

(8 ohm, THD+N=1%)

2x 140W

2x 130

1x 150

2x 70W

2x 80W

Load impedance

2-16 ohm

4-16 ohm

2-16 ohm

4-16 ohm

2-16 ohm

3E Audio A7 Mono: TPA3255 chip

The TPA3255 amplifier chips offer a consistent level of output power, as the 3E Audio A7 mono delivers up to 1x 260W into 4 ohm and up to 1x 150W into 8 ohm (THD+N = 1%). In addition, the PBTL configuration maintains continuous, stable output power while reducing power losses. It also enables the amplifier to withstand loads of up to 2 ohms.

TPA3255 chips
Interchangeable DIP8 OPAs

3E Audio A7 Mono: Interchangeable OPA

The preamplifier stage of the 3E Audio A7 Mono is made up of a dual OPA1656 OPAs mounted in DIP 8 and easily replaceable with pliers, thanks to the design of the case. In fact, the OPAs can be accessed through two hatches without opening the case. Here's a non-exhaustive list of compatible OPAs: OPA1656, OPA1602, OPA2134, NE5532P, LME49720, LM4562, MUSES02, MUSES8920, NJM4580, NJM4556, NJM2068, OP249, AD827, etc.

Please take care not to damage the device or the OPAs when replacing or handling them. Any damage to the device caused by improper handling by the user (reverse mounting of OPAs, mounting of non-compatible OPAs, etc.) will invalidate the product warranty. Please refer to the manual to carry out the operation.

3E Audio A7 Mono: Quality components

Elna Silmic II

Elna Silmic II

ELNA Silmic II capacitors have proven capacities and are often used in Hi-Fi applications.

Rubycon 63V 1000uF capacitors

Rubycon 63V 1000uF capacitors

Rubycon capacitors meet high current requirements, reducing noise and improving THD.

Flat wire coils

Flat-wire coils

The coils used in the amplifier provide improved linearity and reduced distortion, while delivering the best performance whatever the load.

TDK capacitors

TDK capacitors

These highly reliable LC filter capacitors ensure optimum audio performance.

3E AUDIO A7 Mono amplifier PCB photo

3E Audio A7 Mono overview

Overview of the 3E Audio A7 Mono
1Left channel status LED
2RCA input status LED
3Multifunction button
4XLR input status LED
5Right channel status LED
6Balanced XLR/Jack 6.35mm combo input
7RCA input
8RCA gain control
9Speaker terminal output
10Volume bypass
1138V-52V DC power supply via DC jack

Technical characteristics

Specifications
Product typeClass D amplifier
ChannelsMono
Amplification chip1x TI TPA3255
OPADual OPA OPA1656
StructurePFFB
Inputs1x Single-ended RCA input
1x Balanced XLR/jack 6.35mm combo input
Output1x Speaker terminal output
Input impedanceRCA : 10KΩ
XLR/TRS : 20KΩ
Volume attenuation-50dB
Volume bypass
RCA gain control
Audio specifications (RCA IN)
THD+N (5W)0.0007% @ 4Ω
0.0006% @ 8Ω
SNR (1% THD+N, 1KHz, A-wt)123dB
Dynamic range (1% THD+N, 1KHz, A-wt)123dB
Frequency response (±0.5dB)20Hz-30KHz
Noise (A-wt)< 20uVrms
Crosstalk-120dB
Gain26dB / 29dB
Input sentivity1.75Vrms
Output power (1% THD+N)1x 480W @ 2Ω
1x 260W @ 4Ω
1x 150W @ 8Ω
Output power (10% THD+N)1x 600W @ 2Ω
1x 320W @ 4Ω
1x 200W @ 8Ω
Output impedance2Ω-16Ω
audio Specification (XLR IN)
THD+N (5W)0.0006% @ 4Ω
0.0005% @ 8Ω
SNR (1% THD+N, 1KHz, A-wt)126dB
Dynamic range (1% THD+N, 1KHz, A-wt)126dB
Frequency response (±0.5dB)20Hz-35KHz
Noise (A-wt)< 15uVrms
Crosstalk-130dB
Gain20dB
Input sensitivity3.5Vrms
Output power (1% THD+N)1x 480W @ 2Ω
1x 260W @ 4Ω
1x 150W @ 8Ω
Output power (10% THD+N)1x 600W @ 2Ω
1x 320W @ 4Ω
1x 200W @ 8Ω
Output impedance2Ω-16Ω
General
Power supply38V-52V DC 5A/9A
Power consumptionOFF: < 0.4W
ON (no audio): 6W
Dimensions170 x 168 x 46mm
Weight1000g
Package1x 3E Audio A7 Mono amplifier
1x 48V 10A mains adapter
 
Data sheet
InputJack 6.35mm
InputRCA
InputXLR
OutputSpeaker terminal
ColorBlack
Channel1 (Mono)
ClassClass D / T
Amplifier chipTPA3255
Power (W)260.0
Remote ControlNo
 
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Average votes
4.0 / 5
1 reviews
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 4/5
Date :
Very highly recommended (with a small caveat)
This is definitely a one-of-a-kind class D amplifier
Stays cool (unlike other PFFB amplifiers), superb sound quality (check out the measurements on audiosciencereview and archimago's site)
The reason for the 4 stars is that it has an auto-standby feature that cannot be adjusted or switched off. This is really annoying and for me this is a bug, not a feature
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This review has been posted for 3E AUDIO A7 MONO Class D Mono Amplifier PBTL 1xTPA3255 1x260W 4 Ohm
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3E AUDIO A7 MONO Class D Mono Amplifier PBTL 1xTPA3255 1x260W 4 Ohm
3E AUDIO A7 MONO Class D Mono Amplifier PBTL 1xTPA3255 1x260W 4 Ohm
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3E AUDIO A5 Class D Stereo Amplifier PBTL 2xTPA3251 2x150W 4 ohm
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3E AUDIO A7SE Class D Stereo Amplifier BTL 1xTPA3255 2x230W 4 Ohm

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